Problem with AKAI AC510 stereo

[Jean-Marc Delaplace]

Hi,
my set has a curious behavior: when the antenna signal lowers, the sound
is chopped at the pace of the music, i.e. when the music is smooth,
the sound is ok, but when the music has attacks, the sound cuts a
fraction of a second a each attack. I suspect some electrolytic
capacitor to be dry, but which one? Does anyone have the schematic of
this set?
Thanks in advance.
Jean-Marc

 

[Arfa Daily]

Hi,
my set has a curious behavior: when the antenna signal lowers, the sound
is chopped at the pace of the music, i.e. when the music is smooth, the
sound is ok, but when the music has attacks, the sound cuts a fraction of
a second a each attack. I suspect some electrolytic capacitor to be dry,
but which one? Does anyone have the schematic of this set?
Thanks in advance.
Jean-Marc

Have you tried forcing the tuner to 'mono' mode to see if the problem still
occurs ? It might be just that you are seeing 'normal' behaviour from the
stereo decoder circuitry, when the signal is marginal. If the tuner section
is of the older more traditional design, then if it is happening in stereo
mode only, you might want to try adjusting either of pilot tone PLL pot or
the discriminator coil.

Arfa

 

[Mark D. Zacharias]

Hi,
my set has a curious behavior: when the antenna signal lowers, the sound
is chopped at the pace of the music, i.e. when the music is smooth, the
sound is ok, but when the music has attacks, the sound cuts a fraction of
a second a each attack. I suspect some electrolytic capacitor to be dry,
but which one? Does anyone have the schematic of this set?
Thanks in advance.
Jean-Marc

I have seen older tuners do this sort of thing. Alignments generally fix
them. It may be switching stereo-mono or the mute circuit may be triggering
on peaks. My Onkyo T-4055 did that. I had adjusted the muting threshold
where I liked it instead of the specification. Had to re-do it for the
muting problem. Interestingly, it worked fine in the shop using a generator
and a sine wave input. I had to externally modulate the generator with drum
samples to re-create the problem in my shop.

Mark Z.

 

[Jean-Marc Delaplace]

Thanks to everybody for these opinions.
JMD


Dave Platt a écrit :