Epson Aculaser C9200N - Page 76

EPSON AcuLaser C9200N Revision D
OPERATING PRINCIPLES Operating Principle of Main Unit Mechanism 76
Confidential
HEATER LAMP CONSTRUCTION
Three heater lamps are controlled to be turned ON/OFF so the temperature of
the Heating Roller and the Fusing Pressure Roller will stay appropriate to
completely fuse the image.
 Heater Lamp Construction
The Heating Roller has two heaters with different heat quantities and light
distributions.
 Pressure Heater Lamp Construction
The Pressure Roller has the Pressure Roller Heater Lamp (H2) to heat up.
THERMISTOR CONSTRUCTION
The Fusing Roller (Heating/Fusing Pressure) has five Thermistors. (Three on
the Heating Roller, two on the Fusing Pressure Roller.)
 Heating Roller Thermistor
Figure 2-67. Heating Roller Thermistor
 Fusing Pressure Roller Thermistor
Figure 2-68. Fusing Pressure Thermistor
Table 2-4. Heater Lamp Construction
Name Symbol
Light
emission
Function
Heating Roller Heater Lamp/1 H1 Long
Light will emit to heat to the edge of the
roller
Heating Roller Heater Lamp/2 H3 Short
Light will emit to heat only the center of
the roller
Table 2-5. Heating Roller Thermistor Construction
Name Symbol Function
Heating Roller Thermistor/1 TH1
The main thermistor which detects the temperature at
the center of the Heating Roller
Heating Roller Thermistor/2 TH3
The sub-thermistor which detects the temperature at the
edge of the Heating Roller
Heating Roller Thermistor/3 TH4
The protection thermistor which detects the abnormally
high temperature of the Heating Roller
Table 2-6. Pressure Roller Thermistor Construction
Name Symbol Function
Fusing Pressure Roller
Thermistor/1
TH2
The main thermistor which detects the temperature at
the center of the Fusing Pressure Roller
Fusing Pressure Roller
Thermistor/2
TH5
The protection thermistor which detects the abnormally
high temperature of the Fusing Pressure Roller
4038T2C156AA
4038T2C158AA
TH1 TH3 TH4
Heating Roller
4038T2C157AA
4038T2C159AA
TH2
TH5
Fusing Pressure Roller