Oki C7400 Maintenance Manual page 128

Unit Circuit Diagram
Red
1
+32 V
Main Cooling Fan
3
Low Voltage FANALM-N
Power Unit
Black
2
0 V
Red
1
+32 V
Electrical Chassis 3
FANALM-N
Cooling Fan
Black
2
0 V
1 Upper roller
Thermostat
a
Heater
b
Thermistor
Fuser Unit
c
d
e
f
White
M
Yellow
M
2 Backup roller
Thermostat
a
Heater
b
Thermistor
c
d
Fuse
e
f
Illustration
1. Upper roller side 1. Upper Roller Side
Between pins "a" and "b":
a
b
Between pins "c" and "d": Open
Between pins "e" and "f": 363k (at 25˚C)
2. Backup Roller Side
e f
c d
Between pins "a" and "b":
Between pins "c" and "d": 0 or open
Between pins "e" and "f": 363k (at 25˚C)
2. Backup roller side
Resistance