Phaser 7700 Color Laser Printer Service Manual
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FINISHER ERROR 122 DECURLER FAILURE
Remove the Finisher Rear Cover (RRP 72, on page 11-330).
Enter Service Diagnostics Mode.
From the Main Menu, select “Sensor Tests/Finisher Sensors/Miscellaneous
Manually rotate the Decurler Cam Shaft such that the photo interrupter toggles the Decurler
Cam Home Sensor.
Does the display indicate the Decurler Cam Home Sensor toggling between H & L?
Yes No
Remove the Rear Cover and the Board Cover (RRP 72, on page 11-330).
Measure the voltage between the Finisher Control Board P849-2 (see figure page 2-46)
and Finisher frame ground.
Again manually rotate the Decurler Cam Shaft such that the photo interrupter toggles the
Decurler Cam Home Sensor.
Does the voltage toggle b5 VDC and 0 VDC?
Yes No
Measure the voltage at the Decurler Cam Home Sensor pin 2 (yellow) and Finisher
frame ground.
Once again manually rotate the Decurler Cam Shaft such that the photo interrupter
toggles the Decurler Cam Home Sensor.
Does the voltage toggle b5 VDC and 0 VDC?
Yes No
Measure the voltage at Decurler Cam Home Sensor pin 1 (gray).
Does the voltage m5 VDC?
Yes No
Measure the voltage between the Finisher Control Board P849-3
(see figure page 2-46) and Finisher frame ground.
Does the voltage m5 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 Decurler Cam Home Sensor.
A
B
C
D
Error
Code
Chain /
Link
Front Panel Message
Summary of Contents for 7700DX - Phaser Color Laser Printer
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