Xerox Phaser 6128MFP Service Manual page 187

Phaser 6128MFP Service Manual
Troubleshooting Procedure Table
Step Actions and Questions
1 Replace the affected Toner Cartridge
(page 8-13).
Does the error still occur?
2 Check Toner CRUM harness
continuity between P/J31 on the
MCU Board and these CRUM
connections:
Yellow: J311
Magenta: J312
Cyan: J313
Black: J324
Is the Toner CRUM harness
damaged?
3 Check the toner CRUM voltage at
P/J31 on the MCU Board.
Measure the voltage across:
Ground <=> P/J31-3 pin (Yellow)
Ground <=> P/J31-7 pin (Magenta)
Ground <=> P/J31-11 pin (Cyan)
Ground <=> P/J31-15 pin (Black)
Is +3.3 V available at the indicated
CRUM connector?
4 Check for +3.3 V at P/J14 on the
MCU Board.
Is 3.3 V available at P14-12?
Error Messages and Codes
Yes No
Go to step 2. Complete.
Repair the Go to step 3.
harness.
Replace the Go to step 4.
Dispense
Assembly
(page 8-91).
Replace the Replace the
MCU Board LVPS
(page 8-57). (page 8-47).
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