Sanyo AVM2502... snow

[mrat]

I picked up this Sanyo AVM2502 which is around 21" out of a pile of
junk, I figured it was junk and that's why it was there, anyway. When
I got it home and plugged it in I surprised to find out that it
worked! the only problem is that every channel is snow...

I've read around and it sounds like the problem is with a part called
R508. I have no clue what this thing looks like or where it is. I also
have never worked on a TV before and am hoping that a jiggle,
resolder, or replacement would be all that is necessary.

I've searched all over the net for a schematic, or other tips, or
mabye even a picture but to no avail.

I've read that working back there can be extremely dangerous because
of the capacitors discharging etc.. and I would like to know if
leaving the TV unplugged for three days is enough to create a safer
environment.

I read that the R508 is located around the center to the left, from
what I can tell, it is the first place that the input cable runs to
and it stands up on end above most of the other parts. could this be
it?

thank you for any help!

 

[David]

STOP NOW before you hurt yourself.
Honestly, if you have no clue what a resistor designation is or what one
looks like, you should NOT even attempt taking the back off the tv set.
David

 

[Jerry G.]

I would strongly recommend you not work on the set. This is not a safe
undertaking. You are also trying to service a set based on "hear-say". The
tuner, IF, or ACG amp sections obviously have a defect somewhere. The set
was tossed because a repair like this can be fairly expensive in relation to
the value of the set.

The tuner and IF module are normally replaced as a replacement module,
rather than serviced, unless the fault is very simple. A new tuner module
alone can cost a fair amount to replace.

If you see the station, but it is snowy, this is usually low RF gain. The RF
amp stage may have failed, and or the RF AGC circuit has faulty components.
The service centres are able to properly diagnose these faults, and
determine the proper parts to change.

--

Greetings,

Jerry Greenberg GLG Technologies GLG
=========================================
WebPage http://www.zoom-one.com
Electronics http://www.zoom-one.com/electron.htm
=========================================


I picked up this Sanyo AVM2502 which is around 21" out of a pile of
junk, I figured it was junk and that's why it was there, anyway. When
I got it home and plugged it in I surprised to find out that it
worked! the only problem is that every channel is snow...

I've read around and it sounds like the problem is with a part called
R508. I have no clue what this thing looks like or where it is. I also
have never worked on a TV before and am hoping that a jiggle,
resolder, or replacement would be all that is necessary.

I've searched all over the net for a schematic, or other tips, or
mabye even a picture but to no avail.

I've read that working back there can be extremely dangerous because
of the capacitors discharging etc.. and I would like to know if
leaving the TV unplugged for three days is enough to create a safer
environment.

I read that the R508 is located around the center to the left, from
what I can tell, it is the first place that the input cable runs to
and it stands up on end above most of the other parts. could this be
it?

thank you for any help!

 

[mrat]

Consider it junked..

matt

 

[Chaos Master]

mrat bleeding:

Consider it junked..

What if you connect a VCR to it and use the VCR as the channel tuner?

[]s

 

[audiogeeb]

I tried hooking up a VCR to my SANYO AVM2502
and it is still just snow on all channels. Using the VCR tuner is a
no-workie.

 

[Chuck]

I tried hooking up a VCR to my SANYO AVM2502
and it is still just snow on all channels. Using the VCR tuner is a
no-workie.

I believe this set has the 39k or 33k1/2 watt resistor that opens up
on the main board. If I remember correctly, the number is R108. It
is usually located a little to the right of the flyback. Any
competent servicer should be familiar with this problem. Chuck