Question about Televison & Video

1 Answer

Hello, I saw a solution posted by one of you experts (Chu)regarding a Panasonic PT-47WX42F model with convergence problems. My set seems to have the same bug. The green screen went way out of whack during a thunderstorm and I suspect a chip got zapped. Chu said there were some resistors and SK-type chips that need to be replaced (costing around $300 to $350 at the service shop). I'm pretty handy with a soldering iron - SMT's, too - and if you can elaborate on which chips may have been toasted, I'd like to take a crack at getting this old PTV back in shape again (the green shape in particular). If I have to spend a few hundred dollars, I'd probably just get a new set, anyway. Thanks, , ,

Posted by on

  • gdnorwick May 27, 2010

    Have not completed the recommended fix yet but it sounds like a good place to start.

×

Ad

1 Answer

  • Level 3:

    An expert who has achieved level 3 by getting 1000 points

    Superstar:

    An expert that got 20 achievements.

    All-Star:

    An expert that got 10 achievements.

    MVP:

    An expert that got 5 achievements.

  • Master
  • 19,396 Answers

Hi.

The job is done replacing two convergence ICs. The ICs are located on the convergence board.
The original ones are two STK-392-110. This can be replaced with two STK-392-150 that are more efficient.

The IC cost about $15/$20 each.

Here the parts:

Original one: Semiconductor STK392-110

Better replacement:STK392-150 Convergence IC.

Here the part:

Hello, I saw a solution - e5b2239.jpg

Here how do they look inside a Panasonic rear projection:

a7117ab.jpg

See here the repair from where the above picture was taken.


Posted on May 25, 2010

  • gdnorwick May 27, 2010

    Yes, I see these amps. I'll go ahead and change them then see how it looks. Chu had also mentioned some resistors that might have gone bad. There are about a dozen of some hi-wattage type scattered around the IC's. Are these what he was refering to? Would it be worthwhile to go ahead and replace these, too? Thanks, , ,

  • Ginko
    Ginko May 27, 2010

    Hi.

    Yes, better testing continuity on resistors on convergence board (read Ohms with power off ensuring the resistors are not open). The resistors at the base of the IC may blow when an IC is lfunctioning. Check also if any of the capacitors is bulged or burnt and leaking. Convergence ICs are power amps, when they fail they cause an abnormal draw, this can often blow nearby components. Check also the resistors near to convergence board connector, they may also blow when ICs fail.


×

Ad

1 Suggested Answer

6ya6ya
  • 2 Answers

SOURCE: I have freestanding Series 8 dishwasher. Lately during the filling cycle water hammer is occurring. How can this be resolved

Hi,
a 6ya expert can help you resolve that issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
the service is completely free and covers almost anything you can think of.(from cars to computers, handyman, and even drones)
click here to download the app (for users in the US for now) and get all the help you need.
Goodluck!

Posted on Jan 02, 2017

Ad

Add Your Answer

Uploading: 0%

my-video-file.mp4

Complete. Click "Add" to insert your video. Add

×

Loading...
Loading...

Related Questions:

1 Answer

Panasonic model pt-47wx42f picture is doubled and blue around the edges


Thats a convergence issue. You can get the convergence repair kit for your model at www.tvrepairworld.com the kit contains the components and the CD with detailed instructions.

Dec 20, 2009 | Televison & Video

1 Answer

I have a 2002 Panasonic Model PT-47WX42F I have a red shadow in the screen. In other words when you see the channel info there is a red shadow of the same info. Whats broke? Mike


This is a convergence output IC problem. convergence board would have to be removed - remove and replace 2 STK IC's and check the surrounding resistors.Shops usually charge between $200-$300

Sep 26, 2009 | Televison & Video

1 Answer

Panasonic T.V. model number PT-47WX42F no picture or sound


R800 open on power board next to the relay.the resistor value is1.5 ohms 10 watt resistor.

Jul 15, 2009 | Panasonic PT-47WX42 47" Rear Projection...

1 Answer

Convergence for Panasonic 47"


Yes it is that set uses the same IC STK392-110 You can get the new ICs at this link and they will provide free installation instructions with pictures as well as free on line tech support instant messaging while you do the repair. heres the link.
http://servicemanuals.vstore.ca/

Apr 14, 2008 | Panasonic PT-47WX49 47" Rear Projection...

1 Answer

TV powers on for about 5 seconds and then powers off


I really dont think resistors need changing on this make and model first check hori out put NTE2973 capiactor may be burnted 1200pf 2kvolt, this is what i found wrong with customer set after getting tvs high voltage up then i saw that convergence ic needed to be changed out also.If you need more help let me know ive been up all night,will answer as soon as i can.

Mar 06, 2008 | Panasonic PT-51HX41 51" Rear Projection...

2 Answers

Panasonic HDTV Projection PT-47WX42F won't turn on


Your Set is going into shutdown mode due to the convergence section of your television. Thats what 3 blinks mean. It could be just the Convergence ICs and resistors or you may need a new Signal board TNP2AH035 Let Me know if you need further assistance with this problem.

Feb 16, 2008 | Panasonic PT-47WX42 47" Rear Projection...

2 Answers

Panasonic 47wx42f projection


Joe,
It sounds like your may need to replaced your convergence ic's loc# ic7001 and ic7002 stk392-110. That should take care of your alignment problem.

Dec 03, 2007 | Panasonic PT-53WX42 53" Rear Projection...

2 Answers

Panasonic- 47wx42f


Changing the convergence amp IC's is usually the first step..
Then let us know.............T.

Dec 02, 2007 | Panasonic PT-47WX53 47" Rear Projection...

1 Answer

No voltage to convergence chips


There are usually 2 micro fuses that resemble 1/4 watt resisters around the power supply, and are usually all green,tan or yellow, and in most cases will have a + or - voltage marked right near these fuses 20 to 25 volts dc typical.

Jun 25, 2007 | Panasonic PT-47WX49 47" Rear Projection...

Not finding what you are looking for?
Televison & Video Logo

Related Topics:

37 people viewed this question

Ask a Question

Usually answered in minutes!

Top Televison & Video Experts

The Knight
The Knight

Level 3 Expert

74383 Answers

Donald DCruz
Donald DCruz

Level 3 Expert

17130 Answers

Electro Med Services...
Electro Med Services...

Level 3 Expert

6694 Answers

Are you a Televison and Video Expert? Answer questions, earn points and help others

Answer questions

Manuals & User Guides

Loading...