Detector Circuits - Brother LX-300 Service Manual

5.4 Detector Circuits

These circuits detect the status of the switches and keys that operate the machine
(Two-connection switch, Start key, Stop key, Dial switch, Continuous key, and Extra
border key) and the sensors that determine the film type, document length and width,
and cover open/closed status.
The circuits that detect each switch and sensor are listed below.
In addition, a separate switch to detect the motor initial status is also mounted.
•
Switch scan circuit
•
Dial switch circuit
•
Cover switch circuit
•
Paper width detector circuit
•
Paper length detector circuit
•
Cartridge type detector circuit
•
Film type detector circuit
•
Film feed detector circuit
•
Input voltage detector circuit
Two-connection switch, Continuous key, Extra
border key, Start key, and Stop key
RSW1•RSW2 switches
Cover switch
YCA-F sensor
PST switch
CSIZE3•CSIZE4 switch
ENC sensor
TPS switch
ACV signals
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