Epson Aculaser M 2000 Service Manual

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 71
ConfidentialPAPER LIFTING MOTION CONTROL†
It turns the MP tray Pick-Up Solenoid (SL2) ON when the MP tray paper 
feed is started. The Lifting Cam will rotate to move the Paper Lifting plate 
up to the feeding position.
†
When the printing is finished, the MP tray Pick-Up Solenoid (SL2) will be 
ON again. The Paper Lifting Cam will then rotate to move the Paper 
Lifting plate down to the waiting...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 72
Confidential2.2.13  Registration Roller section2.2.13.1  Composition
Figure 2-58.  Composition
2.2.13.2  Drive
Figure 2-59.  Drive overview
2.2.13.3  OperationREGISTRATION ROLLER CONTROLThe followings are controlled.†
The paper will create a loop between the Feed Roller and the Registration 
Roller when the paper is being conveyed in order to correct the skew.
†
The Registration Roller Clutch (CL1) is...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 73
ConfidentialOHP DETECTIONOHP Sensor (PC4) checks to prevent printing on the paper other than OHP.
 
OHP detection will be performed before paper made the loop at the 
Registration Roller. When the OHP detection shows the different result from 
the setting on the operation panel, printing will stop to display Media Error.
Figure 2-61.  OHP detection 2
DECELERATION CONTROLIt controls the timing the paper...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 74
Confidential2.2.14  Fusing section2.2.14.1  Composition
Figure 2-63.  Composition 1
Figure 2-64.  Composition 2
4038T2C119AA
4039T2C119AA
4038T2C191AA
Fusing Pressure Roller  
Heater Lamp (H3) Pressure 
Roller Heating Roller Thermistor/1 (TH1)
Heating Roller Thermistor/2 (TH3)
Heating Roller 
Thermostat (TS1)
Heating Roller Heater Lamp/1 (H1) Heating Roller Heater Lamp/2 (H2)Heating 
Roller
Fusing...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 75
Confidential2.2.14.2  Drive
Figure 2-65.  Drive overview
2.2.14.3  OperationFUSING ROLLER DRIVE CONTROL†
Fusing Roller Speed Change Control„
The Fusing Roller (Heating Roller/Fusing Pressure Roller) is driven by 
the Fusing Motor (M4). The Fusing Motor (M4) drives the Heating 
Roller. The Fusing Pressure Roller rotates along with the Heating 
Roller.
„
In order to avoid fusing error, the rotation speed...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 76
ConfidentialHEATER LAMP CONSTRUCTIONThree 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...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 77
ConfidentialTHERMOSTAT CONSTRUCTIONThe Fusing Drive Roller has two thermostats. (One on the Heating Roller and one on 
the Fusing Pressure Roller)
 
When the temperature of the Fusing Roller increases abnormally high, the 
Thermostat will detect it and shut down the power supplied to the heater lamp. This 
controls the High Temperature Protection/Thermostat Protection.FUSING ROLLER PRESSURE/RETRACTION...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 78
Confidential
• Close the Fusing cover when switching the position from Paper jam release to 
the normal. Closing the Fusing cover will return the Release lever to the 
normal position.
Figure 2-71.  Paper jam countermeasure position 2
FUSING ROLLER SMALL AMOUNT ROTATION CONTROLLeaving the printer in the low-power mode for a long period of time may 
deform the pressing part of the Fusing Roller due to...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 79
ConfidentialPAPER WINDING DETECTION CONTROLWith the roller fusing type Fusing Unit, paper jam may cause the paper to wind 
itself to the Fusing Roller. This Winding Detection control monitors the paper 
to detect when it winds itself to the roller lightly so that it can be removed 
easily.
 
Operations are explained below. †
It detects the winding before the roller is completely covered. (The length...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 80
ConfidentialFUSING TEMPERATURE CONTROLWhen with Plain paper, A4 paper (horizontal), single-side 5 sheets, or when 
above the specified temperature inside the printer with the Main Power Switch 
turned ON
TEMPERATURE CONTROL IN THE LOW-POWER MODEIt adjusts the temperature by turning the controlled temperature down to reduce 
the power consumption in standby.PROTECTING FROM THE ABNORMALLY HIGH...