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POWER SUPPLY CHECK ORIGINAL VALUE OF DIODE

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Bad power slup or bad con,v ic stk392-120

Posted on Nov 21, 2013

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Vizio e420-a0 has no picture


the problem isnt in the power supply unit, put back the original power supply instead, check the heat section of the board where you can see the flyback section, verify the high voltage input by using the voltmeter , if high voltage is missing check all the capacitors and diodes near the highvoltage section, if blown replace it with the same value.

Nov 29, 2016 | Vizio Televison & Video

1 Answer

Sony TV has a power supply problem both ics irf1b7n50a in the power supply section are all shorting which number could I use as an equivalent. is there a way I could use a power modular with two power id's


Hi Saidi
Have you checked all the other components used in the main power supply regulator section circuit, before replacing a new STR? You should do it. There should be a reason for the failure to STR. You should find it, and rectify it, before replacing an other STR. Check all the small components, resistors, zener diodes, small value ceramic capacitors etc: Make sure all of it are OK. Especially give a keen attention to zener diodes used; if any. It will be best to replace these diodes, even if you do not find any fault with it with multimeter test.For more information go to http://electronicshelponline.blogspot.com/
Power supply schematics to some popular brand TVs are given. Pull up older posts. Good Luck.

Nov 26, 2013 | Televison & Video

1 Answer

MCS 160 Boston Subwoofer ZD3 Zener Diode Value


ZD3 is a 18v zener. Also check the surface mount resistor on the back of the board that is attached to ZD3, I think it is R9. Should be 10 ohms. This resistor sometimes opens when the diode goes short.

Jul 13, 2013 | Audio Players & Recorders

1 Answer

Short internal power supply


please check for any blown fuses, if there is replace with the same value, do not replace it with a higher value. also check resistors near the rectifier diodes, check full wave diodes & ic regulators, if you find an error replace with the same value or specs.

May 30, 2013 | QSC Audio Players & Recorders

1 Answer

LG 32lh200 power supply failure common problem


You might try to follow the diode back to the source and read voltage to know the value of the diode and also look on the diode for generic number--short of that Google the model number with "parts" as it might be cheaper to replace the board than try to fix it by guessing values.

Aug 27, 2012 | LG 32LH200C-A1 LCDTV 32LH200C 32inch Wide...

3 Answers

Fuse keeps blowing in my philips 32pfl3505d/f7 tv


Good day!!!!


That problem is cause of shorted bridge diode or power mosfet..

just see the picture below to see the image of bridge diode and power mosfet..

bugoy31_16.jpg

If you don't have a tools or you have no electronic background you only have to is order the new power supply board..

I hope this solution will be helpful..Thanks for using fixya....

Sep 04, 2011 | Philips 32PFL3505D 32 in LCD TV

1 Answer

Polaroid 860-AZ0-GF371H Power Supply Unit. After replaceing all bad caps and and shorted fets Q102,103 I still need to know the value of smd zener ZK2 in Parallel with 3 low value smd resistors. I think...


HZK Series

Silicon Epitaxial Planar Zener Diodes for

Stabilized Power Supply

open the following link and it help you it has all the detail about the mentioned diode

Aug 26, 2011 | Polaroid FLM-3232 Television

2 Answers

The problem is power out put voltage diodes are completely burned I not getting the value of the diodes The voltages are 72v 50v 6.3v 13v -12v These are out put voltages .so please sending me...


hi;
  1. Diode: UF4007, 1000V 1Ampere ; for 72V
  2. Diode: GUR460L, 600V, 4Ampere : for 50V
  3. Diode: UF5404,400V, 3Ampere: for 6.3V
  4. Diode: UF1G, 400V, 1.2Ampere: for 13V
  5. Diode: TVR10G, 400V, 1Ampere: for -12V
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Nov 12, 2010 | SAMTRON 55V 15" CRT Monitor

1 Answer

Power supply not switching


replace the regulators,check for change value resistors at the power supply section or resistors near the regulator.check for shorted diode and leak capacitors..also check the horizontal output v transistor..

Jul 16, 2010 | Akai CF2791 27" TV

2 Answers

I have no power getting into my dvd recorder. would it be the power supply to the unit is burnt out.


If you not getting any indicator at all, then the power supply is dead, if you get some indicator light and that all it does, then the 5v standby voltage circuit is OK but not the main power section. Look for bad filter capacitors that will have bulging tops.

Nov 01, 2009 | LG DR275 Recorder

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