Inputs To And Outputs From The Dc Controller - Canon PC920 Service Manual

E.

Inputs to and Outputs from the DC Controller

1. Inputs to the DC Control (1/2)
Scanner home
position sensor
Lens home
position sensor
Delivery sensor
Vertical path roller
paper sensor
Single-feeder
paper sensor
(Single-feeder type only)
Pre-registration
roller paper sensor
Sensor PCB
TH1
Fixing thermistor
TH2
Scanner thermistor
COPYRIGHT © 1999 CANON INC.
J101-1
-3
SCHP
-2
PS1
J109-11
-10
LHP
-9
PS2
J62
J102-7
DIG3
-9
DPD
-8
PS3
J132-3
-5
PDP
-4
PS4
J113-1
DIG2
-3
SFPD
-2
PS5
J108-4
-3
RPD
Q751 -5
J433 J62
J102-1
TH1
-6
J131-1
TH2
-2
Figure 2-105
CANON PC800s/900s REV.0 AUG. 1999 PRINTED IN JAPAN (IMPRIME AU JAPON)
CHAPTER 2 BASIC OPERATION
DC controller PCB
+5V
When the scanner is in the home position, '1'.
(The light-blocking plate is at PS1, '1'.)
+5V
When the lens is in the home position, '1'.
(The light-blocking plate is at PS2, '1'.)
When PS3 has detected paper, '0'.
(The light-blocking plate is at PS3, '1'.)
+5V
When PS4 has detected paper, '1'.
(The light-blocking plate is at PS4, '1'.)
When PS5 has detected paper, '0'.
(The light-blocking plate is at PS5, '1'.)
+5V
When Q751 has detected paper, '1'.
(The light-blocking plate is at PS751, '0'.)
When the surface temperature of the fixing
heater increases, the voltage decreases.
(analog signal)
When the temperature of the scanner increases,
the voltage decreases. (analog signal)
2-7