Soldering connection broken on TV ? Need help.

Reply

  #1  
Old 12-01-19, 10:54 AM
Member
Thread Starter
Join Date: Dec 2019
Location: United States
Posts: 9
Received 0 Votes on 0 Posts
Soldering connection broken on TV ? Need help.

Hi ,

My Samsung TV has no picture ,but sound is Ok. I narrowed it down to the Y-sustain board {from a TV forum }.

So I removed back and looked for blown/swollen fuse/caps ,but they all look great.

I zoomed in with phone to take pics of the board number in case I needed to replace it.

After examining the pics I noticed something.

It looks like the soldering has broken and wondering if this can be soldered . I don't want to bring it in for repair and have to pay a consultation fee if it isn't repairable.

The bigger picture of entire back of TV shows the Y- board on the left, the area in question is that blue square which I zoomed in on.

Here's a pic,please tell me if you see the soldering break too.
Thanks so much.

Name:  tv1.jpg
Views: 94
Size:  98.1 KB

Name:  tv2.jpg
Views: 69
Size:  209.4 KB
 

Last edited by PJmax; 12-01-19 at 11:19 AM. Reason: resized pictures
Sponsored Links
  #2  
Old 12-01-19, 11:22 AM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 53,582
Received 416 Votes on 389 Posts
Welcome to the forums.

Excellent pictures.
The legs on the transformer could be cold soldered. It certainly wouldn't hurt to resolder them. However..... that looks like a power supply transformer and if it weren't working correctly you probably wouldn't have sound either.

Did you reseat all plugs and connectors..... especially the ones from the screen.
Are the back lights working ?
 
BlueRain voted this post useful.
  #3  
Old 12-01-19, 11:33 AM
Member
Thread Starter
Join Date: Dec 2019
Location: United States
Posts: 9
Received 0 Votes on 0 Posts
Hey thanks for the reply.

The power board is the one in the middle of big picture,so there's power.

This model the Y-sustain board is a known problem, {blown caps} many people buy a new Y board.They're hard to find now.

I don't have any blown caps, just the bad solder joints I shown here.So I'm thinking that's the problem.

Yes ,I tried reseating everything, TV turns on ,everything works , I can hear the audio and even the sounds when I move around remote .

What do you mean by back light ?

What's cold soldering ?

Thanks so much for your time !
 
  #4  
Old 12-01-19, 11:36 AM
Member
Thread Starter
Join Date: Dec 2019
Location: United States
Posts: 9
Received 0 Votes on 0 Posts
Here's an even more close up picture. What's that thing that looks like a rod ,is that suppose to go into the square that came off from?

Thanks
 
Attached Images  
  #5  
Old 12-01-19, 12:09 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 53,582
Received 416 Votes on 389 Posts
That is a transformer. The copper wires from the windings come out, are wrapped around those square pins and then soldered. Very rarely is there a problem on the transformer itself. The problem is where the pins are soldered thru the pc board.

The back lights are the lights behind the LCD screen that shine thru the LCD.
 
BlueRain voted this post useful.
  #6  
Old 12-01-19, 12:18 PM
Member
Thread Starter
Join Date: Dec 2019
Location: United States
Posts: 9
Received 0 Votes on 0 Posts
Ok , can I just desolder the mess out and just solder everything ?

It's so small I don't see how I can wrap them around the square pins.

How do I check the backlight if there's no picture?

Thanks again.

PS: I'm watching soldering videos :}
 
  #7  
Old 12-01-19, 12:26 PM
Join Date: Jan 2009
Location: Trumbull, CT, USA
Posts: 415
Received 3 Votes on 3 Posts
Looks like a plasma (correct me if I am wrong) television and they have no backlights as their is no LCD screen
 
BlueRain voted this post useful.
  #8  
Old 12-01-19, 12:30 PM
Member
Thread Starter
Join Date: Dec 2019
Location: United States
Posts: 9
Received 0 Votes on 0 Posts
Yes it's a Samsung Plasma, one of the greatest TV's ever built and I don't want to part with it.

When I power it up the green light blinks on the main board lower right on big pic. top right is the X board and power board is in the middle ,and of course the Y board {problem board} is on the left .
 
  #9  
Old 12-01-19, 12:46 PM
PJmax's Avatar
Group Moderator
Join Date: Oct 2012
Location: Northern NJ - USA
Posts: 53,582
Received 416 Votes on 389 Posts
Plasma TV's are not that easy to repair.
Sometimes it more cost effective to buy used boards from ebay and swap them in.
I've seen entire sets sold inexpensively due to a cracked screen.
 
  #10  
Old 12-01-19, 01:01 PM
Member
Thread Starter
Join Date: Dec 2019
Location: United States
Posts: 9
Received 0 Votes on 0 Posts
I'll try to solder it first,if I can't do it I'll just try and find a used board.

Thanks for your time,appreciate it.
 
  #11  
Old 12-01-19, 01:07 PM
Member
Thread Starter
Join Date: Dec 2019
Location: United States
Posts: 9
Received 0 Votes on 0 Posts
Just bought a simple soldering kit, won't arrive until Thursday.

I'll report back on my results.

Thanks again.
 
  #12  
Old 12-01-19, 02:56 PM
Member
Join Date: Mar 2010
Location: USA
Posts: 3,614
Received 24 Votes on 24 Posts
Cold solder joint -- A badly soldered joint typically resulting from not enough heat applied or the wires or parts moved before the solder cooled down. It may more may not be a good electrical connection and could deteriorate due to oxidation if it was good enough to start with.

Usually reheating the joint until the solder melts will fix it.
 
BlueRain voted this post useful.
  #13  
Old 12-01-19, 03:04 PM
Member
Thread Starter
Join Date: Dec 2019
Location: United States
Posts: 9
Received 0 Votes on 0 Posts
Thanks Allan ,very helpful .
 
  #14  
Old 12-01-19, 05:06 PM
Member
Thread Starter
Join Date: Dec 2019
Location: United States
Posts: 9
Received 0 Votes on 0 Posts
Update, I verified 100% it is the Y board ,so it has to be them bad solder joints.

How I found out, I watched a youtube video , the guy said the green light { that I mentioned in previous post } on main board {which also has the logic board [COLOR=left=#333333]integrated } has to blink once every second ,if not , and blinks about once every 5 seconds then it's a bad Y board.

Mine was blinking about once every 5 seconds.

In order to troubleshoot it and make sure it was the Y board I disconnected the Y board from all the other boards, and sure enough it started to blink once every second.

So the odds are high that fixing the solder joints should fix it.

I'll update once I get my soldering kit.[/COLOR]
 

Last edited by BlueRain; 12-01-19 at 05:53 PM.
  #15  
Old Today, 02:44 PM
Member
Join Date: Jun 2012
Posts: 910
Received 3 Votes on 3 Posts
Those solder joints look pretty health to me, doubt that's your problem.
 
Reply

Posting Rules
You may not post new threads
You may not post replies
You may not post attachments
You may not edit your posts

BB code is On
Smilies are On
[IMG] code is On
HTML code is Off
Trackbacks are Off
Pingbacks are Off
Refbacks are Off


Thread Tools
Search this Thread
Display Modes
 
Ask a Question
Question Title:
Description: