Question about Panasonic PT-47WX53 47" Rear Projection HDTV

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Panasonic pt-47wx53g horizontal outout transitor short whit new transistor flyback voltage are all to low the tv does notlight up the crt

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Hello oncle_jc,

You may have a problem with your flyback transformer, I would suggest that you perform a ring test to see if any of your windings on the flyback are shorted. In addition You may want to also check the input to the Horizontal Output Transistor, to see if the driver pulses are of the proper amplitude. Besides these two things the only other issue colud the the high voltage trippler (if this is not part of the flyback). Check these things, you will need the following equipment:

1) oscilloscope

2) voltmeter (multimeter set to DC volts)

3) High Voltage probe

4) A test set that can perform a ring test (My shop uses the Sencore LC102)

Or what you can do is take the flyback out and take it to a TV shop and for a small fee they can run the test for you, (My shop usually charges $20.00 - $30.00 for this

I hope this helps

Shuttle83

http://www.electron-age-technologies-llc.com

Posted on Feb 24, 2009

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My Panosonic TV Model# PT-47WX53g has sound but no picture


Part is C509 located on D board:

It is a .47 @ 200 volts and the location is marked top and bottom on the board.

Examine the attached photos (cap has been removed but you will see exactly where it is located).

Let me know if you have questions

1_17_2012_8_01_42_pm.jpg1_17_2012_8_02_06_pm.jpg

Jan 17, 2012 | Panasonic PT-47WX53 47" Rear Projection...

2 Answers

No power


Ypu will first have to check the horizontal output transistor and make sure it is not shorted. The voltage for the horizontal output transistor comes from pin14 of the SMPS transformer. Then it goes through the coil,L815, then to the diode for B+,D825. Then the B+ goes through coil L816. Be sure after D825 you check the capacitor, C830, as this is a very common fault with this set. Then the B+ flows through L817, then through two One ohm resistors, R857 and R858 to pin8 on the flyback transformer. If you get B+ on pin 8 of the Fly, and none on the horizontal output transistor, the fly is open and is bad. I have a schematic that is very close to this set but not an exact one, but most of these sets are about the same, and if you know anything about Panasonic TV sets, you should be able to repair them with a schematic from another set. BTW, this Horizontal and fly circuit is on the D board. If you wish to have a copy of the service manual for a set close to yours, I will send you a copy. If you follow these instructions, you should be able to find the fault with this TV set. If the SMPS is not working, you will not get any voltage also on the HOT. Good Luck

Jul 02, 2007 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

Pt 56wx 33g panasonic tv blinks 5 times ,i tested with out the covergence chip and still blinks 5 times


Three blinks is the indication of the convergence IC's. The five blinks that you are seeing is from another source. You have a short in your High Voltage Circuit, I would suspect the Horizontal Output Transistor or HOT. It should be IC401 on this set. If you test it in circuit the transistor is coupled with a tranformer and a diode. The best way to test it is to pull it out and use a diode tester on it, you should not read 0 ohms on any lead, if you do it is bad. You may also have a bad flyback transformer that may have caused the problem, also check the coil that feeds the trasistor for ring cracks and repair them at the same time.

This should help you get this set up and running.
If you have any futher questions please respond to this post.

Thanks for using FixYa
asnowman

Feb 03, 2011 | Panasonic PT-53WX52 53" Rear Projection...

1 Answer

Panasonic CinemaVision PT-47WX53G : half the screen is distorted


did you try to try to adjust the vertical and the horizontal of your tv?

Oct 05, 2009 | Panasonic PT-47WX53 47" Rear Projection...

2 Answers

No picture


I disagree with given info, this tv has no horizontal output transistor because it is dlp tv.
3 red light blink means lamp cover is not placed back properly after lamp replacement/ lamp checking. Make sure lamp cover is fixed back in its place securely and tight.


Jul 16, 2009 | Sony Grand WEGA KF42WE610 42" Rear...

3 Answers

HORIZONTAL OUTPUT TRNSISTOR SHORTS WHEN POWER ON TV


ALL the next is with the tv unplugged (NO NO power)
  • resold the jungle (video processor) all around
  • following the horizontal drive pulse path and arriving to the horizontal area just after the horizontal transformer and in the base of the horizontal DRIVER there is a electrolytic capacitor (if this chassis uses this one,) Change it (maybe is dry)
  • solder all components i just told you in the last step. horizontal driver, transformer, etc
  • remember:
  • if a transistor is blowing with no reason (there is a reason: the collector receives 130 volts but cannot hold it forever, It has to be in some place. if the switching pulse doesn't arrive to it the transistor throws this 130 volts and burning itself. i hope it is help full.

Apr 15, 2009 | Projection Televisions

1 Answer

When a push the power my tv do not want turn on only hear a click noise


This usually indicate a problem with the flyback, or the horizontal output transistor. Most TV problem is not repairable by the user, because of it's complexity. If you like reading, and honestly like to learn on your own, it is not so hard to learn to fix electronic device such as TV. Unfortunately a TV is not something you can look at and figure out how it works. I would suggest start by reading electronic books, preferably the ones with projects to help you learn how electonic device are put together to make a working circuit. The most I can help you with is look for the horizontal output transistor it is square with 3 pins, and is mounted on aluminum heatsink to dissipate heat. One of its pin would be connected to the flyback and the horizontal yoke.(The yoke would be the copper winding on the neck of the tube) be careful you don't touch the thick wire from the flyback to the back of the tube because a tv tube can carry large amount of lethal charge even if not plugged in! Take that transistor out of the circuit and test it with an ohmmeter. Set the meter to "diode" with the transistor facing you. the first pin is the base. Connect the red wire to that then the black pin should read around 0.4 voltage drop it maybe a little highe on the other two pins.. If you get a reading that is low it is shorted out. Note tho that some horizontal output transistor have a resistor connected to the first, and last pin (base emmiter junction) then it gets confusing. If in doubt just replace it. The cost of a horizontal output transistor is around a few bucks. Make sure you buy two of them! If the TV turned on after you raplace it but later failed again. You have to replace the flyback too. This time use your spare transistor along with a new flyback, which cost from 20- 50 dollars. Hope this helps.

Mar 22, 2009 | JVC AV-65WP74 Rear Projection Television

1 Answer

I have projection TV 55PP9363H/17 SOUND NO PICTURE.


check the horizontal output transistor, it could be open.

Jun 19, 2007 | Philips 60PP9352 60" Rear Projection...

1 Answer

Panasonic pt-47wx53g


You will have two of the STK392-110's in the set so a good idea to replace both. The reason is one of the IC's is dedicated to RED horizontal and vertical and then GREEN horizontal, the other is dedicated to the BLUE horizontal and vertical and then the GREEN vertical. These are the best place to start for ghosting in the colors.

Mar 12, 2007 | Sony KP-51WS500 51" Rear Projection...

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