Sony UP-D70XR, Service Manual

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4-8
UP-D70XR
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 Position sensor
Home position 0 1
Position 1, 2, 3 1 0
OTHERS 1 1
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 Position sensor
Home position 0 1
Position 1, 2 1 0
OTHERS 1 1
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