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Philips tv 20pt2423/94r power supply output no

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Posted on Jan 02, 2017

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SOURCE: regarding 29gx1891/56r Philips Colour TV,LED keeps on blinking.

The problem was detected as a case of unregulated Power Supply Output. A sort of Crowbar is set in operation if the Power Out is above tolerable limits, which cuts off the supply to the Horizontal and etc. IC TDA 8362. The diagnosis was a faulty PWM IC 3842.

Posted on Feb 02, 2009

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Philips 42PFL3704D/F7. Why does it keep restarting?


Philips 42pfl3704d/f7 power reset when HDMI, USB, or cable ...

www.badcaps.net > ... > Troubleshooting TVs and Video Sources

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Philips 42pfl3704d/f7 power reset when HDMI, USB, or cable attached ... or Cable TV to unit the power resets, philips screen comes on and keeps on resetting. ... I tried a cable to the tv without the box and I do get picture.

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Amazon.com: Philips 42PFL3704D/F7 42-Inch 1080p LCD HDTV: Electronics. ... Will do all I can to prevent others from getting ripped off by Philips. ... came up every few weeks and would take an hour or so of reset before working properly.

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42" Philips 42PFL3704D/F7 LCD TV WON'T COME ON - A


Dec 29, 2015 | Televison & Video

1 Answer

Philips md#32PT9100D/37 will not turn on only


Hi

Your tv set may have a short circuit both in the power supply and horizontal output stage. The first approach I suggest is to check the rectifier fast diode in the line supply (90/100V) for short. This model is prone to burn this component and may be associated with some problem in the horizontal output or even in the RGB output.
I would like to point out that this task require a technician as should be supported with a schematic of this model.
If this is helpful, I shall be glad.
Sully

Sep 22, 2013 | Philips Televison & Video

1 Answer

Philips/Magnavox 27TS54 C101/chassis 27B800-7562. Originally would not turn on at all. Replaced C506 (totally scorched) as other posters recommended. Now turns on but only bright white horizontal...


check for power supply for normal dc voltage..try resoldering the vertical output ic or test the vertical output ic dc supply..if there is..try finding some loose connection to the deflection circuits

Jul 13, 2011 | Philips TS2768C 27" TV

1 Answer

HAVE A PHILIPS 15" WITHOUT


Good day!

Actually if your TV have problem like that it is not on the inverter.That problem could be on the power supply or the system board.

Follow this D.I.Y procedures to find the exact problem of your TV.
  1. Remove the back cover of your TV.
  2. After that,find the power supply board.
  3. If you already found the power supply,plug-in your TV and power it ON.Check the input voltage of it,using multimeter (AC range).If the power supply have no input voltage the problem could be the power cord.Replace it.
  4. If the power supply have the input voltage,try to test the output voltage if have 5vdc for the system and logic supply,12vdc for the sounds and 24vdc for the back-light inverter.Use your multimeter tester (DC range) to test that.
  5. If the power supply have a voltage outputs such as 5vdc,12vdc and 24vdc and the problem is still there.The problem could be the main board.Replace it with the same type and model # because the main board is no very difficult to fix and its very sensitive.
  6. If the power supply have no output voltage or the voltage is too low,just ignore the step # 5 because the problem is not on the main board,its on the power supply board.
Check the following to fix the power supply board:
  • Fuse: Check the fuse if it is busted or blown.
  • Power transistor (regulator): Check the regulator if it is shorted or leak.
  • Resistor: Check the resistors specially the one that have a low resistance that near the power regulator.
  • Capacitor: Also check the capacitors if it is leak or bulging top.
NOTE: If you found any defective parts or components that mention above replace it with the same value,type and ratings.

I hope this solution will be helpful.Thank you and good luck.

Apr 28, 2011 | Televison & Video

1 Answer

No power ticking sound when plug into outlet


Hello

Your Philips Tvs line output section has some trouble with it. All philips power supply circuits are so designed that, even a small short circuit in the ciruit board occurs, the power regulator will sense it, and the entire system will shut down, and that is happening now in your TV.

You just start with the horizontal output transistor, fitted very close to Line Output Transformer [LOT], for any short. You must desolder it out from the circuit for this check, and check it for collector to emitter leak. If this will happen, the main regulated power supply ie 120VDC, will gets shorted through this transistor, cause a dead short circuit. If it is shorted, you must find out the reason for that short.

If LOT said above has damaged, this transitor will also get shorted. In otherwords, if LOT is damaged, its driver transitor,will also will get leaky. You just replace this transitor with an identical one. Switch on the tv for a while, say 10 seconds or so, check its heat effect. If it heats up abnormally, surely LOT has damaged, and you should replace it also with an identical type and number. Ok

Nov 24, 2010 | Philips 32PT563S 32" TV

1 Answer

Regarding 29gx1891/56r Philips Colour TV,LED keeps on blinking.


The problem was detected as a case of unregulated Power Supply Output. A sort of Crowbar is set in operation if the Power Out is above tolerable limits, which cuts off the supply to the Horizontal and etc. IC TDA 8362. The diagnosis was a faulty PWM IC 3842.

Jan 27, 2009 | Televison & Video

1 Answer

Dead unit


your problem is that your output is less than normal

first you isolate h/output from power supply if it comes to normal(115V).

then problem in h/output stage

for that you check

h/output,cap & diode in flyback section & flyback transformer.

but power output is still 50v then problem in power supply for that check oscillator ckt & switching output.

good luck.

Oct 17, 2007 | Philips 27PT543S 27" TV

1 Answer

Tv set won't start up


as your reg. output is 40v & you have checked every possible things responsible for it. my suggetion is that first you isolate power supply from hor.section & see if power supply output is ok. if it is ok then check for short & leakage in h/output like 1 hor.output tr. 2 diode or cap in eht winding. 3 check for print near eht transformer. 4 disconnect yoke connector & check . 5 & finally eht or flyback transformer.

Sep 29, 2007 | Philips Magnavox 27MS343S 27" TV

1 Answer

Loud pop and picture is no longer available.....


blown resistor (42ohm) replaced this and it imediately blew it clearly shows that there is a short circuit in your tv. if you are a tech person please proceed as follows. 1 isolate power supply from hor.output section. 2 now check power supply section.i.e. switching tran., cap..diode etc. 3 if it becomes ok check power supply output. 4 if output is ok then check hor. output section.i.e. h.out tr.,cap& diode in eht winding. 5 check print near eht. 6 at finally eht. 7 see every thing is normal now. now reconnect power to hor.section. put on tv. good luck.

Sep 24, 2007 | Philips 7P6041W TV

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