Philips Avalon FM20, Service Manual

Page: 121 / 260

8 Troubleshooting
121
No Video on Remote Display
Transducers
Note that immediately after plugging in a normally functioning transducer, the Finder LED briefly
lights twice.
Symptoms Possible Causes of Failure Failure Isolation and Remedy
No video on a connected
remote display. The cable is not properly connected. Check that the video cable is securely
connected at both ends.
The remote display has no power.
Ensure that the remote display is properly
connected to AC mains.
Symptoms Possible Cause Failure Isolation and Remedy
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.
Defective transducer cable Visually inspect the transducer cable and the
cable connector for damage. If there are
obvious signs of damage, replace the cable.
Defective connector block Visually inspect the connector block and the
sensor sockets for damage. If there are
obvious signs of damage, replace the
connector block.
Transducer or connector block is defective 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.
Bus Master Board is defective 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.
No power to Bus Master Board If both the SpO
2
board and the Bus Master
Board are not working, exchange the power
supply.