Brother LX-300 Service Manual page 121

S
Film Feed Detector Circuit
This circuit detects the film feed status to prevent jams if a problem occurs.
The film feed detector switch TPS is mounted before the paper eject roller and if
there's no problem with the film during document feed or compression, the film
presses against the film feed detector switch TPS and sets the ON (input Low).
S
Input Voltage Detector Circuit
This circuit detects the AC adaptor output voltage to prevent danger due to an AC
adaptor that is faulty or incorrectly inserted.
The AC adapter output voltage is split by R25 and R50 and input to the CPU A/D
converter port P60.
The CPU detects the AC adapter output voltage from the voltage input to the CPU
A/D converter port P60.
Fig. 5.4-8 Film Feed Detector Circuit
Fig. 5.4-9 Input Voltage Detector Circuit
5-15