H7263-AC 48v power supply for alphaserver 8400  - Page 1
Forum section: electronics / repair

author: P2Pextraction
author_rank: Contributor
timestamp: February 05, 2022, 04:21:57 am
content: Need help enabling main output

author: P2Pextraction
author_rank: Contributor
timestamp: February 05, 2022, 05:51:59 am
content: I wrote out a long post with a bunch of pictures hit post and it went thru the motions and i was dropped back into the main repair page with no post ever showing up. Then I did this post just as a sanity check and as soon as I was sure I still had my sanity I lost it realizing I spent a half hour writing out a very thorough post just to have it erased

author: m k
author_rank: Super Contributor
timestamp: February 05, 2022, 04:10:30 pm
content: Better write it offline first.The file has LEDs for earlier version.Shouldn't be much different.

author: P2Pextraction
author_rank: Contributor
timestamp: February 11, 2022, 12:32:00 pm
content: Yes I had found that document and my unit has the LEDs. The locking screws aren't "sensed" in any way and providing ac doesn't cause either light to come on but does start the low current 48v supply and the always on 5 volt supply. If to much current is drawn the lights do come on and signal non fatal error. I've deduced that the units intrinsicly know which slot they r installed in and I'm assuming they each have a unique features that the unit keys in on and how theses things usually work I'd guess it involves pulling one or more pics up to 5v or down to ground or maybe each slot has a different value resistor across a pair of pins and the unit uses that to determine which slot it's in. It might also require a signal from the system blower fan cause it has no internal fan. I've tried pulling all the pins down to ground one at a time and all but the 48v +&- pins to 5v individually but no joy. I've also scoped all pins for digital signal lik it's proported uart but there isn't any comms

author: m k
author_rank: Super Contributor
timestamp: February 11, 2022, 06:48:21 pm
content: ABB sticker says 1-phase and clearly that it must be.But many files I found stated 2 minimum and 3-phase input.Not sure though, only short descriptions from secondary manuals, like Manualslib where needed manuals were missing.There are many manuals though, maybe one model with installation or maintenance manual includes that unit.Some places are also indicating that it's also a HP product.

author: P2Pextraction
author_rank: Contributor
timestamp: February 11, 2022, 07:23:03 pm
content: Ya I've been able to located all the different manuals for the servers it's used for and have got done very useful information including the uart interface protocol specifics and commands but none talk about the supply in any detail. The deal with 1vs 3 phase is because each unit is single phase but there is a ac input circuit breaker interface that's powered with 3 phase and gives each slot it's own phase with it's own circuit breaker for redundancy. What's suppose to happen is when they have ac power but the master switch is off they should show green blinking light then the switch enables the main 48v rail. So I think it has two stages of enable and just I need to figure out both. Cause suppling it ac doesn't even get it into "standby" mode which I think Is y I don't see any digital comms. There manual references ccl (cabinet control logic) between the ccl module and the power units thru the DC distribution box without ever saying anything about what that encompasses. Also the list Nonfatal faults include:• Internal heatsink temperature warning• Power factor correction stage failed• Regulator/battery failed battery test• 48V to CCL module exceeds specified limits

author: TheMG
author_rank: Frequent Contributor
timestamp: February 11, 2022, 07:32:01 pm
content: Quote from: P2Pextraction on February 11, 2022, 07:23:03 pmThat is likely it. I actually have a 48V power supply that is set up that way (it's a completely different manufacturer for a totally different system, but is also a slot-in design with backplane connector). In my case it has both a "Enable" and a "Remote ON/OFF" pin. One has to be pulled low while the other has to be pulled high in order to get the power supply to output anything at all (beyond the 5V standby power).If you can't find any information on the pinout of the power supply connector you might need to do a bit of disassembly and reverse-engineering to figure out what does what.

author: P2Pextraction
author_rank: Contributor
timestamp: February 11, 2022, 07:50:10 pm
content: Every time I try to post more than one picture the post fails so this is them output connection bored and the red black jumper is the 48v auxiliary low current supply and I’ve tried them enabling that Opto isolator but that alone didn’t do anything also I should point out that there are tracks on the other side of the board but no a good way to fuck photo

author: P2Pextraction
author_rank: Contributor
timestamp: February 11, 2022, 08:03:58 pm
content: This forum interface on a phone browser is awful and painful to use am I not able to post pictures half the time usually with no warning sometimes just now the first time I got a Files to big message to appear even though it’s dropped a dozen post attempts and it was on one photo. I’ve posted single photos before and not had it say it’s too big so I don’t get it. is it just because I’m not an active user that I’m restricted so heavily how am I supposed to post Hi-Rez pictures with such a crazy low post allotment

author: m k
author_rank: Super Contributor
timestamp: February 12, 2022, 10:12:20 am
content: Somewhere was that you are not allowed to mix single and 3-phase powers.I'm quite sure somewhere was also 208V, 202V or both.Can there be select able delta/wye something?What kind of a console port it has?Somewhere was also that there are a Serial Control Bus but it's connected to everywhere and one part is Power System Controller(PSC).No idea if PSC is a same thing but it includes front end unit AC to 48VDC so it can be close.And "Call Digital Services" was the insight, nothing new, it was their bread.