Sony UP-D70 Service Manual page 56

j) PATH 1 sensor (CN5-17)
Function : This sensor detects rotation of stepping motor and detects condition of the
motor.
Level : Rectangle wave output
Check method : Self diagnosis
k) Paper edge sensor (CN5-10)
Function : This is a mechanism sensor that is placed at rear of capstan roller. Same as
PATH 0 sensor, this is a mechanism sensor, so, this sensor can judge the pass
without discrimination of OHP sheet or ordinary paper. This is also
composed by photo interrupter and shutter.
Level : When passing through the paper, sensor indicates H.
Check method : Self diagnosis
l) Paper size sensor (CN5-12, 14)
Function : This sensor detects printing paper size in the paper feed tray. Two sensors
combination judge paper size and whether there is paper or not.
Level : When depressing the sensor, indication is H.
Check method : Self diagnosis
m) Load FG sensor (CN4-18)
Function : This sensor detects rotation of load motor.
Level : Rectangle wave output
Check method : Self diagnosis
n) Head home/position sensor (CN5-4, 5)
Function : This sensor detects position of thermal head.
Level : Refer to lower table.
Check method : Self diagnosis
Head position Home sensor
Home position
Position 1, 2, 3
OTHERS
o) Paper feed lever home/position sensor (CN5-6, 7)
Function : This sensor detects position of paper feed lever.
Level : Refer to lower table.
Check method : Self diagnosis
Lever position Home sensor
Home position
Position 1, 2
OTHERS
p) Ribbon cassette sensor (CN5-2)
Function : This sensor detects whether there is ink ribbon cassette or not. This is also
mechanism sensor that is composed by photo interrupter and shutter.
Level : When depressing the sensor, indication is H.
Check method : Self diagnosis
4-8
Position sensor
0 1
1 0
1 1
Position sensor
0 1
1 0
1 1
UP-D70/D70A (UC,CE)