Epson C 2900 Manual
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6 - 16 Chapter 6 Principles of Operation
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...](http://img.usermanuals.tech/thumb/23/100561/w64_c-2900-manual-1509489781_d-572.png "Page 573
6 - 16 Chapter 6 Principles of Operation
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...")
6 - 14 Chapter 6 Principles of Operation 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)
6 - 15 Chapter 6 Principles of Operation Epson AcuLaser C2900NRevision B Confidential 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
6 - 16 Chapter 6 Principles of Operation 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]
6 - 17 Chapter 6 Principles of Operation Epson AcuLaser C2900NRevision B 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
6 - 18 Chapter 6 Principles of Operation 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
6 - 19 Chapter 6 Principles of Operation Epson AcuLaser C2900NRevision B 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
6 - 20 Chapter 6 Principles of Operation Epson AcuLaser C2900NRevision B Confidential 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
6 - 21 Chapter 6 Principles of Operation 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
6 - 22 Chapter 6 Principles of Operation Epson AcuLaser C2900NRevision B Confidential 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
6 - 23 Chapter 6 Principles of Operation Epson AcuLaser C2900NRevision B 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