Detecting Jams; Detecting Jams In The Printer Unit - Canon CP660 Service Manual

V. DETECTING JAMS
A.

Detecting Jams in the Printer Unit

The printer unit is equipped with the following paper sensors to check the pres-
ence/absence of paper and to find out whether paper is moving normally inside it:
• Registration paper sensor (PS1)
• Pick-up assembly paper sensor (PS17)
• Separation sensor (PS5)
• Face-down tray delivery sensor (PS11)
• Transparency sensor 1/2 (PS1801/PS1802)
• Fixing delivery sensor (PS1903)
A jam is identified in relation to the presence/absence of paper at a specific sensor at
such times as programmed in the microprocessor (CPU) in advance.
When the microprocessor identifies a jam, it stops the ongoing printing operation and
communicates the fact to the printer board*
1
* Reader controller PCB (when making prints with the reader unit installed).
Face-down tray
delivery sensor
PS11
Face-up tray
Face-up
delivery roller
COPYRIGHT © 1999 CANON INC.
Download free service manual at http://printer1.blogspot.com
1
Face-down tray
Face-down
delivery
roller
Separation
sensor
Fixing delivery
PS5
sensor
Intermediate
PS19
transfer drum
Upper
fixing roller
Lower
fixing roller
Transparency sensor
Secondary
transfer belt
Cassette 1
Cassette 2
Figure 5-501
CANON 660/2100 REV.0 FEB. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 5 PICK-UP/FEEDING SYSTEM
.
Registration paper
sensor
PS1
Multifeeder
pick-up roller
Feeding roller 2
Registration roller
Transparency sensor
PS1802
PS1801
Pick-up roller
Pick-up roller
PS17
Pick-up
assembly
paper sensor
5-29