Xerox 7750DXF - Phaser Color Laser Printer Service Manual page 80

Troubleshooting Procedure (Continued)
Step Actions and Questions
6 1. Measure the voltage at...
Yellow = P405B2
Magenta = P405B9
Cyan = P405A9
on the engine control board.
2. Is the voltage 0 VDC?
7
1. Remove the Imaging Unit Plate cover.
2. Inspect the wiring harness between
the engine control board and the
developer housing assembly.
3. Is the wiring harness defective?
8 Run approximately 10 pages of the solid fill full-page prints for this color to ensure
the error is cleared.
3-14
Yes
Replace the
engine control
board.
Replace the wiring
harness.
Phaser 7750 Printer Service Manual
No
Go to step 7.
Replace the ATC
Sensor.