Canon PC300 Service Manual page 77

PERATIONS AND TIMING:
Description
* The copyboard does not reach the start
position within a specific period of time,
or it moves past the start position.
+ The copyboard position sensor (Q902)
is ON 1.5 sec after the copyboard has
started moving forward from the start
position.
+ The copyboard position sensor (Q902)
does not go ON 10.4 sec after the copy-
board has started moving forward from
the start position.
+ The copyboard position sensor (Q902)
does not go ON 1.2 sec or 4.7 sec after
the copyboard has started moving in
reverse from the reversal position.
* The scanning lamp has remained for 2
* DC controller/DC power supply PCB
sec continuously at such times as not
(faulty)
prescribed.
.Note:
1. The copier does not use code 'E1', 'E3', 'E4', or 'ES'.
2. After self diagnosis has gone ON, the copier may be reset by switching it OFF and then
E 5 + Control panel PCB (faulty)