Detecting Original Jams - Canon FY8-13FW-000DADF-A1 Service Manual

K. Detecting Original Jams
S8
S1 Original tray paper
sensor
S3 Registration paper sensor
S4 Upper cover sensor
The timing at which the machine checks for jams is stored in memory in the microprocessor on
the DADF controller PCB, and a jam is detected in terms of the presence/absence of paper at a
specific sensor at the time.
When a jam is detected, the machine communicates the fact to the copier in the form of a code.
(Some copiers show such codes in service mode.)
Jam type
Original retraction
Pick-
Pick-up delay
up
Registration delay
COPYRIGHT © 1998 CANON INC.
S6
S1
S7
S3
S6 Delivery sensor 1
S7 Pick-up sensor
S8 Reversal sensor
S12 Delivery sensor 2
Figure 2-269
Sensor type
S1,S7
The sensor S7 does not detect the leading edge of an original
1500 msec after the pick-up motor (M1) has turned on and, in
addition, the sensor S1 does not detect an original.
S7
The sensor S7 does not detect the leading edge of an original
1500 msec after the pick-up motor (M1) has turned on.
The sensor S3 does not detect the leading edge of an original
S3,S7
350 msec after the sensor S7 has detected the leading edge of
an original.
Table 2-209a
CANON DADF-A1 REV.0 DEC. 1998 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2 BASIC OPERATION
S14
S4
MS1 MS2
S14 Re-circulation sensor
MS1 DADF switch
MS2 Upper cover switch
Description
M4
S12
Code
01H
02H
03H
2-47