Xerox Phaser 7400

3-122 Phaser 7400 Color Printer Service Manual
Fuse Cut Error In [C][M][Y][K] Imaging Unit
The in-use fuse for the indicated Imaging Unit remains intact.
Applicable Status Codes:
Code W18: Fuse Cut Error in Cyan Imaging Unit
Code W19: Fuse Cut Error in Magenta Imaging Unit
Code W20: Fuse Cut Error in Yellow Imaging Unit
Code W21: Fuse Cut Error in Black Imaging Unit
Initial Actions:
■ Reseat the indicated Imaging Unit.
■ Cycle the printer's power.
■ If the problem persists follow the procedure below.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ [C][M][Y][K] Imaging Unit, PL1.1.23
■ I/U Sensor Board, PL5.1.21
■ Print Engine Map 8 (page 10-11)
■ Print Engine Imaging Unit Sensor Board (page 10-41)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Check the affected Imaging Unit contacts
for evidence of fault or damage:
Is there any damage, debris or corrosion?
Replace the
damaged parts.
Go to Step 2.
2
Test the Imaging Unit fuse.
Run the Service Diagnostics Read Fuse
test on the affected Imaging Unit.
Is the Fuse Cut?
Replace the Engine
Control Board
(
page 8-112).
Go to Step 3.
3
Replace the affected Imaging Unit.
Does the error persist?
Go to Step 4. Complete.
4
Check the CTG0 harness continuity.
Disconnect CTG1 from the Imaging Unit
Sensor Board and CTG0 from the Engine
Control Board.
Is the harness conductive?
Replace the I/U
Sensor Board
(
page 8-142).
Replace the
harness.