Duplex Unit Pwba - Xerox Phaser 4500 Service Manual

Duplex Unit PWBA

Phaser 4500/4510 Service Manual
Troubleshooting Procedure (continued)
Steps Actions and Questions
Check feeder harness 2:
5
1. Remove feeder harness 2.
2. Test for continuity across J2083 <=> J83.
Is it continuous?
Check feeder harness 1:
6
1. Remove feeder harness 1.
2. Test for continuity across J20 <=> J2083.
Is it continuous?
Check the power to the turn roller clutch:
7
Measure the voltage across P20-10 <=>
P20-9 on the HVPS/engine logic board.
Is the voltage +24 VDC?
8 Check the HVPS/engine logic board:
1. Disconnect P/J10 from the HVPS/engine
logic board.
2. Test for continuity across P10-1 <=>
P20-10.
Is it continuous?
Troubleshooting Reference
Applicable Parts
Duplex Unit PWBA
Duplex Unit assembly harness
HVPS/engine logic board
LVPS harness assembly
Troubleshooting Procedure
Steps Actions and Questions
1 Check the duplex unit assembly harness:
1. Remove the duplex unit.
2. Disconnect P/J50 from the duplex unit
PWBA.
3. Test each cable between J2750 <=> J50
for continuity.
Is each cable continuous?
General Troubleshooting
Yes
Go to step 6.
Go to step 7.
Replace the
turn roller
clutch
(page 8-92).
Go to "LVPS
(Low Voltage
Power
Supply)" on
page 4-4.
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 2.
No
Replace
feeder
harness 2.
Replace
feeder
harness 1.
Go to step 8.
Replace the
HVPS/engine
logic board
(page 8-73).
No
Replace the
duplex unit
assembly
harness.
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