Question about Gateway FPD2275W LCD Monitor

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Flyback Tester Hellow sir. Can you help me find a diagram for "FLYBACK TESTER" i just want to construct and practice this type of test instruments..... pls sir help me with this one...Thanks a lot...

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  • 1965eeyore Oct 16, 2008

    tv will not turn on it was playing made a bang and went out will not turn back on

  • leoven Jan 08, 2009




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open it you will get more than enough what you want for


Posted on Oct 19, 2007


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1 Answer

Why not flyback oscilate or fly back voice?

I am unable to give any specific advice but if there is voltage or power to the Line Output circuit then its possible a short or load exists on the flyback transformer which causes a shutdown in this circuit.
I am afraid practise and knowledge of a particular model is a great help to find its faults.
The Flyback transformer (if like I remember) will have sub power supplies from it to drive audio, frame etc so a short on these will cause problems, also the rectifier diodes to these can fail you may need to remove one end of a diode for accurate testing.
Another failure point in power supply rails is capacitors which go open circuit this makes their voltage line unstable, also on the capacitor problem list are those around its flyback circuit that act as snubbers to tune it, these were at my time little blue capacitors of several KV which had a habit of shorting or change value.
Any of these will disturb a balanced start up cause a spike and shutdown.
Without particular knowledge of a model and its circuit I am unable to help further, I would look for shorts on Diodes and components, disconnect supply rails to audio and frame if they come from the flyback transformer (these are the heaviest loads and will only serve those particular circuits) then it will possibly capacitors gone o/c (I used to carry a cap tester years ago which used a 555 ic easy and robust).

Hope this helps in some way...

Mar 05, 2015 | LG Televison & Video

1 Answer

Shorted horizontal output transistor

remove first the flyback and bring it to the parts vendor with fly back only genuine part of transistor.if you have diagram of that please send me a copy

Jan 31, 2014 | Sony KV-32FS13 TV

1 Answer

2165mt sony , when switching on after 1 minute horizontal transistor always shorted

better remove the flyback and bring it to the spare parts vendors who has a flyback tester and let them test it to their apparatus...or test the hv diode located at the side of fly back by your self if it got shorted (but mostly it doesn`t happens).look at your diagram and write down the original part number of transistor and it`s original trade mark and replace it after you checked the fly back and the diode(sometimes imitations don`t lasts long).

Jan 31, 2014 | Sony KV-32FS13 TV

2 Answers

I replace horizontal output transistor with new one but it happens the same short

check yoke coil for open ckt, and and check for 12 v dc supply to vertical circuit, sometimes resistor open that supply dc voltage coming from flyback transformer.

Apr 27, 2010 | Televison & Video

1 Answer

Colorful lines appear at the top of the television when turned on. picture comes out in double.

the convergance amp is not working. This could be caused by one of 3 fuses locar to the lower right of the hv or Flyback transformer they are tanish brown in color you your handing then test them with a continuity tester if one is open you can replace it with a 4 amp pico fuse
please make sure the set has been unpluged and off for some time the deflection board comes out with plastic latches around the edge unplug alll connetion escept the hv lead from the flyback this is not needed as you will just flip the board over if you don't feel confortable call a shop in your area

Dec 10, 2009 | RCA D52W20 52" Rear Projection HDTV-Ready...

1 Answer

SONY KDF70XBR950 DLP TV 6 Blinks. Is it on the G1 Board? and does anyone know the fix? Thank You.

First double-check all your connections and wiring. Make sure there is nothing looose or broken. The capacitors also could be swoolen and burned out. You can test with capacitor tester. Thermal fuse or flyback is also possible and common causes. Lamp burn out? Do you have power to the bulb socket? Power to ballast that bulb attaches to? Last solution wold be to replace the board

Oct 27, 2009 | Sony Televison & Video

2 Answers

Standard television


Sep 22, 2008 | Televison & Video

1 Answer

Need value for part R14109

R14109=750ohms 5% 1/4w (Resistor(750r5%.25W/R14109/179317) There is much more likely wrong with the TV. Resistor don't normally burn out with help, say, without a failing flyback transformer and possibly taking a transistor or two with it. If you need the manual, go to and type in "F31317" into the search field, you will several listings. If you decide to replace it yourself, here's some more part numbers in case you need them. Model: RCA\F25422TX41 Symptom: Dead Necessary parts: Transistor(Q14401) Main Voltage regulator Q14101 Resistor R14109 open. Research indicated the flyback transformer most probably bad \\CTC203AC4\HOT/D2578(Q14101/242224)* Flyback(14536119A/T14401/244229)* Main reg(P9NBSO/Q14101/244223) \Reg(MPS8599/Q14102/147665) Resistor(750r5%.25W/R14109/179317) Reg(MPSA06/Q14103/232218) Hope this helps you. ZT3000 "Beta tester of "0"s and "1's"

Aug 19, 2007 | RCA F31317 31" TV

1 Answer

I got a big problem with my tv..

Did the technician said what was wrong with the transformer?(leaky)?,It might sound like air but is High voltage leaking from the top ,be very careful when proving around there and just get it change because is not repairable and dont use it or it will damage other components.

Sep 23, 2006 | Sharp DVHR300U 109-Hours Video Recorder

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