Panasonic VL-SV75 Series Service Manual page 23

C
No image can be seen by the call from the Door Station.
(The ringer tone and the talking are OK.)
Is the FM signal at
pin3 of IC200 on the Main Board of
the Door Station OK?
(Refer to Fig.1)
YES
Measuring conditions (FM signal):
The Main Monitor Station and
the Door Station should be connected.
Supply power to the Main Monitor Station,
and press "TALK" Button of the Main Monitor Station.
Then make sure that an FM signal
has arrived at pin 3 of IC200.
The FM signal from pin3 of IC200 on the Main Board of the Door Station.
Is there Image signal
at TD200 (Main Board) OK?
(Refer to Fig.2)
YES
Replace the Main board.
Measuring conditions (Image signal):
The Main Monitor Station and the Door Station should be connected.
Supply AC Power to the Main Monitor Station, and press "TALK" Button of the Main Monitor Station.
Then make sure that a signal has arrived at IC200.
* The signal level and waveform can be changed significantly depending on the capturing subject.
It is OK when the same signal shape in the circle is confirmed (No concern with the voltage level.).
The image signal (TD200) from the Camera (CMOS) of the Door Station.
Reference:
• Refer to Image Signal in
NO
Check Signal Flow of the Image Signal
(Door Station) Main Board
About 1.7 V
Fig.1 FM signal
NO
Are there any
missing/faulty parts
around IC200?
(main Board)
Replace the fault parts.
Fig.2 Image signal
[9.3 Signal Route].
Are there any faulty
parts found?
YES
Replace the fault parts.
NO
YES
Replace Camera (CMOS) Ass'y.
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NO
Replace the Main board.