All posts by Jestine Yong

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  Mini Digital Oscilloscope

  One of my repair friends came to visit me today.  As usual both of us talked only about electronics repair.  He is in the industrial electronics repair and he did showed to me those electronics circuit board...

  • Posted June 24, 2013
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• No Power In Kinwin PSU ABT-800MA1S

  Please help me to identify a fault on Kinwin PSU ABT-800MA1S. The PSU is dead and silent with fuse good. Voltage testing: AC input is ok The filter capacitor is ok The Supply voltage of power IC...

  • Posted June 24, 2013
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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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