All posts by Jestine Yong

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  A Door Motor Control Board Repair

  A strange thing happened today as I was working in the shop; an electrician came in and showed me a door motor control board. I checked it out and found some nasty burns marks on it. There...

  • Posted June 23, 2013
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  Is Electronics Repair A Dying Trade?

                  Sir, please tell me whether electronic repairing business is a dying trade, since i am interested to do lcd/led repairing as my full time business. ========================== Electronics repair cannot...

  • Posted June 23, 2013
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• About Sunwa Analogue Multimeter

  In your book “electronic component testing” you stated that you use an analog meter with a 9v and 2x 1.5v.  I looked up the specs on the meter you use, the Sunwa yx-360trn and it only uses...

  • Posted June 22, 2013
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• 5 Volt Line Not Stable in LCD Monitor

  I’m having trouble pinpointing the fault of a non powering LCD monitor, the +12V line checks good (stable 13V) But the +5V line gives me a non stable reading with a DMM, I’ve tried an analog meter...

  • Posted June 22, 2013
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• Capacitor Type In LCD Monitor Inverter

  I replaced the 2 NPNC5706 transistors because of shorted COLLECTOR and EMITTER leads.   But everywhere i look for these white rectangle caps i find no data available for this item.   I do not know the values of...

  • Posted June 22, 2013
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• CRT TV Color Problem

  Hi Mr Yong i have a 21″ crt tv. The crt tv color problem is it shows reddish picture. A yellow colour shows orange. Whats the problem? Answers: Check the CRT board if one of the color...

  • Posted June 22, 2013
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• What is the AC voltage from the 14″ LCD Monitor Inverter?

  Sir how much voltage that comes out from the good inverter of 14 ‘ pc lcd monitor, This can be test by a simple analog tester? Answer: About 500 to 800 vac depending on the model. Some model...

  • Posted June 22, 2013
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  Microwave Oven with, no heat problem, repaired. Model: Brother BR-713

  This microwave oven was brought to my shop by a restaurant owner who lives nearby and told me that it does not heat up the food. Usually when a microwave oven does not heat up, it is...

  • Posted June 22, 2013
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