Panasonic VL-SV74BX Service Manual page 24

D
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?
YES
END
Reference:
• Refer to AM Signal in
When lighing operation is
NO
carried out with the Monitor Station,
does lighting turn on?
any missing /faulty parts
Replace the fault parts.
NO
Check AM signal
[9.3 Signal Route].
NO
Are there
any missing /faulty parts
YES
around LED200
and LED201?
Replace the fault parts.
Are there
NO
around IC204?
Replace the Main board.
YES
NO
Replace the fault parts.
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NO
Replace the Main board.
YES