Various Kinds Sensor Detection Circuit - Sony UP-D2500 Service Manual

4-2-6. Various kinds sensor detection circuit
Platen position sensor Paper sensor
Platen cover sensor Paper supply timing sensor
Head position sensor Eject paper timing sensor
Ribbon cassette sensor Tray position sensor
Paper jamming sensor Paper ejector sensor
Ribbon code sensor Ribbon FG sensor
Bar code sensor Paper supply FG sensor
Paper size sensor
The following sensors are performed A/D conversion.
Ribbon code sensor
Paper jamming sensor
Bar code sensor
These threshold levels are successively changed. The threshold level is fetched from E7PROM
when the power is turned ON. After print is ended and the bar code is read, suitable setting value is
calculated and is written in the E7PROM.
( The level can be ensured in the mechanical tool mode.)
1) Platen position sensor
Route : SE-419 to SE-417 to PRT-11
TP : PRT-11 board TP102
Function : Home position distinction of platen
Level : H Home position
L_ Except home position
2) Platen cover sensor
Route : SE-419 to SE-417 to PRT-11
TP : PRT-11 board TP105
Function : Distinction whether platen cover is opened or not
Level : H_ Cover is opened.
L Cover is closed.
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