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Posted on Sep 12, 2007
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Shorts My 25GT270 tv just quit. Blown Fuse. replaced it, but blows as soon as you plug it in wall. Checked diodes(all good) and it shows no shorts in power connections. It also opened up the 2.7ohm ceramic resistor. I replaced it also but still blows fuse. Could it be in the HV circuit? Any help appreciated. Thanks

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  • ke4vbg Sep 15, 2007

    I removed the H/out transistor and with a LCD meter on 200 it read less than 1 ohm between any 2 leads, except from B to C with + lead on C it read 1.2 ohms

  • ke4vbg Sep 18, 2007

    The horiz. output was shorted so I replaced it. now it does not blow the fuse. it tries to come on but I hear a ticking sound at the Flyback transformer. sounds like a watch ticking. the front of the screen crackles but won't light up.

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Anonymous

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  • Posted on Sep 12, 2007
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Could it be in the HV circuit? first you isolate h/output section from power supply. make power supply output ok. check h/output section for short circuit 1 print short near eht 2 diodes or cap.near eht 3 yoke H winding just by removing connector 4 EHT transformer regards

  • Anonymous Sep 18, 2007

    there is a sparking in crt.
    1 you will have to check power supply for more outpu, due to that high voltege in filament &g2 may have created problem.
    2 check crt.
    caution
    put of tv set & discharge crt before you check crt base.

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Your fuse blown again because you have a short on the circuit. You may visit my link http://www.fixya.com/support/r8053361-fuse_keeps_blowing for more info.
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