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Main Unit Theory of Operation 1st Transfer Section
2-41
II Composition/Operation
8.3.3 1st Transfer Roller pressure/retraction control
• To extend the service life of the Photo Conductor/Y, M, C, the pressure position of the 1st
Transfer Roller is changed between the monochrome mode and the color mode.
The 1st Transfer Roller/K is not provided with a retraction mechanism; the Transfer Belt is
pressed against the Photo Conductor/K at all times.
• The Intermediate Transport Motor (M3) provides the drive for pressure/retraction opera-
tion of the 1st Transfer Roller/Y, M, C. The pressure/retraction sequence is carried out
while the Intermediate Transport Motor (M3) and Color PC Drum Motor (M2) turn evenly.
A. Monochrome mode
• The 1st Transfer Roller/Y, M, C is moved inward the unit (for retraction) and the Photo
Conductor/Y, M, C is stopped. The transfer roller is moved (retracted) and the Photo
Conductor is stopped also in the ordinary standby state.
B. Color mode
• During the 1st transfer in the color mode, the 1st Transfer Roller/Y, M, C is moved toward
the Photo Conductor (pressed) so that Transfer Belt is pressed against the Photo Con-
ductor.
C. Others
• The transfer roller is moved (retracted) and the Photo Conductor is stopped in the ordi-
nary standby state.
D. Pressure operation
1. Rotation of the Intermediate Transport Motor (M3) is transmitted by a gear train to the
Pressure/Retraction Clutch/1st Image Transfer (CL4).
2. Rotation of the Pressure/Retraction Clutch/1st Image Transfer (CL4) turns the Pressure
Cam, which moves the Sliding Plate.
3. As the Sliding Plate moves, the Retraction Lever turns.
4. As the Retraction Lever turns, the 1st Transfer Roller is pressed against the Transfer
Belt.
4138to2044c1
Sliding Plate Pressure Cam
Retraction Lever
1st Transfer Roller
Photo Conductor
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