Issues with the stereo tuner TEAC T-X120
TFranco60 wrote:
Hi everybody,
I'm trying to fix a stereo tuner TEAC T-X120 I've received from a
friend of mine,
this tuner shows issues when in FM:
1. The automaic search of the FM radio stations seems not to work,
you can eventually
start it, the receivers seems to run thru the FM frequencies, but no
station found/tuned.
2. You can tune manually a radio station only in MONO, if you try to
switch to STEREO
the receiver stays silent, the STEREO leds stays down, nothing can be
heard then.
Obviously I've used a new FM dipole, no changes... Any clues/advices ?
Thank you all and hi from Italy.
Franco.
The discriminator adjustment is off. This is actually a very common problem
for digital tuners. There are two discriminator adjutments in a typical
tuner. One adjusts the station centering (I suppose you could call it a
"zero-cross" point), the other affects the distortion more. For this reason
this alignment should be done in a shop by a qualified tech. In rare cases
an out-of-spec 7.2 mHz crystal could cause the same symptom.
Mark Z.
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