20 Most Recent Xerox DocuColor 12 Printer - Page 9 Questions & Answers

NVM CHANGE
752-008 = 2
702-031 = 1
702-032 = 30
702-037 = 0
702-038 = 0

NVM 776-063 = 0, 776371 = 0

REMOVE DEFECTIVE PWB AND INSTALL NEW ONE

AC DRIVER PCB PROBLEM, CHECK THE FUSE AND REPLACE IT,

CHECK THE ROTARY MOTOR PCB FUSE (FUSE BLOWN), TRY THIS

There is a clutch problem, you will need a printer service engineer to replace it.

That's a process problem with that machine.
May require a service call .ON and OFF is pretty much all a customer can do and wait for it to setup.
NOTE: The problem occurs because of the trickle development system in the machine, making extended lengths of black and white copies / prints does not allow the black developer housing to purge itself of excess waste Toner (Dry Ink) and Developer. There are two solutions for the problem:

• Make 1,000 copies / prints of a black and white job, then make 150 copies / prints of full color. Continue making 1,000 copies / prints of the black and white job, then 150 full color, and so on, until the entire black and white job is complete.
• Make extended jobs in groups of 100 by making 100 copies / prints of the black and white job, then allowing the machine to cycle down (return to 'Ready') and making the next 100 copies / prints. Continue in this pattern until the entire black and white job is complete.

Rotary dev fail. usualy caused by using black only for a long time.
Most likly, it will need a clean out and replacement of the black developer and then replacement of the fuse on the driver board

Did it make a big noise? If yes check the 2nd BTR, the gear could be broken.

The code indicates the rotary did not reach the home position.

Also double check the fuse on the rotary.

You have cleaned the developer you may need to replace it.

1 side printing drak & light

NVM Location 774-179 shows invalid reading typically 74
Set value to 3400