Epson Aculaser M 2000 Service Manual

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 61
ConfidentialAUTO TRANSFER VOLTAGE CONTROLTo optimize image transfer output, the machine is provided with auto transfer 
voltage control. The control lets a constant current flow through each of the 
Image Transfer Rollers. Then, from the voltage detected, the resistances of the 
1st Image Transfer Roller, 2nd Transfer Roller, and Transfer Belt are 
measured. The optimum image transfer output voltages...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 62
Confidential2ND TRANSFER ROLLER CLEANING†
In order to remove the remaining toner on the 2nd Transfer Roller, DC 
charge is applied to transfer the remaining toner on the 2nd Transfer Roller 
to the Transfer Belt.
†
The Cleaning Blade then scrapes off the toner on the surface of the 
Transfer Belt.
Figure 2-41.  2nd Transfer Roller cleaning
†
Operation timing„
When the image stabilization control is...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 63
Confidential2.2.10  Toner Collecting section2.2.10.1  Composition
Figure 2-44.  Composition
4038T2C110AA
4039T2C11AA
4038T2C023DA
PU Toner Collecting Screw
Transfer Belt Toner Collecting Screw
Waste Toner Collector4038T2C024DA
Waste Toner Full Sensor (PC8)
Waste Toner Conveyance ScrewWaste Toner Collector 

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 64
Confidential2.2.10.2  Drive
Figure 2-45.  Drive overview
2.2.10.3  OperationTONER COLLECTING MECHANISMToner collected by the Cleaning Blade of the Transfer Belt and waste toner in 
each of the Photoconductor Units are conveyed by the corresponding Toner 
Collecting Screws to the Waste Toner Collector.
Figure 2-46.  Toner collecting mechanism
WASTE TONER COLLECTOR SET DETECTION†
The Waste Toner Full...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 65
ConfidentialWASTE TONER NEAR-FULL/FULL DETECTION CONTROL†
Waste Toner Detection Mechanism„
To prevent false detection, an Agitation Screw is mounted in the Waste 
Toner Collector so that the waste toner is accumulated in the bottle 
evenly.
„
The Waste Toner Full Sensor (PC8) detects the area where the visor A 
mounted on the shaft of the Toner Conveying Screw overlaps with the 
visor B. (As the amount...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 66
Confidential2.2.11  Paper feed section (Standard Cassette)2.2.11.1  Composition
Figure 2-49.  Paper feed section (MP tray)
4038T2C111AA4038T2C172AA
Standard cassette 
Separation Roller Standard cassette Feed Roller Registration Roller Sensor (PC1)
4039T2C113AA
4038T2C026DB
Std. cassette Separation Roller Std. cassette Feed Roller  Std. cassette Paper Empty Sensor (PC10) Std. cassette Paper Feed Clutch...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 67
Confidential2.2.11.2  Drive
Figure 2-50.  Drive overview
2.2.11.3  OperationPAPER TAKE-UP CONTROL
PAPER NEAR-EMPTY/PAPER EMPTY DETECTION†
When the Standard cassette Paper Near-empty Sensor is blocked, a 
corresponding warning display is given on the control panel.
†
The Standard cassette Paper Empty Sensor detects a paper empty 
condition.
Figure 2-51.  Paper Near-Empty/Paper Empty detection...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 68
ConfidentialPAPER SIZE DETECTION CONTROL†
Paper width/length are detected to determine the paper size from their 
combination.
Note * : This combination will also be used due to the sensors ability.
H : BlockingL : Unblocking
Figure 2-52.  Paper size detection control
PAPER INTERVAL CONTROLIt sets the proper interval between papers (pitch) according to the paper size 
and mode for multiple printing.†...

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 69
Confidential2.2.12  Bypass section (MP tray)2.2.12.1  Composition
Figure 2-54.  Composition
4038T2C112AA4039T2C114AA
MP tray Paper Empty Sensor (PC13)
Paper Side Plate
Paper Side Plate
4038T2C181AA
MP tray Feed Roller 
(Bypass)
MP tray Paper Empty Sensor (PC13) Paper Lifting Plate
MP tray Separation Roller 

EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 70
Confidential2.2.12.2  Drive
Figure 2-55.  Drive overview
2.2.12.3  OperationPAPER TAKE-UP CONTROLPAPER EMPTY DETECTIONThe MP tray Paper Empty Sensor (PC13) detects a paper empty condition in 
the Bypass Section.
Figure 2-56.  Paper Empty detection
4038T2C113AA
4039T2C116AA
MP tray Lift-up Sensor (PC14)MP tray Paper Feed Clutch (CL5)
MP tray Paper Pick-up Solenoid (SL2)
MP tray Feed Roller (Bypass)
Main...