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. Its 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.
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
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
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...
RICOH RIPRO M10
M10 paper feed tire can also be replaced by the Ricoh 3050 tire. This tire general works better because it is slightly larger.
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.
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.
The center of the Image unit drive pully strips out and cracks. Located
in the back center upper half of the copier
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.
Very loud scraping noise intermittent. Change cleaning blade for drum.
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.
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.
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.
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!!!!!!!!
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.
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.
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.
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.
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.
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
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.
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 quanity.
4415, 4418, 4421, 4222 ADD TONER LOCKOUT
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.
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).
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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.
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 .
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
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,
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.
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
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.
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.
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.
Right and left hand door interlocks and main power relays are getting
pitted contacts and need to be replaced.
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