Xerox Phaser 7400

3-170 Phaser 7400 Color Printer Service Manual
Motor Driver Board Clock Frequency Error
The Sub-CPU clock frequency on the Motor Driver Board is inaccurate.
Applicable Status Code:
Code 930: The Sub-CPU clock frequency is inaccurate.
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
■ Motor Driver Board, PL2.1.10
■ Engine Control Board, PL1.1.4
■ Print Engine Map 3 (page 10-6)
■ Print Engine Map 5 (page 10-8)
■ Print Engine Motor Driver Board (5/6) (page 10-35)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Check the Motor Driver Board connection.
Is DRV0 harness damaged or
disconnected or?
Replace the
harness.
Go to Step 2.
2
Check all pins of the DRV0 harness for
continuity.
Disconnect the DRV1 ribbon cable.
Is the cable conductive?
Replace the Motor
Driver Board
(
page 8-141). If the
error persists,
replace the Engine
Control Board
(
page 8-112).
Replace the DRV1
Harness.