Question about Philips 20PT6446 20" TV

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I have a philips power vision tv but some transistors were burnt beyond recognition can someone help with a detailed power supply diagram for the tv.chasis no-3139 127 27001 some of the numbers writen on it are .20PT2001/59A. [8239 124 3064.4]

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6ya6ya
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Posted on Jan 02, 2017

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  • 1153 Answers

SOURCE: philips tp3281c chasis#32d700-7570

I believe this set has a horizontal output that has a damper diode inside. you can check inset or out, most popular is out set. take multimeter and put on ohms or continuity and touch each leg by holding one lead to end and if you are looking for a short then in continuity it will beep or zero or very ohms. And Ohms just the same way. looking for low ohms like 1.0 or 0.9 or anything close. Switching leggs back and forth. If all three legs are shorted then replace. but in this one 2 can be shorted and still be good, just depends on which ones

Posted on Aug 29, 2007

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daniel719
  • 240 Answers

SOURCE: transistor lost.

if you are replacing 7402
also replace diode 6404 this diode even thou it test goo will in long term overheat 7404 and caus it to go bad by leakage.
and if 7402 gose bad it is regulating the 15v stanby volts that is 7412 is also going to be bad so replace 7412 also
now
the part numbers are:
7402 = # 932211676682

7412 =# 932210514682


thanks,
daniel.

Posted on Jan 13, 2009

  • 901 Answers

SOURCE: i want to know the

You have to try in Google search.

If the transistor body is not damaged, you can read the type no. Replace it with identical No. Make sure the diodes and capacitors are not damaged. Check with multi- meter

Posted on Sep 29, 2010

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