Detecting Errors - Canon iR5000 Service Manual

CHAPTER 6 FIXING SYSTEM

3.3 Detecting Errors

The system used to control the fixing temperature checks for the following errors:
1. Temperature error by the main thermistor (TH1)
2. Sensor error by the sub thermistor (TH2)
3. Overheating error by the thermal switch (TP1)
J106B
1 1 1
·
·
·
M-TEMP [1]
7
8
9
10
·
·
·
20
Main
heater
1
·
·
·
0V
7
8
SUB_HT_ON [3]
9
SUB_DETECT [4]
10
MAIN_HT_ON [5]
11
MAIN_DETECT [6]
12
13
12V
14
J119
1 1 1
2
24V
3
0V
4
6-18 P
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0V
S-TEMP [2]
0V
Fixing upper roller
J102B
Sub heater
AC driver
F06-303-01
COPYRIGHT © 2000 CANON INC.
Main thermistor
Thermal switch
AC line off at 240˚C
Relay
2000 2000 2000 2000 CANON iR5000/iR6000 REV.0 JULY 2000
Sub thermistor
RLY
Front cover