Xerox Phaser 7760 Service Manual page 209

009-933 Yellow Imaging Unit Not Detected
The control logic detected that the Yellow Imaging Unit is not installed.
Initial Actions
• Ensure Yellow Imaging Unit is installed correctly.
• Turn the printer power Off, then On.
Procedure
Swap the Yellow Imaging Unit with Imaging Unit (K), (C) or (M). The problem is corrected.
Y N
Check that J405 on the MCU PWB and J624 are connected. Check the wires for an open
or short (Figure 1). If the check is OK, replace the Engine Control Board (MCU PWB)
13.1).
Replace the defective Imaging Unit (PL
Figure 1 009-933 Yellow Imaging Unit Communication
Revised
Phaser 7760 Color Laser Printer
4.1).
(PL
January 2010
2-173
Status Indicator RAP's
009-933