Read Sharp AR-651 (serv.man17) Service Manual online
AR-651/810 FUSER UNIT 14 - 4
NL
CPU
LGC
IH
5V SW
5V SW
14. 4. Heater Control Circuit
14. 4. 1. Configuration
[Block diagram of fuser unit and IH control circuit]
P
o
w
er code
Breaker
Side thermistor
(front)
Center
thermistor
Thermostat
Coil
Noise
filter
Fuse
AC
input
Coil
output
IH power source/
drive circuit
Control circuit
including CPU
Photocoupler
AC line
DC line
P
o
w
er supply f
o
r
photocoupler
Electric power setting
Error signal
IH ON/OFF signal
Drum
thermistor
T
emper
ature
control circuit
Side thermistor
(rear)
Fuser roller
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