Xerox Phaser 7100

Error Troubleshooting
Xerox Internal Use Only Phaser 7100 Service Manual 2-269
Duplex Regi On Jam/ Duplex Sensor On Jam
Duplex error has occurred due to one of the following problems.
• After the Duplex Jam Sensor has detected a paper, the paper did not reach the Registration
Sensor within the specified time.
• After a paper has entered the Duplex Feed operation, it did not reach the Duplex Jam Sensor.
Applicable Fault Codes
• 077-123: Duplex Feed Regi Sensor On Jam
• 077-131: Duplex Wait Sensor On Check Jam
Initial Actions
• Check the paper path for debris.
• If the problem persists, perform the following procedure.
Troubleshooting Reference
Applicable Parts Wiring and Plug/Jack Map References
• Registration Sensor, PL 5.1.3
• Bypass Tray Turn Roller, PL 5.1.8
• Turn Roller Clutch, PL 5.1.9
• Paper Handling Motor (P/H Drive Assembly), PL 11.1.19
• MCU PWB, PL 12.1.15
• Duplex Unit, PL 14.1.1
• Duplex Motor, PL 14.2.1
• Duplex Roller, PL 14.2.9
• Duplex In Clutch Assembly, PL 14.2.20
• Duplex PWB, PL 14.3.8
• Duplex Jam Sensor, PL 14.3.17
Troubleshooting Procedure
Step Actions and Questions Yes No
1. Check the paper transport path.
Is there any debris on the paper transport path?
Remove the debris. Go to step 2.
2. Check the Duplex Rollers.
Are the Duplex Rollers installed properly?
Go to step 3. Reinstall the Duplex
Rollers (REP 14.3
Duplex Roller on
page 4-251).