Thursday, February 26, 2015

Xerox Copier/Printer Repair by Reliable at 773-671-0545


XEROX COPIER/PRINTER REPAIR TIPS BY RELIABLE :773-671-0545


For more current information, use the 


214
Misfeeds and how to get Xerox parts


Problem: Not pulling paper from the tray. 
Cause: A broken drive gear attached to the metal shaft that the primary feed tires are attached to.
Solution: Remove the back panel and the gear package behind it. There is a black plastic gear, which can be taken out by hand at this point. Xerox can be reached by their 800 number and then ask for parts. They will look it up in the parts book if you describe it properly. It's about 8 dollars plus shipping.  You may also obtain parts from other vendors.  See Smarka’s banner ads and search listings.


Workcenter 450cp multifunction   
Feeds more than one sheet of paper, replace separator pad, you can use rubber pad material that you can get at a local hardware store, like OSH. So far this has worked for me.


XC 830, 1045, 1255
These machines can be modified to take the Sharp ZT-81TD1 toner cartridges. Remove the cartridge and look at the back of the cavity where it goes. You will see a black plastic guide with an oval hole in it. This determines which cartridge will fit in the machine. If you look at the rear frame of the Xerox and the Sharp cartridge, you will notice the long oval extension is in a slightly different location.  If you remove the guide, the Sharp toner cart. will go right in.  You need a Long screw- driver, a springhook, a flashlight, and three hands to remove it. Actually it isn't that hard, use the springhook to pull the little hook at the bottom towards you while lifting up on the guide with the screwdriver and it will pop right out. Sorry, be sure to remove the drum also before you try this. These cartridges are nice to recharge and work very well. We sell a lot of them every month for $75 and it costs about $15 to recharge them. Be careful not to mix up the Sharp and Xerox carts. if you haven't modified the machines.


1012/5012 SERIES
UNEVEN DENSITY
When troubleshooting varying density of the copy on the 1012 family don't be to fast to jump into the Dev assembly. Check the copy with and without A/E. A bad illumination sensor or pwb will cause a similar strobing.
BANDING AND UNEVEN EXPOSURE
This is probably caused by dead mag roller. Try cleaning and sanding the mag roller otherwise it's a new dev tank.
CARTRIDGE FAILURE
Do you have a 1012 family copier that is prematurly going through cartridges because of scratches? The problem could be solved for as little as $.65. On the paper chute assemlby are two white delrin spacers one on each end. When paper jams under the cartridge these spacers prevent the baffle from contacting the drum. If they are worn or lost replace them part # 14P62282.
CARTRIDGE FAILURE
The inter image lamp in this model is critical. If if is bad or the pwb is bad a Copy Cartridge can fill in just a few hundred copies. The 1012 can have two different interimage lamps most easily detected by counting the connector pins either 3 or 4.
FEED ROLLERS
1012.5012,5014 feed tires. Remove the rubber feed from the assembly clean off old glue and take a pair of feed tires part number 20E4580 from the 5018 family. These will fit with slight modification the tabs on the ends will have to be cut off. Glue the new feed tires into the old assembly. These tires are available from other vendors than Xerox and run approx. $7.50 a pair.
JAMMING
If you get jamming between the feed tires and the registration roller, you may just need to add tension to the springs that add pressure to the small white rollers in the same area. Just reach in and bend them downward so they make more solid contact with the rollers underneath.


1012/5011/12/14 paper jams
Problem: If you are experiencing frequent paper jams at the registration gate, the problem may be very simple.
Solution: Check to see if the gate solenoid is working (diagnostic code 83). If so, check the magnet of the registration switch actuator. This is at the end of the switch actuator rod on the inboard end of the baffle. It is very common for the magnet to become impacted with toner which, has leaked from the back of the toner hopper. Clean away the toner and the solenoid should work when the switch is actuated.


1025/1038
Main Drive Motor
It is a good practice to remove the main drive motor frequently and remove the gears, wash the shafts and re-lube the gears. A good lube is LOCTITE NEVR SEEZ. It is a high temp grease that is used on threaded fasteners in areas exposed to high temperatures. It lasts longer in the gears than any other lube that I have tried.

NOISE
Problem: Loud screaching sound. Sounds like it comes from the developer unit.
Solution: (This one took me months to find) The main metal drive gear located in the center rear of the machine about 2.5" in diameter has a bushing going through the frame. I cleaned it and applied a little oil and it was fully resolved. Noises like this are hard to find because it is connected directly through the frame of the machine and hard to isolate.

INTERMITTENT / VARYING REGISTRATION
Check the lamp carraige home sensor - it may need cleaning or shifting. There is a small amount of adjustment on the sensor, but you can also install a washer or two as spacers.
COPY QUALITY - SLUGGISH OPERATION
Remove the main motor (4 screws behind main PWB) and lube two gears & shafts. Also check the registration gate shaft bushings for contamination by dev and crud.
ELECTRICAL
Intermittent display, blank display, frequently blown low voltage power supplies. This usually occurs on adh and sadh machines, but I have seen it on flat top also. the left rear of the top panel will interfere with the pj on the relay circuit board located behind the main circuit board. This interference will crack the solder connection on one of the pins usually the first one on the machines right. When having this problem check this connection closely. To repair resolder connection and adjust the left top cover support to its maxium position.
COPY QUALITY
Light copies.Very common on this machine. Many causes. Here is a list of things to check:
Check the dev bias lead where it plugs in to the frame of the copier. This is a very flimsy contact and can easily come off or break.
Make sure that the toner is not clumped up in one side of the toner hopper. The large spring inside the hopper that stirs the toner sometimes comes loose from the gear that turns it. This happens when the user shakes the top of the unit from side to side too violently. (It's supposed to be shaken to help break up the toner, but this sometimes backfires and dislodges it, preventing normal stirring.) Reseat the spring and refill the hopper.
Generic toner. Some of the less expensive brands have been known to cause light CQ. This machine is particularly sensitive. You might suggest to your customer that they use OEM toner and developer.
Broken gear. There is a small gear on the rear of the DV unit that frequently cracks and needs to be replaced.
Dispensation setting. Inside the door on the upper right of the machine there is a tone-up button. Above this is a knob for setting the toner dispensation rate. (This knob may be covered by a plastic cover held on by a plastic screw. Take this cover off and throw it away.) Make sure that this knob is set to the maximum.(Clockwise).
Toner hopper closed. Under the hopper is a lever type device that's shaped like a backwards "L". This opens and closes the toner "valve" for hopper removal. Frequently it gets moved and needs to be replaced into the down position. This opens up the opening and allows toner to flow into the DV unit.
NOISE
Squeaking. The main drive motor wears out and squeaks very loudly. This is very common. Replace the motor.
Chatter. The gears that transmit drive from the main drive motor to the fuser section wear out frequently and need to be replaced
Grinding. Developer falls into the feed shaft assembly underneath (and attatched to) the DV unit. Remove the guide, shaft, and bushings and clean them well before reinstalling them.
ELECTRICAL
Intermittent failure. Blinking display. The low voltage power supply fails regularly on this machine. It is located in the rear left hand side of the machine as viewed from the rear.(The big silver thing) Replace.


1040
COPY QUALITY
Background or black copies. Dim exposure lamp.There is a fuse inside the lamp ballast (located to the left of the HVPS inside the front of the machine) that blows occasionally. Replace.
Black copies. Exposure lamp inoperative. The ribbon cable that supplies the lamp breaks open from being flexed with every scan. Replace.
JAMMING
The density sensor (under the drum) also doubles as a paper path sensor. Toner frequently clogs it up and it can't see the paper. This usually results in code 8-12 jams and 1/2 copies being output to the tray. Just clean the sensor and run routine 9-71. This will set the reference for a clean sensor against a toner patch on the drum. If you have trouble setting this routine, you may have to adjust the ADC pot on the main board and try it again. Sometimes this sensor goes bad and needs to be repaired or replaced. There aren't many components on it so you can usually repair it fairly easily.
ADF MULTIFEEDS
The separation pads under the feed paddles (Xerox calls them Retard Pads) wear and need to be replaced. You can extend the life of these pads by placing a small shim under each one, (a small piece of folded paper will work). Clean the pads with alcohol or Fedron. (Or whatever you normally use on rollers and such.)
ADF MISFEEDS
Make sure that the small feet on the front of the ADF stick out 10.5 mm. These determine how high the front of the feeder rests and therefore the document belt pressure.
FUSER JAMS
The fuser on this machine is prone to getting air bubbles in the lube line. This causes the wick to get dry and subsequently the toner sticks to the roller instead of the paper. Check for air bubbles and purge them out by loosening the cap on the end of the wick manifold (keeping it higher than the rest of the fuser so the air will go out of it) and squeezing lube through the line until you see lube come out of the loose cap. Tighten the cap. You may need to clean the wick and manually put some lube on it to get it started.


1045/1048
ELECTRICAL
No power. Shuts off. The interlock relay (located on the rear lower left) contacts may be corroded and need to be filed slightly or cleaned. It's fairly easy to take apart and clean but make sure that you reassemble it the way it was. (DUH)


1050
ELECTRICAL
Erratic operation. Blinking display. The regulator board (located in the rear of the machine near the output side about halfway down the machine) is known to be bad. Xerox came out with a new style board but not all of them have been replaced. If the one on your machine is silver and blue, it's probably bad. Replace it.
COPY QUALITY
Background or black copies. Dim exposure lamp.There is a fuse inside the lamp ballast (located to the left of the HVPS inside the front of the machine) that blows occasionally. Replace.
Black copies. Exposure lamp inoperative. The ribbon cable that supplies the lamp breaks open from being flexed with every scan. Replace.
FUSER JAMS
The fuser on this machine is prone to getting air bubbles in the lube line. This causes the wick to get dry and subsequently the toner sticks to the roller instead of the paper. Check for air bubbles and purge them out by loosening the cap on the end of the wick manifold (keeping it higher than the rest of the fuser so the air will go out of it) and squeezing lube through the line until you see lube come out of the loose cap. Tighten the cap. You may need to clean the wick and manually put some lube on it to get it started.
TRAYS 1 &2 STUCK
There is a clutch assembly that is attatched to these trays via a cable in the inside rear of the machine called the nip clutch assembly. This is one of the strangest systems that I have ever seen. When these clutches bind, you are best off replacing them, but if you can't you can always clean them and try to adjust them. They each have a small screw to adjust but there's not really a specific way to do the adjustment, so it's basically just trial and error.


1065/5065
COPY QUALITY
Light copies - 924 codes.
The 924 code is light copy code. when trouble shooting this code or similar codes always start at the weakest link. The dry ink auger and it's plastic drive shaft. I know it's a messy job but someone has to do it. Pull the dry ink dispenser and check to see if that auger is twisted or bound up. This auger shaft breaks quite often. It can cause 970 codes and call for 5970 shutdowns by causing developer bead carryover, as well as a wide range of 900 series codes from. The 1065 is amazing It will produce jet black copies from starved developer. The only way to know for sure is to remove the auger.
COPY QUALITY
1065 blank trail edge about 1.5" to 2.5". I first run a dark dusting to see if total trail edge is blank. Usally a strip of print approx. 1 " wide will appear halfway down the 11" edge. If this occurs it is an indication that the lens shutter is binding or closing late. Check the lens solenoid and linkage for any loose hardware. Also check for the presents and condition of the orange washer on the plunger of the Solenoid. If needed the part number is 28E7491 and cost $9.65 from Xerox. This washer prevents residual magentism in the solenoid. It will cause this problem imtermittently.

COPY QUALITY
Copy quality on 1065 dark streaks or smudge. Does not move with reduction. Is not on the p/r belt during a panic stop, and is on the copy in a panic stop before it is fused. Check the black strip of mylar (paper deflector) just before the transfer dicor for traces of toner. If this gets damaged during jam clearing it may contact the p/r belt. Causing stearks, ghosting and smudging. Part # 55E4020.


1075/1090
Having trouble with H129/H132 faults? Manual will lead you in circles replacing patch generator or XER pcb or just plain dead end. Try running DC40-23 and 24. If 23 is over 40 and 24 is over 70 try running 23 again with the light shields off. Chances are good that the multipurpose lamp is burnt. Replace it and you should be good to go.


1090
GROUND STRAPS
If you are having problems with heatroll ground strap screws backing out, install your heatrolls with the ground strap on the inboard end (the end with the gear). The syntrifical force of the heatroll rotation will keep the screw from backing out and rubbing against heatroll bearing (which causes loud squeeks that customers love so much).


1090 - Using Blue Belts!

Keep the DSS CLEAN!! By reducing the DSS numbers in half. (Blue belt values) the tolerance window is also cut in half . (GAT set @ 80 to get a 190 reading on DC40-25 on the blue belt.) Any dirt contamination will reduce the value of GAT much faster, which is set @ 80 not the higher LED intensity of 185 - 195 set for brown belts. The other solution is to use the original brown belts which give a much wider tolerance window.


2510
COPY QUALITY
Have a Xerox 2510 that does not like running blues. Change the illumination sensor. It sets to the left of the document sensor.

BACKGROUND
Have a 2510 that has a black shadow of background approx. an inch wide running the full length of the drum. That repeats itself every drum revolution and lightens slightly with each rev. Try placing a strip of black electrical tape along the front edge of the plastic platen. Place it on the underside as to prevent document interference. It seems that light can leak in at certain angles. This also seems to keep the machine running cleaner.


5014
SCANNER CRASH
The optics clutch assy has a tendency to wear out. The shims wear, spacings increase, and suddenly the scan and rescan clutches try to drive simultaneously.
The factory reccomended mod involves resetting all the clutch spacings ( in true Xerox fashion ) but this only works if the assy is not worn out, which is usually the reason for the crash in the first place.
A new clutch assy is the only real answer, and these are horrendously priced where I come from. (New Zealand)


5017 Drum reset fuse board part number
Part number is 140K834750. Whole board needs to be replaced, as fuses to buy from electronic suppliers are more expensive than replacement board. (If interested, they are 22mA radial micro-fuse.)


5018
U7-1 Code
I have found out that the black strip of plastic above the erase lamp can cause an U7-1 code just cut It out and you are back in business.

5018/5028/5034

Flickering Control
Fliquering control console or Exposure lamp the 90% is the groundingproblem on the ground clip at the transfer corotron. Remember the front one. 

ADF FEED ROLLERS
These can be costly to replace but can be rejuvenated with coarse emery cloth. Like the manual feed system, the ADF likes to be regularly used.
MANUAL FEED
These feed rolls have a habit of hardening when they are un-used. If you persevere with attempting to manual feed they will soften and allow paper to be fed. The trick is to use the feature regularly or not at all.
DEAD MACHINE
Go straight to LVPS located under fuser. This is a common failure and should be fairly cheap to replace. Sorry I can't offer PWB repair instructions.
FUSER WEB
These webs are identical to Canon 3825 series which are considerably cheaper.
FUSER ROLLERS
If you have trouble sourcing these rubber coated rollers, replace them with teflon coated. Your local recoating specialist should be able to help.
In some machines you may have to adjust the nip pressure to avoid creasing or other fuser problems.
FREQUENT J1 CODES
Frequent J1 codes, or J1 codes shortly after Dry Ink Cartridge has been replaced. Manual tells you to check for bridging in the dispenser and to replace auger. Before you do this remove dry ink cartridge set cartridge on a drop cloth upside down and slide off the access plate. turn the large black gear and check to see if the feed spring in the Dry Ink Cartridge turns. I have seen many bad cartridges especially in the third party and refilled cartridges. If you refill the cartridge the spring will come off if the gear is turn in the wrong direction. I have seen four bad cartridges in a row from third party supplies in one account.

P/R BELT REPLACEMENT
Something fairly new to this product is a third party blue belt. As in the case of the 1075/1090 blue belts they require a lot less light to produce the same or better copy as the OEM. So when installing one for the first time adjust the exposure lower (I have found that most machines will run at a 1 or 2 setting in P 9-62) This will save a call back for light copies and will save on toner consumption.

DH BELTS
5018, 5028, 5034 RDH and ADH feed belts become slick from wear oem recommends cleaning this belt once. After one cleaning the belt seems to cause misfeeds shorthly after cleaning (dreaded call backs). A product that I have used in the past for temporary fixes on different feed rolls and belts has been Elmer's Stix All a combination of RTV and glue. The small tube fits easily in the tool box. For best results remove the feed belt clean throughly with an alchol base cleaner. Apply a liberal amount of Stix All to the clean dry surface, allow to dry for approx 4 hours ( completely cures in 24 hours ) before use. I have found that a properly treated belt will last 50,000 copies and more. Making this more of an permanent fix than a temporary one.
ELECTRICAL
Intermittent flashing display. Spontaneous feeding or other logic problems. Try replacing the copy cartridge. There may be a problem with the photoreceptor ground inside the cartridge. You can check inside the cartridge for staples or other debris, but usually if you can sell the customer a new cartridge, that is usually best.
COPY QUALITY
Lines at the top. Poor resolution. The mirrors are held in with small plastic clips. These clips break and the fixed mirrors may not be held in firmly causing copy quality problems. If you work on this machine frequently, you might want to keep some of these handy.
Intermittent light CQ and background. Check that the block that holds the corona (or as Xerox calls them, corotrons) contacts in the front of the machine isn't broken. The mounts that hold the block onto the copy cartridge carriage sometimes crack and the ground and charge contacts can't make sufficient contact with the copy cartridge. You may be able to epoxy the parts back together, but as usual you will probably be better off just replacing the entire carriage assembly.


5028 Family
On every visit to a 5028 family mach. enter diagnostics, select code 8-62 [bypass feed "ON"], take 10/12 8.5 by 14 inch paper in your right hand, wet the other end of the paper wad with film remover, or isopropyl or other alcohol and insert the wad of paper into the by > pass feeder while hanging on to the other end. When the wad is in place push the start print button and allow the bypass feed rolls to run on the top sheet of paper that is wet with the alcohol Remove the top sheet of paper and repeat the steps again, until you can feel the increase of the pull of the feed tires on the paper. No need to take the system apart to clean the tires, and you can possibly prevent a call back for bypass misfeeds.
ADF MISFEEDS
One of the more troublesome components on the early models is the ADF Prefeed mechanism.  You can groove the rollers for some quick fixes, but the real problem may be in the clutch.  Remove the clutch, disassemble the gear from the main body of the clutch.  Remove the snap ring that holds the metal disk onto the gear. Take a scotchbrite pad and scrub that metal disk until all the grime, rust, and residue are cleaned off.  Don't use cleaners, they don't work.  You can use a deoxidizer, but the disk must be clean and dry when reassembled.  You'll know that the clutch is slipping because the roller beneath the stack force lever doesn't turn or the rollers are easily stopped when applying pressure to them.  Clean the rollers and replace the retard pad.  Finally, if all else fails, replace the prefeed module (last resort).

FUSER NOISE
Check to see if the fuser heat roll has end play. If it will move from front to rear inside of the bearings, replace the split collars. There is a metal one for the rear and a plastic one for the front. Make sure that the pressure roller has not derubberized on the rear end. Finally, adjust the load arms to specification with the parts mentioned. 12 on the rear and 15 turns down on the front. If the fuser drive gear is not worn out or dirty, you should seriously consider those split collars. The bearings usually squeak or grind, but they don't thump. If you put new collars on and you still have end play, install the bearing fallout washers on the drive gear side only. As these bad boys heat up, the frame of the fuser expands and your heat roll gets a little play in it. Installing the fallout bearing will take up the slack.

HALF RATE MIRRORS
Sometimes the half rate carriage (mirrors 2 and 3) can become loose in the plastic housings. If the plastic clips that secure the mirrors are missing, long plastic ty-wraps can be used to hold the mirrors in place. This will save you $$$ on a new half rate assembly. XEROX Models 5018,5021,5028,5034,5126,5321,5328,5334

LIGHT COPIES
If light copies are still occurring after following the
light copy rap and developer carryover rap, make sure you follow the
electrostatics rap. If this still yeilds no results, dissassemble the
developer housing and check for a clogged ink dispenser or clogged
developer housing. Some company out there is refilling ink cartridges
with straight developer. This is causing developer carryover and
ruining the developer module. After cleaning the developer and ink
dispenser, be sure to run p 9-5 tone up to refill all augers with ink.
Discard the toner cartridge and inform customer that their source for
ink should be reconsidered. Not in manual.

FEED HEAD
I encountered this problem while recycling tray 2-3 feed heads. The
feed head can be rebuilt off site for reuse to save onsite time for
those heavy queued up days. A feed head and the drawer may be out of
alignment when doing this which causes the paper to feed at a posistion
where it picks up toner from a non erased area of the PR belt. Adjust
the drawer stop screws in or out until the line is gone. This line is
often mistaken for optics skew, but it usually occurs after feed head
replacement.

U7-1
Intermittent U7-1 is usually the copy cartridge, but not always.
Checking the voltage at TP2 and PJ102-20 should give you 25vdc, but
replacing the main board may not always be the fix if you aren't getting
25vdc there. The driver board relay switch is actuated and deactuated
by a high or low from jp102-20. Replace the driver board prior to
replacing the main board. Many of the older style driver boards have
become defective due to heat. The new style board has a larger ceramic
resistor where the old one was failing. If a new driver board doesn't
cure this problem, and a new cartridge or belt yield no success, then
the problem can only be in the main board. You can always remove the
driver board if that fix doesn't work. A main board takes a little more
work to install.

FAULT CODE
Also check the pre-charge erase lamp located above the print cartridge, this will give a U7-1 code if it's open.


5028F
HEAT ROLLER REPAIR
Here is a little experimentation you can try if you are hesitant to spend the big bucks on  a new heat roller when the stripper fingers wear the rubber coating off.  A line will appear on the copies when the rubber coating has been worn off by the stripper fingers.  Get some high temp red or white Silicone rubber sealant. Apply the sealant to the roller and smooth it out.  This takes a little patience and time.  Let the sealant dry before installing the roller.  This works best with small nicks and cuts that aren't the result of excessive wear.   Again, this is still a little experimental, so don't be disappointed if it doesn't work perfectly the first time.  I have had limited success with it, but it does work when the marks or gouges are small and can be easily repaired. Best results are had when allowing the sealant to cure for a couple of hours.  Reuse that roller or try to on the next machine you have to replace one.  Can potentially save you $$ on parts costs.


5028, 5034,5334,5328 5626,5624,5830
SKEW
Skewing not associated with optics is caused by a worn lower baffle. If the guide ribs on the baffle are worn flat, replace it! Replace the upper baffle with the lower for even wear and correct pinch pressure. When removing the main feed assembly, be sure to clean and lubricate the tray one feed clutch and registration clutch to avoid call backs for noise.


5046
ELECTRICAL
Intermittent flashing display. Spontaneous feeding or other logic problems. In the rear of the machine on the output side, sometimes the white plastic cover over the control and driver boards comes in contact with the plug jack near the clip that holds it on. (Take a look and you'll see it if it's pressing on it) You can just cut the corner off the cover and you should be o.k.


5046/5047/5335
ROLLER RECOATING
When sending out your fuser rolls for recoat. Have the recoater use yellowish brown (Hypolon) material. It's used on the 9500 fuser roll and some third party rollers for the 1065. This material is tougher and last longer.
COPY QUALITY
Many times after the machine adjusts copy quality the copy is over exposed and over toned. The pot R134 on the Driver PWBA board under the white cover on the back panel on the left controls the exposure lamp. I have found that by adjusting the exposure the copier will run cleaner, and dev. and PRs will last longer. To adjust 1st check for 10.2 vdc at PJ2 pin 16 (connector between driver and control PWB's) Then adjust so that the .1 gray scale is slightly visible or just erased without effecting the.2. The .2 should be completely visible. I will follow the adjustment with the long setup procedure (turn on don't use reset button) and recheck. I have added this to my final check out procedure after a couple thousand copies the density does back off alittle causing a readjustment on the call.


5113
Problem:
   Copies are lighter on the backside. Overall copy density is weak.
Solution:  Make sure the developer unit is camming in all the way towards the drum.  A simply way to check is to push on the cartridge towards the drum, check to see if it moves closer, and then check copy quality.  For the backside, remove the back cover and push on the rear dev. pin.  If that is the problem, remove and clean the dev. cam unit.   Copies are lighter on the backside. Overall copy density is weak.
Solution:  Make sure the developer unit is camming in all the way towards the drum.  A simply way to check is to push on the cartridge towards the drum, check to see if it moves closer, and then check copy quality.  For the backside, remove the back cover and push on the rear dev. pin.  If that is the problem, remove and clean the dev. cam unit. 
 


5113
When doing a conversion from a Xerox 5113 to a sharp 2114, after swapping out the main board , if the adf is not detected, do simulation 26 sub code 1 and set it to 1. Also if the R/E does not work, do simulation 26 sub code 6 and
set it to 16.


5113/5114
CONSUMABLES CROSSOVER
These machines are the same as the Sharp 2114 and 2214 machines, but cannot
use the drum or toner for the Sharp version without being modified.
The toner mod is very easy, just remove the alignment peg from the front
frame of the machine which determines which toner cartridge will fit in the
machine, and now you can install the much less expensive Sharp toner in the
machine.


5205 / 5210 / 5220 / 5222
RUNS CONTINUOUSLY
Machine sits idle when print is pressed (may be clicking)... If the toner light is not on but the machine sits idle and continues running, the machine may simply be looking for toner. Sometimes it takes a long time before the toner light actually comes on.

TONER LIGHT
Toner light stays on after new cartridge is installed... After the machine is finished cycling, if it still calls for toner, turn the power off and back on for the second cycling. New toner cartridges contain fresh developer which often reequires more toner. This is true of OEM as well as reconditioned cartridges.


5307
L code
The L code on this machine does not always mean a scanner clutch problem. The main board will cause this error code also.


5314
EDGE ERASE
The manual is slightly flawed here. There is an extreme caution that
needs to be inserted. When adjusting the edge erase on the copy
cartridge charge scorotron, you must remove it. When reinstalling it,
make sure that it is put together correctly. Removing the front cover
to detach the scorotron causes the toner auger gear system on the
cartridge to become loosened also. Reinstalling the scorotron without
ensuring that all parts are fitted can result in gear breakage within
the auger assembly. End result is new cartridge due to binding and
ratcheting noise from broken auger.


5312/5313/5314
MULTIFEEDING
Multisheet feeds can be prevented by installing the paper guide blocks.
As paper is fed, the paper guides can slip until the paper guides do not
touch the paper in the tray. In addition to the paper guide blocks,
install a buckle pad on the side edge paper guide near the rear of the
guide. The velcro like pad can create enough friction to hold down
sheets below the top sheet without causing misfeeds. The part number
can be found in the 5328 or 5028F manuals. Inexpensive fix not found or
prescribed in the manual.

NOISE
Squeaking noise is caused by a rubber tube on a lever in the back of the
developer module. The rubber tube is rubbing against the developer
housing. The lever may actuate the metering blade as the gears rotate.
Use some kynar powder or a very small drop of 70p95 turbine oil on the
rubber tube to lubricate it. Inexpensive fix not found in manual.

BROKEN GEARS
Broken gears on registration roll. The corotron was not seated
properly. when removing and cleaning the corotron, be very sure that the
rear end of the corotron is seated. The gears which transfer drive to
the registration roll will strip if the corotron is not seated.

NOISE
A very loud grinding noise will occur if the copy cartridge toner auger
becomes disengaged or clogged with toner. If you are brave and can be
certain of not causing a mess, you can disassemble and clean.
Otherwise the noise is fixed by replacing the cartridge.

OPTICS SKEW
The optics on these bad boys can be very tricky. The rear cable is
often out of adjustment. The baseline procedure for the optics in the
manual says to ensure the cable eyelet is secured in the bracket. Very
often, this cable eyelet is not secured. After loosening the bracket
and installing it through the eyelet, some adjustment to the full rate
carriage may be necessary. The manual takes you through a rather
tedious task of loosening things you shouldn't mess with. Use the two
5mm allens through the frame to half rate carriage and making sure they
are perpendicular, loosen the cable clamps on the full rate carriage and
adjust until the full rate carriage tabs contact the allen wrenches.
Tighten and check. Readjust as needed. Loosening the pulleys on the
shaft is not necessary and will only make things worse.


5318 / 5320 / 5322
H6-2 CODE
A recently produced retrofit package has made the ADF/DM LVPS obsolete
in the 5320 and 5318. A wiring harness eliminates PS13 in both of these
models. As of Feb. 1997, the ADF/DM LVPS has been eliminated from the
5322 also. The difference is that the wiring harness for the 5320 and
5318 will not work. A new LVPS to replace the PS12 processor LVPS must
be ordered. The new LVPS kit will eliminate PS13 and replace PS12 with
a more robust Power output that will operate duplex, HC feeder, and ADF,
in addition to the other devices in the processor that required DC voltages.
An error code of H6-2 will lead you to replace PS13. The display says
that the ADF needs service. The error code is H6-2. The RAP will
instruct you to ultimately replace the console, the main board, or the
ADF board. This is erroneous. The reason the ADF is not functional is
that there isn't 24VDC coming from PS13. This problem has been known
for some time now, but the latest manuals do not reflect the changes.


5328
JAMS
Paper jams when tray 2 is nearly empty. The cause is a bad spring
beneath the tray plate. Replace the spring. You may also need to
replace the front paper guide and retard pad. The 5328 front guide is
not spared. The 5028 front guide works just fine. Be sure that a
buckle pad is installed and that the pinch rollers have good tension on
the take away roll (all three). This problem is characterized by the
front lead edge corner becoming folded over. The paper is getting stuck
beneath the snubber because the spring tension is too great. Other
jamming problems will not have the corner of the paper folded over like
this one. This problem is not described or prescribed in the manual.


5328 5334
I work in Xerox and all the Web's in 5018 & 5328 or 5334 are the same. The only difference was that 53's web's had more oil than the 50's fam. But not now.....
PRESSURE ROLLER
Both rollers are different than 5018's. Really. Pressure roller is different-and does not last long-causes wrinkling on any size paper, especially longer ones. Heat roller dimentions same, coating material different. Don't know yet if 5018 HR works well enough.

WRINKLING
Experiencing paper wrinkling only at the Fuser Assembly. Discuss matter with an authorized Xerox Agent. Found that the Fuser Roller , Fuser Web Material, Pressure Roller for a Xerox 5018/5028/5034 are not the same as a Xerox 5328, The Xerox 5328 Fuser Roller, and Pressure Roller are Slightly less in diameter than the Xerox 5018/5028/5034 along with the Fuser Web Material the shaft will not fit the Xerox 5328 Plastic shaft. Caution be certain you get the correct part's for the Xerox 5328, The only source available for these part's were Xerox Themselves, Believe me I've checked around and no luck. You'll also Experience a wavy effect on the paper as well.

WRINKLING
Wrinkling of legal size paper can be cured by either replacing the
pressure roll pn 22k48610, or adding a fallout washer to the heat roll
on the gear side only. Check the fuser or heat roll for endplay. If
movement is found, add washers until movement is minimized. Not in the
manual. Part number can be found in 5028F manuals.

DELETIONSFlame type deletions not associated with copy cartridge. The pressure
roll and heat roll should be replaced. Some of them are found to be
slightly out of round or will have uneven surfaces that will cause poor
fusing. Excess ink usually is removed by the web. Look closely at the
web material for excess ink. A dark colored material indicates poor
fusing. Not in the manual.


5328, 5321, 5334, 5021 Unified drive
NOISE
Knocking noise frequently occurring. Clean the exhaust fan area, fuser drive gear, and any toner buildup with film remover. Replace the drive belt if worn. Increase the tension on the idler roller by moving the spring to the top of the mount from its slot in the mount. Install the contamination filter in the exhaust fan to catch excess contamination. This filter is often referred to as the Ozone filter. The optics filter
and ozone filter are two different types. Ozone filters should be replaced as often as a copy cartridge is rebuilt or replaced.

Supplemental tip Re: Unified Drive:  The tip about the ozone filter is incorrect. The only time the ozone filter should be used is when the customer complains of an ozone smell.

5334
COPY QUALITY
Blurred lead edge of copies on the standard test pattern. Check the
tension of the lamp power cable. A taught cable will cause the half
rate carriage to bind at the beginning of scan. Pull the cable gently
at the end closes to the drive motor. The cable should sag slightly
without causing interference with the carriages. Not in manual.

U9 CODES
The 5334 came out with a new style optics fan. It isn't better than the
old style. It will appear to work fine when you check it, but during
stressful operation, the fan will lock up and the overheat fuse will
blow. Replacing the fuse only will bring you back again. Orde

JAMMING
Tray 3 or duplex jamming. As found in the 5034, the tray three retard
pad and feed roller become contaminated with fuser oil causing misfeeds
or multifeeds when duplexing. Replacing the feed roller and retard pad
are Xerox manual fixes. The same retard pad feed roll problem is
occuring in the 5334. The 5334 now has a belt to replace the roll, but
the retard pad is still becoming contaminated. Clean the feed belt with
film remover and replace the retard pad. Cleaning the retard pad lasts
about a day. The HFSI maximum feeds is not being reached for this part.


5614 SDF
This machine is identical to the Sharp version (don't know the model).
The SDF works intermittenly or not at all. The wiring harness that
controls the clutch for the feed roll runs beneath the motor. Remove
the motor and check the wiring for pinched wires. Replace the wiring
harness or splice the wires (brave souls only), and then add black
electrical tape to the wiring harness until the tape covers the wires
beneath the motor. This makes the motor more difficult to install, but
it works. This is not in the manual.


5614
E-1 CODE
E-1 paper stops at fuser exit switch.   Problem can be one of three things:  Main board, switch, or wiring.  Enter 7-1 in diagnostics and actuate switch.  If display shows actuation, replace the board.  If display doesn't show that switch is being actuated, disconnect the switch and check continuity from the switch to the main board and CNH 9 and CNA 26 and CNA 16  If there is no continuity, through any of the three wires, check the wiring for an open.  I have found that this wire runs behind the LVPS and opening and closing the clamshell eventually pinches the wires in half.  Repair the wire.   Replace the switch if all wiring is good.

FLASHING EXPOSURE LAMP
The problem shows up as dark background bands. If the lamp is burned, replace the lamp. When replacing the lamp or fixing the problem, bend the metal contact on the rear end of the lamp so that it is extremely tight. The metal contact is sometimes slightly larger than the hole in the ceramic insulator of the exposure lamp. You might try filing the contact point so that it is a little smaller and more pointed allowing it to fit into the end of the lamp to make contact. Before performing any maintenance on the optics be sure that the machine is turned off and unplugged. There is live voltage in the lamp circuit with the machine plugged in.

TONER
Sharp 2114 toner fits Xerox 5614 machine perfectly but Xerox sells this toner (same toner) for 3 times as much.


5624
BINDING CLUTCHES
Some of these machines are being shipped with a green grease on the
clutches. I think this was initally done to prevent rust while in
storage or shipping. Remove the paper tray drawer, and tray two /three
feed head making sure you hold down the release lever. Remove the
clutches and clean them with film remover. Reassemble and lubricate
with a very very light coat of 70p95 turbin oil. Excess oil will
collect paper dust and you will get called back in time.


Xerox 7041/7042
*NOTE* This can only work on the 7042 machine *NOTE*Skewed prints or sometimes even skewed feed caused by Laser Assy. There is a foam pad on the bottom of the Laser Assy. that will begin to rot and soften with age. Before replacing the rubber/metal rollers, try taken the foam pad off if it feels softer on the outboard side. As it rots and it softens, it will cause uneven pressure in that area and may cause the Laser Assy. to be out of level ever so slightly. Simply pull it off and use Scotch Brite to remove excess and try it out.  It has worked for me a few times. You cannot remove the pad on the 7041!!! It is there for as a fix from the factory, but on the 7042 it is optional.

Sharp Z800/Xerox XC 800 series 
Doc. feed jams
Having consistent doc feed jams on any of these series machines. Check the clutch dog arm (plastic) in the clutch assembly. The arm is mounted on a plastic pin, which breaks and leaves the arm dangling. You can remove the assembly and replace the broken pin with a small sheet metal screw. Works good as new and probably won't break again.



Friday, February 13, 2015


Ricoh Copier Tip general:  By Reliable Copier Repair 773-671-0545
For more current information, use the 



Cleaning Reg. Rollers
I read with amusement how someone was putting forward a tip for cleaning Ricoh 2260 reg. rollers by immersing them in boiling water.  Save a fortune on electricity bills and skin grafts by using WD40. It’s also great for polishing OPC drums, curing lumbago and ingrown toenails. 
  
General Toner Density Control Info for Older Ricohs
For techs not familiar with the Ricoh TD control system, problems can be introduced into the machine by trying to tweak one section to compensate for a problem in another, which is why so many techs without Ricoh ( or corresponding relabeler) training think they work by Black Magic. In a nutshell, the machine monitors toner density by developing and sensing a
patch on the drum, via a photo-reflective sensor arrangement. The patch is located under the original scale. The sensor is located next to the drum (precisely where depends on model). For it to function correctly, exposure, charge, development, erase, and cleaning must also be functioning normally. The condition of the optics(including the patch) must be clean. The charge corona must be clean, serviceable, and adjusted to spec. The drum must be serviceable. The developer material must be serviceable. The adjustment of the TD sensor must be 4 vdc, + or - .2. If someone has turned up the charge corona output to compensate for a weak fill, the following will occur: machine will detect a normal toner density on the check cycle even if it is under-toned, due to the higher than spec charge and not add toner. The developer will crash prematurely. On machines like the 6620/5590 and others, Service Program 33 will alter the "patch bias". This can be used for some extent to compensate for a worn drum, etc, but only if you fully understand this type of TD system.  Do not ever tweak the charge corona for any reason, unless you have a corona current tool for your model of machine. 


GENERAL
Without a doubt the condition of the "entry-seal" (or recovery-blade or whatever you like to call it) on the front of the cleaning unit of most of the Ricoh's......such as 4490, 5560, 5590 etc is important for preventing premature drum-wear.......as well as preventing spillage onto the sep-corona.  It's better to replace a relatively cheap entry seal than a drum (especially if we are paying for it!)    Use Part# A0089503 for 5560's *and* 4490's  As the polyurethane hardens and deforms, it traps dirt particles between the drum and the entry seal. It is these particles that mostly abrade the drum.

Refurbishing Old Rollers 
We have had enormous success with having some hard to get rollers re-coated with polyurethane. E.g. Separation rollers on the paper feed units and also document feeder rubber rings (inverter roller) on Ricoh 7770. Also old rubber coated drive rollers on Ricoh 6750 Document feeder. We have arrangement with local supplier to re-coat hard to get rollers usually cheaper than buying the OEM part and they last MUCH longer.


GENERAL QUALITY PROBLEMS
When servicing these models never forget to clean the third mirror. You know the one above the drum. It may look clean but that is the mirror that gets the most ozone fumes from the chargers and can and will cause copy quality problems that will lead to callbacks and headaches.

Aficio 200
Having problem's with removing the opu? Well 1st make sure that the copier is in the ready position... the m/c roller will not be disengaged unless it is in the ready position... then go to your sp modes and release... can't recall the sp right now but it's in their... work's 9 out of 10... of the sp doesnot work you have to pop off the fly wheel and manually disengage it from their...


Aficio 2003
Leaking oil very heavily from fuser? Ricoh's tech bulletin say's to remove wick's and replace the oil sending unit & hose; but I have over 100 2003,2103 &2203 out there and all I have done is removed the wicks and they work fine...did have to update a few oil sending unit's though...also with the new hot and press roller's make sure you don't mix and match you will screw up your nip bandwidth big time! Must use new with new! Good luck...


Aficio 2003, 2103 or 2203

Problem: 
Intermittent void areas extending width of the copy from front to back.
Solution: Replace the lube bar for the clean roller.


RICOH RIPRO M10

PAPER FEED
M10 paper feed tire can also be replaced by the Ricoh 3050 tire. This tire general works better because it is slightly larger.

M100
Bipass feed roller should really be the correct diameter. Fitting a larger dia pick-up roller from say a 3020 places extra drag on the rubber pulleydrive belt and when this starts to slip there is no cure except renewing the drive belt. Minolta feed rollers are absolutely ideal for the m100 bipass feed.

RIPRO JR. /M-5/LR-2
If the copy paper keeps jamming right in the turn-guide, check the two
little white pins that the paper cassette sits on. They tend to wear
down from sliding the cassette in and out and the cassette will then sit
down too low. Try shimming the cassette so it sits up higher.

2260
Misfeeds    
Frequent, random, annoying misfeeds from Ricoh 2260 main tray primary feed can often be permanently cured by washing out the one-way bearing which is inside the primary feed roller.  I use mineral turpentine to dissolve the old lubricant and rubbish which gets into the one-way bearing. Also it's a good idea to do the same trick to the wrap-spring clutches as a
preventive measure to improve reliability.  But you *must* lubricate the wrap-spring with graphite loaded grease. (I much prefer the thinner grades of grease (less viscous), as they take longer to dry out and go sticky.  Also while we are talking about Ricoh 2260, M100 etc. I must thank the guy who recommended boiling rubber rollers in water to restore flex and
friction.  I found this to be the best method of improving registration roller grip.

E71 CODES
The center of the Image unit drive pully strips out and cracks. Located
in the back center upper half of the copier

VOIDS
Check that the copier is latching completely down. The frame latches on the bottom half of the copier are plastic & the non operator sides breaks easy causing a small void on the copy.

3013/3715
Very loud scraping noise intermittent. Change cleaning blade for drum. 

3020/50/60
ERRATIC DISPLAY
If the display lights go off & on at will, replace the thermal fuse or clean the corrosion of the fuse. I have no idea why but it does work.


3050/3060
BLANK COPIES
Blank copies on these and the equivalent Savin 5015 series copiers, with the charge corona wire in tach. The problem is the small 24 volt relay in the back right hand corner of the machine. The contacts become burnt from constant operation.Also the contact arms get hot melting the plastic holder arm to the contact arm. Clean contacts with burnishig tool or fine sand paper. This same relay can cause intermittent blank copies, code E2, and jamming in the transport area of the machine.


FT3113/3313
Noise while making copies
Check toner supply clutch. Eithor lube spring in clutch or replace whole assembly.

JAN AT OR BEFORE REGISTRATION
We have found replacing the relay clutch & registration clutch at the same time usually will fix the problem.


3313-3713-4222, etc.
Toner Lockout
The problem with this is that the machine is over-toned. DON'T DO SP-99. You will have to do a complete pm including the drum if you do. Usually the main culprit is the corona wires or the developer failed prematurely. The way to get yourself out of the door is to turn the machine off, clean the entire drum cavity (corona wires and sensors), find the main board (in rear of machine), find the connector for the toner clutch and unplug it. Then turn on the machine and let it cycle. You may have to do it 10-15 times but it will eventually get the excess toner out of the developer and satisfy itself with a good patch reading. This is only a temporary fix. It will probably come back shortly although I have seen it go 10-15k. Then you can come back change the developer with OEM, and the corona wires and grid. If it is close to the pm, go ahead and do it at this time with an OEM drum. if it is only about half way through the cycle the dev. and cor. wires should fix it for 20-30k or till pm time. Also do not forget to plug the toner clutch back in!!!!!!!!


4060/65 ETC.
Oil a pain in the neck? Of course it is. Eventually I remove the oil supply system completely. Get rid of the oil blade and the wicks. It is important however to insure a large lead-edge void maybe half inch. I do this by taping a white strip of paper on the under side of the glass. If you're neat, it can look almost OEM and not leave any copy marks. 


4000/5000 SERIES
COPY QUALITY
Copies. The switches on these machines can be defective. Sometimes you can clean and lubricate the contacts with conductive grease but you are always better off replacing the switch.


4410/30/80/90
Replace friction pads alot and adjust the cam for paper feed very carefully. It pays to run alot of copies before you leave to make sure its not jaming or feeding to many sheets.

4220/22
COPY QUALITY
If the copy quality on these machines goes light and the density is poor don't waste your time replacing the developer the problem will come back. Claen the optics and reset service code 94 . You do this by accessing the service modes them punch in 94 enter, then 1 enter. You will have th adjust sp 48 for exposure and 56 for auto exposure after this but it will bring back great looking copies.


NEW TYPE 411 DEVELOPER
Ricoh introduced a new type 411 developer for these two copiers. The previous 410 developer would only last about 20k. The new 411 is lasting up to 50k. Some SP modes need to be readjusted for the new developer.


4418-4222
PAPER JAMS AT REG. ROLLER
I had a jam problem just before the reg. roller from the top tray. The paper was hitting a bur on the reg. Sensor flag causing the paper to stop. Remove the sensor and scotchbrite the flag to clean off the bur.


4410
S/C 11
When the customer tries to lighten the copies they push the light button and they get a S/C 11. This is usually a lose con- nection at CN204 on the main board or CN3 on the optics board. Clean and reset both. Has always fix the problem for me.


4418
OVERTONING
Usually happens when toner is installed.  Keeps on pumping toner into the dev even though Vsp is less than 10% of Vsg.  Remedy....remove black plastic arm at back of toner tank. 100% cure of problem.

The toner-end sensor behind the toner tank recognizes when toner tank is getting empty and engages toner-add clutch to replenish toner tank. *But* this also often adds bulk toner into the developer unit.....leading to excessive toner density.
This function over-rides the Vsp/Vsg density ratio.

Remedy: Take off the little plastic arm at back of toner tank so the toner end-sensor thinks toner tank is full.


4415, 4418, 4421, 4215, 4220, 4222

COPY QUALITY
These machines have no mercy if you don't level them. Running unlevel will cause the developer to wear out early. It will also cause light copies & uneven copy density.

FUSER GEARS
Order lots of fusing unit gears for these machines! There are two gears that go out all the time. You might want to add the upgraded shield to help the new gears last longer. If you need any there cheap! About $2.00 each. We have plenty, just e-mail with quantity.


4415, 4418, 4421, 4222 ADD TONER LOCKOUT
(SAVIN 9150-9180-9210-9020-9022)

A serious problem with this series. Root cause can be defective charge corona, grid, drum, drum grounding bearing, etc. Many times the only way to get rid of the add toner indication is to clear the memory. SP 99, dip sw on main board, 3 & 4 must be on. Select sp 99, by pressing 99, enter. Magnification window will blink. Select "1", enter. Machine will clear the RAM. You have now lost all data such as drum age, adjustments such as lamp voltage (sp 48), vertical mag, lead edge, erase, etc. all will return to default. The only real concern is drum age. Since machine
is tracking opc wear, it will now think it has a new drum installed. Best to set sp 33 to '1', which will help prevent overtoning in the first 1k copies or so. After making absolutely sure that the charge wire, grid, drum are all servicable, you should also check the output at the charge/bias powerpack. Rig meter to read milliamps, connect in
series between main output and corona connector. ADJ for 400 microamps with main charge pot (is identified). Reconnect, configure meter to read VDC, 1500range. Check out put at Grid connector on board, and adj for -920 volts. Both of these adjustments are made by turning on the corona with sp9-2. The vr's on the board are marked. This adjustment is critical, NEVER TWEAK THE CHARGE OUTPUT. PERIOD. Having completed all this, after turning power off/on, the add toner light should go away. You still have much to do. Remove toner ctg, and vacuum hopper. Dump developer, and load fresh. Install dev unit assy, set service programs, and insure sp 54 is 4 vdc, =or- .2, preferably on the high side since the reading drops when the sensor gets dirty, usually. Set sp 65, and begin developer self-calibration. By holding down the 0 key, you can observe both vsg & vsp. Normal range is 4 v =or-.2 for vsg, and .20 to .50, roughly, for vsp with fresh developer. IF THE READING SHOWS AN ABNORMALLY HIGH VSP, THERE IS STILL A PROBLEM, DO NOT LOAD TONER UNTIL YOU HAVE CORRECTED IT, OR YOU WILL PIG OUT YOUR FRESHLY LOADED DEVELOPER. You cannot get cheap when it comes to drums and corona wires on these. If in doubt, change it out. Further problems could be the drum bearing, which supplies the drum grounding path. They are cheap, replace it if there is more than about .2 vdc between the drum and ground during a copy cycle. After sp 65 has run it's required copy cycles, check sp 64. Best readings are 0 or 1. If you see a 4 you may be in trouble. On some trouble machines, you may have to reclear the ram (sp99), and NOT
run sp65, this will select "0" on sp64, a decent ratio. Once you are satisfied that the vsg/vsp ratio looks normal, by monitoring sp 55 in free run (dip sw 1 on), with white paper on the exposure glass, only then add a toner cartridge. Set a test chart, adj sp48 (exposure), followed by AID (sp56) to 2.5 v with vr on main bd (always adjust 56
with several clean white sheets of paper on the glass. All adjustments to be made ONLY AFTER ALL OPTICS ARE CLEANED, INCLUDING THE MIRROR ABOVE THE DRUM, AND THE COLOR FILTER. On early machines, ensure that the old dark green filter has been replaced with the lighter green filter. My apologies for the rather scattered order of this tip, but the high incidence of reports of this type of problem on the listed Savin
machines and Ricoh equivalents made me feel the need to post the info as soon as possible. Direct any comments to the Free Speech page, and I will amend and edit where necessary. Peace.


4421
E2 CODE
E2 code displayed moments after power-up. Could not find this code in Intravia's 5th edition. Replaced fuse fu-101 on accessory PSU located at upper right looking at rear of machine (3.15A mini).

E22 code
The following is a tech tip regarding code E22 on a Ricoh 4421 copier.  This thing drove me crazy for many hours.

Normally code E22 (optics problem) appears because of malfunction in the scanner motor or the main board.  However, an intermittent  E22 can be caused by a cold solder in the power supply board, located in the back of the machine, in the top right area.  There are 2 power supply boards mounted one behind the other.  Move the connectors while the machine is running to see if you can recreate the problem.  It is possible to run 100 to 300 copies without a problem.  These boards can get very hot and will start malfunctioning only after the machine has been working for while.   Good luck.

4430/4490
SC32
Happens when paper reaches registration roller. Usually cured by polishing ID sensor's edge connector with fine metal polish.  But sometimes it simply won't go away. Clean edge connector socket contacts and would you believe it the small 5 pin plug/socket close to the edge connector socket.


4430 & 5560
FUSER JAMS AT FUSER ENTRY
Frustrating jams on A4 (landscape) for no obvious reason at fuser entry can often be due to a small remaining static charge left in the paper after it leaves the drum. (This won't happen on A4R because the paper is longer than the distance between the registration roller and the fuser rollers). After you have checked all the usual things like the transport belt is turning properly and there are no scores or bumps on the fuser entry guide plate, it is definitely a good idea to operate the machine with the door open (safety switches closed) and the transfer/separation corona in the DOWN position, to see if you can see any blue flashes in or around the corona end blocks. (Don't put your hands inside when the coronas are on). Leakage of the Separation current to ground causes the paper to retain some charge and hence it may stick to the transport bed after leaving the drum and before reaching the fuser rollers. Hope you benefit from my discovery.


4480
NO FUSER WARM UP
After checking the heater lamp, thermofuse etc. and finding that they are all good, but still no heater lamp operation, go to the rear of the machine in the top right hand corner, standing behind the machine. There is a fuser control board. Remove it and check the solder joints on the large connector and the triac, resolder as needed, If this does not work, you more than likely have defective fuser control board.This is a very common Problem.

JAMMING ON THE TRANSPORT UNIT
The transport roller bushings are gummed up, The transport unit can be removed by removing the two screws in front and the 2 pin connector in the rear of the transport unit. Take apart and clean the oil light bushings. These bushings have pores and can be lubricated by laying ontop of one of your fingers and filling with oil, then pressing the bushing between your fingers until you see the oil pouring out of the pores.

CODE 24
Intermittent code 24 after pressing the print button. After pressing the print button, the scanner appears to scan, the print switch turns red for a second, and the machine goes into a code 24, which means that there is no scanner home position signal. You may also get other weird codes. The problem is usually your coronas, especially the separation corona. Try unplugging or turning down the separation corona voltage. But all the coronas need to be set to factory specs, for good and proper operation, to keep this machine from giving crazy codes.

PHANTOM FEED
If the machine after power on starts to feed copies all by itself, most likely is the thermistor arcing, causing short to the main board. replace the thermistor and your problem will go away.


Ricoh 4480 & 4490
STRANGE SERVICE CODES
These machines will show strange service codes when there is nothing wrong with the component (ie: fuser, main board, exposure, etc.). Always resolder connections on power supply board located in rear lower right corner. Push switches (front door interlock) and two relay's behind logic board can also be replaced or contacts filed.
CORONA ARCING
These machines are notorious for corona blocks and harnesses arching (as are most Ricohs). The cure for most intermittent problems on the 4480/4490 series is to completely tape the wiring harness on the transfer/separation corona unit with high dielectric tape (most supliers carry it). Also tape the metal parts of the T/S unit that comes in contact with the end blocks.


5006
BLANK COPIES, JAMMING FROM ALL TRAYS & REVERSED IMAGES
Check to see if the grounding screw on the front side of the drum unit is properly seated and making good contact to the frame. This may cause arcing which scrambles the main board.


FT-5520
JAMMING / BLANK COPIES 5520,60, 5010
The cause of this problem is the door switch in the front of the machine. The problem switch will have 2 sky blue wires and 2 black wires connected to it. The contacts get burnt and need cleaning, switch can be popped apart. This switch is in line with the charge and separation coronas. Blank copies because of no charge, Jamming because of no separation.

FLASHING WRENCH
First clean the interior of the machine and check the I.D. voltage and set it to 4.0 volts, then monitor the erase lame ass'y, by watching them as the machine runs in normal operation. If the middle bank of the erase lamps do not light up, You have a bad erase lamp ass'y, not allowing the machine to monitor your VSG. Replace the erase lamp ass'y, I don't think they can be repaired.


FT-5540
TONER PROBLEMS
If the toner dispensation doesn't keep up with the usage, or if you get "Add Toner" messages when the toner is full, check that the density sensor located in front of the drum near the DV unit is seated properly. The jack that it plugs into may need to have the pins spread apart to keep the connection snug. You can access it from the rear of the machine and easily remove it for the repair with two screws.Use a pin or something small to spread the pins out so the sensor fits snugly and makes adequate contact.

5590

Problem:  Toner joint Failure. 
Usually due to deterioration of the polyurethane material after a number of years in ozone. But can also be seriously agravated by toner compacting inside toner tank placing heavy load on the mixing paddle and toner joint.
Solution: Replace toner joint and if necessary modify mixing paddle inside toner tank to reduce risk of toner compacting between paddle and tank housing.
Method:  Snip the paddle in about 10 places from the edge inwards about 15 mm. with aircraft quality tin snips. This will produce a number of small gaps in the mixing paddle thro which toner can escape before it becomes too compacted. This has been a magic cure to a frustrating problem.


Ricoh 6620, 5590
OBSERVE THOU THAT IF PAPER STALLS IN THE INVERTER SECTION, YOU MUST REMOVE THE OFFENDING INVERTER UNIT AND ADJUST THE INVERTER GATE SOLENOID. THERE IS NO STATED ADJUSTMENT IN THE MX MANUAL. THE GUIDE ASSEMBLY MUST LOWER  FAR ENOUGH TO PASS PAPER INTO THE FORK GATES UNIT. THERE ARE TWO SOLENOIDS ON THE INVERTER UNIT. ADJ THE ONE THAT MOVES THE FINGER GUIDES , LOWER IT USUALLY (MORE STROKE ON THE PLUNGER), SO THE FINGERS POINT LOWER. THE OTHER SOL JUST SETS PRESSURE ON THE ROLLELR WHICH ALLOWS PAPER INTO THE UPPER PART OF THE INVERTER. ALSO WATCH, THE WHITE ROLER WILL SOMETIMES SHOW CRACKS, WHICH WILL CAUSE INTERMITTENT INVERTER JAMS. REPLACE

Ricoh 6620, 5590, 70, 40, etc.
LIGHT COPIES
These machines will have frequent toner problems, light copies, etc.. when the toner auger (bottle) assembly becomes packed with to much toner, Dissassemble and Vacuum when doing pm's to save headaches later.


6645/55/65
DF JAMMING 60/61
CLEAN FEED ROLLER, ONEWAYS AND SHAFT.  SCOTCH BRITE THE SHAFT.   DONT USE TO MUCH GREASE. WAX THE GLASS. KEEP IT SMOOTH .

GENERAL
Be sure to clean the bias roller bar under the transfer belt at least every PM. (I do it every IM). The toner colletion bottle fills up less frequent and copy quality holds better because of better transfer. Also, put a small drop of oil on the bushings of this roller; I have had 2 or 3 squeak on me already.


A GOOD WAY TO CLEAN TONER MARKS OFF THE DRUM IS TO USE W-D 40. IT WORKS GOOD.
Ricoh 6750/Savin 9520
DRUM WRAPS
We had a severe problem with drum wraps, everything appeared to be
functioning properly. After many parts, eg: sep wires end blocks, whole
feed section we noticed (when viewed from the back) the drum pick-off
solenoid wasn't firing completely all the time. We cleaned it with alcohol,
problem solved.

A Jams
LCT place on the back side (from operator side) velcro to keep the top cover tight (lid) when closed. This is the Biggest problem with A jams. Also every 100k replace LCT rollers (all three) pick-up, feed & separation.

6750 fuser oil pump
I've run into a problem with the oil pump tube on the fuser oil pump. Over time the tube can crack and cause a loss of oil flow to the wick. I came up with a quick fix, which will tide you over until you get a replacement. Find a piece of fish tank tubing with roughly the same diameter as the OEM tube and fit it in place. You may have to use regular hose clamps to get it to seal properly. If the tube inside diameter is greater that the original you may want to pour some oil on the wick as a larger diameter tube does not get the right pump action and the wick could go dry with an extended copy run.

7060
On every call, remove and clean the inverter clutch assy. Lube with Mobil
Temp 78 or appropriate hi-temp alternative. Do not disturb the clutch
adjustment by loosening the hub set screws (allen-head). Just remove the
e-rings and pop her apart. Do this every call, and fuser and inverter
misfeed will be minimized. Peace.


7060, 7770, 7870 
PERSISTENT CODES
Fuser and exposure codes have to be reset by holding down clear\stop button while pushing SC reset button. This can drive a technician nuts when after replacing lamp, fuse, thms, etc..and machine still shows code.

Duplex multi-feeds. 
Copies will multi-feed and or jam from the duplex tray. If they make it out of the machine they will be stuck together with static. Replacing the feed and sep rollers sometimes will not help. The problem then could lie in the fuser unit. Clean and or replace oil supply components regularly. Fusing temperature is also critical. Adjust it to spec. Too hot can cause problems as well as too cold.


7770, 7870
TRAYS TIP
To force the trays into the DOWN position, hold down BOTH tray buttons while turning the
power on. It is a signal to the main board to send the trays down, no matter what. If this
doesn't work, manual release is called for.


7870INTERMITTENT CODES
Right and left hand door interlocks and main power relays are getting
pitted contacts and need to be replaced.




Hewlett Packard Printer Repair Tips: Poor Copy Quality


Provided by Reliable Copier/Printer Service:773-671-0545


Universal Print Quality Troubleshooting for Laser Printers

Click on the image that matches the print sample

Monochrome Printers

  1. Obtain a sample page
  2. Click on the image below that best matches the sample to see what will likely need to be done.

Color Printers (determine whether the problem is associated with a specific color only)

  1. Run a print quality troubleshooting page. This creates separate prints from each of the four toner cartridges.
  2. If the problem persists through all four colors, compare the samples with the images below.
  3. If the problem is isolated to one color, set the printer to Disable Cartridge Check and swap cartridges. If the problem disappears, the old cartridge was obviously bad. If the problem persists, something associated with the cartridge is to blame: its high voltage contact, high voltage circuit, or laser scanner.

light print, partial

1. Light Print

light print, entire

2. Light Print, Entire

light print, one color

3. Light Print, 1 color

missing color

4. Missing Color

specks

5. Specks

white lines

6. White Lines

lines

7. Lines

voids

8. Voids

grey background

9. Gray background

smearing toner

10. Smearing

repeating marks or ghosts

11. Repeats, Ghosts

distortion

12. Distortion

skewing

13. Skewing

smudged lines

14. Smudged Lines

distortion or blurring

15. Distortion, Blur

dark print

16. Dark Print

dark color

17. Dark Color

black page or solid color

18. Color page

white page

19. White page

1.Light Print (partial).
  1. Gently shake and reinstall print cartridge(s), making sure the cover is closed securely. If this helps, the cartridge is close to being empty, and will need replacement soon.
  2. If light areas are strips in the direction of paper movement (as in the picture), laser/scanner optics may be partially dirty. If one side of the page is light, check mechanical alignment between cartridge(s), drum(s) (if separate from cartridge), and transfer elements. This can also indicate high voltage problems (see next step).
  3. If light areas are randomly positioned on page, check high voltage contacts to the cartridge(s), drum(s), and transfer elements.
  4. If contacts look good, the high voltage power supply may be bad. Inspect the surfaces of imaging elements (cartridge(s), transfer roller or belt, etc. – and even the fuser) for visible defects corresponding to the light area on the page.
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2.Light Print (entire page, all colors).
  1. Check settings in Print Quality Menu. In particular, if Economode (or “Economy Mode”) is on, turn it off! Also experiment with print density settings. Color printers have individual print density settings for each color.
  2. Any of the items discussed in #1 (light print, partial) can also cause the entire page to be light. A halfway test can help narrow it down. Laser/Scanner and high voltage power supply are the two most common causes. Note that in a color printer with separate scanners for each color, light print in all colors is unlikely to be scanner-related, since all four scanners would have to be bad.
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3. Light Print, one color only (color printers).
  1. Check print quality adjustments for the affected color. Select “calibrate now” from the menu (this should also be done after replacing any imaging element, such as a toner cartridge, scanner, or transfer belt).
  2. Turn on Disable Cartridge Check and swap cartridges between the affected color and another color. If the same color is still light, that cartridge is bad.
  3. If the light color changes to whatever color is installed in the suspect location, something associated with that location is bad. Check the high voltage contacts. The high voltage power supply or transfer belt may be bad. If the printer has separate laser/scanners, the one associated with that slot may be bad.
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4. Missing color.
  1. Make sure that the cartridge of the affected color is properly seated (also check the high voltage contacts), and that the cartridge shutter is opening when the printer door is being closed. Check cartridge rotation by making some sort of mark on the drum (outside the printable area) and observing whether the mark has changed position after a print attempt. If not, the cartridge or the cartridge drive mechanism may be defective.
  2. If the printer has separate scanners for each color, check the relevant scanner, consulting the service manual if necessary. Make sure that the safety shutter is opening and that the scanner optics have not gotten dislodged. The scanner may also be defective.
  3. Print an engine test (see the relevant service manual for details). If all colors are present on the engine test, either the formatter or firmware is defective.
  4. Other possibilities are the transfer belt or high voltage power supply. Replace these one at a time.
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5. Specks on front or back of page.
  1. Make sure that paper and toner are within HP specifications.
  2. Clean the printer with a toner vacuum and/or run a cleaning page.
  3. If the specks occur at regular repeating intervals, use the repetitive defect ruler (in the service manual or in LPT’s Technician’s Service Edge) to pinpoint the cause.
  4. Use the halfway test to determine whether the defect originates in the toner area or the fuser. Replace the appropriate item.
  5. Check the high voltage and ground contacts. Replace the high voltage power supply.
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6. White lines.
  1. If the lines are parallel to the direction of paper movement, check the toner cartridge(s) and fuser for obstructions or visible defects that line up with the position of the lines. Also check and clean the scanner optics. It is also possible, although unlikely, for the transfer roller or belt to cause white lines in this direction.
  2. If the lines are perpendicular to the direction of paper movement and regularly repetitive, use the repetitive defect ruler to pinpoint the cause.
  3. The formatter can cause white lines. It may be possible to determine this by running an engine test, which bypasses the formatter.
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7. Dark lines.
  1. Ambient light getting into the toner cartridge can cause dark lines or bars. Make sure the printer has all covers and doors properly installed and closed. When running tests with some covers missing, do not position the printer under a bright light.
  2. Check the toner cartridge(s) and fuser for visible defects. Run a halfway test if necessary to distinguish between these items.
  3. If the lines are perpendicular to the direction of paper movement and regularly repetitive, use the repetitive defect ruler to pinpoint the cause.
  4. The formatter can cause dark lines. It may be possible to determine this by running an engine test, which bypasses the formatter.
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8. Voids.
  1. Gently shake and reinstall print cartridge(s), making sure the cover is closed securely. If this helps, the cartridge is close to being empty, and will need replacement soon.
  2. Run an engine test to make sure the formatter is not causing voids. If not the formatter, this is usually a high voltage problem.
  3. Check high voltage and ground contacts. Make sure paper and toner are within HP specifications. Make sure temperature and humidity are within normal limits.
  4. Replace the high voltage power supply.
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9. Gray background (or light colored background).
  1. Try another toner cartridge if one is available.
  2. Check density settings in the menu and experiment with them.
  3. Sometimes a darker setting will actually reduce background.
  4. Make sure paper and toner are within HP specifications (in particular, envelopes, heavy paper, and labels are susceptible to this problem). Make sure temperature and humidity are within normal limits.
  5. Check high voltage and ground contacts. Replace the high voltage power supply if necessary.
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10. Loose or smearing toner.
  1. If toner can still be smeared after printing, this is a fusing issue. Make sure paper and toner are within HP specifications. If paper is heavier or glossier than normal (such as envelopes or labels), a fuser temperature adjustment may be necessary. Consult the appropriate service manual for details. In the worst case, the fuser may be defective.
  2. If toner has a smeared appearance but cannot be smeared further, check for dirt or obstructions between the toner cartridge and fuser. Clean or remove as necessary.
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11. Repeating ghost images or any repeating mark.
  1. Use the repetitive defect ruler to pinpoint the cause. Most often, this will either be the toner cartridge or the fuser. A halfway testmay also help to distinguish between these.
  2. Ghosting (also known as offset) that happens in the fuser does not necessarily mean the fuser is bad. Make sure paper and toner are within HP specifications. If paper is heavier or glossier than normal (such as envelopes or labels), a fuser temperature adjustment may be necessary.
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12. Distortion.
  1. Check laser/scanner optics. Clean if necessary.
  2. Check the toner cartridge and the mechanism that drives it (usually the printer’s main drive assembly). If the cartridge is not turning smoothly in synchronization with paper movement, the printed image can be stretched or compressed vertically.
  3. The formatter can cause distortion. It may be possible to determine this by running an engine test, which bypasses the formatter
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13. Skewing.
  1. Run test pages from all trays. If skewing occurs from some trays but not others, look for unevenly worn rollers or obstructions in the affected trays, or in portions of the paper path that are unique to those trays.
  2. If skewing occurs from all trays, look for worn rollers or obstructions in the areas common to all print paths (primarily the registration assembly and the surrounding area). Replace the registration assembly if necessary.
  3. If the paper does not appear to be skewing, check the alignment of laser/scanner (including its internal optics) and/or toner cartridge.
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14. Smudged lines, either direction.
  1. If the lines are perpendicular to the direction of paper movement and regularly repetitive, use the repetitive defect ruler to pinpoint the cause. A halfway test may help distinguish between fuser and toner cartridge as possible causes.
  2. Dirty rollers can cause smudging. Printing from different trays can help isolate which rollers are dirty.
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15. Distortion or blurring.
  1. Check print quality adjustments in menu. Run “calibrate now” on color printers.
  2. A fuser film that is not turning freely can cause blurring. A halfway test will determine whether or not the fuser is at fault.
  3. If the image on the drum (as viewed in the halfway test) is already blurred, the laser/scanner optics may be out of focus. Replace the scanner.
  4. If the blurring happens between the toner cartridge and fuser, look for obstructions in the paper path. Abnormal vibrations can also cause blurring in this area of the printer.
  5. In color printers, blurring can be caused by improper color registration. Replace the color misregistration sensor assembly and/or the transfer belt (in many printers, the sensor assembly is part of the transfer belt).
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16. Dark Print.
  1. Check print quality adjustments (especially print density) in menu. Run “calibrate now” on color printers.
  2. Make sure paper and toner are within HP specifications.
  3. Check high voltage and ground contacts. Replace the high voltage power supply.
  4. Replace the laser/scanner (note: if all colors are too dark on a printer with multiple scanners, they are probably not all bad).
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17. Dark color.
  1. Same as #16, except that the scanner is now a real possibility (and maybe even more likely than the high voltage), since it’s only one color.
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18. Black page (or solid color page).
  1. If the page has a white border around the outside, this is a formatter/firmware issue. Replace the firmware, then the formatter.
  2. If there is no border, it is a high voltage issue: either the toner cartridge is bad, or the high voltage power supply is bad, or the connections between them are bad.
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19. White page (no error code).
  1. If white pages appear between printed pages, this may be a software issue (try printing something from the printer menu) or a paper feed issue: multiple pickup (replace the separation pad or roller) or, in some printers, incorrect paper size sensing.
  2. Make sure that all cartridges and/or drums are properly seated (also check the high voltage contacts), and that the cartridge shutters are opening when the printer door is being closed. Check cartridge/drum rotation by making some sort of mark on the drum (outside the printable area) and observing whether the mark has changed position after a print attempt. If not, the cartridge or the cartridge drive mechanism may be defective.
  3. If the printer has only one scanner, make sure that the safety shutter is opening, and that the scanner optics have not gotten dislodged. The scanner may also be defective. The manual may be necessary to help you access the scanner(s).
  4. Print an engine test (see the relevant service manual for details). If this prints normally (i.e., you get a page of lines rather than a white page), either the formatter or firmware is defective.
  5. Other possibilities are the transfer belt or high voltage power supply. Replace these one at a time.
  6. Various color printers have unique mechanisms that can cause white pages. Consult the service manuals. We will only mention one, because it is so common: on the 4600/5500 family of color printers, the developer disengagement plate (also called the alienation rod or alienation bar) on the left side of the printer can fail, causing white pages. Usually, this involves broken gear teeth on the inner surface of the plate.
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Halfway Test

The halfway test (also called the stop test) is a useful way to isolate print image defects. To perform the test, print something and then stop the paper halfway through the printer by opening the lid. This works best if you feed from the manual or MP tray, because you can watch the paper feeding. Open the lid just as the trailing edge of the page disappears into the printer. Now remove the toner cartridge. Ideally, the page will be stopped between the toner cartridge and fuser, with part of the image on the page (but unfused), and part of it still on the drum (in the toner cartridge). Observing these two partial images can help you decide where the defect is originating. There are three possibilities:
  1. There is no defect visible in either partial image. Assuming that the defect is not intermittent and happens on every printed page, this eliminates everything before the fuser. Therefore, the defect must be originating in the fuser.
  2. The defect is visible on the paper but not on the drum. This eliminates logic boards, laser/scanner, toner cartridge, and fuser. Either it is a transfer issue (bad transfer roller or high voltage) or a mechanical issue (rubbing or vibration in the area between transfer and fuser).
  3. The defect is visible in both partial images. This eliminates transfer and fuser. The defect originates in the toner cartridge, high voltage, laser/scanner, or logic boards. Further troubleshooting (such as the engine test) may be necessary to distinguish between these options.
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