Question about Philips 21PT4475 TV

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Blank raster with flyback lines on a philips TV. Sound ok

Blank raster with flyback lines on a Philips 21PT135A TV. Chassis type Anubis A AC. The sound is OK.

Gearoid

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6ya6ya
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Posted on Jan 02, 2017

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techman
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SOURCE: Tv showing blue screen with flyback lines sound ok

Flyback lines? Is the picture all white with no brightness control with faint horizontal faint lines? If this is what you are saying, the screen voltage could be bad, and if thats the case, the picture tube or the flyback itself could be bad. You could also have a bad connection on the crt socket

Posted on Dec 27, 2006

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  • 45 Answers

SOURCE: POWERS DOWN AFTER 4 SEC

crt beam current too high causing shutdown as you know. Check cathode voltage of each cathode, normal levels depend on picture is around 130-150V. Missing 200V to crt board. Screen voltage problem normal 300-500V. Flyback or bad crt. ABL circuit problem. Jungle IC.

Posted on Nov 04, 2007

MikeNJ1964
  • 398 Answers

SOURCE: mode-service of tv philips type:32pw9576/19e

Actually, the code is 0,6,2,5,9,6,MENU on the remote.

Posted on Dec 08, 2007

  • 1 Answer

SOURCE: Philips model HD2528-C122 value for capacitor C506?

I could still make out 68 over 2kv on the burnt capacitor. Replaced with a 680 pf 2kv that I bought at a local TV repair shop. works great.

Posted on May 29, 2008

ramendra34
  • 1 Answer

SOURCE: On switching Philips Tv type:21PT 240B/94R no sound,picture

I have Philips CTV 21 PT 240B/94R. and this time a problem are when set on chenel are not stop to change only forward and bottom right side Display Scan+

Posted on Nov 03, 2009

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1 Answer

Flyback # for philips tv model 21PT3952/71R


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A service manual for your model/chassis series is available (free PDF - 100% clean).

Elektrotanya for electronics experts


It sounds like a blank raster with retrace lines (no picture) which would be some kind of video fault. You could check C-board (Video OUT (IC9001-IC9003)) and progress from there. Also, being a CRT set, there may be a few bad solder joints everywhere - especially around the flyback transformer, and, with set unplugged, look for ruptured or bulging electrolytic capacitors in the video, vertical and HV areas of the chassis. Also check the horizontal output transistor(s) and associated tuning capacitor(s) to make sure they are OK (if they are, you can rule them out as suspects). It's a start.

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POWERS DOWN AFTER 4 SEC


crt beam current too high causing shutdown as you know. Check cathode voltage of each cathode, normal levels depend on picture is around 130-150V. Missing 200V to crt board. Screen voltage problem normal 300-500V. Flyback or bad crt. ABL circuit problem. Jungle IC.

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Philips 43PP8545


You have no high voltage, like many in this forum, this model of Philips has some of the same problems. Look around here you may find the answer to your set. If not check Vertical IC, TDA8177, audio ic on signal board up front on left. check Power supply first for blown fuse, 1000, 2004, 1300, 1900 etc. No sound or pic means something is open. Does set has L E D lights on front of set?

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This denotes a problem called blooming the horizontal lines you see are called retrace lines this is caused by the increase in anode voltage which could be caused by an increase in HV section current which trips the overcurrent protection dircuit and turns the TV off.If you do not have electronics experience I would suggest taking the set to a TV repair shop.

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1 Answer

Tv showing blue screen with flyback lines sound ok


Flyback lines? Is the picture all white with no brightness control with faint horizontal faint lines? If this is what you are saying, the screen voltage could be bad, and if thats the case, the picture tube or the flyback itself could be bad. You could also have a bad connection on the crt socket

Dec 27, 2006 | Philips Magnavox 20MT133S 20" TV

1 Answer

Faulty TV


check the ABL at the flyback. sould be at least 185+ volts on the G2 at the crt socket

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