Electronics Forum | Tue Aug 17 18:54:02 EDT 2010 | rob_thomas
Latest and greatest after discussing w colleagues w experience in commercial electronics. According to the 'Printed Circuits Handbook' by Clyde F Coombs JR, the number of "SMT solder rework cycles per component per board is kept to two-three. Beyond
Electronics Forum | Fri Aug 20 09:40:56 EDT 2010 | namruht
kpm, We were afraid of that, so we have tried several variations with paste usage. New paste, transfered paste from another line, and a new tube from another date code. I think the problem is profile, board design or humidity. I just have to starti
Electronics Forum | Sat Aug 21 02:08:00 EDT 2010 | isd_jwendell
I have noticed that the % metal content in the paste can also be directly correlated to solder balls (less metal, more balls). However, I also found differences between pastes from different manufacturers and the number of solder balls (identical boa
Electronics Forum | Sat Aug 21 15:07:34 EDT 2010 | jry74
I have a problem with solder bridging between IC leads, especially fine pitch leads. If we lessen the apature ratio and/or decrease stencil thickness, I have more of a chance for unsoldered or insufficent joints. I am looking for any information th
Electronics Forum | Wed Aug 25 12:13:40 EDT 2010 | remullis
You may want to search on "Cover Tape", what date code is on the parts reel? I have multiple issues with cover tape sticking to the paper and not peeling back. Causes pick errors due to the part being covered. I think my problem is the parts have too
Electronics Forum | Thu Sep 02 04:59:17 EDT 2010 | sachu_70
Feeder calibration helps to center the window opening used during component pick-up by a machine nozzle. Once this is established, the next step would be to confirm the centering of Machine nozzle to the center of this feeder window during machine op
Electronics Forum | Thu Sep 02 19:22:08 EDT 2010 | fulldrawmike
seen it on a uni-mod many times. there is a muffler near that assy that if dirty will cause the air dump to back up and not exit out the muffler. if yours has one, remove it and see if it stops the table latch. it will be loud but it will let you k
Electronics Forum | Fri Sep 17 16:44:56 EDT 2010 | rdubya
If your pads are long enough you shouldn't have a problem, the pins on the connector are curved up(away from pcb)and will plow solder paste to the end of the pad then it will wick back up the pin during reflow. if you have a second stencil for the bo
Electronics Forum | Mon Sep 20 00:51:03 EDT 2010 | jeffr
This particular Yamaha Head I/O Board is a common failure. Yamaha supply an updated version which is less likely to fail. The cause of the problem that you see is due to the connectors on the flexing and damaging the inner layers of the board. The on
Electronics Forum | Mon Sep 20 14:23:50 EDT 2010 | dekhead
No, there is not a way to initialise into the diagnostics menu with the head raised / covers open. Literally lowering the head manually (prop head, disconnect actuator, etc) is naturally possible, but not receommended... and based upon your symptom
