No Recognition Of Duplex Unit - Xerox Phaser 4500 Service Manual

No Recognition of Duplex Unit

Phaser 4500/4510 Service Manual
Troubleshooting Reference
Applicable Parts
HVPS/engine logic board
LVPS harness assembly
Duplex unit PWBA
Duplex unit assembly harness
Troubleshooting Procedure
Steps Actions and Questions
Check the duplex unit detection signal:
1
1. Remove the duplex unit PWBA
(page 8-102).
2. Remove the duplex unit assembly
harness (page 8-100).
3. Connect J2750 of the duplex unit
assembly harness to P2750 of the
LVPS harness assembly.
4. Measure the voltage across P2750-
5 and J2750-6.
Does the voltage measure +3.3 VDC?
Check the duplex unit detection signal
2
(2):
Measure the voltage across P/J27-4
and
P/J27-3 on the HVPS/engine logic
board.
Does the voltage measure +3.3 VDC?
Check the LVPS harness assembly:
3
1. Remove the duplex unit assembly
harness (page 8-100).
2. Check the following for continuity:
J27-4 <=> J2750-5
J27-3 <=> J2750-6
J27-2 <=> J2750-7
J27-1 <=> J2750-8
Is each continuous?
Error Messages and Codes
Wiring and Plug/Jack Map References
"Duplex Unit Signal Diagram" on page 10-35
"Duplex Unit General Wiring Diagram" on
page 10-34
"Duplex Unit Plug/Jack Locator" on page 10-14
Yes
Go to step 4.
Go to step 3.
Go to step 4.
No
Go to step 2.
Replace the
HVPS/engine
logic board
(page 8-73).
Replace the
LVPS harness
assembly.
3-73