Epson Aculaser M 2000 Service Manual

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 81
Confidential2.2.15  Paper exit section2.2.15.1  Composition
Figure 2-73.  Composition
2.2.15.2  Drive
Figure 2-74.  Drive overview
4039T2C125AA
4038T2C192AA
4039T2C120AA
Paper Exit Roller
Paper Exit Roller
Exit Sensor Charge 
Neutralizing 
Brush
4039T2C127AA
Fusing Drive Motor 
(M4)
Paper Exit Roller/1 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 82
Confidential2.2.16  Image stabilization controlStabilizes printed images by adjusting developing bias potential and laser 
intensity. Also, to prevent color misalignment, control the registration 
correction.2.2.16.1  OverviewThe machine provides the following image stabilization control to maintain the 
printed image quality.Note *1 : Refer to 
Registration Control (Color Shift Correction) System (p40)
.
*2 : Refer to 
TCR Sensor control (p50)
.
*3 : Refer to 
Auto Transfer Voltage Control (p61)
.
2.2.16.2  Operation timing
Table 2-10.  Image stabilization control
Purpose
Control
Control Means
To stabilize image densityTo stabilize gradation
• IDC intensity control• Max. density control• LD intensity adjustment Control• Registration control (color shift 
correction)
*1
• Gamma correction control
IDC/Registration SensorTemperature/Humidity 
Sensor
To stabilize toner density
TCR Control (Y,M,C,K)
*2
TCR Sensor
To stabilize image transfer
Image transfer output control
*3
• 1st image transfer auto transfer 
voltage control• 2nd image transfer auto transfer 
voltage control
Temperature/Humidity 
Sensor
Table 2-11.  Image stabilization control
Mode
Operation timing
Mode 1
 
Initialized 
stabilization
• A new PU is detected.• A new transfer belt unit is detected.• Calibration of the Printer Adjust Menu is executed from the operation 
panel.• Empty is released.• Previous image stabilization is failed.
Mode 2
 
Periodical 
stabilization
The number of prints made predetermined counts after the previous image 
stabilization (mode 1, 2, 3).
Mode 3
 
Normal 
stabilization
• Power switch is turned ON, right cover is opened and closed (only when 
PU and transfer belt are new), front door is opened and closed, the DEEP 
SLEEP mode is released, panel displays stabilization mode.• The number of prints made predetermined counts after the previous image 
stabilization (mode 1, 3).• When the number of prints made predetermined counts after the previous 
image stabilization (mode 1, 2, 3), temperature change that exceeds 
threshold is detected.• When the number of prints made predetermined counts after the previous 
image stabilization (mode 1, 2, 3), environment (temperature/humidity) 
change that exceeds threshold is detected.• When the print job is completed, given level of temperature change
* is 
detected.
• When the print job is completed, environment (temperature/humidity) 
change that exceeds threshold is detected after the previous stabilization 
(mode 1, 2, 3). 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 83
Confidential2.2.17  Life managementThe following table shows the information about the life of consumable products and periodic replacement parts.
Type
Unit
Status
Life detection
Parts attributed 
life
Panel display
Solution
continued 
on 
printing
Image 
quality
New unit detection
(Reset counter)
Dictate Unit
Message
Error
LED
Consumable 
productsToner Cartridge Near-
Empty
The toner supplying amount is calculated from the 
hours which the Toner Supply Motor has turned. 
When the amount reaches the given value, the 
condition becomes Near-Empty.
Toner Supply 
Motoruuuu Toner Low --- Prepare a new unit Available Warranty The life counter is 
automatically reset if 
the newly installed 
cartridge is judged as 
new by checking the 
new status of the 
flag stored in the IC 
chip on the cartridge.IC chip in 
the cartridge
Empty
When the printer is under Near-Empty condition, 
the toner density detected by the TCR sensor is 
compared with the target toner density. When the 
density difference reaches the given level, condition 
becomes Empty. 
TCR Sensor Replace Toner 
uuuuLight Replace with a new unit Not 
Available---
Photoconductor 
UnitNear-
EmptyCondition becomes Near-Empty when any of the 
following values reaches the given value.
• Rotating time of the PC Drum• Rotating time of the PC Drum which calculated  from 
the hours which the Developing Roller has turned.
•Main Motor
•Color PC motor
•Color 
Developing 
MotorPhotocon uuuu 
Needed Soon--- Prepare a new unit Available  Warranty The life counter is 
automatically reset if 
the newly installed 
cartridge is judged as 
new by checking the 
new status of the 
flag stored in the IC 
chip on the cartridge.IC chip in 
the cartridge
Empty Condition becomes Empty when any of the 
following values reaches the given value.
• Rotating time of the PC Drum• Rotating time of the PC Drum which calculated  from 
the hours which the Developing Roller has turned.
Replace 
Photocon uuuuFlash [READY] Push down the 
switch to Eco-printing 
modeAvailable Out of 
warranty
Eco-
printing 
modeUnder Eco-printing mode, printer will suspend 
when the specified number of papers are printed.--- Replace 
Photocon uuuu---
• [READY] Push down 
the switch to continue 
Eco-printing mode 
Replace with a new unit
Available Out of 
warranty
Empty 2 Condition becomes Empty 2 when any of the 
following values reaches the given value.
• Rotating time of the PC Drum• Rotating time of the PC Drum which calculated  from 
the hours which the Developing Roller has turned.
•Main Motor
• Color Pc Motor
•Color 
Developing 
MotorReplace 
Photocon uuuuLight Replace with a new unit Not 
Available---
Waste Toner 
CollectorNear-
EmptyCondition becomes Near-Empty when the time 
for photo interrupter sensor to detect two Light 
Shield Plates mounted on a rotating shaft of the 
Agitator screw in the Waste Toner Collector 
reaches within the range of the given value.Waste Toner Full 
SensorWaste Toner Box 
Near Full--- Prepare a new unit Available Warranty NO New unit 
detection mechanismWaste Toner 
Full Sensor
Empty Condition becomes Empty when the time for 
photo interrupter sensor to detect two Light 
Shield Plates mounted on a rotating shaft of the 
Agitator screw in the Waste Toner Collector 
reaches within the range of the given value.Replace Waste 
Toner BoxLight Replace with a new unit Not 
Available--- 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating Principle of Main Unit Mechanism 84
ConfidentialNote * : Continuing on printing is available until the power is turned OFF. When the Power is turned ON again, the status will become Near-Empty. Periodic 
replacement 
partsFusing Unit Near-
EmptyCondition becomes Near-Empty when any of the 
following values reaches the given value.
• Number of prints (Paper more than 216 mm in 
Sub Scan Direction is two counts)
• Value of the hours which the Fusing Motor has 
turned is converted into the number of printsFusing Motor Fuser Needed 
Soon--- Prepare a new unit Available Warranty When Fuse for new 
unit detection is 
conducted, unit is 
judged as new unit 
and counter is reset 
automatically.Detection for 
connector 
connection
Near-
Empty 2Condition becomes Empty 2 when any of the 
following values reaches the given value.
• Number of prints (Paper more than 216 mm in 
Sub Scan Direction is two counts)
• Value of the hours which the Fusing Motor has 
turned converted into the number of printsReplace Fuser --- Change to Empty 
condition by receiving 
job.--- ---
Empty Condition becomes Empty when the print job is 
received in the condition of Near-Empty 2--- Replace Fuser Flash• Continue on printing 
by pushing down 
[Start/Stop] to disable 
the error
*.
• Replace with a new unit
Available Out of 
warranty
Empty 2 Condition becomes Empty 2 when number of 
prints reach the given numbers to print.--- Replace Fuser Light Replace with a new unit Not 
Available---
Transfer Belt 
UnitNear-
EmptyCondition becomes Near-Empty when the hours 
which the Transfer Belt has turned reached the 
given time.Main Motor Transfer Unit 
Needed Soon--- Prepare a new unit Available Warranty When Fuse for new 
unit detection is 
conducted, unit is 
judged as new unit 
and counter is reset 
automatically.1st Image 
Transfer 
Pressure 
Retraction 
Sensor Near-
Empty 2Condition becomes Near-Empty 2 when the 
hours which the Transfer Belt has turned reached 
the given time.Replace Transfer 
Unit--- Change to Empty 
condition by receiving 
job.--- ---
Empty Condition becomes Empty when the print job is 
received in the condition of Near-Empty 2--- Replace Transfer 
UnitFlash• Continue on printing 
by pushing down 
[Start/Stop] to disable 
the error.
• Replace with a new unit
Available Out of 
warranty
Maintenance Unit/
Feed Roller/
Separation Roller
Near-
EmptyCondition becomes Near-Empty when number of 
prints reach the given value (count is paper-size 
independent).Feed Roller/
Separation RollerReplace 
Maintenance 
Unit/Replace 
Feed Roller xx--- Prepare a new unit Available Warranty Reset the counter 
manually from 
Maintenance Menu.None
Empty Condition becomes Empty when number of prints 
reach the given value (count is paper-size 
independent).Replace 
Maintenance 
Unit/Replace 
Feed Roller xxFlash• Continue on printing 
by pushing down 
[Start/Stop] to disable 
the error.
• Replace with a new unit
Available Out of 
warranty
Type
Unit
Status
Life detection
Parts attributed 
life
Panel display
Solution
continued 
on 
printing
Image 
quality
New unit detection
(Reset counter)
Dictate Unit
Message
Error
LED 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating principle of Option mechanism 85
Confidential2.3  Operating principle of Option mechanism2.3.1  Optional Cassette2.3.1.1  Composition
Figure 2-75.  Composition 1
Figure 2-76.  Composition 2
4038T2C172AA
Feed Roller Paper Take-Up Sensor (PC9-PC)Vertical Transport Sensor 
(PC8-PC)
Vertical Transport 
Roller/2
4038T2C127AA
Feed Roller
Separation Roller
4037T2C532AA
Paper Empty Sensor 
(PC6-PC) Paper Feed Motor (M1-PC) Vertical Transport Motor (M2-PC) Paper Near-Empty Sensor (PC1-PC)
Lift-up Motor (M3-PC)
CD Paper Size Sensor/1 (PC4-PC) Device Detection Sensor 
(PC2-PC)
CD Paper Size Sensor/2 (PC3-
PC)
Paper Size Board (PWB-I-PC)Control Board  
(PWB-Z-PC)
Lift-up Sensor (PC7-PC)
Paper Take-up Sensor (PC9-PC) 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating principle of Option mechanism 86
Confidential2.3.1.2  Drive
Figure 2-77.  Drive overview
PAPER SUPPLY LEVEL DETECTION CONTROL†
Paper supply level is indicated in the window of the Cassette Front Cover. 
(Only for the Optional Cassette)
†
When the Paper Lifting Plate goes up, in conjunction with its position, the 
Red Lever appears in the window. Red area appeared in the window 
indicates paper supply level, and their relationship is as follows. 
 
 Decreasing Paper Supply Level 
→ 
Increasing the area of the Red 
Lever appeared in the window 
Figure 2-78.  Controlling for Paper Supply Level
PAPER NEAR-EMPTY/PAPER EMPTY DETECTION
Figure 2-79.  Paper Near-Empty/Paper Empty detection
4038T2C028DA
Vertical Transport Roller Paper Feed Roller
Feed Roller
Lifting Plate
Vertical Transport Motor (M2-PC) Lift-up Motor  
(M3-PC)Paper Feed Motor (M1-PC)
4038T2C215AA
4038T2C216AA
Lever Paper Supply Level Indicator in Cassette Front Cover
4036ma2612c0
4036ma2017c1
Paper Empty Sensor (PC6-PC)
An Empty Condition A Near-empty Condition
Paper Near-empty Sensor (PC1-PC)
Lift-up Motor  
(M3-PC) 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating principle of Option mechanism 87
ConfidentialNote H : Blocking
L : Unblocking
Figure 2-80.  Paper size detection control
Table 2-12.  Paper size detection control (Optional Cassette)
Paper Size
Optional Cassette
Paper Size Board (PWB-I)
Optional Cassette 
CD Size Sensor/1
(PC4-PC)
Optional Cassette 
CD Size Sensor/2
(PC3-PC)
SW1
SW2
SW3
SW4
A3
ONON/
OFFON ON H L
B4 ON ON ON OFF H L
A4R
OFFON/
OFFON ON L H
A4 ON/
OFFOFF OFF OFF H L
B5R OFF OFF ON OFF L L
B5 ON ON OFF OFF H L
A5R ON/
OFFOFF OFF OFF L L
11 x 17 ON OFF ON ON H H
Legal ONONONOFF L H
Letter R ON OFF OFF ON L H
Letter OFF OFF OFF OFF H H
4036ma2043c1
1 2
3 4
GuidePaper Size Board (PWB-I) 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating principle of Option mechanism 88
ConfidentialPAPER LIFTING MOTION CONTROL†
When Tray is slid in„
When the Lift-Up Sensor (PC7-PC) of the Optional Cassette is 
unblocked (OFF) with the Optional Cassette being closed, the Lift-Up 
Motor (M3-PC) of the Optional Cassette will rotate to start lifting up 
the Paper Lifting Plate.
„
When the Lift-Up Sensor (PC7-PC) of the Optional Cassette is blocked 
(ON) after the Paper Lifting Plate starts moving up, the Lift-Up Motor 
(M3-PC) of the Optional Cassette will stop to finish lifting the Paper 
Lifting Plate. Figure 2-81.  Paper lifting motion control of the Optional Cassette 
(When Tray is slid in)
†
Timing for Motion
†
During a print cycle„
When the amount of paper decreases as the Unit keeps printing, the 
Feed Roller will gradually come down to unblock the Lift-Up Sensor 
(PC7-PC) of the Optional Cassette. The Lift-Up Motor (M3-PC) will 
rotate again to lift up the Paper Lifting Plate.
„
When the Lift-Up Sensor (PC7-PC) is blocked (ON), the Lift-Up 
Motor (M3-PC) of the Optional Cassette will stop to finish lifting the 
Paper Lifting Plate.
„
The sequence of these operations is repeated to keep constant the 
pressure between the Paper Take-up Roller and paper stack (paper 
take-up pressure) regardless of the amount of paper still available for 
use.
Figure 2-82.  Paper lifting motion control of the Optional Cassette (During a print cycle)
4036ma2607c0
4036ma2232c0
Lift-up Sensor (PC7-PC)
Paper Lifting Plate Lift-up Motor (M3-PC)
4038T2C141AA
Set Sensor (PC2-PC)
Lift-up Sensor (PC7-PC)
Lift-up Motor (M3-PC)Slid in Lifting Completed
4036ma2232c0
4036ma2233c0
Lift-up Sensor (PC7-PC) 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating principle of Option mechanism 89
Confidential2.3.2  Duplex Unit2.3.2.1  Composition
Figure 2-83.  Composition
Figure 2-84.  Paper Feed Path
4066T2C514DA
Transport section
Switchback section
4066T1J500DA
Switchback to Main Body
Paper is fed into the main body again 
						

							EPSON AcuLaser C9200NRevision D
OPERATING PRINCIPLES      Operating principle of Option mechanism 90
Confidential2.3.2.2  DriveSWITCHBACK DRIVE
Figure 2-85.  Drive overview
TRANSPORT DRIVE
Figure 2-86.  Drive overview
4066T2C517DA
Paper Exit Roller/2Switchback Motor (M1 DU)
Main BodyDuplex Unit
Paper Exit Roller/1
Duplex Control Board 
(PWB-A DU)Duplex Unit Transport 
Motor (M2 DU)
Duplex Unit Transport Roller 1
Duplex Unit Transport Roller 2
Duplex Unit Transport Roller 3