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e-STUDIO3511/4511 FUSER UNIT/PAPER EXIT SECTION 16 - 4 November 2003 © TOSHIBA TEC
16
16.4 Heater Control Circuit
16.4.1 Configuration
N L
CPU
Temperature
control circuit
250˚C upper limit
circuit
LGC
IH
5V SW
5V SW
Main
thermistor
Sub
thermistor
Coil Fuser roller
Coil
output
Fuse
AC
input
Thermostat
Noise
filter
Breaker
Power code
Front edge
thermistor
IH power source/
drive circuit
Control circuit
including CPU
Photocoupler
AC line
DC line
Power supply for
Photocoupler
Electric power setting
Error signal
IH1 ON signal
IH2 ON signal
[
Block diagram of fuser unit and IH control circuit
]
Fig. 16-401