Author Topic: Compaq T2400H UPS service manual  (Read 471 times)

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Offline IanJ

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Compaq T2400H UPS service manual
« on: December 10, 2019, 08:15:16 pm »
Hi all,

Got a dead Compaq T2400H UPS I'd like to get up & running, has anyone got a service manual and/or schematic diagram for it.......or indeed another in a similar series?

Thanks,

Ian.
Ian Johnston
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Manufacturer of the PDVS2 & PDVS2mini
 

Offline TheMG

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Re: Compaq T2400H UPS service manual
« Reply #1 on: December 11, 2019, 02:29:00 am »
First things first... are the batteries in it any good? There are many UPS models that will not power up and act completely dead if the batteries can't at least supply enough power to get the UPS circuitry powered up. This occurs even if the UPS is plugged in to an AC source, it needs power from the batteries to initialize the UPS and energize the relay allowing AC mains to the UPS.
« Last Edit: December 11, 2019, 02:30:57 am by TheMG »
 

Offline IanJ

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Re: Compaq T2400H UPS service manual
« Reply #2 on: December 11, 2019, 08:28:05 am »
Batteries were dead/flat but I had changed them for known good ones.

I would reverse engineer the power circuit but theres quite a lot of hardware covering a lot of the main pcb it would be easier with a schematic.

Cant see anything on the web........but I live in hope somebody has something.

Ian.
Ian Johnston
www.ianjohnston.com
Manufacturer of the PDVS2 & PDVS2mini
 

Offline Electro Detective

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Re: Compaq T2400H UPS service manual
« Reply #3 on: December 11, 2019, 10:24:47 am »

What's it doing/not doing? 

assuming you did pump a healthy 48 volts (52+ in reality) of series battery oomph to get it motivated?

 

Offline TheMG

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Re: Compaq T2400H UPS service manual
« Reply #4 on: December 12, 2019, 01:48:06 am »
If you've got good battery voltage and the fuses are ok but the unit still acts completely dead (no beeps, clicks, no LEDs), I would suspect maybe a voltage regulator. There should be somewhere on the board a voltage regulator providing power to the main micro-controller. In a UPS that age it would most likely be a linear regulator, probably a 7805 or equivalent. Have a look around the board and measure input and output voltages on any regulator you can find.

No need to reverse-engineer the whole circuit at this point. "Thou shall check voltages".

Are you able to post a good picture(s) of the circuit board?
« Last Edit: December 12, 2019, 01:49:37 am by TheMG »
 

Offline IanJ

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Re: Compaq T2400H UPS service manual
« Reply #5 on: December 12, 2019, 07:10:08 am »
Hi all,

Apologies if I have mis-communicated, and as much as I appreciate the hints n tips, I was really just after the schematic so I can effect a repair on my own YT channel.
Theres no other type of video I like better creating than repair videos.

Cheers,

Ian.
Ian Johnston
www.ianjohnston.com
Manufacturer of the PDVS2 & PDVS2mini
 

Offline TheMG

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Re: Compaq T2400H UPS service manual
« Reply #6 on: December 13, 2019, 01:06:30 am »
Unfortunately I have nothing to offer in terms of schematics. I know from doing a LOT of research and asking around in the past, with small UPS from various manufacturers, that this documentation is most often not available outside of the manufacturer, unless it happens to have been leaked or reverse engineered, which is rare as there are so many different models out there and most people throw them away rather than seek to have them repaired outside of warranty. Sad, but that's the way more and more things are going these days. :(
 

Offline Electro Detective

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Re: Compaq T2400H UPS service manual
« Reply #7 on: December 16, 2019, 01:28:09 am »

IIRC this model and the APC badged version of it at the time, 'may' have been the same units internally

APC may have some docs kicking around for theirs,
highly doubt you'll find much if anything on the Compaq unit = been there a while back ::)
and luckily ?! it was faulty batteries that checked ok  ??? coupled with dodgy connections and client's dodgy+ power strip  :palm:
and a blanket of dust and crust.

Does the 'patient' resemble the 'borrowed picture' below?

Good luck with the video  :-+  put me down for a looksee

 


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