Epson C 2900 Manual

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Epson AcuLaser C2900NRevision B
Confidential 1.3.8 Waste Toner Collection
(1)  The excess toner is collected by the cleaner blade contacting the drum, and then carried to the 
AUGER CLNG SIDE by the Auger.
(2)  The toner is carried by the AUGER CLNG SIDE to the joint to the collection box in the toner car-
tridge.
(3)  The toner then falls into the collection box in the toner cartridge.
Wsb06006KA
Toner CartridgeCollection BoxAUGER CLNG SIDE
Auger
Cleaner Blade 1) 2)
3) 
						

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2. Paper Path
2.1 Paper Path
MiS06005SA
SSI
Top Cover Duplex ModuleTray 2
Tray 1
Regi Assy
Transfer ASSY
Fusing
Exit Roll in the Fuser UnitMotor drive / Solenoid /
Feed RollMultiple Sheet feed
Prevention
Multiple Sheet feed
Prevention
Lead edag
registration (except SSI) Motor drive / Solenoid /
Feed Roll
Motor drive / Clutch /
Regi Roll
Motor drive / Clutch /
Exit Roll
Motor drive / Clutch /
Dup RollMotor drive / Heat Roll /
Pressure Belt Motor drive / Belt 
						

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Epson AcuLaser C2900NRevision B
Confidential
2.2 Layout of Paper Path
MiS06006SA
:  Laser beam
:  Paper transfer
:  Paper sensors
Exit roll [Fuser Unit]
Dup Gate [Fuser Unit]
Heat roll [Fuser Unit]
Belt [Transfer Belt] Pressure belt [Fuser Unit]
Regi roll (rubber)
[Regi Assembly]Dup roll (rubber)
[Duplex] Exit Sensor [Fuser Unit]
Regi roll (metal)
[Regi Assembly]
Turn roll (metal)
[Feeder Assy  Opt.]
Turn roll (rubber)
[Feeder Assy  Opt.]
SSI No Paper Sensor
[Regi Assembly]
Regi Sensor
[Regi Assembly]
Paper Path Sensor
[Feeder Assy  Opt.]
Retard roller
[Tray 1]
Retard roller
[Tray 2] Tray2 No Paper Sensor
[Feeder Assy  Opt.] Tray1 No Paper Sensor
[Feeder Assy]
Feed roll
[Feeder Assy  Opt.] Feed roll
[Feeder Assy]
Dup roll (rubber)
[Duplex] 
						

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Confidential
2.3 Feeding from Paper Tray
When the paper tray is inserted into the feeder section, the projections on the CHASSIS FDR L 
(PL3.1.8) and the CHASSIS FDR R (PL3.1.4) press the LATCH BOTTOM L (PL2.1.14) and the LATCH 
BOTTOM R (PL2.1.15) inward until they are unlocked.
This allows the PLATE ASSY BOTTOM (PL2.1.2) to be lifted by the spring pressure of the SPRING N/
F L (PL2.1.3) and SPRING N/F R (PL2.1.4) to the position where it can feed sheets.
Upon the start of sheet feeding from the paper tray, the ROLL ASSY FEED (PL3.2.4) starts rotating 
driven by the torque from the DRIVE ASSY MAIN (PL7.1.2) under control of the SOLENOID FEED MSI 
(PL3.1.11) to feed the sheets to the REGI ROLL (ROLL REGI METAL: PL3.2.10/ROLL ASSY REGI: 
PL3.2.9).
MiS06023SA
LATCH BOTTOM R
LATCH BOTTOM L
SPRING N/F L PLATE ASSY  BOTTOM
ROLL ASSY  FEED
Retard Roller
SPRING N/F R 
						

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Epson AcuLaser C2900NRevision B
Confidential 2.3.1 Multiple Sheet Feed Prevention
The sheets set in a tray is occasionally stuck together along the edges. The stuck sheets cause a mul-
tiple sheet feed or a jam. The sheets are fed by the ROLL ASSY FEED (PL3.2.4) to a position between 
the ROLL ASSY FEED and the Retard Roller (HOLDER ASSY RETARD: PL2.1.5). Normally, when 
only one sheet is fed, both the ROLL ASSY FEED and Retard Roller rotate to allow the sheet to pass. 
However, when two sheets are fed concurrently, only the ROLL ASSY FEED rotates and the Retard 
Roller is locked thereby allowing the upper sheet to pass by being separated from the lower sheet that 
is stopped by the friction with the Retard Roller at rest.
The Retard Roller is being pushed toward the ROLL ASSY FEED by spring pressure, and controlled by 
the torque limiter (Clutch Assy Friction) with which it is coupled.
MiS06024SA
Clutch Assy  Friction
ROLL ASSY  FEED
Retard Roller
Retard Roller 
						

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Confidential
2.4 Feeding from Single Sheet Inserter (SSI)
When a sheet is loaded on the SSI, the REGI ROLL (ROLL ASSY REGI: PL3.2.9) rotates by the torque 
from the DRIVE ASSY MAIN (PL7.1.2) under control of the CLUTCH ASSY DRV (PL3.1.1) to feed the 
sheet to the toner transfer section (TRANSFER ASSY: PL6.1.7).
REGI ROLL
CLUTCH ASSY  DRV
Paper
REGI ROLL
MiS06025SA 
						

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2.5 Feeding in Registration Section
The sheet fed to the registration section from the paper tray, SSI, or duplex section is fed to the toner 
transfer section (TRANSFER ASSY: PL6.1.7) by the REGI ROLL (ROLL ASSY REGI: PL3.2.9) that 
rotates by the torque from the DRIVE ASSY MAIN (PL7.1.2) under control of the CLUTCH ASSY DRV 
(PL3.1.1).
From the duplex section to the registration section, the sheet is fed by the rotation of the ROLL ASSY 
DUP (PL11.2.9). (Refer to 2.7 Feeding in Duplex Section)
At the registration section, the lead edge position of the sheet is corrected (Refer to Lead-edge Regis-
tration) before the sheets are fed to the toner transfer section (TRANSFER ASSY: PL6.1.7).
MiS06026SA
REGI ROLL
CLUTCH ASSY  DRV
REGI ROLLREGI ROLL
REGI ROLL
ROLL ASSY
DUP
From Paper tray From SSIFrom Duplex
Paper 
						

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Epson AcuLaser C2900NRevision B
Confidential 2.5.1 Lead-edge Registration
When a sheet is fed from the SSI, paper tray or Duplex to the toner transfer position, the registration of 
the sheet may not be correctly maintained due to such troubles as misalignment of lead edges in the 
paper tray. To avoid this trouble, the lead edge position needs to be aligned at the registration section 
before the sheet is fed to the toner transfer position.
By thrusting the edge of the sheet coming out of the SSI or paper tray against the REGI ROLL (ROLL 
REGI METAL: PL 3.2.10 / ROLL ASSY REGI: PL 3.2.9) that is locked, the lead edge of the sheet is reg-
istered.
MiS06010KA ROLL REGI METAL
ROLL ASSY  REGI
REGI ROLL
Skewed Paper 
						

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2.6 Transfer/Fusing/Exit
The sheet that has passed through the REGI ROLL goes into the TRANSFER ASSY (PL6.1.7) that 
rotates by the torque from the DRIVE ASSY MAIN (PL7.1.2), where the toner image is transferred from 
the belt to the sheet. Then, the sheet is fed to the exit section while its toner image is being fused in the 
FUSER UNIT (PL6.1.1) by the Heat Roll that rotates by the torque from the DRIVE ASSY SUB 
(PL7.1.1).
The print-completed sheet (1 side-printed or 2 side-printed) is ejected from the printer by the ROLL 
ASSY EXIT that rotates in the exit direction by the torque from the DRIVE ASSY SUB.
Transfer ASSY Drum (K)ROLL ASSY  EXIT
Pressure Belt
Drum (C)
Drum (M)
Drum (Y)Heat Roll
MiS06027SA 
						

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Confidential
2.7 Feeding in Duplex Section
After the 1 side-printed sheet is ejected from the FUSER UNIT, the ROLL ASSY EXIT guides the sheet 
to the duplex section by rotating in the reverse direction by the torque from the ROLL ASSY EXIT under 
control of CLUTCH ASSY EXIT.
From the duplex section, the 1 side-printed sheet is fed to the registration section by the ROLLER 
ASSY DUP (PL11.2.9) that rotates by the torque from the DRIVE ASSY DUP (PL11.2.5).
After the printing on the side 2 is completed, the sheet exits in the same manner as it does after the 
printing on the side 1 is completed.
MiS06028SA
ROLL ASSY  EXIT
CLUTCH ASSY  EXIT
ROLL ASSY  EXIT
ROLLER ASSY  DUP
CLUTCH ASSY  EXIT
DRIVE ASSY  EXIT
DRIVE ASSY  DUP