Question about Mitsubishi Televison & Video

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No picture constatant pounding sound when you turn up volumne, power button comes on screen is black. thumping sound comes thru speakers.no other activity going on. mitsubishi 52'' projection screen not hd. about 8 years old

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  • jmphins Jul 20, 2009

    the model number is vs-50501a. when i listen from behind the set i hear a constant snapping sound but the sound comming thru the speakers is a loud pounding. thanks for any help you can give me or a round about estimate to fix the set . thanks again.

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  • Mitsubishi Master
  • 5,807 Answers

Hi,

there might be circuit failure inside your TV systems,first we check on the power supply output voltages, it may not have enough to power up the horizontal deflection circuits.

here is a guide for you.

if you have a multimeter measure the voltage on the capacitor after the diode of chopper secondary windings.that would be the B+.

maybe the supply rail B+ is only about 45V or still lower
solution : replace the horizontal deflection flyback transformer maybe partially shorted

maybe no voltage at all
solution : check horizontal output transistor might be defective, replace if found shorted

maybe there is a good supply say at least 110V , but no oscillator drive on the horizontal output transistor, or blocked oscillator signal drive

hope this helps, thanks for using Fixya!

Posted on Jul 21, 2009

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  • Master
  • 10,594 Answers

Hi,
Please intimate exact model of your Mitsubishi TV that is written on sticker pasted at back. Model number will help me to look into its schematics for possible reason of problem and its possible solution.
Thanks.

Posted on Jul 19, 2009

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Posted on Jan 02, 2017

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