Color Misalignments - Tektronix 1235N - Phaser Color Laser Printer Service Manual

Color misalignments

1. Test the registration sensor as
described in the topic "Switch
scan test" on page 63.
2.
Look for any broken gears in
the printer. specifically, inspect
the imaging drum gear
assembly, the paper feeder
assembly and the transfer belt
assembly.
3. Inspect and clean the imaging
drum unit's power terminals
Ensure the spring-loaded pins
travel smoothly up and down.
4.
Replace any imaging drum
units you suspect are defective.
5. Are the LED heads' ribbon
cables undamaged and
properly seated? Replace any
suspect LED head assembly, if
necessary
6.
Inspect the wiring harnesses of
the junction board for damage
or improper seating.
7. Inspect the wiring harnesses of the engine controller board for damage or
improper seating.
8.
Replace the engine controller board. Transfer the old engine controller
board's EEPROM (lower-right corner of board) to the new engine controller
board.
56 Phaser 1235 Network Color Printer