Xerox 2135N - Phaser Color Laser Printer, Quick Reference Manual

Page: 38 / 199

Service Guide 25
U12 Duplex I/F Error U12, Power Off/On U12-Duplex I/F Error
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 U13-Tray 3 I/F Error
U14 Tray 2 I/F Error U14, Power Off/On U14-Tray 2 I/F Error
U16 Tray 4 I/F Error U13, Power Off/On U13-Tray 4 I/F Error
U17 Tray 5 I/F Error U14, Power Off/On U14-Tray 5 I/F Error
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 U15-Control Panel Error
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 U18-Yellow LED Bar
Missing
U19 Magenta LED Error U19, Power Off/On U19-Magenta LED Bar
Missing
U20 Cyan LED Error U20, Power Off/On U20-Cyan LED Bar Missing
U21 Black LED Error U21, Power Off/On U21-Black LED Bar Missing
1. Ensure the LED assembly is correctly installed.
2. Inspect the wiring harnesses leading to the LED assembly.
3. Replace the engine controller board.
U22 Yellow Toner Missing, Reseat Toner U22-Yellow Toner Missing
U23 Magenta Toner Missing, Reseat Toner U23-Magenta Toner Missing
U24 Cyan Toner Missing, Reseat Toner U24-Cyan Toner Missing
U25 Black Toner Missing, Reseat Toner U25-Black Toner Missing
1. Inspect the toner cartridge sensor flag. Ensure to moves properly and is
not broken.
2. Test the sensor using the test described in “Switch scan test” on page 63.
3. Inspect he toner sensor boards wiring harness.
4. Replace the toner sensor board.
5. Replace the engine control board.
U26 Yellow Drum Error U26, Power Off/On U26-Yellow Drum Error
Printer fault messages
Code Front panel message Service message