Film-Tech Forum ARCHIVE: Replacing DTS-XD10 power supply

This is topic Replacing DTS-XD10 power supply in forum Film Handlers' Forum at Film-Tech Forum ARCHIVE.

To visit this topic, use this URL:
https://ft-forum.com/ft/cgi-bin/ubb/ultimatebb.cgi?ubb=get_topic;f=1;t=012295

Posted by Christopher Woollard (Member # 2455) on 04-09-2018, 07:06 AM:

The power supply module inside my XD10 has failed. This is a fully enclosed power supply unit (not the same as a later XD10P) and I have no circuit diagram, but seems very similar to a PC power supply though with lots of output power circuits.
Here in the UK it worked fine until today. Measures zero volts although a small green light on the mother board does flash but is very dim on switch on.
Has anyone successfully replaced one of these?
p.s. the motherboard caps look fine. Really need a working unit for 70mm
Any advise welcome.

Posted by Ken Lackner (Member # 1002) on 04-09-2018, 08:22 AM:

It's been a while since I've touched one of those, but it should be a standard ATX computer power supply. Someone please correct me if I'm wrong.

Posted by Gordon McLeod (Member # 33) on 04-09-2018, 08:25 AM:

The xd10p uses the same powersupply as the USL JSD80

Posted by Kieran Hall (Member # 10268) on 04-09-2018, 08:27 AM:

Yes, the XD10 just uses a standard PC power supply with T-Tap connectors spliced into the green power-on and black ground wires of the ATX connector.

The only slight caveat is if you have one of the older Pentium III-era units with the AOpen motherboard, the CPU will draw most of its power from the 5V rail. Almost all new PSUs will be designed for newer CPUs that draw 12V and so will put most of its rated power out as 12V, so you'll need to check this.

Was the PSU connected to the motherboard when you measured the 0v? When ours showed similar behaviour with the brief flash, the PSU would turn on with no load. It turned out that the motherboard was shorting and making the PSU shut itself off, so we ended up having to replace it.

Posted by Carsten Kurz (Member # 5396) on 04-09-2018, 08:32 AM:

The product names are a bit confusing - while the XD10 is a DTS PLAYER, the XD10P is a cinema sound processor (an OEM USL JSD80).
The XD10, as the DTS-6/6D, etc is based on PC hardware, so a more or less standard PC power supply would be obvious.
Not so for the XD10P.

- Carsten

Posted by Christopher Woollard (Member # 2455) on 04-09-2018, 08:39 AM:

The motherboard was connected when I measured. It certainly looks like a standard old PC power supply which is cheap to replace. When I fully dismantle I will investigate shorted caps on the motherboard. If the motherboard is completely gone the unit will not be repairable but just caps are easy. Thank you.

Posted by Kieran Hall (Member # 10268) on 04-09-2018, 09:15 AM:

You may be able to replace the motherboard with an off-the-shelf one if need be.

We've done a fair bit of looking into this so I should probably write up and post details about what we've found will work at some point. We've just bought a Gigabyte GA-945GCMX-S2 to resurrect our spare unit and it seems to be working well -- we just have the power piggy-back board to connect up.

Posted by Mark Gulbrandsen (Member # 72) on 04-09-2018, 12:06 PM:

quote: Christopher Woollard
the motherboard caps look fine.

Hopefuly they are... I can't tell you how many XD-10 motherboards I have recapped, well over 50 of them. The earlier board caps all fail... I used to do them right in the booth.

Mark

Posted by Christopher Woollard (Member # 2455) on 04-09-2018, 12:11 PM:

Sounds like the caps should be replaced anyway, the unit is from 2006. That means removing the motherboard desoldering and replacing, cap value should then be visible as I have no circuit diagram. What are the supect caps?

Posted by Harold Hallikainen (Member # 5405) on 04-09-2018, 02:26 PM:

Are these ceramic or electrolytic capacitors? I believe electrolytics have a definite life span, but ceramics SHOULD last forever. I have seen cases, however, where there was a bad run of ceramics. These all failed pretty quickly.

I'd be tempted to see if this works with a new power supply. If so, perhaps replace old electrolytics, but leave the ceramics. Have others found ceramics "age out?"

Harold

Posted by Carsten Kurz (Member # 5396) on 04-09-2018, 04:33 PM:

https://en.wikipedia.org/wiki/Capacitor_plague

It's rather typical so see many electrolytic caps fail on mainboards, switching supplies, etc. manufactured in that period.

- Carsten

Posted by Mark Gulbrandsen (Member # 72) on 04-11-2018, 11:25 AM:

The A-Open motherboards were the MOST troublesome and I posted many pictures on a thread here a number of years ago of re-capping those boards. i can not find that thred now... ALL of the A-Open boards will eventually fail and the caps will have leakage or be swolen. The later motherboard version was a bit more reliable, but I have had those capacitors also fail. The A-Open suffers from Capacitor Plague, and the later board may suffer to some extent. Yes, they are all alumnium electrolytics. Almost every major manufacturer has had issues with capacitor plague.
Capacitoritus

quote: Carsten Kurz
It's rather typical so see many electrolytic caps fail on mainboards, switching supplies, etc. manufactured in that period.

Its still happening today Carsten! Dolbly CP-750 supplies are dropping like flies... So do certain CP-650 supplies. If a manufacturer buys inferior capacitors, or his supplier has shipped them unknowingly to him then it's highly likely to happen sooner than later.

Mark

Posted by Carsten Kurz (Member # 5396) on 04-11-2018, 11:30 AM:

I think the CP750 do mostly not fail on caps, but a varistor protection device early on after the mains entry.

- Carsten

Posted by Christopher Woollard (Member # 2455) on 05-03-2018, 11:20 AM:

Processor all fixed. A blown power supply, recycled one from an old PC.

Posted by Florian Kuik (Member # 9322) on 06-07-2018, 05:41 AM:

The later models use a small circuit instead of the short wire on the power suplly. It is replaceable with a ATX power suply. The DELTA supllys on dell servers will do very good.

We've developed also a replacement kit for the mainboard, my machine now uses a SATA SSD and a recent and stable mainboard. S775 c2d instead of the old P3. Newer is not possible, due to the m-atc pci requirements.