- Fine pitch trace repair - 2 Updates
- Hooray! Fixed! - 3 Updates
| Ralph Mowery <rmowery28146@earthlink.net>: Dec 04 11:56AM -0500 In article <6ilND.346771$nH2.322928@fx26.iad>, no.spam@please.net says... > Fine wire. Pre-tin it, solder to one side of the break, pull straight > and solder the other side. Make sure the track has wettable surfaces > exposed first, or course. Yes, very fine wire. You may be able to pull a strand out of some stranded wire that will be fine enough. If the circuit board is solder masked (traces covered with insulating material) scrape it off first. Apply some liquid flux to the just cleaned trace. Good magnifying glass helps. I use a stereo microscope when I work on boards, but doubt you want to spend around $ 200 for a Amscope 10 and 20 X xcope. |
| stratus46@yahoo.com: Dec 04 03:18PM -0800 On Monday, December 3, 2018 at 5:53:55 PM UTC-8, bitrex wrote: > Palette inverted: > <https://www.dropbox.com/s/m05pikt3yexq2f6/2018-12-3%2018-11-30.jpg?dl=0> > Any suggestions for mending a break on a trace like this? 1 strand of the wire in a computer cable (RS-232, parallel printer) is small enough for a repair like that. Clean and tin the traces and tack the splint on top. A flux pen can be helpful. I've donee these reapirs on 8 mil traces afer acid samage from leaking 'lytics. G² |
| John Robertson <spam@flippers.com>: Dec 03 05:44PM -0800 On 2018/12/03 5:31 PM, Terry Schwartz wrote: > Just like early Bally SS machines.... Game Plan MPUs are worse for battery self-destruction. The battery is on the side of the board, not the bottom, so the eating is good (for the alkaline)! John ;-#)# -- (Please post followups or tech inquiries to the USENET newsgroup) John's Jukes Ltd. MOVED to #7 - 3979 Marine Way, Burnaby, BC, Canada V5J 5E3 (604)872-5757 (Pinballs, Jukes, Video Games) www.flippers.com "Old pinballers never die, they just flip out." |
| etpm@whidbey.com: Dec 04 09:15AM -0800 On Mon, 3 Dec 2018 23:21:10 -0500, Ralph Mowery >a year or so. >When memory chips first came out, it was said that the coverings of them >might emit an alpha partical and flip a bit. I figure it was a cosmic ray. Maybe my machine has a nuetrino detector in it! 1 detection in many years fits the bill. How many years I don't know but the machine has been around a long time. I could wrap the machine in lead to protect it but I don't have any two light years thick pieces. Eric |
| Fox's Mercantile <jdangus@att.net>: Dec 04 12:59PM -0600 > I figure it was a cosmic ray. When I was doing CNC repairs at Northrop Aircraft, I had an odd problem with a Pratt and Whitney Starturn lathe. They had these HUGE 3" x 18" helical wound resistors for the spindle braking. Because of the current, the winding wound bounce like a Slinky toy. Eventually breaking off the ceramic nubs on the form. So when they'd apply the spindle brake, the turns would short out and arc. Add that to the crap job the machine installer did with the grounding and you have a major problem. So, one night, the operator is most of the way through making a 6" diameter hydraulic coupling. The machine forgot to recenter a boring bar and went to rapid retract. Nice, but it pulled the part out of the chuck while it was turning at a high rate of speed. After making 5-6 full loops around the inside of the safety cover, if finally found the sweet spot, exploded the glass and took off past the operators head and through the wall behind him. On the other side of the wall, it found a 36" Blanchard grinder and hit the wheel, breaking it. The next thing to happen was a seriously off balanced grinder trying to hop across the shop until it ripped it's wiring apart. -- "I am a river to my people." Jeff-1.0 WA6FWi http:foxsmercantile.com |
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