No Drum Imaging Unit Installed; Imaging Drum Unit Up/Down Error; Fan Error - Xerox 1235DT - Phaser Color Solid Ink Printer Service Manual

No drum imaging unit installed

1. Ensure that the drum imaging units are properly installed.
2.
Check the high-voltage terminal connectors for the imaging unit to ensure
that they are not damaged.
3. Replace the drum imaging unit.

Imaging drum unit up/down error

1. Cycle the printer power to see if the problem clears.
2.
Ensure that each imaging drum unit is correctly installed and that each
unit's drum contact assembly (a set of three spring-loaded pins) is not
damaged. Ensure that each contact moves up and down freely and is not
contaminated with toner. Remove an assembly from the printer to inspect,
if necessary.
3.
Open the top cover, defeat the top cover open switch, and observe if the
color imaging drum unit are lifted up and down.
4.
Test the drum contact assemblies using service test "Switch scan test" on
page 63. If a drum contact assembly is damaged, replace it.
5. Does each imaging drum motor rotate. Test them using the service test
"Motor and clutch tests" on page 69. Replace the main motor assembly, if
indicated.
6.
Inspect the gear drive for each imaging drum unit for damage.
7.
Replace the engine controller board.

Fan error

1. Is power supplied to pin 1 of the fan? If yes, replace the fan.
2.
Inspect the fan's wiring harness for damage.
3. Replace the low-voltage power supply
4. Replace the engine controller board.
Phaser 1235 Network Color Printer
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