What and where is the OPC unit - Lexmark C500n Laser Printer

Previous FIXYA question gave a possible FIX.

http://www.fixya.com/support/t7677243-ricoh_aficio_cl1000n_sc481_error_message

https://printcopy.info/?l=en&mod=erc&brand=Ricoh&model=Aficio%20CL1000N&page=3

Quoting from link above:

Code: 481
Description:
OPC belt sensor error
Causes:
• Defective OPC belt unit • Dirty OPC belt • Loose connection • Defective OPC belt sensor • Defective input output device • Defective BCU

Verify the OPC drum and OPC drum cleaning blade position,clean the gears in the image unit,and verify the developer unit.

sc 481 is the OPC belt error. check the opc belt unit. it is also called rum unit. i think the belt is worn out and needs replacing.

The error can either be caused by the OPC/OPC Marker assembly or the Main Motor assembly. Please follow the recommended troubleshooting steps:

1. Power the printer off, remove and reseat the OPC unit, and power the machine back on. Print a test page. If error continues, proceed to step 2.
2. Power the printer off and remove the OPC unit. Check the OPC Marker Sensor. If it is unsnapped or unplugged, reseat or replug it, and power the printer back on. Print a test page. If error continues, proceed to step 3.
3. Remove the OPC unit and check it for scratches or defects. Also check the the markers on the OPC to make sure they are not damaged. Is the belt scratched or damaged? If the OPC is at or near the end of its life, OPC unit must be replaced. If the belt is in good condition, contact Lexmark technical support (if printer is under warranty) or your local authorized service provider for assistance.

Ok This is how to troubleshoot the TV, there are lights on the front and you are mainly concerned with two of these lights (the power light and the OPC light). I) If non of the lights come on then this is a AC Power failure (There is a loose connection or you need to check the Power/Inverter unit or the Main unit) II) If the power light is blinking at a rate of one blink per min and the OPC light is off (then there is a CCFL backlight problem) III) If the power light is blinking at a rate of two times per min and the OPC light blinks at a rate of one time per min (13V/UR10V failure you need to check the Power/inverter board or the main board). IV) If the power light is blinking at a rate or two times per min and the OPC light blinks at a rate of two times per min (3.3V Main Failure check power/inverter board or Main board). V) If the power light is blinking at a rate or two times per min and the OPC light blinks at a rate of three times per min (UR6V failure check power/inverter board or Main board). VI) If the power light is blinking at a rate or two times per min and the OPC light blinks at a rate of Five times per min (Panel 5V failure check LCD control unit or control panel).

Remove the OPC drum unit,remove the OPC drom and change the cleaning blade(fixed 2 screws).Normally if you change the OPC drum change automatically the OPC cleaning blade.

Try pressing 1 and 7 at the same time
The LCD will show "OPC belt 1. Reset 2. Exit
Select 1 to reset the life counter.

This is supposed to be done when replacing the drum unit...but I've found that I can get 1.5 to 2 lifespans from a single unit.

To Change OPC DRUM UNIT in KONICA MINOLTA 2300 w

Switch Printer Off

Open Front Door Cover

Remove Waste Toner Box

Lift Transfer Belts Blue Knob until it's placed at 11 o'clock. (it's directly behind the waste toner box)

The OPC DRUM UNIT is directly under the BLUE KNOB

SQUEEZE HANDLE and PULL OUT the OPC UNIT

Be VERY CAREFUL NOT TO SCRATCH THE GREEN COLOURED ROLLER on the OPC DRUM UNIT.

Replace new OPC DRUM and turn BLUE KNOB of TRANSFER BELT back to 7 o'clock position

Replace Waste Toner Box, Close Front Cover and Switch On.

Status Display will show OPC Drum at 100%

(You can also replace the fuse in the OPC DRUM UNIT and save yourself HUNDREDS on a new one)
I posted this on another solve problem previously, worth looking at.

the opc belt is the optical photo conductor belt in your printer. It is the bright green shiney belt you see when you remove a cartridge. You can access it through the top of your unit. You will see a cover where the paper comes out. Inside there are two green clips that push outward. These release the opc belt.
You can purchase a replacement opc belt from most good stationary and consumable suppliers, however, be ready for a shock. the price of the opc belt is almost as much as the unit is worth.

Dear tporteous,

Your unit requires replacement of the OPC belt. this is a consumable available from most suppliers of laser products. It is easily installed and the reset is in the menus on the printer.

Now the bad news, the opc belt will retail at something over the $600 mark and to be honest, most people who are in your situation simply go out and buy another printer. The whole unit retails at about $900 if you shop around.

Sorry dude.

Gremlin11