Xerox Phaser 7400

3-164 Phaser 7400 Color Printer Service Manual
+24V Not Available to the Duplex Unit
Abnormal current indicates that +24 V is not being supplied to the Duplex Unit.
Applicable Status Code:
Code 225: Duplex Unit is not receiving +24 V.
Initial Actions:
■ Reseat the Duplex Unit.
■ 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
■ LVPS, PL3.1.1
■ Duplex Unit, PL16.1.1A
■ Print Engine Map 5 (page 10-8)
■ Print Engine Map 6 (page 10-9)
■ Print Engine Motor Driver Board (1/6) (page 10-31)
■ Print Engine Motor Driver Board (5/6) (page 10-35)
■ Print Engine LVPS (page 10-39)
■ Options Map 4 Duplex Unit Controller Board
■ Options Duplex Unit Motors and Solenoid
Troubleshooting Procedure Table
Step Actions and Questions Yes No
1
Check the Duplex Unit connector for
damage.
Is the connector damaged?
Replace the
connector.
Go to Step 2.
2
Check for +24 V at DUPLEX on the Motor
Driver Board.
1. Close the Interlock Switches.
2. Disconnect DUPLEX.
Is there +24 V at DUPLEX-6 and -13 <=>
ground?
Replace the Duplex
Control Board.
Go to Step 3.
3
Check all pins on the DUPLEX Harness for
continuity.
Disconnect the DUPLEX Harness.
Is the DUPLEX Harness conductive?
Go to Step 4. Replace the
DUPLEX Harness.
4
Check for +24 V from the LVPS.
Disconnect POW24 on the Motor Driver
Board.
Is there +24 V at POW24-1 <=> ground?
Replace the Motor
Driver Board
(
page 8-141)
Go to Step 5.