Epson Aculaser M 2000 Service Manual

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 51
Confidential2.2.8  Toner Supply section2.2.8.1  Composition
Figure 2-26.  Composition
4038T2C004AA
4038T2C014AA
4038T2C015AA
4039T2C109AA
Toner Cartridge/Y, M, C Toner Cartridge/K
Toner Supply 
Drive Section/K
Agitating Blade/K
Toner Supply 
Drive Section/M
Toner Supply 
Drive Section/Y
Toner Supply 
Drive Section/C
Agitating Blade/Y, M, C
Toner Cartridge/K
Toner Cartridge/Y, M, C
EEPROM Board/K
EEPROM Board/Y, M, C 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 52
Confidential2.2.8.2  Drive
Figure 2-27.  Drive overview
2.2.8.3  OperationTONER REPLENISHING MECHANISM/CONTROL†
Toner replenishing mechanism
 
A single Toner Supply Motor is turned either forward or backward to 
supply toner of two different colors (Toner Supply Motor for K and C, and 
Toner Supply Motor for Y and M).
Figure 2-28.  Toner replenishing mechanism
†
Toner replenishing control„
T/C is detected when the Developing Clutch/K (CL4) is energized for 
K or when the Color Developing Motor (M3) is energized for C, M, 
and Y.
„
Based on T/C ratio detected by the TCR sensor and amount of 
consumption calculated by the dot counter, toner replenishing time 
(amount) is determined.
Toner Supply Motor C/K (M7)
Toner Supply Motor Y/M (M6)
Toner Supply 
Motor C/K (M7)
K Toner
C Toner
Toner Supply 
Motor Y/M (M6)
Y Toner
M Toner
Turned forward
Energized
De-energized
Turned forward
Energized
De-energized
Turned backward
De-energized
Energized
Turned backward
De-energized
Energized
One-way Clutch
Toner Supply Motor C/K (M7)
Toner Supply Motor Y/M (M6) 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 53
ConfidentialTONER CARTRIDGE LIFE CONTROL†
Toner Cartridge detection/New unit detection timing„
Detection is controlled by confirming the data of each unit with access 
to IC chip when the front door is closed.
„
Based on the data, the machine confirms if the cartridge is mounted or 
not.
„
After detecting the presence of the cartridge, with the data machine 
checks if the cartridge is new or not.
Figure 2-29.  Toner Cartridge IC Chip
†
Toner Empty detection control
 
A toner empty condition can be divided into 3 groups: Normal, Near-
Empty, Empty„
Toner Near-Empty detection control
 
When new toner is set, toner remaining level is set to IC chip. Based on 
the remaining level, the machine calculates and gives subtraction of the 
toner replenishing amount from the hours which the toner replenishing 
motor has turned. When the level reaches the given amount of toner 
remaining, Toner Near-Empty warning is displayed.
„
Toner Empty control
 
After a near-empty condition is detected, the toner density detected by 
the TCR sensor, at every T/C ratio detection timing, is compared with 
the target toner density. When the value reaches the given level, Toner 
Empty warning is displayed.
SHUTTER MECHANISMTo prevent toner from being spilled when the Toner Cartridge is removed from 
the machine, there is a shutter mechanism provided. When the Toner Cartridge 
is installed in the machine, the shutter opens.
Figure 2-30.  Shutter mechanism
4038T2C015AA
Put the Supply Port face up when Toner Cartridge is 
removed from the machine. Do not open the Shutter with the 
Supply Port faced down.
4038T2C018AA
4038T2C019AA
Before Toner Cartridge is Installed When Toner Cartridge is Installed
Shutter 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 54
Confidential2.2.9  Transfer Corona section2.2.9.1  Composition1ST IMAGE TRANSFER SECTION
Figure 2-31.  Composition
4039T2C110AA
4038T2C105AA
4038T2C151AA
1st Image Transfer 
Roller/Y1st Image Transfer Roller/M
1st Image Transfer 
Roller/C1st Image Transfer Roller/K
2nd Transfer Roller
Retraction Roller
Cleaning BladeTransfer Belt Drive Roller
4038T2C018DB
Pressure Cam
1st Image Transfer Pressure/
Retraction Clutch (CL3)
Fusing Motor (M4)
1st Image Transfer 
Retraction Position 
Sensor (PC6) 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 55
Confidential2ND IMAGE TRANSFER SECTION
Figure 2-32.  Composition
4038T2C019DA
4038T2C106AA
4038T2C152AA
Temperature/Humidity Sensor (SE3)2nd Transfer Roller
Temperature/Humidity Sensor 
(SE3)
IDC/Registration Sensor /1 (SE1) IDC/Registration Sensor /2 (SE2)
4038T2C117AA
4039T2C11AA
2nd Transfer Roller
2nd Image Transfer Pressure 
Position Sensor (PC7)
2nd Image Transfer Pressure/
Retraction Motor (M5)
IDC/Registration Sensor /1 (SE1) IDC/Registration Sensor /2 (SE2)
Shutter
Shutter 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 56
Confidential2.2.9.2  Drive1ST IMAGE TRANSFER SECTION
Figure 2-33.   Drive overview
2ND IMAGE TRANSFER SECTION
Figure 2-34.   Drive overview
4038T2C021DB4038T2C020DA
Transfer Belt
Main Motor (M1)
1st Image Transfer Roller/K
1st Image Transfer Roller/C
1st Image Transfer 
Pressure/Retraction 
Clutch (CL3)
1st Image Transfer 
Retraction Position 
Sensor (PC6)1st Image Transfer Roller/M
1st Image Transfer Roller/Y
Main Motor (M1)
Fusing Drive Motor 
(M4)
Retraction Roller
4038T2C019DA
2nd Transfer Roller
2nd Image Transfer Pressure Position Sensor 
(PC7)
2nd Image Transfer Pressure/
Retraction Motor (M5)
IDC/Registration Sensor/1 (SE1) Shutter
IDC/Registration
Sensor/2 (SE2)
Cam
Pressure Lever
Shutter 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 57
Confidential2.2.9.3  OperationTRANSFER BELT DRIVE MECHANISM†
The Transfer Belt is driven by the Main Motor (M1).
†
Revolving speed of the Main Motor (M1) can be switched by the motor 
clock.
1ST IMAGE TRANSFER ROLLER MECHANISM†
Pressure/Retraction mechanism is equipped for pressing the 1st Image 
Transfer Rollers (Y, M, C) to inside the Transfer Belt at the 1st image 
transfer.
†
The 1st Image Transfer Roller (K) does not have Pressure/Retraction 
mechanism. The 1st Image Transfer Roller (K) always presses the Transfer 
Belt to the PC Drum (K).
†
Driving force is transferred from the Fusing Motor (M4) to the Pressure/
Retraction mechanism through the 1st Image Transfer Pressure/Retraction 
Clutch (CL3).
†
The 1st Image Transfer Retraction Position Sensor (PC6) detects the 1st 
Image Transfer Roller at its retracted position.
†
Pressure/retraction operation„
Pressure operation
1. Rotation of the Fusing Drive Motor (M4) is transferred to the 1st Image 
Transfer Pressure/Retraction Clutch (CL3).
2. When the 1st Image Transfer Pressure/Retraction Clutch (CL3) is turned ON, 
the rotation of the Fusing Drive Motor (M4) is transferred to the drive gear.
3. Rotation of the drive gear turns the pressure cam, which allows the Sliding 
Plate to move.
4. The 1st Image Transfer Roller (Y, M, and C) will move down to be pressed to 
the Transfer Belt when the sliding plate moves.
5. The slide plate moves the Actuator for the 1st Image Transfer Retraction 
Position Sensor up.
6. The Actuator blocks the 1st Image Transfer Retraction Position Sensor (PC6) 
to detect the slide plate’s movement.7. Turn the 1st Image Transfer Pressure/Retraction Clutch (CL3) OFF.
8. The Cam will stop rotating and the siding plate will stop.
9. The 1st Image Transfer Roller (Y, M, and C) will stay being pressed.
„
Retraction operation
1. The rotation of the Fusing Drive Motor (M4) will be transferred to the 1st 
Image Transfer Pressure/Retraction Clutch (CL3).
2.  When the 1st Image Transfer Pressure/Retraction Clutch (CL3) is turned ON, 
rotation of the Fusing Drive Motor (M4) will be transferred to the drive gear.
3. The Cam will rotate to move the sliding plate as the drive gear rotates.
4. The 1st Image Transfer Roller (Y, M, and C) will move up to retract from the 
Transfer Belt as the sliding plate moves.
5. The slide plate moves the Actuator for the 1st Image Transfer Retraction 
Position Sensor down.
6. The Actuator unblocks the 1st Image Transfer Retraction Position Sensor 
(PC6) to detect the slide’s movement.
7. Turn the 1st Image Transfer Pressure/Retraction Clutch (CL3) OFF.
8. The Cam will stop rotating to stop the sliding plate.
9. The 1st Image Transfer Roller (Y, M, and C) will keep their retraction 
position.
Figure 2-35.  Pressure/Retraction mechanism
4038T2C021D
B
1st Image Transfer Pressure/
Retraction Clutch (CL3)Fusing Drive 
Motor (M4)Main Motor (M4) 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 58
Confidential†
Operation timing
†
Pressure position changing mechanism„
To extend the service life of the PC Drum/Y, M, C, the pressure 
position of the 1st Image Transfer Roller is changed between the 
monochrome mode and the color mode. In the monochrome mode, the 
1st Image Transfer Roller/Y, M, C is left in the retracted position and 
the PC Drum/Y, M, C is stopped.
„
Color mode:
• The pressure position of the Image Transfer Roller is where the PC Drum is in 
contact with the Transfer Belt for all four colors of toner.• In order to transfer the original without missing any part, a Retraction Roller 
is mounted at the 1st Image Transfer Roller/Y so the 1st Image Transfer 
Roller/Y will properly contact to the PC Drum/Y.„
Monochrome mode:
 
The pressure position of the Image Transfer Roller/Y, M, C is where 
the PC Drum/Y, M, C leaves the Transfer Belt. While that of the Image 
Transfer Roller/K is where the PC Drum/K is in contact with the 
Transfer Belt. This allows the PC Drum/Y, M, C to remain stationary 
in this mode.
Figure 2-36.  Monochrome Mode
Figure 2-37.  Color Mode
4038T2C136AA
Fusing Drive Motor (M4)
1st Image Transfer Pressure/Retraction 
Clutch (CL3)
1st Image Transfer Retraction Position 
Sensor (PC6)
Paper Moves Past 2nd Transfer Roller Start Key ON
4038T2C162AA
1st Image Transfer Roller
Transfer Belt
PC Drum
4038T2C163AA
Retraction Roller 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 59
Confidential2ND TRANSFER ROLLER PRESSURE MECHANISMThe 2nd Transfer Roller has the Pressure/Retraction mechanism which presses 
to and retracts from the Transfer Belt so the patterns made on the Transfer Belt 
except by printing (such as detection pattern during Image Stabilization) will 
not affect the 2nd Transfer Roller.†
Pressure/retraction operation1. Drive from the 2nd Image Transfer Pressure/Retraction Motor is transmitted 
through a gear train to the drive gear.
2. The drive gear rotates to rotate the Cam half way. Releasing the Pressure 
lever will press the 2nd Transfer Roller to the Transfer Belt.
3. At this time, the 2nd Image Transfer Pressure Position Sensor detects whether 
the 2nd Transfer Roller is located at the pressure position.
4. The Cam will rotate half way when the Motor turns ON again. Moving the 
Pressure lever down will move the 2nd Transfer Roller to the retraction 
position and will stop.
Figure 2-38.  Pressure/Retraction Operation overview
†
Operation Timing
4038T2C168AA
4038T2C167AA
When PressedWhen Retracted
Drive Roller2nd Transfer Roller
Cam
Pressure Lever
4038T2C022DA
2nd Image Transfer 
Pressure/Retraction 
Motor (M5)
2nd Image Transfer Pressure 
Position Sensor (PC7)Cam
Pressure Lever
4038T2C136AA
Main Motor (M1)2nd Image Transfer Pressure/Retraction 
Motor (M5)
2nd Image Transfer Pressure Position Sensor 
(PC7)
Paper moves past 2nd Transfer Roller
Start Key ON 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 60
ConfidentialIDC SENSOR SHUTTER MECHANISM†
The IDC Sensor can be contaminated with toner since it is located under 
the Transfer Belt. There is a shutter mechanism provided for the sensor to 
prevent it from being contaminated.
†
The shutter opens and closes in synchronism with the pressure and 
retraction motion of the 2nd Transfer Roller. „
The Cam will press the Pressure lever to open the shutter on the IDC 
Sensor during retraction.
„
The Cam will press the Pressure lever to close the shutter on the IDC 
Sensor while the roller is pressing.
†
Shutter Open/Close Operation1. Drive from the 2nd Image Transfer Pressure/Retraction Motor is transmitted 
through a gear train to the drive gear.
2. The drive gear will rotate to turn the Cam half way. Pressing the Pressure 
lever down will open the shutter.
3. Turning the motor ON again will turn the Cam half way. Releasing the 
Pressure lever will close the shutter.
Figure 2-39.  Shutter Open/Close Operation
6%##
2nd Image Transfer Pressure/Retraction Motor (M5)
Shutter IDC/Registration 
Sensor/2 (SE2)
IDC/Registration 
Sensor/1 (SE1)
Shutter
Shutter is closed
Shutter is open
Image 
transfer 
Roller 
Operation
Pressure Retraction
Lever 
OperationOutside
4038T2C169AA
4038T2C170AA
4038T2C108AA
4038T2C107AA