Principles
Service
2.1.3.3
Control
The
is heated by the heater rod.
heater rod’s power is AC voltage. The low voltage
supply board
AC voltage to the heater rod, when the power supply board
receives the HEATER ROD ON signal from the engine
board (MC
This AC
voltage is cut by interlock switch, when the front cover is open.
The temperature for the
is detected by the thermistor. Based on the TEMP. signals from the
thermistor, the engine controller board (MC
controls the
temperature by the HEATER
ROD ON signal. standby mode
temperature is 147 degrees C, normal paper printing mode is
152 degrees C, and envelope printing mode is 170 degrees C
When paper size is set to
DL,
or COM-10, the engine controller board (MC
sets the
temperature to envelope printing mode.
ine Controller Board
Low Voltage Supply
Board
TEMP.
HEATER
ROD ON
PIJ11
13
1
AC
AC
1
Thermistor
Thermostat
Thermal
Fuse
Heater Rod
Figure 2-27.
Control Circuit
The following figure is the temperature for the
control procedure.
On
Print Starr Paper Exit
Standbv mode)
HEATER ROD ON
Temperature
182 degree C
.
,
152
c
: :
147 degree C
122 degree C
Figure 2-28. Temperature for
Control Procedure
2-16
Rw.
