NO
YES
YES
END
NO
NO
NO
NO
D
YES
YES
If the front side of
door station is made dark,
does lighting turn on
automatically?
YES
When lighting operation is
conducted with the Monitor
Station, does lighting
turn off?
When lighing operation is
carried out with the Monitor Station,
does lighting turn on?
Are there
any missing /faulty parts
around LED200
and LED201?
Are there
any missing /faulty parts
around IC204?
Replace the Main board.
Replace the Main board.
NO
Replace the fault parts.
Replace the fault parts.
Replace the fault parts.
Check AM signal
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