4-20 Phaser 4500/4510 Service Manual
General Troubleshooting
5 Check the chute assembly harness:
1.Disconnect P/J24 from the HVPS/engine
logic board.
2.Disconnect P/J245 and P/J248.
3.Test the harness for continuity at these
points:
■ J24-6 <=> J245-13
■ J24-7 <=> J245-12
■ J24-8 <=> J245-11
■ J24-1 <=> J248-5
■ J24-2 <=> J248-4
■ J24-3 <=> J248-3
Are all the conductors continuous?
Go to step 7. Replace the
chute
assembly
harness.
6 Check the tray 1 and tray 2 harnesses:
1.Remove the no paper sensor.
2.Disconnect P/J24 from HVPS/MCU.
3.Test the harnesses for continuity at these
points:
■ P/J245-1 <=> P/J240-3
■ P/J245-2 <=> P/J240-2
■ P/J245-3 <=> P/J240-1
■ P/J248-1 <=> P/J246-3
■ P/J248-2 <=> P/J246-2
■ P/J248-3 <=> P/J246-1
Are all the conductors continuous?
Go to step 8. Replace the
Tray 1 or
Tray 2
harness.
7 Check the HVPS/engine logic board:
1.Disconnect P/J11 from the HVPS/engine
logic board.
2.Test the following points for continuity:
■ P/J11-16 <=> P/J24-6
■ P/J11-16 <=> P/J24-1
Are both continuous?
Go to “LVPS
(Low Voltage
Power
Supply)” on
page 4-4.
Replace the
HVPS/engine
logic board
(page 8-73).
8 Replace the no paper sensor (page 8-21,
page 8-30).
Does the problem still occur after
replacement?
Replace the
HVPS/engine
logic board
(page 8-73).
Problem
solved.
Troubleshooting Procedure (continued)
Steps Actions and Questions Yes No
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General
Weight and Dimensions
