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#1
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Cheap solder joints- rant
Furnace went out last night (oil-fired 'boiler'). A little debug showed
some sparking under a relay that controls the burner and circulation pump. Bad solder joint where the relay soldered to the circuit board. A small contact lead going through a large hole, 1 sided circuit board, the thru-hole wasn't plated. Minimal solder, no fillet. Resoldered tyhe rest of the relay connections, needless to say. Cheap *******s. Honeywell Aquastat L8148A Dave |
#2
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Cheap solder joints- rant
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#3
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Cheap solder joints- rant
I'm seriously thinking of getting a good solder-sucker. I'm surrounded
by stuff just waiting to go belly-up. Dave |
#4
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Cheap solder joints- rant
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#5
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Cheap solder joints- rant
wrote in message ups.com... Furnace went out last night (oil-fired 'boiler'). A little debug showed some sparking under a relay that controls the burner and circulation pump. Bad solder joint where the relay soldered to the circuit board. A small contact lead going through a large hole, 1 sided circuit board, the thru-hole wasn't plated. Minimal solder, no fillet. Resoldered tyhe rest of the relay connections, needless to say. Cheap *******s. Honeywell Aquastat L8148A Dave My initial reaction, I thought you were going to say it was a Carlin. Bob |
#6
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Cheap solder joints- rant
Each manufacturer is a cheap so-and-so these days.
A little more solder, or a plated hole, or a hole that wasn't so oversized, and it'd last until the relay fried. Dave |
#7
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Cheap solder joints- rant
mm wrote:
On Fri, 18 Nov 2005 12:03:02 -0600, J Kelly wrote: My dad's furnace quit a few years ago on Christmas Eve. Furnace guy Did you check the flue for Santa Claus? Some times he goes down the wrong chimney and gets stuck. came out, said the controller boards was dead. He replaced it, then waited around a bit just to be sure it was going to continue to work ok since the old one was intermittent and he didn't want to be called back the following morning. I looked at the old board and found a cold solder joint, luckily I just so happened to have my pinball I had a summer job at the US Naval Avionics Facility in Indianapolis in 1966. Part of my job was to deliver the internal mail. In one part of the buildingt, they had troughs of molten solder, though which they tried to pass circuit boards, the bottoms about even with the surface so that all the joints would solder at once, without people doing it. One problem was getting a very flat pool of solder. I don't know what the other problems were, but they had been working on it before I got there, they did so all summer, and they were still at it when I left. I don't know if anyone ever solved this problem. I think I'm allowed to talk about this now. machine reapir kit with me which had a soldering iron. Resoldered the connection on the board and had him put it back in. Worked great. The repairman was amazed, and dad was happy that he saved a couple hundred on the part. Cold solder joints are a real problem with electronics and it seems to have gotten worse in the past couple years with all the korean and chinese made junk. Remove NOPSAM to email me. Please let me know if you have posted also. Hi, Todays service people are mostly lack good electronics knowledge. My Carrier furnace had same kinda problem. After Googling and investigation, it was apparent due to the heat from two hi Wattage resistors on control board, couple solder joints were compromised. After resoldering and drilling few holes on the plastic cover around the resistors for better cooling, every thing is working OK again. Locally replacement board was 320.00CAD plus tax which I did not need. Tony |
#8
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Cheap solder joints- rant
Tony Hwang wrote:
mm wrote: On Fri, 18 Nov 2005 12:03:02 -0600, J Kelly wrote: My dad's furnace quit a few years ago on Christmas Eve. Furnace guy Did you check the flue for Santa Claus? Some times he goes down the wrong chimney and gets stuck. came out, said the controller boards was dead. He replaced it, then waited around a bit just to be sure it was going to continue to work ok since the old one was intermittent and he didn't want to be called back the following morning. I looked at the old board and found a cold solder joint, luckily I just so happened to have my pinball I had a summer job at the US Naval Avionics Facility in Indianapolis in 1966. Part of my job was to deliver the internal mail. In one part of the buildingt, they had troughs of molten solder, though which they tried to pass circuit boards, the bottoms about even with the surface so that all the joints would solder at once, without people doing it. One problem was getting a very flat pool of solder. I don't know what the other problems were, but they had been working on it before I got there, they did so all summer, and they were still at it when I left. I don't know if anyone ever solved this problem. I think I'm allowed to talk about this now. machine reapir kit with me which had a soldering iron. Resoldered the connection on the board and had him put it back in. Worked great. The repairman was amazed, and dad was happy that he saved a couple hundred on the part. Cold solder joints are a real problem with electronics and it seems to have gotten worse in the past couple years with all the korean and chinese made junk. Remove NOPSAM to email me. Please let me know if you have posted also. Hi, Todays service people are mostly lack good electronics knowledge. My Carrier furnace had same kinda problem. After Googling and investigation, it was apparent due to the heat from two hi Wattage resistors on control board, couple solder joints were compromised. After resoldering and drilling few holes on the plastic cover around the resistors for better cooling, every thing is working OK again. Locally replacement board was 320.00CAD plus tax which I did not need. Tony Hi, Koreans and Chinese make things whatever spec. calls for. They're not making junk. Given specification is junk. By whom? You guess. Tony |
#9
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Cheap solder joints- rant
In article , mm wrote:
I had a summer job at the US Naval Avionics Facility in Indianapolis in 1966. Part of my job was to deliver the internal mail. In one part of the buildingt, they had troughs of molten solder, though which they tried to pass circuit boards, the bottoms about even with the surface so that all the joints would solder at once, without people doing it. One problem was getting a very flat pool of solder. I don't know what the other problems were, but they had been working on it before I got there, they did so all summer, and they were still at it when I left. I don't know if anyone ever solved this problem. Yes, they did. It was up and running, and had been for some time, when I started working there in '82. -- Regards, Doug Miller (alphageek at milmac dot com) It's time to throw all their damned tea in the harbor again. |
#10
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Cheap solder joints- rant
The lead-free solders are a problem, too. A lot of the techs trained
on lead-containing solders don't know how to use the mostly tin replacements. Another problem with the newer ones is the formation of tin whiskers, which I believe is a crystallization process over time, leading to the degradation of the joint. The cold solders vary in quality, the best are silver-powder containing epoxies. Needless to say, most are worse, and many manufacturers do not make the design changes necessary to accommodate the different characteristics of cold solder. Ergo, defective parts.-Jitney |
#11
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Cheap solder joints- rant
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#12
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Cheap solder joints- rant
Nowadays, through-hole components are soldered by passing the boards
over a wave of solder, as opposed to a flat pool. http://www.novastarinc.com/wave.html...FQPNPgodTwk0Sw Not sure when these came about. Dave |
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