Xerox Phaser 7400

3-148 Phaser 7400 Color Printer Service Manual
No Data to the [C][M][Y][K] LED Head
Applicable Status Codes:
Code 135: No data to the Yellow LED Head.
Code 136: No data to the Magenta LED Head.
Code 137: No data to the Cyan LED Head.
Code 139: No data to the Black LED Head.
Initial Actions:
■ Cycle the printer's power.
■ If the problem persists follow the procedure below.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ YK LEDDATA harness, PL12.1.21
■ CM LEDDATA harness, PL12.1.22
■ Engine Control Board, PL1.1.4
■ Print Engine Map 1 (page 10-4)
■ Print Engine Map 3 (page 10-6)
■ Print Engine LED Heads (page 10-37)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Check LED Head.
Exchange the affected LED Head with
another LED Head.
Does the error move with the LED Head?
Replace the LED
Head.
Go to Step 2.
2
Ensure the LED Head harness is properly
connected and not damaged.
Is the wiring harness defective?
Reconnect or
replace wiring
harness.
Go to Step 3.
3
Check harness continuity between the LED
Head and the Engine Control Board.
Is there continuity?
Go to Step 4. Replace the data
harness.
4
Check the CUIF connection.
Is CUIF firmly connected?
Replace the Engine
Control Board
(
page 8-112)
Connect the two
boards and secure
the screws. If the
error persists,
replace the Image
Processor Board
(
page 8-113).