Jam Codes - Canon imageCLASS LBP6780dn Service Manual

5
Troubleshooting > Error Codes > Jam Codes
Error Code Detail Code Main Cause/Detection Content
E748 2012 Failed to rewrite due to no more
alternative block of Flash ROM
(NAND) available.
4000 G-Chip loopback ended in
timeout.
4020 Unknown device has been
detected on PCI.
E760 0000 CPU exception occurred.
E805 0001 Fan1 failure
0002 Fan2 failure
E808 0001 Low-voltage power supply failure

Jam Codes

Jam Code Cause
High Order Low Order
84 Paper feed delay jam 1
85 Paper feed delay jam 2
86 Paper feed delay jam 3
88 Paper feed retention jam 1
8C Fixing output delay jam 1
8D Fixing output delay jam 2
90 Fixing output retention jam 1 –
94 Internal paper jam 1
95 Internal paper jam 2
98 Door open jam 1
9C Wind-up jam 1
A4 Reversal unit jam 1
00 –
01 –
02 –
03 –
04
07 –
08 –
09 –
0C –
0D –
0E –
5 Troubleshooting > Error Codes > Jam Codes
Condition/Countermeasure
Replace the Controller board.
Replace the Main Controller
Replace the Controller board.
Turn on the power again.
Replace the Fan1
Replace the Fan2
Replace the Low-voltage power
supply unit.
T-5-30
Jam Position
–
–
–
–
–
–
–
Unknown area
Feed slot 1 – resist position area
Feed slot 2 – resist position area
Feed slot 3 – resist position area
Feed slot 4– resist position area
Resist position – cartridge area
Cartridge – fixing roller area
Fixing unit roller – paper output unit area
Duplex reverse unit and adjacent area
Duplex Feed unit and adjacent area
Duplex reload unit and adjacent area
T-5-31
5-22
5-22