Brother LX-1200, Service Manual

Page: 116 / 175

5-10
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.
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Switch scan circuit Two-connection switch, Continuous key, Extra
border key, Start key, and Stop key
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Dial switch circuit RSW1
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RSW2 switches
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Cover switch circuit Cover switch
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Paper width detector circuit YCA-F sensor
•
Paper length detector circuit PST switch
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Cartridge type detector circuit CSIZE3
•
CSIZE4 switch
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Film type detector circuit ENC sensor
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Film feed detector circuit TPS switch
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Input voltage detector circuit ACV signals