Fusing Temperature Control - Epson ACULASER COLOR 2000 Service Manual

EPSON AcuLaser C2000 / AcuLaser C1000

2.2.8.2 Fusing Temperature Control

Control Circuit
Thermistor 1 (TH1) detects the surface temperature of the heat roller and
inputs temperature signal to CPU. Heater lamp (H1) turns on/
off according to the heater on/off signal, which is conveyed in the form of Pout
signal output according to the thermistor 1 detected temperature.
The surface temperature of the pressure roller is adjusted by the heater
lamp (H2) and thermistor 2.
Even when the thermistor detects the abnormal high temperature (the
surface temperature of the roller exceeded 210
turned OFF, the printer turns off the relay of PU1 and turns the heater lamp
OFF compulsory.
L Heater ON
H Heater OFF
Operating Principles
C), if the Pout signal is not
°
Printing Process
CPU
DC5V
-
+
H H
H
L
POUT
H
Heater ON/OFF
Signal
L Heater ON
L Heater ON
Figure 2-31. Fusing Temperature Control
Revision E
Thermistor 1
サーミスタ１
PJ4D
TH1
DC5V 2
1
DC5V
1
2
PJ5D TH2
Thermistor 2
サ−ミスタ２
Thermostat Heater Lamp
TS1 H1
CN95
PU1
1
PJ4A PJ5P
1
1 2
2
0
3
9 3
4
8
1
96