Question about GE 27GT722 27" TV

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27GT722 Blows Fuse

Found FET in power supply shorted. Cannot make out part number on it. What is it. Can see DO6044 and Morocco on it and P9N, rest is unreadable. It has evidence of burning. What is replacement?

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The Transistor is Q14101. Sorry that I neglected to put that down. It is a FET I think, in the switching power supply section. Thank you, Dan. I am unable to find a diagram for this TV.

Posted on Sep 18, 2008

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There should be a part designation written on the board under that part. FOr example Qxxx or Dxxx. Can you post that here please? I can cross reference that designation using the model number to get you the part number, cost and description.

Dan

Posted on Sep 18, 2008

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The picture does not come on when I turn it on.


Hello

Your TV is now in dead condition I should say. You should strart from its power supply regulation section itsef to rectify the fault. Look into the fuse, a glass fuse is there, in power supply board. If It has found blown, make sure that there is something short in either power supply regulator side, of on the other part of the printed circuit board.
You just place a fuse of same rating as used, if the fuse is blown. If the fule you installed newly also blows off, check first the retifier stalk for any leak. The stalk contains four diodes, even any one of them gets shorte, fule will blow up. If there is no leak in the retifier stalk, measure the voltage resistance across the main filter capacitor, a bulky one capacitor fitted in the power regulator section. If you see a full deflection on meter, it means that there is some dead short inside the power regualtor system.
Usually Sony uses STR regulated type power supplies, and some uses MOSFET [Metal Oxide Semiconductor Field Effect Transistors], as switching elements. Bothe of these types can be shorted, due to a high voltage spikes, or a sudden supply failure and restart.
Check out short test on these components, out of board, that is, desolder it out from the circuit board. You just resolder one by one and measure the resistance ad described above. Thus you can find out the exact component, that have a short. If any of these components shorted, check the entire power regulator section for any more component failure, like zener diode short, resistors opened, and so on. You should have a concept of soldering and a little knoledge in electronics. There will be a MOV [Metal Oxide Varistor] fitted across the power supply input, which look like a disc capacitor. it will get shorted when a certain voltage spike occures abvve its rated voltage, and apply a dead short at the supply stage. If any of them used, desolder it out and check for any leak, and is found leaky, replace it. It is used as a saftey measure, and without it the set will work fine.
Just check these and if you find any difficulty, contact me through Fixya. Ok.

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1 Answer

Need Operators Manual for GE 27GT722


Found a manual online and that described the situation. Thanks.

Feb 08, 2010 | GE 27GT722 27" TV

1 Answer

Power board in magnavox 37MF231D blows fuse right away. Caps are good on board and fuse still goes when disconnected from TV.


Then you have a shorted regulator circuit. the best bet is to replace the power supply board itself. The part number is 313815864961. Please take a few moments to rate my answer, Thank you.

Nov 17, 2009 | Philips Magnavox 27MS343S 27" TV

2 Answers

Dead Set after power surge


Check the power supply transformer primary driver transistor and the associated components (some diodes and capacitors, resistors, an optocoupler maybe) and the rectifier diodes (or a bridge) and capacitors at the transformer secondary, what you are looking for is a short circuit, however, the short may as well be in another section of the circuit board (a shorted component may sometimes have signs of damage caused by heat, but this is not a rule).

Hope you can find out what it is...

regards

Triarcuate

Oct 01, 2009 | Televison & Video

1 Answer

Model TDC2075A Sansui Had lightning storm, lost power no close lightning strike. TV will not power up, don't know if it has internal protection or is power supply went out


you mite try replacing the ac fuse 1 time-if it blows again there is a short in the power supply-i would then check rectifiers in the primary of the power supply-then check the fet-if any of them are shorted replace them

Sep 04, 2009 | Sansui CDVD1900 19" TV/DVD Combo

1 Answer

Hi my philips television model number 34PT 5693 just sudden can't turn it on and the 'on' button was no light at all. I try to change the fuse inside the television and just blow off the fuse.


Check the mains rectifier ( 4 diode's or 1 block ) for short circuit ,also check the NTC/PTC resistor ,the power FET and power IC,if the last 2 parts are broken then measure al high omhic resistors between 300V and IC.

Jul 27, 2009 | Televison & Video

3 Answers

TV Blows internal fuse


You will have to find the source of a major short in your power supply.Since it's a 5A i assume i imagine that's where the short is.

Oct 23, 2007 | Samsung SlimFit TX-S2783 TV

1 Answer

Tv dead


no problem

replace by same number.

but remember before you replace check the following.

  1. check for normal output from power supply.
  2. check components connected to flyback transformer.like capacitors & diodes.
  3. check for print short.
  4. while replacing h/output be careful to check heat sink compound & mica sheet normal.
  5. put on the set
  6. if still it blows then flyback transformer is faulty.
  7. hope this will help.
  8. good luck.

Oct 11, 2007 | RCA HD56W58 56" TV

1 Answer

Shorts


Could it be in the HV circuit? first you isolate h/output section from power supply. make power supply output ok. check h/output section for short circuit 1 print short near eht 2 diodes or cap.near eht 3 yoke H winding just by removing connector 4 EHT transformer regards

Sep 12, 2007 | GE 25GT270 TV

1 Answer

Its actually a 13GP244


you need to check the power supply area. usually when a fuse blows, that means the bridge rectifier is blown or the ic in the power supply area is blow too or both are blown.check there..good luck

Apr 04, 2007 | GE 13GP243 TV

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