Xerox Phaser 7760 Service Manual page 187

009-428 Change Black Imaging Unit Soon
The Black Imaging Unit must be replaced soon/reached end of life.
Procedure
Replace the Black Imaging Unit. The problem is corrected.
Y N
Replace the Engine Control Board (MCU PWB)
Return to Service Call Procedures.
Revised
Phaser 7760 Color Laser Printer
(PL 13.1).
January 2010
009-429 Change Yellow Imaging Unit Soon
The Yellow Imaging Unit must be replaced soon.
Procedure
Replace the Yellow Imaging Unit. The problem is corrected.
Y N
Replace the Engine Control Board (MCU PWB)
Return to Service Call Procedures.
2-151
(PL 13.1).
Status Indicator RAP's
009-428, 009-429