FM stations tune and "lock" but stereo light never comes on and no output.

No visible damage or obviously bad components.

Is there a common failure I should look for in this model?

Thank you.

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"John Keiser" ha scritto nel messaggio
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FM stations tune and "lock" but stereo light never comes on and no output.

No visible damage or obviously bad components.

Is there a common failure I should look for in this model?

Have you checked for cold solder joints ?

I.

John,

I'd start by putting a scope probe on the input of the LA3401 multiplex
IC and see if the signal is getting that far. I'm assuming that you've
checked the outputs of the voltage regulators IC301 (-12V), IC302 (+12V)
IC303 (another +12V) and Q301 (+5.6V)?

I've occasionally seen bad trim caps in the front end on some Carver
tuners, though I can't remember which models.

Regards,
Tim Schwartz
Bristol Electronics


John Keiser wrote:

FM stations tune and "lock" but stereo light never comes on and no output.

No visible damage or obviously bad components.

Is there a common failure I should look for in this model?

Thank you.

--
Remove -NOSPAM- to contact me.