Sharp SF-2020 Service Manual page 48

2
4 9
2) Details of operation
1 The alignment plate and the rear edge plate detect the home
positions, and moves to the paper size position. (ADU motor 1, 2,
ON)
2 Paper exit, reverse unit operation (ADU gate solenoid ON)
3 Rollers in the ADU rotate in the direction of paper entry. (ADU
drive motor ON)
4 ADU paper entry detection (ADU paper entry/exit sensors 1, 2
ON)
5 ADU paper presence detection (ADU paper sensors 1, 2 ON)
5
( -1 is used only in the AB series.)
6 Rollers in the ADU rotate in the direction of paper exit. (ADU drive
motor ON)
7 Holding plate operation (Take-up clutch ON)
8 Take-up roller. paper feed roller rotation (Paper feed clutch ON)
9 ADU paper feed detection (ADU paper entry, exit sensor ON)
F ADU paper transport detection (ADU transport sensor ON)
ADU sensor list
Signal name
DPHPS1
DPHPS2
DPED1
DPPD1
DPED2
DPOD
DPTD
5 -1
8 7
Name
Alignment plate home position sensor
Rear edge plate home position sensor
Paper sensor 1
Paper entry sensor
Paper sensor 2
Paper exit sensor
DDM rotary encoder sensor
DPTD
(DDM rotary encoder sensor)
3 6
5 1
-2
DPHPS1
(Alignment plate home position sensor)
Type
Transmission sensor
Transmission sensor
Transmission sensor
Transmission sensor
Transmission sensor
Transmission sensor
Transmission sensor
5 – 18
10
1
Operation, function
LOW at home position
LOW at home position
HIGH with paper present
HIGH with paper present
HIGH with paper present
HIGH with paper present
Motor rotation detection