Soldering issues on a Polaroid


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Soldering issues on a Polaroid

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abshaddix
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Aug 16, 2010, 12:53 AM

Post #1 of 12 (1168 views)
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Soldering issues on a Polaroid	Can't Post

I'm working on a Polaroid 42 inch TV for a friend, i'm fairly familiar with soldering and working with electronic equipment and such. However i have never seen solder that couldn't be melted. i've used 4 seperate tools to try to melt the solder on these points and it simply will not heat to the point where i can remove it. i know that the issue is bad caps on the board and i've even tried using 2 different soldering guns which my father in law uses on large machines, what the hek is going on?! thanks in advance for any advice or help!!

jts1957
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Aug 16, 2010, 1:47 AM

Post #2 of 12 (1167 views)
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Re: [abshaddix] Soldering issues on a Polaroid [In reply to]	Can't Post

Post pix of joints you're trying to desolder.

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Location: Far, Far Away

techchris
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Aug 16, 2010, 8:14 PM

Post #3 of 12 (1151 views)
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Re: [abshaddix] Soldering issues on a Polaroid [In reply to]	Can't Post

probably lead free solder which has a higher melting point.

jts1957
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Aug 16, 2010, 8:32 PM

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Re: [techchris] Soldering issues on a Polaroid [In reply to]	Can't Post

Maybe he should use an iron instead?

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Location: Far, Far Away

Buzzstpoint
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Aug 17, 2010, 2:14 AM

Post #5 of 12 (1137 views)
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Re: [jts1957] Soldering issues on a Polaroid [In reply to]	Can't Post

I've ran across joints that can't seem to be de soldered.
But usually it's not an electrical connection. It's a ground bracket. Like the tuner I just put on my TV.
4 Corners of that I couldn't melt the solder. For those type of connections I (Repair guys don't read, you may cringe) use a dremel. I use aluminum oxide disk. gently grind down the tabs just before the solder is gone.

Then use a soldering chisel and smooth it out. Put your new part on.

abshaddix
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Aug 17, 2010, 6:42 AM

Post #6 of 12 (1130 views)
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Soldering issues on a Polaroid [In reply to]	Can't Post

here is a pic of the board, even an iron with a brand new tip (40W) wasn't enough to melt it, i tried using the solder that i normally use to lower the temp resistance. nothing. i can dent it if i heat it then press hard, but that's all. it's like trying to dig through a stone wall with a spoon... i'm pretty frutrated,

sorry my phone has a shitty camera :(
thanks again for your help guys! :D

jts1957
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Aug 17, 2010, 10:09 AM

Post #7 of 12 (1127 views)
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Re: [abshaddix] Soldering issues on a Polaroid [In reply to]	Can't Post

If it involves removing the metal shield, a higher wattage iron/gun should handle it. This is where a variable power solder station comes in handy. Smile

Use higher wattage ONLY on the metal shield solder tabs, nothing else.

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Location: Far, Far Away

(This post was edited by jts1957 on Aug 17, 2010, 10:10 AM)

Buzzstpoint
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Aug 17, 2010, 12:47 PM

Post #8 of 12 (1120 views)
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Re: [jts1957] Soldering issues on a Polaroid [In reply to]	Can't Post

<span contenteditable="false"><table border=0 cellpadding=0 cellspacing=0 width="100%"><tr><td width="2%"><hr width="100%" noshade size="1" color="#A1A576"></td><td width="10%" align=center><font size=1 face="Verdana,Arial,Helvetica">In Reply To</font></td><td width="87%"><hr width="100%" noshade color="#A1A576" size=1></td></tr></table></span><div style="margin-left: 30px">If it involves removing the metal shield, a higher wattage iron/gun should handle it. This is where a variable power solder station comes in handy.<img src="http://www.tv-forums.com/images/smile.gif" alt="Smile" border="0"> <br> <br>Use higher wattage ONLY on the metal shield solder tabs, nothing else.</div><span contenteditable="false"><table border=0 cellpadding=0 cellspacing=0 width="100%"><tr><td><hr width="100%" noshade size=1 color="#A1A576"></td></tr></table></span>

I dont know if mine can be converted to wattage. I dont use electric soldering irons.
I use a Butane solder iron. It's adjustable for different temps. It's an all around universal tool for me. Keep the tip off and I can have a mini heat gun, or take the solder adapter off and I have a mini torch.

techchris
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Aug 17, 2010, 2:37 PM

Post #9 of 12 (1118 views)
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Re: [Buzzstpoint] Soldering issues on a Polaroid [In reply to]	Can't Post

well you have answered your own question. so buy a power solder station like the rest of us.

jts1957
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Aug 17, 2010, 8:34 PM

Post #10 of 12 (1115 views)
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Re: [Buzzstpoint] Soldering issues on a Polaroid [In reply to]	Can't Post

You forgot to mention the cigarette/cigar/fire starting functions. Smile

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abshaddix
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Aug 19, 2010, 10:18 AM

Post #11 of 12 (1098 views)
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Soldering issues on a Polaroid [In reply to]	Can't Post

ok, so i figured out that my issue WAS heat. got that taken care of now that i have replaced the caps that were bubbled the TV is still doing the same thing. i can use it for hours at a time, but once i turn it off then try to turn it back on it posts the splash screen. if any of you need any specific information it's a Polaroid TLX-04244B. it's not very old. a little over a year, but i guess these things are natorious for problems like this. Anyways, if any of you guys have any ideas let me know! thanks!

darstr
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Aug 19, 2010, 7:26 PM

Post #12 of 12 (1091 views)
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Re: [abshaddix] Soldering issues on a Polaroid [In reply to]	Can't Post

Without sounding like a tool. Your problem is it's a Polaroide.

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