4-46 Phaser 4500/4510 Service Manual
General Troubleshooting
Optional 550-Sheet Feeder Feed Clutch Assembly
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ Feed clutch assembly
■ Optional 150-sheet paper
feeder
■ 550-sheet paper cassette
■ 550-sheet feeder PWBA
■ Clutch/Sensor harness 1
■ Clutch/Sensor harness 2
■ Feeder harness 2
■ HVPS/engine logic board
■ Feeder harness 1
■ “550-Sheet Feeder Signal Diagram” on
page 10-33
■ “550-Sheet Feeder General Wiring Diagram” on
page 10-32
■ “550-Sheet Feeder Plug/Jack Locator” on
page 10-12
Troubleshooting Procedure
Steps Actions and Questions Yes No
1 Check Clutch/Sensor harness 1:
1.Disconnect P/J855.
2.Disconnect P/J853.
3.Test each conductor between J855 <=>
J853 for continuity.
Is each conductor continuous?
Go to step 2. Replace
Clutch/
Sensor
harness 1.
2 Check Clutch/Sensor harness 2:
1.Disconnect P/J85 from the 550-sheet
feeder PWBA.
2.Disconnect P/J855.
3.Test each conductor between J85 <=>
J855 for continuity?
Is each conductor continuous?
Go to step 3. Replace
Clutch/
Sensor
harness 2.
3 Check the resistance of the feed clutch
assembly:
Measure the resistance of the clutch
between P/J853-1 <=> P/J853-2.
Does the resistance measure 172 ohm +/-
10% (at 20° C)?
Go to step 4. Replace the
feed clutch
assembly
(page 8-91).
4 Check the 550-sheet feeder PWBA:
1.Disconnect P/J83 from the 550-sheet
feeder PWBA.
2.Test the following points for continuity:
■ P83-1 <=> P85-1
■ P83-2 <=> P85-2
Are both continuous?
Go to step 5. Replace the
550-sheet
feeder PWBA
(page 8-85).
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