How to reset the PCU - Gestetner DSc224 Copier

AC charge output error [Cyan].
Poor connection with the PCU.
Check for broken connector in machine where the PCU goes into.
Defective PCU.

sc302 is usually PCU or charge roller.
As you say you have recently replaced the Drum/PCU, is the drum turning correctly?

Check charge connectors and connectors on the back of the pcu. To reset that code, simply turn main power off and on again. If problem comes right back....the machine detects the cause still exists. May be an issue with the HVT.

RICOH MP 301 PHOTOCONDUCTOR UNIT

This is a PCU PCB Communication error. 9 times out of ten it will reset by simply switching the machine off and then on again. If the problem persists here is the section from the manual that describes the possible causes and remedies.

E7-90
MFP - PCU PWB communication error
Trouble content
Detail
MFP
Cause
PCU PWB connector connection trouble. PCU PWB - MFP PWB connection trouble. PCU PWB trouble.
MFP PWB trouble.
Mother board trouble.
Check & Remedy
Check connection of the PCU PWB, the MFP PWB, and the mother board.
Check the ground.
Replace the PCU PWB.
Replace the MFP PWB. Replace the mother board.
I hope this helps

Good Luck

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I had the same issue with my CL3500N. I kept taking out and reinserting the color PCU with the same resulting error. However, I fixed my problem. My color PCU is now reset and printing
Instructions on how I fixed the issue:
1) Turn off the printer and remove the color PCU from the printer
2) Look inside the printer where you removed the color PCU and you will notice three attach points (gears) that each of the three color PCU rollers connect to the printer.
3) Notice that each roller inside the printer has an arrow stamped in metal pointing toward it. On my printer, one at approximately the 2 o'clock position, 9 o'clock position and 3 o'clock position.
4) On the color PCU look at the end of unit that you insert into the printer. Notice the white female connectors on each of three rollers. Look closely and you will see that there are notches inside each connector (gears). One of those notches is longer than the others.
5) For each roller insert your finger into the white connector (gear) to rotate the roller so the long notch aligns with the arrow inside the printer. Be careful not to touch the photo sensitive area of the roller.
6) Insert the color PCU into the printer and turn it on. May need trial and error to align the notch correctly, but it certainly worked for me.

This must be done before drum is replaced.
Resets counter.

Start the SP mode and execute the
New Unit Set:
• PCU: SP5-999-001 ∼ 004

Replace it.

no, im with you let it go bad first! when it starts to go bad the print will go bad

1. Close the top cover and carry out the following instructions to reset the Maintenance Counter.
2. Press the [Menu] key on the Operation Panel.
3. Scroll to display [Menu: Maintenance].
4. Press the [Enter] key.
5. Scroll to display [Maint. Reset: PCU] and press the [Enter] key.
6. Press the [Enter] key when [PCU Press # to Start] is displayed.
7. Press the [Enter] key when [Counter is Reset] is displayed.
8. The Maintenance Counter is now reset - the display will return to the Maintenance menu after about 2 seconds.
9. Press the [Online] key and check that [Ready] is displayed.

switch the machine off at the switch hold down online and escape while switching on the switch , hold the buttons till you see service mode on screen , you need to go to engine , then drum , there you will find the setting to reset the pcu , or under data log is a function pm counter clear if it is giving you replace pcu on the screen

You get this message because the PCU isn't seated properly. This is a link for the user manual for this printer: http://www.ricoh-usa.com/downloads/manuals/printers/cl2000.pdf On page 13 shows a diagram that indicates the photoconductor unit on the printer. Page 60 shows you different error messages, what they mean and how to fix it. It means you have to take out the pcu and reseat it into the printer, it is not in correctly. Page 29 shows you how to do this. It has pictures of how to take out the pcu and put it in correctly. I hope you get it fixed.