Tale of 2 Magnavoxes

[jakdedert]

....both with tuner probs.

The first, Model # RR13Y06401 -- Chassis # 13YY01-00AA (man. date: 1992)
has an absolutely beautiful picture...works fine in fact EXCEPT on odd
occasions, the audio jumps up one or two channels for half a second or so.
Then it's fine until it does it again. When that happens, the video appears
to be mistuned (noisy, unrecognizable, out of sync picture).... Is there an
external (to the tuner) stepped voltage source which could be at fault here,
or would it be the tuner itself? Any chances of fixing?

The other, Model RJ5540AK07 -- Chassis # 2761-01 (really old; assembled in
Cookeville, TN--just a few miles up the road--in 1988)
has an 'ok' picture, but the tuner just 'skips' cable channels 26 - 54.
When one of the offending channels is selected, a mistuned version of
channel 24 appears ('buzzy' audio, unclear picture). All the consumer menu
settings are correctly selected.

jak

 

[jakdedert]

...both with tuner probs.

The first, Model # RR13Y06401 -- Chassis # 13YY01-00AA (man. date:
1992) has an absolutely beautiful picture...works fine in fact EXCEPT
on odd occasions, the audio jumps up one or two channels for half a
second or so. Then it's fine until it does it again. When that
happens, the video appears to be mistuned (noisy, unrecognizable, out
of sync picture).... Is there an external (to the tuner) stepped
voltage source which could be at fault here, or would it be the tuner
itself? Any chances of fixing?

The other, Model RJ5540AK07 -- Chassis # 2761-01 (really old;
assembled in Cookeville, TN--just a few miles up the road--in 1988)
has an 'ok' picture, but the tuner just 'skips' cable channels 26 -
54. When one of the offending channels is selected, a mistuned
version of channel 24 appears ('buzzy' audio, unclear picture). All
the consumer menu settings are correctly selected.

jak

Wow! I just searched google groups and found a lenthy thread in this forum
from 1999 concerning a defective PLL chip in this exact 27" set, with exact
symptoms. I'll do some more searching for the little set....

jak

 

[jakdedert]

Wow! I just searched google groups and found a lenthy thread in this
forum from 1999 concerning a defective PLL chip in this exact 27"
set, with exact symptoms. I'll do some more searching for the little
set....

Nope...no help on the little Maggie above (# 13YY01-00AA). See above for
symptoms...any ideas as to where to start?

jak