Phaser 4500/4510 Service Manual 4-5
General Troubleshooting
DC-DC Converter (P4500 only)
o
e
The DC-DC converter is an integral part of the LVPS in the P4510. This
procedure applies only to the stand-alone board used in the P4500.
3 Check the output of the DC-DC converter
(P4510 only):
1.Disconnect P/J40 from the LVPS.
2.Turn the power ON.
3.Measure the voltages at the following test
points:
■ P/J40-1 <=> P/J40-2: 3.3 V
■ P/J40-3 <=> P/J40-4: 5 V
Are the voltages measured within the
specified range?
Go to step 4. Replace the
LVPS.
(page 8-62)
4 Check the LVPS harness for continuity:
1.Turn the power OFF.
2.Disconnect P/J11 from the HVPS/engine
logic board.
3.Disconnect P/J41 from the LVPS.
4.Check each conductor in the harness for
continuity.
Is each conductor of J11 <=> J41
continuous?
Go to step 4. Replace the
LVPS harness
assembly
(page 8-62).
5 Is the AC power supply outlet correctly
wired and grounded?
Replace the
HVPS/engine
logic board.
(page 8-73)
Inform the
customer or
the
electrician.
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
■ DC-DC converter PWBA
■ LVPS harness assembly
■ “Image Processor Board, DC-DC Converter
(P4500), Control Panel” on page 10-31
■ “Phaser 4500 Left Side” on page 10-10
Troubleshooting Procedure (continued)
Steps Actions and Questions Yes No
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