We have a rather odd specialist desktop PC that got a knackered power
unit. This wouldn't normally be a problem but on this series of units
they had a slightly lower in height power unit.

Where most all of them are 140 mm high and 85 mm wide and around 150 mm
deep (front to back) this one is 120 mm high! (85 x 120 x 150).
A standard one will stick out of the top of the case which isn't
required;!. Anyone know what they are called and know of anywhere in the
UK you can obtain one from they have the normal fixings and IEC input
and output lads just need this reduced height!..

cheers..
--
Tony Sayer

Hi Tony

probably best to search (on eBay etc.) based on the make/model of the
PC, I'd have thought, eg. 'Fujitsu Scenic S2' (one desktop machine I
know with an unusual PSU).

J^n

On Mar 25, 8:09*pm, tony sayer wrote:
We have a rather odd specialist desktop PC that got a knackered power
unit. This wouldn't normally be a problem but on this series of units
they had a slightly lower in height power unit.

Where most all of them are 140 mm high and 85 mm wide and around *150 mm
deep (front to back) this one is 120 mm high! (85 x 120 x 150).
A standard one will stick out of the top of the case which isn't
required;!. Anyone know what they are called and know of anywhere in the
UK you can obtain one from they have the normal fixings and IEC input
and output lads just need this reduced height!..

cheers..

One possible answer is: angle grinder. I've seen plenty of PC PSUs
where the innards don't occupy the full height of the box. Take care
to avoid any metal filings, eg by decasing the pcb and reinstalling
once cut. As many cases are made as 2 Us, it will very much affect the
case reassembly, but it can all be patched up with duct tape.


NT

On 25/03/2011 20:45, Tabby wrote:


One possible answer is: angle grinder. I've seen plenty of PC PSUs
where the innards don't occupy the full height of the box. Take care
to avoid any metal filings, eg by decasing the pcb and reinstalling
once cut. As many cases are made as 2 Us, it will very much affect the
case reassembly, but it can all be patched up with duct tape.


NT

Along those lines, wouldn't it be easier to simply transplant the pcb?

Lee

On Fri, 25 Mar 2011 20:09:26 +0000, tony sayer wrote:

We have a rather odd specialist desktop PC that got a knackered power
unit. This wouldn't normally be a problem but on this series of units
they had a slightly lower in height power unit.

Where most all of them are 140 mm high and 85 mm wide and around 150 mm
deep (front to back) this one is 120 mm high! (85 x 120 x 150). A
standard one will stick out of the top of the case which isn't
required;!. Anyone know what they are called and know of anywhere in the
UK you can obtain one from they have the normal fixings and IEC input
and output lads just need this reduced height!..

Probably one of the five variants of SFX/SFX12V PSUs; if not, one of
those will fit although you might need to drill one or two new fixing
holes at different centres.

How easy they are to come by...I haven't looked.

What wattage?



--
Use the BIG mirror service in the UK:
http://www.mirrorservice.org

*lightning protection* - a w_tom conductor

On Mar 25, 9:07*pm, Lee wrote:
On 25/03/2011 20:45, Tabby wrote:



One possible answer is: angle grinder. I've seen plenty of PC PSUs
where the innards don't occupy the full height of the box. Take care
to avoid any metal filings, eg by decasing the pcb and reinstalling
once cut. As many cases are made as 2 Us, it will very much affect the
case reassembly, but it can all be patched up with duct tape.

NT

Along those lines, wouldn't it be easier to simply transplant the pcb?

Lee

Maybe, the only issue is the mounting points probably wont match. It
would ease fan mounting.


NT

On 25/03/2011 20:09, tony sayer wrote:

We have a rather odd specialist desktop PC that got a knackered power
unit. This wouldn't normally be a problem but on this series of units
they had a slightly lower in height power unit.

Where most all of them are 140 mm high and 85 mm wide and around 150 mm
deep (front to back) this one is 120 mm high! (85 x 120 x 150).
A standard one will stick out of the top of the case which isn't
required;!. Anyone know what they are called and know of anywhere in the
UK you can obtain one from they have the normal fixings and IEC input
and output lads just need this reduced height!..

cheers..

Dell boxes can be like that.
You seem rather coy on naming the actual make/model!

Go on google / fleabay with the make/model, and you will usually find a
replacement.

--
Ron

Why don't you try plugging the Model Number into your search engine's Search
Box?

I need a power supply for a Princeton monitor that I own. The model number
of the power supply is HASU05F. Plugging that into the Search Box of Yahoo!
gave me a host of hits, some on eBay. The supply I need can be bought for
$10.25, shipping included.




"tony sayer" wrote in message
...

We have a rather odd specialist desktop PC that got a knackered power
unit. This wouldn't normally be a problem but on this series of units
they had a slightly lower in height power unit.

Where most all of them are 140 mm high and 85 mm wide and around 150 mm
deep (front to back) this one is 120 mm high! (85 x 120 x 150).
A standard one will stick out of the top of the case which isn't
required;!. Anyone know what they are called and know of anywhere in the
UK you can obtain one from they have the normal fixings and IEC input
and output lads just need this reduced height!..

cheers..
--
Tony Sayer

In article , Ron Lowe
scribeth thus
On 25/03/2011 20:09, tony sayer wrote:

We have a rather odd specialist desktop PC that got a knackered power
unit. This wouldn't normally be a problem but on this series of units
they had a slightly lower in height power unit.

Where most all of them are 140 mm high and 85 mm wide and around 150 mm
deep (front to back) this one is 120 mm high! (85 x 120 x 150).
A standard one will stick out of the top of the case which isn't
required;!. Anyone know what they are called and know of anywhere in the
UK you can obtain one from they have the normal fixings and IEC input
and output lads just need this reduced height!..

cheers..

Dell boxes can be like that.
You seem rather coy on naming the actual make/model!

Yes well, there simply isn't one this was made up out of component parts
a while ago now even the power unit hasn't got anything recognisable on
it!..


Go on google / fleabay with the make/model, and you will usually find a
replacement.


Bin there haven't found one!..
--
Tony Sayer

In article
s.com, Tabby scribeth thus
On Mar 25, 8:09*pm, tony sayer wrote:
We have a rather odd specialist desktop PC that got a knackered power
unit. This wouldn't normally be a problem but on this series of units
they had a slightly lower in height power unit.

Where most all of them are 140 mm high and 85 mm wide and around *150 mm
deep (front to back) this one is 120 mm high! (85 x 120 x 150).
A standard one will stick out of the top of the case which isn't
required;!. Anyone know what they are called and know of anywhere in the
UK you can obtain one from they have the normal fixings and IEC input
and output lads just need this reduced height!..

cheers..

One possible answer is: angle grinder. I've seen plenty of PC PSUs
where the innards don't occupy the full height of the box. Take care
to avoid any metal filings, eg by decasing the pcb and reinstalling
once cut. As many cases are made as 2 Us, it will very much affect the
case reassembly, but it can all be patched up with duct tape.


NT

Now thats the sort of answer only someone on UK DIY could give!, but it
seems it might be the simplest one as fortunately theres a bit of space
over the other side of the box so put it there and extend the IEC input
lead connector we have lot of =panel mounted ones around so job
effectively done..
--
Tony Sayer

In article , Bob Eager
scribeth thus
On Fri, 25 Mar 2011 20:09:26 +0000, tony sayer wrote:

We have a rather odd specialist desktop PC that got a knackered power
unit. This wouldn't normally be a problem but on this series of units
they had a slightly lower in height power unit.

Where most all of them are 140 mm high and 85 mm wide and around 150 mm
deep (front to back) this one is 120 mm high! (85 x 120 x 150). A
standard one will stick out of the top of the case which isn't
required;!. Anyone know what they are called and know of anywhere in the
UK you can obtain one from they have the normal fixings and IEC input
and output lads just need this reduced height!..

Probably one of the five variants of SFX/SFX12V PSUs; if not, one of
those will fit although you might need to drill one or two new fixing
holes at different centres.

Doesn't quite seem to fit that description..

How easy they are to come by...I haven't looked.

What wattage?

Dunno, absolutely no markings on. Seems I will now take another supply
and fix that over the other side of the case and extend that mains input
lead etc..

Cheers all the same..




--
Tony Sayer

tony sayer wrote:
In article , Ron Lowe
scribeth thus
On 25/03/2011 20:09, tony sayer wrote:
We have a rather odd specialist desktop PC that got a knackered power
unit. This wouldn't normally be a problem but on this series of units
they had a slightly lower in height power unit.

Where most all of them are 140 mm high and 85 mm wide and around 150 mm
deep (front to back) this one is 120 mm high! (85 x 120 x 150).
A standard one will stick out of the top of the case which isn't
required;!. Anyone know what they are called and know of anywhere in the
UK you can obtain one from they have the normal fixings and IEC input
and output lads just need this reduced height!..

cheers..
Dell boxes can be like that.
You seem rather coy on naming the actual make/model!

Yes well, there simply isn't one this was made up out of component parts
a while ago now even the power unit hasn't got anything recognisable on
it!..

Go on google / fleabay with the make/model, and you will usually find a
replacement.


Bin there haven't found one!..

Do you have a digital camera ?

It's possible to post a picture of your "puzzle" on imageshack.us
(being careful to tick the box to prevent them from reducing the
resolution).

Are the connectors standard AT ? Or standard ATX with 2x10 or 2x12
for the main power ?

To give an example of how big a picture you can post, this is
a benchmark I posted some time ago.

http://img829.imageshack.us/img829/8...scomposite.gif

You could take pictures from several angles, and then glue them
all together into one picture.

Paul

On Fri, 25 Mar 2011 20:09:26 +0000, tony sayer wrote:

Where most all of them are 140 mm high and 85 mm wide and around 150 mm
deep (front to back) this one is 120 mm high! (85 x 120 x 150).

I think one of the old PC's her a had a supply of similar dimensions.
These things are mass produced to standards so the OEM's can just
pick what they want and bung it all together. I suggest having a
google along the lines of power supply size or dimension and seeing
if you can find what something that size is coded as. Some one has
already mentioned a few codes, of course even if you know the code if
this is an old machine you might not be able to find one to buy...

--
Cheers
Dave.

Go on google / fleabay with the make/model, and you will usually find a
replacement.


Bin there haven't found one!..

Do you have a digital camera ?

It's possible to post a picture of your "puzzle" on imageshack.us
(being careful to tick the box to prevent them from reducing the
resolution).

Are the connectors standard AT ? Or standard ATX with 2x10 or 2x12
for the main power ?

To give an example of how big a picture you can post, this is
a benchmark I posted some time ago.


Paul


Well I took the "Angle grinder" approach as suggested on UK DIY as it
was prolly quicker!. Gutted the old unit in fact It would have been
possible to transplant the board from a new unit except that new one had
a nice large cooling fan. So chopped all the old wiring and soldered the
mains plug now "chopped off" other end of an IEC kettle lead direct to
it via the switch, was arranged to switch the neutral so now swapped
that around to live!".,

Grommeted and tywraped the main cable coming out. Installed the new
supply fitted well right over the other side of the case made up a small
bracket a couple of self tapper's which hold it fine, wired and now back
in service not that "neat "an appearance but very effective:

Thanks to all who replied..

Cheers...
--
Tony Sayer

On Fri, 25 Mar 2011 20:09:26 +0000, tony sayer wrote:

We have a rather odd specialist desktop PC that got a knackered power
unit.

Is fixing it not an option? The same few things cause most of the
faults...

On 26/03/2011 13:16, Paul Bird wrote:
Jules Richardson wrote:
On Fri, 25 Mar 2011 20:09:26 +0000, tony sayer wrote:

We have a rather odd specialist desktop PC that got a knackered power
unit.

Is fixing it not an option? The same few things cause most of the
faults...


Given the apparent complexity of a SMPS, and the fact that you can't
learn much when it's not running what is the usual diagnostic approach?
Blown caps, burned resistors?

PB

OK, start he

Visulal inspection.
Bulging caps?
Blown fuses?
Burnt components?

Fuse blown? Blown to buggery, totally blackened?
- fault is probably on the input side. Suspect main diode bridge
rectifier. Check with meter.

Next:
Check for over 300vDC on the main reservoir caps.
If 300ish V on caps, then we move on to the switchers.

Blown fuse may suggest shorted switching transistor. Check with meter.

Simple meter check of semiconductor devices on the output dide, looking
for shorted devices.

THat's the basics.
If you need to go deeper, it's time to start tracing circuits etc.

--
Ron

In article , Ron Lowe
scribeth thus
On 26/03/2011 13:16, Paul Bird wrote:
Jules Richardson wrote:
On Fri, 25 Mar 2011 20:09:26 +0000, tony sayer wrote:

We have a rather odd specialist desktop PC that got a knackered power
unit.

Is fixing it not an option? The same few things cause most of the
faults...


Given the apparent complexity of a SMPS, and the fact that you can't
learn much when it's not running what is the usual diagnostic approach?
Blown caps, burned resistors?

PB

OK, start he

Visulal inspection.

Dusty..nothing else apparent

Bulging caps?

None..

Blown fuses?

None..

Burnt components?

None..


Fuse blown? Blown to buggery, totally blackened?
- fault is probably on the input side. Suspect main diode bridge
rectifier. Check with meter.

Fuse intact.


Next:
Check for over 300vDC on the main reservoir caps.
If 300ish V on caps, then we move on to the switchers.

Not done.


Blown fuse may suggest shorted switching transistor. Check with meter.

Was OK..


Simple meter check of semiconductor devices on the output dide, looking
for shorted devices.

THat's the basics.
If you need to go deeper, it's time to start tracing circuits etc.


Could have done but where do you stop on something that seems to be
available for 7 quid nowadays?. Course I take into account I was asking
if anyone know where the odd size unit came from. It would have been
simpler to have transplanted the board but the replacement one around 30
odd quid from WOC a while ago had a very nice cooling fan and looked a
better product so thats in circuit and all operating fine

I have over the years spend quite some frustrating hours working on
equipment with no service info and in the main its been time wasting
sadly. It would be good if manufacturers could just paste a simple paper
circuit diagram inside there equipment but hardly any do..

Thats what's quite gratifying servicing some older Audio equipment like
the QUAD range. OK olde design but info abounds and most all parts are
around or easily subbed. In fact my missus has a QUAD 33/303 combo in
her study still sounds excellent and dates from 1971 and will I suspect
will still be there for sometime yet;!...
--
Tony Sayer

In article ,
tony sayer wrote:

We have a rather odd specialist desktop PC that got a knackered power
unit. This wouldn't normally be a problem but on this series of units
they had a slightly lower in height power unit.

Where most all of them are 140 mm high and 85 mm wide and around 150 mm
deep (front to back) this one is 120 mm high! (85 x 120 x 150).
A standard one will stick out of the top of the case which isn't
required;!. Anyone know what they are called and know of anywhere in the
UK you can obtain one from they have the normal fixings and IEC input
and output lads just need this reduced height!..

I obtained a PC PS from CPC - long and thin rather than the more usual
almost square type - and fitted it into the Acorn PS case. The cost was so
low it was not worth the bother of fault finding the original.

Could you do the same sort of thing?

--
*You sound reasonable......time to up my medication

Dave Plowman London SW
To e-mail, change noise into sound.

I obtained a PC PS from CPC - long and thin rather than the more usual
almost square type - and fitted it into the Acorn PS case. The cost was so
low it was not worth the bother of fault finding the original.

Could you do the same sort of thing?


As mentioned now Dave all dun and dusted, took a standard sized one and
put it over the other side of the desktop case!..

Point take re CPC pity their website is that awkward to use sometimes..

--
Tony Sayer

On Sat, 26 Mar 2011 13:16:02 +0000, Paul Bird wrote:
Is fixing it not an option? The same few things cause most of the
faults...

Given the apparent complexity of a SMPS, and the fact that you can't
learn much when it's not running what is the usual diagnostic approach?
Blown caps, burned resistors?

I've found that the majority of faults come down to:

Faulty mains filter or DC output filter capacitors,
Shorted output rectification diodes,
Shorted switching transistor,
Failed fusable resistors

.... with the exception of capacitors that have gone high-ESR (rather than
visibly bulging/leaking), you can check for those with a simple meter.

Sometimes you do get a cascade of faults (I remember one lovely fault in
a Sun PSU which blew half the components and burnt many PCB traces), or
the faults aren't cut and dried (e.g. I had a PSU in an Acorn machine
where the 5V rectifier would only die when under heavy load), but the
above does seem to take care of the vast majority of problems and are
pretty easy to check for even without a schematic.

cheers

Jules