Electronics Forum | Sat May 03 13:56:12 EDT 2014 | jyo_409
We are using TL431 in our most of the power supply circuits. Recently the power supply board is returning from the field due to TL431 component problem. Could you people, please suggest me what are the possible reasons for TL431 failure & trouble sho
Electronics Forum | Tue Jun 10 21:15:01 EDT 2014 | comatose
We had a similar problem once, it was due to insufficient v-score depth. While waiting for remade PCBs we would run an exacto knife along the score lines prior to depanel to cut a little deeper. Not ideal for sure, and not fast, but it worked.
Electronics Forum | Thu Jun 12 13:36:32 EDT 2014 | clydestrum
Deepening the V-scores was in vain. No change. This board is on Rev R now, with no changes to material/array/v-score spec, and this is the first we've seen this problem. I just don't get it.
Electronics Forum | Tue Jun 03 10:30:36 EDT 2014 | cbeneat
We have the same ovens, our 2 sided boards have the same profile for both sides. Haven't seen a problem in 8 years.
Electronics Forum | Wed Jun 18 02:43:37 EDT 2014 | tjbooc
CHECK IO BOARDS STATUS, CHECK HEAD IO 24VDC SUPPLY, CHECK 24VDC SUPPLY TERMINAL, CHECK WIRING CONNECTED TO HEAD IO I think this is an I/O communication problem. Fail in connecting to I/O cards.
Electronics Forum | Wed Jun 18 09:42:17 EDT 2014 | charliedci
We have an older Checksum with intermittent bootup problems. Factory does not support, looking for someone with knowledge or might know someone who supports these older systems. Thanks
Electronics Forum | Thu Jul 03 06:08:16 EDT 2014 | oxygensmd
@JimmyB You have right, I'm not from Chicago - I didn't go to overseas yet. @All Thanks guys for your help but I haven't the right password. I think I need to remove and reinstall the OIS. That's the only one solution to solve my problem.
Electronics Forum | Mon Jun 30 15:47:46 EDT 2014 | AK
Thank you SteveO, I have also tried reflow 2nd time without any problem, but I also do not know the impact of long term reliability as our devices are most likely operated in the harsh environment. We are currently do soldering in Argon environment.
Electronics Forum | Tue Jul 15 08:45:29 EDT 2014 | jeltez42
I am seeing a similar problem. We are using Orbotech AOI. I am trying to find a way to make the light source brighter.
Electronics Forum | Fri Jul 18 16:04:31 EDT 2014 | comatose
We had this. The anti-backlash nuts were binding. We took them apart, chased the threads with a tap and re-assembled with slightly less pre-load. Hasn't been a problem since.
