No Video On Remote Display; Transducers Troubles - Philips Avalon FM20 Service Manual

No Video on Remote Display

Symptoms
No video on a connected
remote display.
Transducers
Note that immediately after plugging in a normally functioning transducer, the Finder LED briefly
lights twice.
Symptoms
The transducer Finder
LED does not light up
after plugging in the
transducer, and the
transducer appears not to
work.
INOP
Bus Master Malfunc
is displayed.
Possible Causes of Failure
The cable is not properly connected.
The remote display has no power.
Possible Cause
Defective transducer cable
Defective connector block
Transducer or connector block is defective
Bus Master Board is defective
No power to Bus Master Board
8 Troubleshooting
Failure Isolation and Remedy
Check that the video cable is securely
connected at both ends.
Ensure that the remote display is properly
connected to AC mains.
Failure Isolation and Remedy
Visually inspect the transducer cable and the
cable connector for damage. If there are
obvious signs of damage, replace the cable.
Visually inspect the connector block and the
sensor sockets for damage. If there are
obvious signs of damage, replace the
connector block.
Try plugging the transducer into a different
sensor socket.
• If the Finder LED works, then the
original socket is defective. Replace the
connector block.
• If the Finder LED still does not light in
any of the other sockets, try using a
known good transducer. If the Finder
LED lights, the original transducer is
defective: replace it.
Try using a known good transducer. If the
Finder LED does not light in any of the
sockets using a known good transducer,
then the Bus Master Board is defective.
Replace the Bus Master Board.
If both the SpO board and the Bus Master
2
Board are not working, exchange the power
supply.
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