Derp20140216_221314.jpg

I can post the pictures directly to this post a little later. Here is a blog post where I replace a PIA chip on a system11 mpu.

http://www.dkpinball.com/DKWP/?p=47

I like to think this is an example of good board work.

Not exactly what you asked for, but here's a great resource for best practices in board repair. Great reading for anyone who repairs boards or wants to elevate their board repair skills (or can't get to sleep).

The standard for board repair is the IPC (Institute for Printed Circuits). Unfortunately their standards documents cost several thousand dollars. Circuit Medic, one of the premier boards repair shops (non-pinball), has some great info on best practices based on the IPC standards.

http://www.circuitmedic.com/guides/guides.shtml

There's also a PDF version of this guide on my website.

http://pinballrehab.com/1-articles/solid-state-repair/board-rework-test/242-board-rework-standards

I won't copy all of the photos to the forum, but here's a couple of articles on my site with board repair tips.

http://pinballrehab.com/1-articles/solid-state-repair/board-rework-test/246-pad-and-trace-repair

http://pinballrehab.com/1-articles/solid-state-repair/board-rework-test/230-repairing-plated-through-holes

026.JPG966490_609672255709879_1081968072_o.jpgWell here are a few of my boards Ive done, granted not 100% direct replacements but i like to upgrade the boards if possible using new regulators etc eliminate alot of heat etc.031.JPG018.JPG014 (2).JPG015 (2).JPGhyperball 005 (3).JPGhyperball 010 (3).JPG965139_616749598335478_1189957664_o.jpg

Kris @ firebird pinball does excellent work. Hope he can chime in.

Yes, Kris is very good at what he does. Has helped me out a few times with repairs in general and some board issues. He is so frantically fast when he works sometimes I wonder if he is on crack.

Terryb is correct. I have worked for over 30 years in the electronics industry. The last 15 in professional audio products. The bible for soldering is the IPC. Here is a sample document that gives you and idea of what is acceptable and what is not acceptable for through hole components
http://www.ipctraining.org/demos/pdf/drm-pth-e.pdf

An 5V HRD step down converter.

Nice document wayout440. Thanks for posting that.

Your welcome.

Good thread idea, Shimoda.

The 2.2 ohm resistor needs to be removed, but basicly wanted to do an upgrade the lm323 still generates enough heat, and the bulky heatsink added alot of weight to the board so when moving the machine around the board flexes board flex creats broken solders the more modern step down converts also provide alot less strain on the old power supply and transformer also the voltage is more stable holds at 5.0v constant. handles 3A RMS and up to 5A surge a better rating than the lm323. looks a bit funny but an upgrade for about the same price.
no reason not to integrate new better technologies to the old boards when possible.
If you look at the williams sound board them are the new converters i use now

Great document, but why, oh why, did they use that font. I HATE THAT FONT /ocd

Not much to see, but I recently replaced every scanbe socketed IC chip on this Williams System 3 board.
Then replaced all the Capacitors on the power board along with most of the male pins on the outer edge and the 5 volt regulator.
Thanks to the Hako 808 I got on the group buy here on the boards, it was all relatively painless.

IMG_0764.JPG
IMG_0765.JPG

"bang it with the 808" makes repair work a breeze!

Well. I guess this is a better option than mangling the through holes. I can fix this...

dsc02847po.jpg

Good Lord. Lock the backbox.

Wow thats ugly. And why would you do that its twice the work. And I like the ic socket with the extra legs cut off.