Question about Sanyo DS36930 36" TV

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I have a Sanyo DS36930. Upon initial startup, the picture is either wavy or the screen size is reduced to half or less. After a period of "on" time, the problem can be fixed by turning the unit off then on again. Sometimes when you stomp on the floor in a particular area the tv will fix itself. Of course, this leads me to believe that there is something loose in the unit. What could it be?

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  • debbolen Aug 23, 2010

    Thanks for the solution! If I do fix the unit, I'll add a post. Since I'm interested in a new LCD unit, I might use this as an excuse to buy!



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This is indicative of what is known as a "dry joint"
Intermittent problems such as this can on occasion be very difficult to trace

If you are OK working on high voltage equipment and have both the equipment and expertise it is possible to do some of these repairs yourself.

I tend to use a simple approach of disconnecting the equipment and simply checking for loose connections by unplugging boards (one connection at a time) until I have re-seated all the simple connections on the boards.

Then i would power up and check to see if the fault was fixed.

If it wasn't then I would remove the boards associated with a particular fault and check the solder side for dry joints and re-solder as needed (this requires patience and very good eyesight)

If that fails on a dry joint repair I would tend to try another board just to make sure its not a component level repair that is needed

Failure with the suspect board would lead me to maybe (depending on the time invested) move to an associated board.

If there is a lot of SMC on a board I would tend to recommend a new unit to the customer as I don't do Surface Mount Component repairs apart from some of the more common ones.


Posted on Aug 22, 2010

  • Project NOMAD
    Project NOMAD Aug 23, 2010

    LOL its the best excuse I can think of too

    "Yup honey (holding parts of TV in hand) its pooched fer sure"

    but make sure to add dirt effect to face gotta look like you tried



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Pictures goes to distorded wavy lines.

This could be attributed to tuning reception of your tv. If your using antenna only, it is most probable. If cable, check your line.

If this is a crt type, moving that tv with that size could somehow bend its circuit board. Loose connection is a probability. Could be some minor component is detached from solder. This can be attributed to tuner and vertical IC.

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Hi thanks for this but no to no avail. There is nothing wrong with the display itself - everything works but the problem is that the VIRTUAL size of the screen is 1500 x 950 instead of 1440 x 900 if you get my meaning. I wish i could find a way to shrink back the virtual screen size to 1440 x 900 so that it fits the exact physical screen. ie. if i was to play a DVD on full screen i would only see 95% of the picture because the virtual screen is larger than the display. And the virtual screen would move right if I shifted my mouse to the right edge. Still puzzled.

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