Checking For Jams; Delivery Delay Jam; Pc420/430/Fc220; Pc400/Fc200 - Canon PC400 Service Manual

CHAPTER 5 PICK-UP/FEEDING SYSTEM
IV. CHECKING FOR JAMS
The copier has a pick-up sensor (Q131) and a delivery sensor (Q801) to check if the
paper is moving properly inside it.
Jams are identified by the presence of paper in the pick-up or delivery assembly at
such times as preprogrammed in the microprocessor.
When the microprocessor identifies a jam, it immediately causes the main motor to
go OFF and indicates the presence of a jam.
The microprocessor identifies the following conditions as jams.
A. Delivery Delay Jam
The copy paper does not reach the delivery sensor within a specific period of time.

1. PC420/430/FC220

Power switch ON
Sequence
Copyboard
Main motor
1
(M1)
Copyboard posi-
2
tion sensor (Q902)
Pick-up sensor
3
(Q131)
Delivery sensor
4
(Q801)
Jam check
5

2. PC400/FC200

Power switch ON
Sequence
Copyboard
Main motor
1
(M1)
Copyboard posi-
2
tion sensor (Q902)
Pick-up sensor
3
(Q131)
Delivery sensor
4
(Q801)
Jam check
5
5-6
COPYRIGHT © 1998 CANON INC.
Copy Start key ON
STBY INTR
CBRV STOP
8 sec
Figure 5-401A (A4)
Copy paper inserted
STBY INTR
CBRV STOP
8 sec
Figure 5-402A (A4)
CANON PC400/420/430,FC200/220 REV.0 JAN.1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
COPY
CBFW CBRV
normal
Copy paper inserted
COPY
CBFW CBRV
normal
CBRV
LSTR
CBFW STOP
error
8 sec
CBRV
LSTR
CBFW STOP
error
8 sec
STBY
STBY