Wiring Diagrams; Finisher Wiring Diagrams - Xerox 7700DX - Phaser Color Laser Printer Service Manual

Error Chain /
Code
123 12-281
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
Replace the Set Clamp Sensor (RRP 75, on page 11-334).
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 11-336).
Replace the Finisher Control Board (RRP 77, on page 11-336).
124 12-350
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 11-336).
• Replace the Engine Controller Board (RRP 42, on page 7-206).
• 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
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 11-342).
• Replace the Finisher Control Board (RRP 77, on page 11-336).
• 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 Laser Printer Service Manual
Link
FINISHER ERROR 123 SET CLAMP FAILURE (Continued)
Measure the voltage between the Finisher Control Board P849-7
(see figure page 2-46) and Finisher frame ground.
Does the voltage measure 0 VDC?
Yes No
Replace the Finisher Control Board (RRP 77, on page 11-336).
Repair or replace the wiring harness between the Finisher Control
Board and the Set Clamp Sensor.
FINISHER ERROR 124 COMMUNICATION FAILURE
FINISHER ERROR 125 STAPLE MODE LOGIC FAILURE
Front Panel Message