"Spehro Pefhany" wrote in message
...
On Tue, 14 Aug 2012 14:01:12 -0400, Tom Gardner Mars@Tacks wrote:

On 8/14/2012 1:12 AM, Spehro Pefhany wrote:
On 14 Aug 2012 04:20:04 GMT, the renowned Winston
wrote:

On Mon, 13 Aug 2012 14:36:32 -0400, Tom Gardner wrote:

My "UNIQ" 2-axis DRO display has failed. The vendor says the power
supply is bad and can't get a replacement. They have offered a direct
replacement "UNIQ" for $295 or a "JENIX" display for $200.

I have asked them to return the unit. Does anyone know anything about
these? Would the PS be fairly easy to repair? I'll know more when I
get it back and apart.

http://www.penntoolco.com/catalog/pr...ategoryID=6219

Power: DC 5V (15%) 80 MA.

Does that use a wall wart, Tom?

'Should be very easy to replace.

--Winston

80mA (400mW) doesn't sound like nearly enough. Maybe that's the power
_output_ for the scales.

The "Sino" lathe DRO I have contains a small more-or-less open-frame
5VDC switching supply, just 5V out. about 140 x 60 x 40mm. I would
expect yours is quite similar. Similar 25VA units are around $20 qty
1.


(RS-232 for the last decade or two generally used +/-V generated from
5V or 3V using a MAX232 or similar chip).




Best regards,
Spehro Pefhany


Imagine if it only needs 5v, I have plenty of old computer PS's, any
reason I couldn't cob something external using one of those?

Probably not.. AFAIR the newer ones need pins shorted to get them to
start up and the load might not be enough to start, but I bet it would
work. It's a big ugly box to hang off the back, but if that doesn't
bother you, I don't see much of an issue.



Shorting the Green wire to ground will fire-up the supply.