Wiring Diagrams - Xerox Phaser 7700 Service Manual

Error Chain /
Code Link
123 12-281 FINISHER ERROR 123 SET CLAMP FAILURE (Continued)
A B C D
Measure the voltage at the Set Clamp Sensor pin 3 (violet) and Finisher frame
ground.
Does the voltage measure 0 VDC?
Yes No
Measure the voltage between the Finisher Control Board P849-7
(see figure page 3-47) and Finisher frame ground.
Does the voltage measure 0 VDC?
Yes No
Replace the Finisher Control Board (RRP 77, on page 11-316).
Repair or replace the wiring harness between the Finisher Control
Board and the Set Clamp Sensor.
Replace the Set Clamp Sensor (RRP 75, on page 11-314).
Repair or replace the wiring harness between the Finisher Control Board and
the Set Clamp Sensor.
Replace the Finisher Control Board (RRP 77, on page 11-316).
Replace the Finisher Control Board (RRP 77, on page 11-316).
124 12-350 FINISHER ERROR 124 COMMUNICATION FAILURE
There are no diagnostics routines or test procedures for problems involving serial communica-
tions. It is recommended to address the following suspect components/assemblies in order.
• Replace the Finisher Control Board (RRP 77, on page 11-316).
• Replace the Engine Controller Board (RRP 42, on page 7-190).
• Perform a continuity check on the pertinent wires / harnesses involved in serial
communication between the Printer and the Finisher [Refer to the Printer and
Finisher Wiring Diagrams].
125 12-399 FINISHER ERROR 125 STAPLE MODE LOGIC FAILURE
There are no diagnostics routines or test procedures for problems involving serial communica-
tions. It is recommended to address the following suspect components/assemblies in order.
• Replace the Stapler Assembly (RRP 82, on page 11-322).
• Replace the Finisher Control Board (RRP 77, on page 11-316).
• Perform a continuity check on the wiring harness between the Finisher Control
Board and the Stapler [Refer to the Finisher Wiring Diagram].
2-84
Phaser 7700 Color Printer
Front Panel Message