hp 9850...c500?

[copierlady]

working on HP 9850 I think is same as KM c500 has sc 30-10... Help?

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How to clear fuser abnormality codes (F34-xx, F35-xx, F36-xx).
Description:
How to clear fuser abnormality codes (F34-xx, F35-xx, F36-xx).
Solution:
To reset a fuser abnormality code, perform the following:
1. Access the 25 mode (hold down the 2 and 5 keys at power up) or turn the main switch ON and wait for the Ready to Copy message. Hold the P button down until the message Enter 4-digit Password To Change is displayed.
Note: The button must be held down for about 5 seconds before the message is displayed.
2. Enter the password 9272 and press the Start Print button.
3. Press [1: Software SW setting] on the touchscreen.
4. Press the left up-arrow, which is displayed on the touchscreen, 2 times. The number displayed above the up-arrow will change to 03.
5. Select the bit number of switch 1, using the right up-arrow, 03-1 will be displayed.
6. Press the [OFF (0)] key, which is displayed on the touchscreen.
7. Power the machine OFF/ON to exit the 25 mode or press RETURN, MODE CHANGE and then BASIC SCREEN to return to normal operation.

that code does not show up inany of my c500 service manuals

[Albonline]

ignore my last cheese headed reply

ADU conveyance drive board

communication abnormality

Conveyance drive board
(CVDB)

Printer control board (PRCB)

[copierlady]

Thanks for your help.