Question about Panasonic PT-53TW53 53" Rear Projection HDTV-Ready Television

1 Answer

I attempted a repair

I believe I fixed the solder pads and the tracers that were damaged, I tested the set and still have the three blinks for the convergence board. I've read up a little on using my multimeter and was wondering if you could reccomend any resources that would give me enough detail so that I can begin to check the components that lead into the chip, I have the manual, schematics, a multimeter and most importantly time. Im currently not confident on how to test them safely with out creating a cascade of new problems. Also there are four 2.2Ohm (i think) resistors in circuit to the IC that have a slight browning around the center (not the indicators bands), other resistor with the same markings do not, I don't believe the brown to be excess flux, is this an indicator that the resistor is shot? Again any feed back is useful, I know this is a large task to take on for a novice so any basic info or refrence material would be appreciated. Thanks again, matt
P.S. - this TV is quickly becoming my white whale.

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  • Panasonic Master
  • 8,617 Answers

Yes those resistors are open. If you remove 1 leg of each of those resistors out of circuit then test them you will find that they are open, replacing those with the same rated flameproof resistors should solve your problem. You can contact me at slinteriors@yahoo.com and I will send you some Ebooks that will give you some basic instruction on electronic repair. I have a wealth of information and I dont mind sending you whatever can help you learn electronics. Its a fascinating field.

Posted on Apr 11, 2008

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The tv just went blank whiles i was watching. An oracle light writted "off timer power" is indicating. I don't know what is the problem


The most common problem with this set is the convergence chips fail.To repair this type problem you need test equipment and soldering/desoldering tools and supplies. Most repair shops can repair this problem for 150-295 us dollars. If you attempt to disassemble the tv by yourself you risk damage to a light sensor that will render the set inoperable.In other instances I have seen bad solder connections and transistor failure on the boards but all these are repairable problems. No circuit board replacement should be needed. Good luck Russmann.

Jan 21, 2011 | JVC Televison & Video

1 Answer

I got this set from a friend. I know it needs convergence ic's. It doesn't turn on, power light blinks three times. At the first attempt to turn on, high voltage circuit powers up, then resistor in...


I would prefer you stay with the original STK number but spending extra cash for unproven "better product" isn't safe in my book. Just change the 2.2ohm resistor you saw glow but carefully test all others. It's nice of them to put a kit together but not necessary. The last convergence job I did was more about getting the board out nicely than soldering the packs in. Worked great and saved loads of money. Hope yours goes as well. I didn't need any of the resistors I purchased.

Dec 19, 2010 | Panasonic PT-53WX42 53" Rear Projection...

1 Answer

Dear SD Tech, My WS-65711 suddenly stopped turning on. It will click the relay and turn on the front panel light for a couple of seconds and then turn off. I did the self diagnostics and got 2 blinks,...


Hi,

It seems that SD tech is not available at this moment unless he might have answered this question. I would be glad to help you to fix this problem.

the code 2-2 does indicates a short protect fault, which is usually caused by a failure in the convergence section. This is a very common repair in these sets. The typical repair involves replacing the convergence ICs (integrated circuits), and testing/replacing two small pico fuses.

The replacement ICs for your set are part number: STKxxx-xxx and are available from www.encompassparts.com for $19.95 each (needs two). You will also need at least one (likely two) 5 Amp pico fuses. If you wish to repair this yourself, the ICs are located on the large heat sink on the center (Power) PC board. The fuses are also on this board, near the center, location numbers: F9A04 and F9A05. You would need soldering equipment and very good soldering skills to replace these parts.

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If you were to call a local shop to repair this, the labor to replace these is roughly $250-275 (in my area) if the TV were brought in to the shop. Please add a trip charge if repaired in the home.

The fuses must be tested with a multimeter to see if they are bad. They are only $2.50 each, so most people without a meter just change them both. If the repair has any problems, like a solder bridge, you may need a meter to check them after that. A good magnifying glass helps prevent solder bridges (for me, anyway).

Let me know,if needed further assistance.

Hope i helped you.

Thanks for using ' Fixya ' and have a nice day!!

Dec 02, 2010 | Mitsubishi WS-65711 65" Rear Projection...

2 Answers

Distorted picture that curves up at the bottom of the screen


My 9 years old Mitsubishi WS-55857 had the same problem (distorted pictures) for couple of months and I was about to buy a new plasma TV. But, I found TvRepairKits.com and I decided to give a try before buying a new TV. I received a convergence repair kit in two days with web site info for detailed instructions with many picutres to explain the process. When I had questions and Ed was very prompt to answer my questions thru the e-mail. I never done solding before, but I am moderate handy person. I spent less than $100 and three hours and my TV picutre looks stunning. I went thru advanced convergence process after I repalced the convergence chips and replaced RCA video cable with better quality and my TV picture looks as good as brand new. Thansk ED for your help! From Portland Oregon

Feb 02, 2010 | Mitsubishi WS-65809 65" Rear Projection...

3 Answers

Toshiba 57H81 Flashing Red Power Light, Blown Fused F850+F852


Solved by resoldering some solder joints!!!!!!!
********
Toshiba Model 57H81 Rear Projection TV - Purchased 11-09-2001

Problem: Toshiba 57H81 Flashing Red Power Light, No Picture/Sound, Blown Fuses F850 + F852

Symptoms January, 2009:

  • Upon turning on set I got flashing red power light and nothing else.
  • Removing plug for one minute and plugging in results in:
    • Audible click, steady red power light for 2 seconds then slow flashing red light
    • Pushing power button results in steady red for about 2 seconds then slow flashing red light, no other set activity
  • Removing power cord for several hours and plugging back in made no change
    • Audible click, steady red for about 2 seconds then slow flashing red light
  • Possible related note: Over past several months occasionally the entire screen would flicker momentarily and at other times be problem free for weeks.
  • Fuses F850 and F852 found blown

Repairs Made:
  • PD0074 DEF/CON Power Board
    • There are two main power supply capacitors in this set. They are C-809 and C-810. One their negative lead on the printed circuit board re-soldered leads and nearby contacts. I’m told that because the factory left out a printed circuit board eyelet, the connection will come loose over time. When I called Toshiba customer service they said there was a known solder joint problem causing blinking red light.
    • Replaced blown fuses F850 and F852.
      • I actually installed a fuse panel on the inside of the cabinet and routed the fuse connections here instead of ordering the special fuses and replacing them on the circuit board.
      • Had to use a 5 Amp SLO-BLOW for F850. Fast blow does not survive power up. Get the red blinking light.
      • Used a fast blow 2 Amp for F852.
  • PD0073 SIGNAL Board
    • Re-soldered Q751 + Q752 STK392-110 Convergence Amps
    • Re-soldered adjacent pads that looks suspicious

Total Cost to Repair about $10
  • Twelve hours of my time over three days to research issue, disassemble set, make repairs, add fuse panel.
  • Already owned Service Manual and Circuit diagrams from a different 2004 repair.
  • Less than ten dollars at Radio Shack for fuses and fuse panel. Already had wires, etc.
  • Some solder. Already owned de-soldering tools, etc.
  • Visited both local authorized Toshiba factory service repair facilities. One said repair would have to include replacing Q751 + Q752 STK392-110 Convergence Amps with ST392-180, and realigning set for a total of $500+ and it would be more if they had to order a power board. NO THANK YOU! Other shop said $65 for site visit and $30 to make an estimate that could be applied to repair.

Jan 04, 2009 | Toshiba 57H81 57" Rear Projection...

1 Answer

Problems powering up


These sets have alot of problems with poor solder connections resolder all pins on flyback transfomer, check 3 capacitors on power/deflection board cp(150) 2200uf 16v (cp120) 220uf 35v (cp114)220uf 35v they are green with gold writing.Also it is better to fix it Now because the longer you keep trying to play set it can cause more damage to it.

Dec 13, 2008 | RCA D52W19 52" Rear Projection Television

2 Answers

I have a sony kp57ws520. The set wont turn on and the lite blinks 9 times. I was told at one time to solder two specific diodes on the g-board and that worked for a period of time. Now the problem is back....


Resoldering those parts is known as a temporary "fix". Those parts need to be replaced. I believe that they are D616 and D6301. Both are on the "G" board. I don't have a listing for your specific model, but most of thr 57s are similar.

Keep us posted.
Dan

Aug 25, 2008 | Televison & Video

3 Answers

Panasonic PT53TW53


First of all thank you for the compliment. 3 blinks on the led means shutdown due to the convergence circuits. Its an easy repair you need to replace both convergence amp ICs thier numbers are STK392-110 I will post a link where you can order replacements and they provide free installation instructions as well as free on line tech support while you do your repair by way of instant messaging. I am one of thier repair techs that does the online support. just go to this link i am posting and purchase two STK392-110 Convergence ICs they ship free anywhere in the world. If you need other items such as solder irons and what not just leave a request by clicking the contact link in the lower left collum as they sell all those items they just dont list them all, and they will respond fast telling you what they have.
http://servicemanuals.vstore.ca/

Apr 14, 2008 | Panasonic PT-53TW53 53" Rear Projection...

1 Answer

I attempted a repair on my pt-53tw53 by replacing the 110 ic chip ( the one on the diagonal heat sink) but, I think I did a bad job of soldering. When I tested the set when turning the power on the set...


You can repair any of the traces with small wires from the affected pin to the next componnent on that trace. To remove the board label all wires that you disconnect. There are "bridge" connectors that connect the signal bd and main bd. these lift up off the main board and will stay attached to the board youre working on. If you need further info please let me know. Also use solder wick to remove the solder and get a small tip solder iron 30watt from radio shack. The proper way to solder is (1) allow the iron to heat up. (2) touch the hot tip to the pin on one side and then briefly touch the solder to the other side of that pin so the solder flows around the pin. Use the solder sparingly so you dont bridge the pins with solder. (3) always check your work with a magnifying glass to insure the pins arent bridged.

Apr 09, 2008 | Panasonic PT-53TW53 53" Rear Projection...

1 Answer

Toshiba 50


1) Blown fuse ( soldered in) = caused by bad solder connects.
2) For repair = pull chassis, solder connects,replace fuse
3) Replace convergence IC's ( possibly damaged)
4) Re-assemble,test

Oct 22, 2007 | Toshiba 50HX81 50" Rear Projection...

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