Epson AcuLaser C9200N Service Manual page 76

EPSON AcuLaser C9200N
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.
Table 2-4. Heater Lamp Construction
Name
Heating Roller Heater Lamp/1
Heating Roller Heater Lamp/2
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.)
OPERATING PRINCIPLES
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Light
Symbol Function
emission
Light will emit to heat to the edge of the
H1 Long
roller
Light will emit to heat only the center of
H3 Short
the roller
Operating Principle of Main Unit Mechanism
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Heating Roller Thermistor
Table 2-5. Heating Roller Thermistor Construction
Name Symbol
The main thermistor which detects the temperature at
Heating Roller Thermistor/1 TH1
the center of the Heating Roller
The sub-thermistor which detects the temperature at the
Heating Roller Thermistor/2 TH3
edge of the Heating Roller
The protection thermistor which detects the abnormally
Heating Roller Thermistor/3 TH4
high temperature of the Heating Roller
4038T2C156AA
Figure 2-67. Heating Roller Thermistor
Fusing Pressure Roller Thermistor
Table 2-6. Pressure Roller Thermistor Construction
Name Symbol
Fusing Pressure Roller The main thermistor which detects the temperature at
TH2
Thermistor/1 the center of the Fusing Pressure Roller
Fusing Pressure Roller The protection thermistor which detects the abnormally
TH5
Thermistor/2 high temperature of the Fusing Pressure Roller
4038T2C157AA
Figure 2-68. Fusing Pressure Thermistor
Revision D
Function
TH1 TH3 TH4
Heating Roller
4038T2C158AA
Function
Fusing Pressure Roller
TH5
TH2
4038T2C159AA
Confidential
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