Brother LX-200, Service Manual

Page: 121 / 177

5-13
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Cartridge Type Detector Circuit
This circuit detects the type of film cartridge.
The cartridge type detector switch CSIZE is mounted at the film cartridge inlet.
When an A4 film cartridge is inserted, the film cartridge presses the cartridge type
detector switch and sets the input Low (ON). When no cartridge or an A6 film
cartridge is inserted, the input remains High (OFF).
Fig. 5.4-6 Cartridge Type Detector Circuit
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Film Type Detector Circuit
This circuit detects the type of film.
This circuit comprises a reflective photosensor ENC that is mounted on the film
detector PCB, located on the side of the film cartridge holder. The reflective
photosensor reads the black and silver target pattern along the edge of the film to
determine the film type.
Fig. 5.4-7 Film Type Detector Circuit