3-50 Phaser 4500/4510 Service Manual
Error Messages and Codes
6 1.Remove the duplex unit left cover
(page 8-96).
2.Manually rotate the gears.
Do the duplex unit roller and all
gears rotate smoothly?
Go to step 7. Replace parts
as necessary.
7 1.Open the duplex unit housing cover
and insert paper, then close it.
2.Manually rotate the upper roller gear
clockwise and check paper transfer.
Is the paper transferred smoothly?
Go to step 8. Replace drive
parts as
necessary.
8 Enter Service Diagnostics, and from
the Motors/Fan Tests menu select
the Duplex Motor High test.
Does the duplex unit motor rotate
normally?
Go to step 9. Go to “Duplex
Unit Motor” on
page 4-50.
9 Enter Service Diagnostics, and from
the Motors/Fan Tests menu select
the Duplex Motor Low test.
Does the duplex unit motor rotate
normally?
Replace the
HVPS/engine
logic board
(page 8-73).
Troubleshooting Procedure (continued)
Steps Actions and Questions Yes No
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