3-66 Phaser 6121MFP Service Manual
Error Messages and Codes
Jam at Duplex Unit Open Top Cover and Duplex Unit Cover
For detection of misfeed at the Duplex Unit reverse drive/storage section, the
Transport Sensor (PS15) is not unblocked even after the lapse of a predetermined
period of time when the Duplex Switchback Motor has been energized for reverse
drive.
Applicable Error Code
• Jam at Duplex Unit
Open top cover and
duplex unit cover
Initial Actions
Follow the directions in “Initial Actions for Jam Errors” on page 3-56.
Troubleshooting Procedure Table
Step Action and Questions Yes No
1 Perform a Tray 1 Paper Feed test
(page 6-31).
Does Tray 1 feed paper normally?
Go to step 5. Go to step 2.
2 Clean the 500-Sheet Feeder Paper Pick-
up Roller (page 7-10).
Does the problem persist?
Go to step 2. Complete.
3 Check the Engine Control Board
connector P/J21.
Is the connector seated properly?
Go to step 3. Reseat the
connector. If
the problem
persists, go to
step 3.
4 On the Engine Control Board, check the
Registration Sensor signal at P/J12-6.
Is the sensor operational?
Go to step 4. Replace the
Registration
Sensor
(page 8-106).
If the problem
persists, go to
step 4.
5 Replace the 500-Sheet Feeder
(page 8-109).
Does the problem persist?
Go to step 5. Complete.
6 Replace the Engine Control Board
(page 8-59).
Complete.
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