Replace [C][M][Y][K] Imaging Unit - Xerox Phaser 7400 Service Manual

Troubleshooting Procedure Table (Continued)
Step Actions and Questions
4 Check continuity of the affected Antenna
Harness.
Disconnect CN2, CN3, CN4, or CN5 from
the CRUM Reader Board and CRUM
Antennas.
Is each harness conductive?
5 Check for +5V at RFID-2 on the Engine
Control Board.
Is there +5 V at RFID-2 <=> ground?
6 Check for +5V at POWER-2 on the Engine
Control Board.
Is there +5 V at POWER-2 <=> ground?

Replace [C][M][Y][K] Imaging Unit

The Imaging Unit life counter indicates that the Imaging Unit has reached end of life.
Initial Actions:
Print a Supplies Usage page to check Imaging Unit life and install date.
Replace the affected Imaging Unit and cycle printer power.
If the problem persists, follow the procedure below.
Troubleshooting Reference Table
Applicable Parts
[C][M][Y][K] Imaging Unit, PL1.1.23
Troubleshooting Procedure Table
Step Actions and Questions
1 Check the count value stored in NVRAM.
Run the Service Diagnostics CRU Counter
Read utility.
Has the counter been reset?
2 Reset the Imaging Unit count.
1. Run the Service Diagnostics Reset I/U
Counts utility.
2. Reset the count for the affected I/U.
Did the count value change?
3-60
Yes
Go to Step 5.
Go to Step 6.
Replace the
Engine Control
Board
(page 8-112).
Wiring and Plug/Jack References
Print Engine Map 3 (page 10-6)
Replace the Engine
Control Board
(page 8-112).
Replace the Engine
Control Board
(page 8-112).
Phaser 7400 Color Printer Service Manual
No
Replace damaged
wiring.
Replace the Engine
Control Board
(page 8-112).
Replace the LVPS
(page 8-121).
Yes
Go to Step 2.
Replace the
Engine Control
Board NVRAM.
No