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PCB Lifting Tracks - How to Repair ?


pigsie

Question

Hi Guys,

 

I am currently completely rebuilding a Gottlieb Sys 1 Power Supply. I have stripped the pcb of most components, cleaned it and before I start reinstalling new components I would like to know the best way to repair lifting tracks.

 

This power supply was probably one of the worst I have ever seen. But believe it or not, it was working. Apart from the burn marks, which I don't think you could ever get rid of, hopefully it will be as close as possible back to as new condition and provide another 25 years trouble free service when rebuilt.

 

Before

[ATTACH]1860[/ATTACH][ATTACH]1859[/ATTACH]

 

Cleaning

[ATTACH]1861[/ATTACH]

 

After

[ATTACH]1862[/ATTACH][ATTACH]1863[/ATTACH]

 

Lifting PCB Tracks

[ATTACH]1865[/ATTACH]

 

Regards

Pigsie

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Personally when its that bad I would use wire to jump it.

 

Yes in most cases if the track was lifting in the middle or there was a break in the track I would jumper the track from component to component. What I was wondering is whether anyone has tried to re-adhere the tracks, in particular the component solder rings to the pcb. My concern with this board is that there are a few components where all the solder rings have lifted and hence the component when soldered to these lifted rings has no mechanical bond to the pcb and is floating with the lifted track.

 

Regards

Pigsie

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Pigsie, What a mess, I have a heap of these power supplies that have been overhauled and in excellent working condition, you can have one for $50.

By the look of the track damage on your current board, I can't see it being a very reliable board for years to come. Its one of the worst that I have ever seen in my many years of fixing these fuckers.

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dont bother trying to glue the tracks back to the pcb.

grab a stanley knife and cut the lifted track off.

the part you cut out replace it with a leg off a resistor or similar.

generally if the track has lifted from the pcb, it has been reapired by soldering iron with the iron temerature either too hot or the iron has been on there too long or both

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Yes in most cases if the track was lifting in the middle or there was a break in the track I would jumper the track from component to component. What I was wondering is whether anyone has tried to re-adhere the tracks, in particular the component solder rings to the pcb. My concern with this board is that there are a few components where all the solder rings have lifted and hence the component when soldered to these lifted rings has no mechanical bond to the pcb and is floating with the lifted track.

 

Regards

Pigsie

 

If the component is floating you can buy a small tube of an electrical grade silicone sealant (Dow Corning 738) to stop any movement (don't use household silicon). But looking at the damage to that pcb, personally, I'd go with boxerdogforever's suggestion and buy one of his overhauled boards. A much better investment when it comes to reliability in the long term.

 

Regards,

 

JWG.

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