Question about Ricoh Aficio AP3800C Laser Printer

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Ricoh error code sc291

The printer shows error sc291 also it is recognizing the blue ink anymore the stats shows auto power off due that error

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Re: ricoh error code sc291

There's a list of Ricoh error codes right here: but it doesn't indicate an sc291 for the 3800 or for any other model for that matter.

There are usually contacts on the cartridge that interface with a reader in the printer to detect the chip in the cartridge. Examine a cartridge and look for any electrical contacts, make sure they don't look damaged or dirty clean them with 98% isopropyl alcohol. With the printer powered off and upplugged, try to find the corresponding contacts inside the printer for each of the contacts on the cartridge, clean those too.

If that doesn't change, try a different cyan cartridge, if that still doesn't work you will probably have to get the machine serviced.

Posted on Jan 14, 2008

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look here for instructions:

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Ricoh ap3800 error code sc261

Hi there the following is taken from the service manual. Thanks J

SC 261 LD HP sensor
not switched
off (for K only)
After the laser beam pitch was
changed, it takes more than
five seconds for the HP sensor
to switch off.
• Defective motor
• Defective sensor
• Mechanical problem
when switching the
• Brown fuse (FU81) on
the Power supply unit
1. Turn the main switch off and on.
2. Check the sensor actuator position of
the LD positioning motor.
3. Replace the LD positioning motor.
4. Replace the LD home position
5. Check and/or replace the PSU.

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3 Answers

Error code: U150 The following ink tank cannon be recognized (Cyan)

U150 ink error fixed!

I too was getting the error for unrecognized ink cartridge. Then the little green circ board fell out of the end of the ink cartridge and it hit me that maybe if I put in the little green circ board from the old ink cartridge of the same color, then maybe the ink cartridge would be recognized. It worked! So don't throw out an ink cartridge that still has ink just because of that error and hold onto your empty cartridges in case you need the little green/gold circ boards.

This works!

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Ricoh Aficio MP C1500SP - functional error SC202

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