4-4 Phaser 4500/4510 Service Manual
General Troubleshooting
DC Power Supply Troubleshooting
LVPS (Low Voltage Power Supply)
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ LVPS
■ HVPS/engine logic board
■ LVPS harness assembly
■ “P4500: 24 V Interlock, Rear Cover Switch,
Main Motor, Sub Fan, Exit Motor Assembly” on
page 10-21.
■ “P4510: 24 V Interlock, Rear Cover Switch,
Main Motor, Sub Fan, Exit Motor Assembly” on
page 10-23
■ “Printer Rear” on page 10-9
Troubleshooting Procedure
Steps Actions and Questions Yes No
1 Check the LVPS control power:
1.Remove the LVPS Shield Plate
(page 8-60).
2.Disconnect P/J41 from the LVPS.
3.Turn the power ON.
4.Measure the voltages at the following test
points:
■ P/J41-1 <=> P/J41-2: 3.3 V
■ P/J41-4 <=> P/J41-3: 5 V
Are the voltages measured within the
specified range?
Go to step 2. Replace the
LVPS.
(page 8-62)
2 Check the LVPS motor power:
1.Disconnect P/J42 from the LVPS.
2.Turn the power ON.
3.Measure the voltage across P/J42-1 <=>
P/J42-2.
Does the voltage measure 24 VDC?
P4510: Go to
step 3.
P4500: Go to
step 4.
Go to “24 V
Interlock” on
page 4-24,
“Rear Cover
Switch” on
page 4-26, or
“Interlock
Switch
Assembly
(P4500 only)”
on page 4-26.
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