Xerox 2135N - Phaser Color Laser Printer Quick Reference Manual page 38

Printer fault messages
Code Front panel message
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
U16 Tray 4 I/F Error U13, Power Off/On
U17 Tray 5 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.
U22 Yellow Toner Missing, Reseat Toner
U23 Magenta Toner Missing, Reseat Toner
U24 Cyan Toner Missing, Reseat Toner
U25 Black Toner Missing, Reseat Toner
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
Service message
U12-Duplex I/F Error
U13-Tray 3 I/F Error
U14-Tray 2 I/F Error
U13-Tray 4 I/F Error
U14-Tray 5 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
U22-Yellow Toner Missing
U23-Magenta Toner Missing
U24-Cyan Toner Missing
U25-Black Toner Missing
U26-Yellow Drum Error
Service Guide 25