Brother LX-300 Service Manual page 118

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Dial Switch Circuit
This circuit detects the automatic cutting mode selected on the Cutting mode
selector switch.
This circuit comprises two push switches (RSW1, RSW2) mounted on each side of
the dial switch. The signals detected by these two push switches are input to the
Main PCB via the Switch PCB. The Dial switch circuit adopts one of four statuses
corresponding to each of the following permutations: RSW1 OFF and RSW2 OFF,
RSW1 ON and RSW2 OFF, RSW1 OFF and RSW2 ON, or RSW1 ON and RSW2
ON.
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Cover Switch Circuit
This circuit detects whether the cover is open or closed.
The cover switch is located in the center of the body cover.
The signal detected by the cover switch (leaf switch) is input to the Main PCB via
the Switch PCB.
The cover switch turns OFF when the cover is open and the CPU input signal
(COVER) P16 becomes High status.
Fig. 5.4-2 Dial Switch Circuit
Fig. 5.4-3 Cover Switch Circuit
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