Xerox 1235DT - Phaser Color Solid Ink Printer Service Manual page 41

Printer fault messages
Code Front panel message
U10 Roller Position Error U10 Power Off/On
1. Ensure the correct weight and type of paper is loaded in the currently used
tray. Also ensure the paper is loaded correctly in the tray.
2. Clean the pick and registration rollers.
3. Ensure there are no obstructions in the paper path.
4. Test the registration motor and clutch as described in "Motor and clutch
tests" on page 69. Replace the motor or clutch if necessary.
5. Inspect the wiring for the registration clutch and registration motor.
6. Replace the engine controller board.
U12 Duplex I/F Error U12 Power Off/On
1. Turn the printer off and on.
2. Pull out the duplexer and inspect its connector at the right front corner (the
connector faces rearward). Inspect the printer's corresponding connector
on the printer chassis (covered by a flexible metal plate).
3. Inspect the wiring harness leading from the engine control board to the
duplex unit connector.
4. Replace the duplex unit.
5. Replace the engine controller board.
U13 Tray 3 I/F Error U13 Power Off/On
U14 Tray 2 I/F Error U14 Power Off/On
1. Turn the printer off and then on.
2. Inspect the interface connector connecting the tray unit to the print engine.
Inspect the printer's corresponding connector on the underside of the
printer. Inspect the wiring harness leading from the connector to the
engine control board.
3. Replace the engine controller board.
U15 Control Panel Error U15 Power Off/On
1. Turn the printer off and then on.
2. Reset the printer NVRAM using the procedure "Resetting NVRAM" on
page 85.
3. Replace the engine controller board.
U18 Yellow LED Error U18 Power Off/On
U19 Magenta LED Error U19 Power Off/On
U20 Cyan LED Error U20 Power Off/On
U21 Black LED Error U21 Power Off/On
1. Ensure the LED assembly is correctly installed.
2. Inspect the wiring harnesses leading to the LED assembly.
3. Replace the engine controller board.
28 Phaser 1235 Network Color Printer
Service message
U10-Roller Position Error
U12-Duplex I/F Error
U13-Tray 3 I/F Error
U14-Tray 2 I/F Error
U15-Control Panel Error
U18-Yellow LED Bar
Missing
U19-Magenta LED Bar
Missing
U20-Cyan LED Bar Missing
U21-Black LED Bar Missing