Question about Ricoh Aficio CL3500N Laser Printer

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Sc491 error on ricoh MPC 3500

I am receiving an sc491 error on my /ricoh MPC 3500.

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  • Anonymous Mar 25, 2014

    redial settings

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Replace drum black and swing to drum yellow....

Posted on Dec 08, 2015

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Sc 491 straight from manual

High voltage power: Drum/ development bias output error
An error signal is detected for 0.2 seconds when charging the drum or
development.
 High voltage leak
 Broken harness
 Defective drum unit or development unit
 Defective high voltage supply unit

1. Check or replace the harness.
2. Replace the drum unit or paper transfer unit.
3. Replace the high voltage supply unit.

Posted on Feb 26, 2010

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Posted on Jan 02, 2017

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I have Ricoh mpc2050 copier and there is an error coming SC491. Cant get copies.. If anyone have solution please reply


  • Code: 491
  • Description:High voltage power: Drum/ development bias output error
    An error signal is detected for 0.2 seconds when charging the drum or development.
  • Causes:• High voltage leak • Broken harness • Defective drum unit or development unit • Defective high voltage supply unit

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SC491 on a Ricoh SP 210SU is a code for bias leak.

The machine detects that a bias leak has occured from the drum charge, development charge or transfer charge.
PWM signals are sampled at 20 msec. intervals. This SC is issued if 10 PWM samplings within 200 msec. are abnormal.

• HVPS (high voltage power supply) harness loose, broken, defective
• HVPS board defective
• AIO terminal defective (the terminal for the toner cartridge)
• Cycle the machine off/on
• Check all the harness connections of the HVPS
• Check spring-loaded AIO terminal installation behind the HVPS.
• Replace HVPS.

Usually this error is related to the cartridge. Some manufacturers of compatible cartridges will replace the cartridge with a new one.
At least they should give a discount based on how many pages that was printed before it failed.

I have not seen this problem with a new genuine Ricoh cartridge.
It is important that the cartridge is not refilled more then 3 times. There is no counter on this, and companies that refill cartridges they collect (with unknown number of cartridges) may have problems quite often.

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• NoiseRFID: Communication error • Communication error occurs when the RFID starts to communicate with the RFID receptor. • Retry of RFID communication fails three times after the machine has detected the RFID communication error.
The problem is Defective RFID reader and writer • Disconnected ASAP I/F • No memory chip on the toner cartridge • Noise

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No such error code. There is a 363. That is for a bad yellow developer unit.

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hi
this error code is about "Cooling fan motor lock", we have 2 Reason for this code,1: Cooling fan motor defective or a loose
object is interfering with the fan and 2: Poor fan motor connector connection
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sc491 is a high voltage output error. Combined with your jamming issue, it sounds like a possible electrical problem somewhere. A good first step is to turn the machine off and unplug it, then take off the covers and reset any connections or cables you can get to.

If the problem persists, you should have a service technician take a look at it because it might need a board replaced.

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