Electronics Forum | Fri Apr 03 19:04:02 EST 1998 | Steve Gregory
Hi Jacqueline! The dreaded white residue huh? YUCK! This seems to be a ongoing issue...probably because there are many different things that can possibly cause this. There's a real good article about the different causes of this problem at Kest
Electronics Forum | Tue Feb 24 12:37:43 EST 1998 | Robert
| We are facing some placement problems with | our QUAD 4-C. | Program was running fine last week, Next week | program will be off (placement, pickup,vision files | etc, | Any help, any idea,??? | Thanks Sorry your having trouble, I also have a IVc t
Electronics Forum | Sat Feb 28 01:14:29 EST 1998 | Ray
| | We are facing some placement problems with | | our QUAD 4-C. | | Program was running fine last week, Next week | | program will be off (placement, pickup,vision files | | etc, | | Any help, any idea,??? | | Thanks Glass scales ARE the problem. Th
Electronics Forum | Fri Feb 20 14:33:47 EST 1998 | Dave McFadyen
Looks like (so far) we have a concensus. Follow the paste manufacturers guidelines on storage. Normally, refrigeration is required to achieve max shelf life between 3 and 6 months in original closed container. Water-wash pastes are much more active t
Electronics Forum | Tue Aug 07 08:20:47 EDT 2001 | CPI
Are there other components on the board? If so, how does solder quality look on them? Are they all reflowing? Are the sections of the uBGA�s sitting on a ground plane? Sounds like un-even heating. You should attach a couple thermal couples and see h
Electronics Forum | Tue Aug 07 19:45:03 EDT 2001 | dougk
Here�s a nagging problem. We have several machines with old DOS-based interfaces (MPM printers, Electrovert ovens/waves, etc.). After some time, the monitors slowly fade-out due to over use (no screen blankers). We end-up ordering several new monitor
Electronics Forum | Mon Aug 13 22:30:16 EDT 2001 | davef
When I was a kid, I used to go down to Mel's Gas Station on Dalton Avenue and get busted carborators and things like that from Mel. I'd take them home and take them apart. One time I was field stripping a carb, trying to remove a screw, but it was
Electronics Forum | Thu Aug 30 14:14:27 EDT 2001 | dougt
James Take a board with double sided tape and run it with all the other parts "shorted". Make sure that the part is being placed by the head/spindle that will be used during a full run. Inspect the part after it is placed and carefully remove it a
Electronics Forum | Thu Sep 27 10:28:29 EDT 2001 | John S
It seems to depend on your situation. We're an OEM manufacturer and run the same products for extended periods of time. We monitor process indicators such as Dave listed, but we also monitor process defect trends. This is product specific of cours
Electronics Forum | Wed Oct 10 13:49:12 EDT 2001 | stepheno
I recently started at a new company. They have a variety of bare PCB's and most have aprox. 20 variations. Maybe about 1/3 of each board on average are non-populated locations. They buy one stencil for each PCB but then use scotch tape to block of
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