Ricoh AP3800 COLOUR Laser Printer

This is most likely a fuser issue. If you have a spare laying around, I would suggest replacing your fuser. If you have a contract with Ricoh, I would suggest placing a service call for them to come out and look at the machine.

1) If the printer continuously displays the error code SC556, try these solutions to resolve the issue. Check if resetting the printer resolves the problem.

2) Power on the printer by pressing the Power button and then unplug the power cord from the printer's rear. The power cord should be unplugged from the wall outlet and wait for at least 15 minutes.

3) Connect the power cord back to the printer and the wall outlet and check if the printer turns on. If not, press the Power button on the printer.

4) See if the printer still displays the error message on the control panel screen. Try to reload the paper and check the condition of the paper.

5) Try to adjust the paper settings in the print driver and see if the issue is resolved.

To reset fuser SC codes you need to enter Service Programme Mode and reset SP5-810 to 1, then turn the main switch off and on again. If you need help on entering SP mode etc. then take a look here.

SC846 is not a code listed in the service manual... are you sure you are reading it right?

Try turning the machine off, unplugging it for 30 seconds, and turning it back on. Any luck?

SC is for "Service Call". The error may be caused by a defect or an irritation of internal sensors.
Ricoh recommends to physically switch off the printer, wait for a few minutes and power on again. (Irritation by change in surrounding temperature)
If you recently replaced any movable parts inside, remove it again and reseat, many parts inside are checked by sensors for proper seating.
If this does not help, you need to call Ricoh customer service.

fuser problem . danger . call tech

It's the fuser. You can try turning it off, wait 30 seconds, and turn it back on again.

If the problem continues, call a technician in to get the thermistor replaced.

It's a common error.

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
actuator
• 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
sensor.
5. Check and/or replace the PSU.

I am pretty sure Sc376 is your Magenta not Cyan. try replacing your magenta developer unit and your magenta drum unit. If you buy them from a dealer you will have to buy all the colors not just magenta. Try Ebay first and search for supplies for your model.