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Electronics Repair (sci.electronics.repair) Discussion of repairing electronic equipment. Topics include requests for assistance, where to obtain servicing information and parts, techniques for diagnosis and repair, and annecdotes about success, failures and problems. |
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#1
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Solder "Bridging" Broken "Traces" (printed conductors)
Hi,
When I repair a set with a crack in the PCB, I usually run a wire/s to "bridge" broken "traces" that are very fine. Do you know a technique to solder bridge fine printed conductors? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active key logger (spyware) in your PC. |
#2
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I would think putting a wire to join the bridges where there are breaks
in the traces, is a stronger way of doing this. Just simply bridging a break with a bit of solder, and having no re-enforcement would not be as strong. The finer a trace, the more fragile it will be, especialy if the board has been cracked from damage. -- Jerry G. ====== "Brad" wrote in message ... Hi, When I repair a set with a crack in the PCB, I usually run a wire/s to "bridge" broken "traces" that are very fine. Do you know a technique to solder bridge fine printed conductors? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active key logger (spyware) in your PC. |
#3
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I use Kynar wire wrap wire.
-- Jammy Harbin J & J Electronics, Inc. 227 S. 4th St. Selmer, TN 38375 731-645-3311 "Brad" wrote in message ... Hi, When I repair a set with a crack in the PCB, I usually run a wire/s to "bridge" broken "traces" that are very fine. Do you know a technique to solder bridge fine printed conductors? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active key logger (spyware) in your PC. |
#4
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There are repair kits for that (with spare copper traces to use in varius
thicknesses and angles). Very useful when broken a series of data bus (eg 10 parallel lines). There are even eye-lets (spare parts for thru-hole double side boards that have holes destroyed). In common boards, use thin cables as other have already mension, but first make sure that you use glue (2 parts epoxy one preferable not contactive) to make mechanical resistance in vibration of a broken board. The glue if possible should be used on the oposite side of the solderings. If glue cannot be used, use flexible cables to concatenate the join leaving 1mm extra cable in -^- shape, so the ^ will take the vibrations. "Brad" wrote in message ... Hi, When I repair a set with a crack in the PCB, I usually run a wire/s to "bridge" broken "traces" that are very fine. Do you know a technique to solder bridge fine printed conductors? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active key logger (spyware) in your PC. |
#5
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Brad wrote: Hi, When I repair a set with a crack in the PCB, I usually run a wire/s to "bridge" broken "traces" that are very fine. Do you know a technique to solder bridge fine printed conductors? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active key logger (spyware) in your PC. First, i evaluate the type of break and if the board is structurally intact. Sometimes i have put epoxy on the top level for some reinforcement. I then use a fine sand paper and a cutter tool to remove the paint from the copper traces. Then i put some flux on the break points and lightly tin the damaged area. I save clipped components leads to bridge the larger areas. Sometimes multiple leads are used on a large ground trace or power buss. I save some thin stranded wire for tougher repair pieces. I pull a thin strand out and then overlay it on one end of a damaged trace. I tack one end, and shape it for contour. I then tack the other end down. Then carefully try to fill in the rest. I use a very thin tipped solder pencil for the smallest traces. In some cases, i have used wirewrap wire to bridge point to point. No need to strip it. A little heat and you can tin the ends easily. Bob -----= Posted via Newsfeeds.Com, Uncensored Usenet News =----- http://www.newsfeeds.com - The #1 Newsgroup Service in the World! -----== Over 100,000 Newsgroups - 19 Different Servers! =----- |
#6
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"Brad" wrote in message
... Hi, When I repair a set with a crack in the PCB, I usually run a wire/s to "bridge" broken "traces" that are very fine. Do you know a technique to solder bridge fine printed conductors? Thanks in advance, Brad Before you type your password, credit card number, etc., be sure there is no active key logger (spyware) in your PC. Assuming no high f problems are likely I tend to take varnish covered thin copper wires back either way to solder points at the end connectors. If many traces and no hf prob. then I tend to platt/plait them together into a braid. electronic hints and repair briefs , schematics/manuals list on http://homepages.tcp.co.uk/~diverse |
#7
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I use PVA (woodworkers/white) glue to repair the board, and fine wire or just solder to bridge the traces. N "Brad" wrote in message ... | Hi, | | When I repair a set with a crack in the PCB, I usually | run a wire/s to "bridge" broken "traces" that are very fine. | Do you know a technique to solder bridge fine printed | conductors? | | Thanks in advance, Brad |
#8
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I wonder what kind of glue others use. I have always preferred epoxy. I
have been afraid that white glue might absorb moisture from the air and become conductive or corrosive. Has anyone had any problems with glues like this? Remember the brown glue that causes corrosion when it gets old in the televisions and audio products from the 80s and early 90s? Leonard "NSM" wrote in message news:Cii7d.7350$223.6671@edtnps89... I use PVA (woodworkers/white) glue to repair the board, and fine wire or just solder to bridge the traces. N "Brad" wrote in message ... | Hi, | | When I repair a set with a crack in the PCB, I usually | run a wire/s to "bridge" broken "traces" that are very fine. | Do you know a technique to solder bridge fine printed | conductors? | | Thanks in advance, Brad |
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