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Posted on Aug 14, 2007
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Blows fuse Has a dead short blows fuse everytime.

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  • 2 more comments 
  • dwitchel Aug 15, 2007

    If I disconect the Degauss wire it will play and not blow the fuse.

  • dwitchel Aug 16, 2007

    I can not find a thermistor on this set. Do you have a # for this part?

  • dwitchel Aug 21, 2007

    Replaced Thermistor,hard to locate.
    Thank You For Your Help

  • 01ed Jan 09, 2008

    replaced fuse with known good. Blows at power up

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3 Answers

Anonymous

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  • Posted on Aug 16, 2007
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If you disconnect the degaussing coil and the set plays fine, it means one of 2 things is wrong. The degaussing thermistor could be shorted internally. I have seen this happen a few times on those degaussing thermistors that are in the little black boxes with 3 legs. Those boxes actually have 2 thermistors in them, one to do the actual degaussing and another connected directly across the AC to act as a heater for the degaussing thermistor. One of those thermistors could have "flashed over", which would blow the fuse the instant the set it turned on. The only other thing would be the wrong size main fuse. Without a degaussing coil the set probably draws about one amp, but the surge at turn-on with a degaussing coil could be as high as 4 amps. If you have the correct fuse installed and it blows at turn-on, replace the degaussing thermistor.

  • Anonymous Aug 17, 2007

    I do not know the part number for the degaussing thermistor in that set, but it is easy to find. The degaussing coil is wrapped around the picture tube and has the 2-conductor plug that plugs into the jack on the main board, very close to where the AC power cord connects to the same board. The degaussing thermistor is usually right next to that jack. Sometimes it looks like a silver coin with wires attached to the sides, sometimes it is dipped in a colored coating, and sometimes it is inside a little box. Follow the traces for the degaussing coil's jack, one will be connected to the thermistor. The thermistor may be labeled something like "TH001" on the board, but I have also seen them labeled with an "R". Let me know if you still have trouble finding it.

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Anonymous

If not could be smoothing cap on the mains side, aswell as the bridge, fuse also

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  • Posted on Aug 15, 2007
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Power supply definately. Check for short in bridge retifier. Any Diodes short or regulator bad. start from power cord coming in and check all. Could be anything. Use a meter on continuity and just check across doides when you check and it keeps beeping reverse leads and see if it still beeps constant. That maybe your problem.

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