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Charlie East
 
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Default Sony KV27TS29 (Audio)

Set has very weak audio, Picture is fine. Using off air signal. Ch 3 has a
little audio, seems to get louder when the station is playing music, Ch 12
has no audio. speakers are on. Disconnecting the ant input gives a loud
hissing(normal no signal sound) So I am assuming the audio output is working
ok.Looks like the audio det. is in the tuner. Scope the R & L out at the
tuner pins 22 & 23 .can see a little audio from ch 3, none from ch 12.
Voltages all appear to be pretty close..
Looked at the service menu, All the settings are pretty close to what the
SAMS indicate they should be.
I am thinking bad tuner, but not sure and dont have one to try.
Any help would be appreciated.
Charlie