Canon FAX L1000 Service Manual page 458

FAX-L1000 Chapter 5: Appendix
"DUPLEX JAM" message appears when the paper jam has not occurred; so,
the fax cannot be in READY mode.
<Possible causes>
1. Reversing paper sensor lever does not move smoothly, or is damaged.
Action: Set the lever to move smoothly. Replace it if damaged.
2. Duplexing unit pick-up paper sensor lever does not move smoothly, or is damaged.
Action: Set the lever to move smoothly. Replace it if damaged.
3. Defective reversing paper sensor
Action: Replace the sensor.
4. Defective duplexing unit pick-up paper sensor 1
Action: Replace the sensor.
5. Defective duplexing unit driver PCB
Action: Replace the duplexing unit driver PCB.
6. Defective ECNT board
Action: Replace the ECNT board.
7. Defective SCNT board
Action: Replace the SCNT board.
8. Defective TWINS board
Action: Replace the TWINS board.
9. Defective FAX-L1000 Printer kit
Action: Replace the FAX-L1000 Printer kit.
b) Signal description
Duplexing unit(J701) ,/ Reversing motor
J701
/
1
/
2
/
3
/
4
Motor Signal name
1 IMT A
2 nIMT A
3 IMT B
4 nIMT B
Description
Reversing motor drive signal
Reversing motor drive signal
Reversing motor drive signal
Reversing motor drive signal
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