Minolta Di 620 Manual page 138

<Temperature Control>
Upper Fusing Roller Thermistor and Lower Fusing Roller Thermistor detect the
surface temperatures of the corresponding rollers. They provide analog voltage
inputs to Master Board for the control of fusing temperature.
Detection of Abnormally High Temperature
When the Upper Fusing Roller Thermistor detects an abnormally high temperature
(215°C or higher), Master Board outputs a signal to turn OFF Main Relay, thus cutting
off power to the heater lamps.
CONTROL SIGNAL
H1 (SSR1)
H2 (SSR2)
CONTROL SIGNAL
TH1
TH2
PJ8A-3B
PJ8A-4B
Low Temp.
PJ3A-9B
PJ3A-10B
M-119
ON OFF
L H
L H
High Temp.
Analog Input
Analog Input
WIRING DIAGRAM
A-1~2
A-1~2
WIRING DIAGRAM
B-1~2
B~C-1~2