4-38 Phaser 4500/4510 Service Manual
General Troubleshooting
6 Check the print cartridge right guide
assembly (1)
Does the Ground Plate of the print
cartridge right guide make proper contact
with terminals on the HVPS/engine logic
board?
Go to step 7. Replace the
print
cartridge
right guide
assembly
(page 8-47).
7 Check the print cartridge right guide
assembly (2):
1.Remove the print cartridge.
2.Remove the print cartridge right guide
assembly (page 8-47).
Is the Ground Plate of the print cartridge
right guide free of damage or deposits?
Go to step 8. Clean the
plate or
replace the
print
cartridge
right guide
assembly
(page 8-47).
8 Check ANT harness assembly for
continuity:
1.Disconnect P/J15 from the HVPS/engine
logic board.
Is J15 <=> J150 continuous?
Go to step 9. Replace ANT
harness
assembly.
9 Check the PWB grounds:
Remove the LVPS Shield Plate and HVPS
Shield Plate. (RRP12.1, 12.9)
Is the ground normal?
Are the screws for the grounds of the
following PWBs firmly tightened?
■ All screws of HVPS/engine logic board
■ All screws of LVPS
When an Optional 550-Sheet Paper Feeder
is installed:
Are the screws of the 550-sheet feeder
PWBA firmly tightened?
When a duplex unit is installed:
Are the screws of the duplex unit PWBA
firmly tightened?
When a stacker is installed:
Are the screws of the stacker PWBA firmly
tightened?
Go to step 10. Repair the
faulty ground.
10 Warning: Allow the fuser assembly to cool
down before removing.
Replace the fuser assembly (page 4-15).
Does the problem still occur after
replacement?
Go to step 11. Problem
solved.
11 Replace the HVPS/engine logic board
(page 8-73).
Does the problem still occur after
replacement?
Replace all
related parts.
Problem
solved.
Troubleshooting Procedure (continued)
Steps Actions and Questions Yes No
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