Canon NP6621 Service Handbook page 112

SERVICE MODE
No. 101 Jam Location Display
The type of jam is indicated using the copy
counter.
LED (ON)
J1 Pre-registration delay jam
J2 Pre-registration stationary jam
J3 Separation delay jam
J4 Separation stationary jam
J5 Delivery delay jam
J6 Delivery stationary jam
J7 Sorter jam
J8 Door open jam
J9 Cassette 3 pick-up delay jam
JA Cassette 3 pick-up stationary jam
Jb Cassette 4 pick-up delay jam
JC Cassette 4 pick-up stationary jam
Table 7-703
No. 107 Jam History
A press on the '1' through '10' on the numeric
keypad indicates the most recent ten jams.
A press on '1' indicates the most recent jam.
A press on '2' indicates the second most recent jam.
A press on '3' indicates the third most recent jam.
A press on '4' indicates the fourth most recent jam.
A press on '5' indicates the fifth most recent jam.
A press on '6' indicates the sixth most recent jam.
A press on '7' indicates the seventh most recent jam.
A press on '8' indicates the eighth most recent jam.
A press on '9' indicates the ninth most recent jam.
A press on '10' indicates the tenth most recent jam.
7–4
Type of jam LED (ON)
Jd Cassette 5 pick-up delay jam
JE Cassette 5 pick-up stationary jam
JF Duplexing unit inlet delay jam
J10 Duplexing unit outlet delay jam
J11 Duplexing unit registration delay jam
J12 Duplexing unit inlet stationary jam
J13 Vertical path roller 2 delay jam
J14 Vertical path roller 1 delay jam
J15 Vertical path roller 2 stationary jam
J16 Vertical path roller 1 stationary jam
J17 Deck outlet delay jam
J25 Jam due to electrical causes
(IE: Main power off during copy)
Table 7-704
No. 108 Error History
A press on the '1' through '10' on the numeric
keypad indicates the most recent ten errors.
A press on '1' indicates the most recent error.
A press on '2' indicates the second most recent error.
A press on '3' indicates the third most recent error.
A press on '4' indicates the fourth most recent error.
A press on '5' indicates the fifth most recent error.
A press on '6' indicates the sixth most recent error.
A press on '7' indicates the seventh most recent error.
A press on '8' indicates the eighth most recent error.
A press on '9' indicates the ninth most recent error.
A press on '10' indicates the tenth most recent error.
Type of jam