Thread Tools
Jan 16, 2014, 08:26 AM
Registered User
Need some help...
Can anyone tell me pinout for IBM 39Y7408 server power supply, and how this PSU do fan control?
I powered those fans directly to +5V/+12V because PSU didn't power em up. Without fans PSU heat up and power off eventually.
Thanks.

http://www.ebay.com/itm/IBM-39Y7408-...item1e7f3ebfe6
Sign up now
to remove ads between posts
Jan 16, 2014, 10:11 AM
Registered User
i have ask the same thing back about a 1 year ago here on this thread look back i hope you figure something out shady grady
Jan 16, 2014, 12:27 PM
Registered User
Quote:
Originally Posted by jj604
Congratulations - that is some beast.

Be sure to put a link to your post here over on the reference sticky thread

https://www.rcgroups.com/forums/show....php?t=1292514

That way people can find yet another solution.

BTW I think I need to clarify the need for stacking two supplies - at least for those of us who use them to drive LiPo chargers.

It is not the current limitation of the Power Supply that is the problem but the Charger input limitations.

Most large chargers cannot deliver their full power if only fed from 12V. They commonly need 18-30 V input voltage to reach their stated power. This is a charger input current limitation. The switch mode convertors in these chargers have an input current limit and at 12V input that cuts in before the total power limit.

Doesn't apply of course for people using these as 12V supplies for other purposes like feeding auto amplifier circuits, HAM rigs and the like.

John
I will look into voltage output adjustment possibilities, maybe some better shots of the components will reveal a simple vrm model. For my application I want the voltage to be as stable as possible and close to ATX 12V as possible.
Jan 16, 2014, 12:36 PM
Registered User

Liteon ps-2142-1d1 psu


Has anyone knowledge on the pinout of this PSU?

I attach some relevant photos.

Thank you very much, from Simon in Italy.
Jan 16, 2014, 03:12 PM
Registered User
Quote:
Originally Posted by iz7atn
Has anyone knowledge on the pinout of this PSU?

I attach some relevant photos.

Thank you very much, from Simon in Italy.
You can probably find it yourself with trial and error, there is a thread that shows how to do this with a multimeter, paper, pencil and some time.
Jan 17, 2014, 07:48 AM
Im from Poland, not Holland!!!
Where is this thread?
I see only tips by xandrios in this thread.
Jan 17, 2014, 06:51 PM
Registered User
IBM 39Y7408 server power supply

top power connector 220V middle is earth...

bottom connector from left to right is
+ + + - - - 20 pins - - - + + +
top left pin of those 20 pins on this PSU connect to ground and PSU will turn on and give 12V.

On my PSU fans wouldn't start, PSU will heat up and eventually power off. So I power up those 3 fans directly with 5V from other PSU, or with 12V with its on power but sound is high on 12V.
Jan 17, 2014, 09:32 PM
Registered User
Quote:
Originally Posted by Doctore
Where is this thread?
I see only tips by xandrios in this thread.
https://www.rcgroups.com/forums/show...&postcount=570

This helped me quite a bit. I also used a 0.5A 12V case fan's wires to test the terminals instead of just shorting them or using a 1kohm resistor. An actual 5V output will be able to push a fan, a 5v standby usually wont. In my case, I had to send 5V to the plug sensor pin, and bring the 5vsb sensor signal to ground, a bit different than the dells.
Last edited by tg989; Jan 18, 2014 at 02:39 PM.
Jan 18, 2014, 02:40 PM
Registered User
Quote:
Originally Posted by grunf16
IBM 39Y7408 server power supply

top power connector 220V middle is earth...

bottom connector from left to right is
+ + + - - - 20 pins - - - + + +
top left pin of those 20 pins on this PSU connect to ground and PSU will turn on and give 12V.

On my PSU fans wouldn't start, PSU will heat up and eventually power off. So I power up those 3 fans directly with 5V from other PSU, or with 12V with its on power but sound is high on 12V.

Nice, 2900W. There is likely a voltage-controlled fan pin on the remaining pins that is expecting 0-X volts in order to control the fans, you can probably take your 5V output and run it across some of the remaining pins and see if the fans kick on.
Jan 19, 2014, 08:17 AM
Registered User
Quote:
Originally Posted by Baki1
I need help to turn on PSU labeled HP 0957-2198. Producer: C&D Technologies, Model: RH1448Y.
This PSU is used in HP Integrity rx3600 and rx6600 servers. If you google enough then you will find that some of these come up with Murata Power Solutions PSU, too.

That leads us to this datasheet http://www.murata-ps.com/data/acdcsu...-w-1600-hx.pdf

which nicely show pinout and other parameters. Pinout attached.


Unfortunately I have a problem with it. If I turn it on (PS_ON and PS_KILL both connected to V_SB_Return) then 12V appears on main outputs for a second, then goes down to 3V, back to 12V and again to 3V and so on.

Output voltage is simply not stable. What could be the reason? According to datasheet it should provide stable 12V even without load (tried with 10 Ohm load, too - no difference). Wasn't able to read I2C data (don't have interface yet) to see what is happening.

Any ideas?

Edit: Ok, turns out that if I disconnect fan2 (the one on the side of the box) then PSU delivers 12V nicely. If I reconnect fan output goes immediately to 3-4V and PSU signals overtemperature condition over I2C (which is not true obviously). Fan itself is fine. Something that drives it is likely broken but don't know what.
Last edited by arekm; Jan 26, 2014 at 01:25 PM.
Jan 21, 2014, 10:18 AM
Registered User
Does anyone know what backplane connector the HP DL580/ML570G3 uses? I would like to purchase some of them off digikey in order to allow for less permanent uses (or in case it goes bad).

I know digikey sells some for other PSUs, such as the Dell Poweredge 1950 PSU.

http://www.digikey.com/product-searc...s=G20F203000HR
Jan 21, 2014, 02:59 PM
Registered User
dell ds850 power supply has a foldback / hiccup problem when i try to transmitt it kicks out will not let you pull much amps 40 kicks it out an its rated for 70 ?????????
Jan 21, 2014, 02:59 PM
Registered User
Can anyone here tell me what has to be done to using two of these HP 403781-001 DL380 G5 1000W units, to get a 1000 watt (40+ amps) 24VDC output for use with a PowerLab PL8 charger?

Thank you!
Last edited by itsme2; Jan 21, 2014 at 04:05 PM.
Jan 21, 2014, 05:11 PM
Registered User
Quote:
Originally Posted by itsme2
Can anyone here tell me what has to be done to using two of these HP 403781-001 DL380 G5 1000W units, to get a 1000 watt (40+ amps) 24VDC output for use with a PowerLab PL8 charger?

Thank you!
See here: https://www.rcgroups.com/forums/show...9&postcount=20

Cheers
Whitedg
Jan 22, 2014, 10:38 AM
Registered User

Hp DPS 600B?


Are two HP DPS 600PB units in series capable of outputting 60 amps total @ 24VDC, if so what would the 125VAC input current draw be? I would be using these on a 20 amp breaker circuit.

Thank you!


Quick Reply
Message:

Thread Tools

Similar Threads
Category Thread Thread Starter Forum Replies Last Post
Where to Get A Quality Power Supply? Joe Elston Batteries and Chargers 5 Dec 20, 2019 07:38 PM
12volt wallwart power supply reading 14.6 ? (help) power Batteries and Chargers 9 Sep 24, 2017 12:22 PM
Need advice on high grade power supply for ISL-8 Byron Betterly Batteries and Chargers 7 Dec 07, 2003 09:31 PM
12volt, 9amp power supply for sale Paul Susbauer Aircraft - Electric - Airplanes (FS/W) 1 Dec 03, 2003 01:44 PM
High end charger and power supply for sale! Very new. ted616 Aircraft - Electric - Airplanes (FS/W) 6 Dec 03, 2002 12:31 AM