18-5.Pressure Position Changing Mechanism - Minolta CF1501 Service Manual

18-5. Pressure Position Changing Mechanism
• The pressure position of the Y, M, and C Image Transfer Rollers is made different from
that of the Bk Image Transfer Roller in the monochrome mode by changing the pulse
count of the 1st Image Transfer Pressure/Retraction Motor.
• Changing the motor pulse count results in the position at which each of the Image Trans-
fer Rollers is pressed against the Transfer Belt being changed through a cam.
1. Monochrome mode
• The pressure position in the monochrome mode is where only the Bk PC Drum is in con-
tact with the Transfer Belt.
• The Y, M, and C PC Drums leave the Transfer Belt, which allows the Y, M, and C PC
Drums to remain stationary in this mode, extending the service life of the PC Drums.
2. Color Mode
• The pressure position of the Image Transfer Rollers is where the PC Drum is in contact
with the Transfer Belt for all four colors.
Retracted
Position
Monochrome
Mode
Color Mode
Retraction Roller
Cam Position A
Y M
Cam Position B
Y M
Cam Position C
Y M
Transfer Belt
1st Image Transfer Roller
M-72
Sliding Plate
Bk
C
Bk
C
C Bk
PC Drum
Lifting Mylar
4004M592AA