Xerox Phaser 7400

3-50 Phaser 7400 Color Printer Service Manual
Close Right Door A
The Door A Interlock Switch indicates that Door A is open.
Initial Actions:
■ Ensure that Door A is free of obstructions and fully closed.
■ Cycle printer power.
■ If the problem persists, follow the procedure below.
Troubleshooting Reference Table
Applicable Parts Wiring and Plug/Jack References
■ Door A, PL10.1.1
■ Door A Interlock Switch, PL5.1.50
■ Motor Driver Board, PL2.1.10
■ Print Engine Map 5 (page 10-8)
■ Print Engine Motor Driver Board (1/6) (page 10-31)
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Check the following for evidence of fault or
damage:
■ Door A
■ Door A Interlock Actuator
■ Door A Interlock Switch
Is there any damage or misalignment?
Replace any
damaged parts.
Go to Step 2.
2
Test the Door A Interlock Switch.
Run the Service Diagnostics Door A
Interlock Test.
Does the switch function correctly?
Replace the Engine
Control Board
(
page 8-112).
Go to Step 3.
3
Check the switch connection.
Is the switch connected to MPTCOV on the
Motor Driver Board?
Go to Step 4. Reconnect the
switch.
4
Check the Interlock Switch voltage.
Is there +5 V at MPTCOV-1?
Replace the Door A
Interlock Switch
(
page 8-132).
Replace the Motor
Driver Board
(
page 8-141).