4-44 Phaser 4500 Service Manual
Optional 550-Sheet Feeder PWBA (Tray 4)
Note
Use this procedure when the Optional 550-Sheet Paper Feeder is installed as
Tray 4. When it is installed as Tray 3, see the procedure for the “Optional
550-Sheet Feeder PWBA (Tray 3)” on page 4-43.
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ 550-Sheet Feeder PWBA
■ Feeder Harness 5
■ Feeder Harness 2
■ HVPS/Engine Logic Board
■ “550-Sheet Feeder Signal Diagram” on page 10-28
■ “550-Sheet Feeder General Wiring Diagram” on
page 10-27
■ “550-Sheet Feeder Plug/Jack Locator” on
page 10-10
Troubleshooting Procedure
Steps Actions and Questions Yes No
1
Check Feeder Harness 2 (in Tray 4) for
continuity
Remove Feeder Harness 2.
Is J8483 <=> J83 continuous?
Go to step 2. Replace Feeder
Harness 2.
2
Check Feeder Harness 5 (in Tray 3) for
continuity
Remove Feeder Harness 5.
Is J84 <=> J8483 continuous?
Go to step 3. Replace Feeder
Harness 5.
3
Replace the 550-Sheet Feeder PWBA
(page 8-102).
Does the problem still occur after
replacement?
Problem solved. Replace the
HVPS/Engine
Logic Board
(page 8-89).
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