Xerox Phaser 4500

General Troubleshooting 4-53
4
Check the 550-Sheet Feeder PWBA:
1. Disconnect P/J83 from the 550-Sheet
Feeder PWBA.
2. Test for continuity at these points:
■ P83-3 <=> P85-3
■ P83-4 <=> P85-4
Are both continuous
Go to step 5. Replace the 550-
Sheet Feeder
PWBA
(page 8-102).
5
Check Feeder Harness 2:
1. Remove Feeder Harness 2.
2. Test for continuity across J2083 <=>
J83.
Is it continuous?
Go to step 6. Replace Feeder
Harness 2.
6
Check Feeder Harness 1:
1. Remove Feeder Harness 1.
2. Test for continuity across J20 <=>
J2083.
Is it continuous?
Go to step 7. Replace Feeder
Harness 1.
7
Check the power to the Turn Roller Clutch:
Measure the voltage across P20-10 <=>
P20-9 on the HVPS/Engine Logic Board.
Is the voltage +24 VDC?
Replace the Turn
Roller Clutch
(page 8-112).
Go to step 8.
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?
Go to “LVPS (Low
Voltage Power
Supply)” on
page 4-4.
Replace the
HVPS/Engine
Logic Board
(page 8-89).
Troubleshooting Procedure (Continued)
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