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1st Transfer Section Main Unit Theory of Operation
2-38
II Composition/Operation
Key Name Function/system
[1] Transfer Belt Drive Roller • Drives the Transfer Belt
• Driven by the Intermediate Transport Motor (M3)
• Grounded to allow the 2nd transfer current to flow through
it
[2] 1st Transfer Roller/K • Transfers the toner image from the K Photo Conductor to
the Transfer Belt (1st transfer)
• The transfer voltage (T1) is applied
• The applied transfer voltage (T1) has the same potential
for all four colors
• A transfer Roller retraction mechanism using a Pressure
Cam and a Retraction Lever is provided for all rollers but
the 1st Transfer Roller/K
[3] Pressure Cam • Drives the Sliding Plate
[4] 1st Transfer Roller/C • Transfers the toner image from each color of Photo Con-
ductor to the Transfer Belt (1st transfer)
• The transfer voltage (T1) is applied
• The applied transfer voltage (T1) has the same potential
for all four colors
• The Retraction Lever is operated by an actuator on the
machine side
• The roller is retracted in the ordinary standby state, mono-
chrome mode, and during image stabilization control
[5] 1st Transfer Roller/M
[6] 1st Transfer Roller/Y
[7] Driven Roller • Rotated as driven by the Transfer Belt
[8] Cleaning Blade • Scrapes residual toner off the surface of the Transfer Belt
[9] Toner Collecting Screw • Conveys the toner scraped off by the Cleaning Blade into
the Waste Toner Box
[10] Retraction Position Sensor/1st
Image Transfer (PC9)
• Detects the operating condition of the Sliding Plate
(retraction of the 1st Transfer Roller)
[11] Sliding Plate • Drives the Retraction Lever/Y, M, C
[12] Retraction Lever/Y, M, C • Retracts the 1st Transfer Roller/Y, M, C from the Photo
Conductor/Y, M, C
[13] Transfer Belt • The image of each color of toner is transferred from the
1st Transfer Roller of each color to this Transfer Belt in the
order of Y, M, C, and K, thereby forming a full color toner
image
[14] Pressure/Retraction Clutch/1st
Image Transfer (CL1)
• Transmits the drive from the Intermediate Transport Motor
(M3) to the Pressure Cam
• Presses or retracts the 1st Transfer Roller/Y, M, C.
[15] Intermediate Transport Motor (M3) • Drives the Transfer Belt
• Provides drive also for the conveyance section, 2nd trans-
fer section, media feed section, and other parts
• Brushless DC motor
[16] Toner Collecting Port • Port through which toner conveyed by the Toner Collecting
Screw is dumped into the Waste Toner Box
• Provided with a shutter that prevents toner from being
spilled
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