Minolta Di450 Service Manual page 100

22-2. Turnover Control
• The paper transport direction is selected by turning the motor forward or backward.
• A sensor on the paper path is used to determine the timing at which the direction of
motor rotation is switched from backward to forward, or vice versa.
Not Roller Separation
Exit/Duplex Switching Solenoid
SL3
Paper Exit Sensor
PC9
Turnover Feed Entry Sensor
PC7
Turnover Motor
M10
Turnover Roller Switching
Solenoid SL6
Roller Separation
Exit/Duplex Switching Solenoid
SL3
Paper Exit Sensor
PC9
Turnover Feed Entry Sensor
PC7
Turnover Motor
M10
Turnover Roller Retraction
Solenoid SL1
SL6
M10
PC7
PC8
PC27
Synchronizing Roller Motor ON
First Sheet
ON
Not turnover
OFF
H
First Sheet
L
H
L
Forward
Brake
Reverse
Evaluate the FD length
ON
OFF
Synchronizing Roller Motor ON
First Sheet
ON
Turnover
OFF
H
L
First Sheet
H
L
Forward
Brake
Reverse
ON
OFF
CONTROL SIGNAL
PWB-A PJ9A-4B
PWB-A PJ8A-12~15
CONTROL SIGNAL
PWB-A PJ8A-9
PWB-A PJ8A-6
PWB-A PJ8A-3
M-80
Synchronizing Roller sensor OFF
Second Sheet
Turnover
Second Sheet
Energized (ON) if the FD length is 217 mm or more
Synchronizing Roller sensor OFF
Second Sheet
Turnover
First Sheet Second Sheet
Second Sheet
ON OFF
L H
Pulse Output
Blocked Unblocked WIRING DIAGRAM
H L
H L
H L
Second Sheet
4002M598CA
4002M599CA
WIRING DIAGRAM
1 - H
1 - I
1 - H
1 - G
1 - G