Electronics Forum | Tue Dec 22 23:57:21 EST 2020 | ttheis
Ok; is this the 5a box located under and behind the pdp? I see now in the diagram it is labeled pdp1.ps1. Any suggestion for what to check to determine if the problem is the power supply or something connected to it? I noticed that when the 12v po
Electronics Forum | Wed Dec 23 12:57:59 EST 2020 | ilavu
Check Power Distribution Panel Power Supply. No output or output too low for 24V, 15V, and 12V. Also, LED's on PDP LT6, LT7, LT8 , LT9, LT10, LT11 don't turn on at all, even though all fuses test OK for continuity.
Electronics Forum | Fri Jan 29 18:47:35 EST 2021 | ilavu
The error in the attached picture(FCFF1043) is for 16 I/O card located in CIO slot one for board transfer. May be thats when your PDP supply drop voltage. If problem comes back, look at that card and/or connection and/or cable.
Electronics Forum | Fri Jan 29 22:26:09 EST 2021 | ttheis
Thanks for the heads up. I suspect it is due to power dropping out to the IO chassis and other devices connected to the pdp. This is the first logicomm capture I have for it so I don't have other messages to compare it to. Machine has been running al
Electronics Forum | Fri Feb 26 02:41:10 EST 2021 | ttheis
We have been running the machine for about a month after replacing the pdp power supply. We have not had a repeat of the problems since. I believe we can consider this issue resolved. Failing pdp supply was a known issue in the uic kb.
Electronics Forum | Wed Aug 10 12:22:09 EDT 2005 | jh0n!
Configuration>Parameters>Board Handling "Board stop mounted" was incorrectly checked. Mods, feel free to delete.
Electronics Forum | Fri Sep 27 15:14:04 EDT 2019 | dilogic
Just one more thought - we had an issue with +12V supply for VME rack. One tantalum cap in the DC/DC converter module for linear encoder interpolator shorted it out, but oddly enough - not always. We ended up hooking scope to all PSU voltages and whe
Electronics Forum | Wed Nov 27 08:54:03 EST 2019 | ttheis
Hi Tushar, Thanks for the reply. I do believe I put it into debug mode but I will be sure to check next time I try logicomm. I am not using any RAMTF or PTF. At the moment I have upgraded the machine from EPC-5 to EPC-5-66 which I found cheap. The
Electronics Forum | Fri Jan 29 13:25:43 EST 2021 | ttheis
Update: I have replaced both dc-dc converters without any improvement. Observing the issue again yesterday I was able to see more of the problem. Logicomm reported a bus error at fcff1043 running "butt" (photo attached.) The DC power ligh
Electronics Forum | Fri Apr 05 18:33:31 EDT 2019 | ttheis
I am also interested in this but to slow one of our machines down- it stops too quickly and shakes the machine more than I would like. We are running GSM1's on OS/2 and uic sw 3.3.
