Question about Ricoh Aficio AP3800C Laser Printer

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I have serious color shifting occuring even after manuel color registration. Lots of clicking noises that I can't isolate. I have a new transfer unit on the way. Is there any way to run the main motor in service mode, with PCU's & developers removed so that I can isolate the clicking noises? I want to make sure I don't have any stripped gears.

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No,the printer will not run without PCU's installed.The only way unfortunately on this model is to check all gears visually.Most likely bad gears either in one of the PCU's or in the fusing unit.

Posted on Oct 03, 2009

Testimonial: "Found the problem. The toner waste auger within the magenta PCU broke off the spindle. Replace the PCU and repaired the broken auger."


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Related Questions:

1 Answer

How do fix error Color registration could not performed

Possible remedies for weak images.
-Loose connection between transfer roller and high voltage supply unit.

-Dust in the laser beam path

-Transfer belt not contacting PCU.

Check the transfer unit.

Defective PCU. Replace the PCU.

Defective transfer roller. Repair the transfer roller.

Defective fusing unit. Replace the fusing unit.

Defective engine board. Replace the engine board.

Feb 02, 2016 | Ricoh Aficio SP C410DN Laser Printer

1 Answer

What's your question? my konica minolta c451e printing machine showed me an error code p21, what could that mean and it is not printing any image but black-green shade

P-21 - Color regist test pattern failure
• The number of points detected in the main scan direction is more or less than the specified value during main scan direction registration correction.
• The number of points detected in the sub scan direction is more or less than the specified value during sub scan direction registration correction.

P-21: Color regist test pattern failure
Relevant parts:
• Transfer belt unit
• PH unit
• Printer control board (PRCB)
1/ Wipe clean the surface of the transfer belt with a soft cloth, if it is dirty.
2/ Change the image transfer belt unit if the transfer belt is damaged.
3/ Change the PH unit.
4/ Change PRCB.

(See Service Manual, pages 599, 603):

See also here:
Konica Minolta Bizhub c451 Reparacin de Fotocopiadoras YoReparo
Thread Problemas na C451 7 21

May 31, 2015 | Konica Minolta Office Equipment & Supplies

1 Answer

Konica/Minolta 2350EN color laser printer. First page of a print job is shifted down on the page, as much as an inch. Subsequent pages improve unitll, after about 5 pages, they are normal. After print

It sound as if you are having a problem with the registration clutch, I would first clean the reg. roller first and you may need a service tech to address the registration clutch.

Dec 05, 2013 | Minolta QMS 2200DL Laser Printer

1 Answer

Ineo +200 status p 6 and p 21

P-6 : Cyan imaging unit failure
P - 7:Magenta imaging failure
P -8 :Yellow imaging unit failure
P -9:Black imaging unit failure
Select Imaging Process adjustment - D Max Density and if the setting value is negative readjust.
Check the drive transmission portion of the imaging unit and correct as necessary,clean theIDC registration sensor windows if dirty,clean the contact of the imaging unit connector if dirty,check the high voltage connector for proper connection.If necessary change the image unit or the image transfer belt unit.
P -21 : Color shift test pattern failure.
Wipe clean the surface of the transfer belt with a soft cloth or change the image transfer belt unit if the transfer belt is damaged.

Feb 21, 2013 | Konica Minolta Office Equipment & Supplies

1 Answer

6500 konica minolta biz pro error code 2840

Konica 6500./6501/5500/5501/6000 printer 2840 problem/error

Solution...this problem is due to color correction unit PGC Sensor. While reading the maximum density this problem has occurred. This centre sensor is also called Gamage sensor.
It is situated at the top left side opposite to Image transfer belt unit for reading the patches as well as maximum density.

The problem is due to dust or toner scattering in these 3 sensors.take out the unit thorowly clean all the three sensors including the contact sockets.
Ensure that all the three shutters are opening properly for all the three sensors.
The centre PGC Sensor is covered with two white tabs.please gently remove them and remove the toner by cleaning.there are chances for toner accumulation under these white plastic tabs.

After cleaning all sensors fix it and do auto Gama adjustment.and color registration adjustment.

PGC and other left and right sensors of the color registration/correction unit also gives 45-20error most of the time either due to dust or due to non opening of the shutters

Jun 11, 2012 | Office Equipment & Supplies

1 Answer

What causes recurrent 1LT error message?

Normally when you get an image shift it's because something went wrong in the registration section. This model has a registration roller that is driven by a clutch and solenoid. A frequent problem on this unit is that the registration solenoid will stick open and cause the print to shift on paper and it can be intermittent. You can try clean the solenoid plate, otherwise you will have to replace, the part number is 121E26000.

Mar 19, 2012 | Xerox Phaser 6115MFP/D - Multifunction -...

2 Answers

My Ricoh 7300 is printing but all the color are not lining up

Try running auto color registration adj from user tools/menu(try it a couple times)
If this doesnt clear it up you will need to have a transfer belt and or transfer belt assy replaced

Dec 11, 2009 | Ricoh Aficio AP3800C Laser Printer

1 Answer

Error code: color registration error and ultra-light, smudged printing on right side of paper

have you replaced all of the consumables?
drums X2 black and color
developer units X4 CMYK
transfer imaging belt X1
Fuser unit X1
if the unit has over 60k prints it will need to have these items replaced and once that is done the color registration will come back inline.

Jul 28, 2009 | Ricoh Aficio CL3500N Laser Printer

2 Answers

Printing problem

Pull out the color photo conductor unit. If you see lines on any of the green drums replace the color photo conductor unit. You can also get color registration errors if the transfer unit is scrached. my first recomendation is to look at the color pcu unit and replace it if you see any lines on it. Also pull out and inspect the black pcu unit.Let me know what you find.

Jul 07, 2008 | Ricoh Aficio CL2000 Laser Printer

2 Answers

ImageRunner c3200 Color Registraton

With my experience, it's not the registration nor calibration problem, it's either transfer belt is bad or inside the transfer belt is dirty or dusty as well as transfer rollers. here is what I do first
take the transfer belt unit out of the machine, take transfer belt out from the unit, clean inside of transfer belt with damp cloth and rubbing alch. clean all rollers and reinstall.
What it is if the transfer belt and transfer rollers are dirty and dusty, it slips and make it like it's not align. I think most of time it fix the problem with my exp. if not replace new transfer belt

Jan 15, 2008 | Canon imageRUNNER C3200 Copier

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