Whitechapel MG-1 : dead power supply ?

From: Bernd Kopriva <bernd_at_kopriva.de>
Date: Fri Jan 16 11:20:28 2004

My power supply is made by Europower, Model No. EP3608/09 ...
... does anyone have the same one ? I know from Tony Duell, that different
power supplies from different manufacturers have been used.
In my PS, there's a little addon PCB (6 pins), which has 3 transistors ...
two of those are physically damaged, and one of the capacitors on that
PCB has some smut (but no visible damage).
Are the schematics for this PCB available ?, can anyone tell me, what transistors
have been used ?

Thanks alot
Bernd


On Wed, 14 Jan 2004 22:30:25 +0000 (GMT), Tony Duell wrote:

>>
>> T
>>
>> I have heard there is a trick with mg-1 power supplies not working ...
>
>There's a trick if the machine won't power up at all...
>
>The power switch on the MG1 is software-controlled (!), and it runs off 5
>AA NiCd cells on the power distribution board (these also keep the RTC
>running). They're charged when the machine is running, but of course if
>you leave it powered-down for too long, they go flat, and you can't turn
>it on agaain.
>
>The way round this is to connect a 9V battery (a PP3 or similar) to 2 of
>the pins of one of the connectors on the power distribution board (I can
>get the exact details). The machine will then power up, and you leave it
>running until the NiCds are charged
>
>A kludge, sure, but it's better than the Torch XXX where the official
>procedure is to replace the PSU assembly if the battery goes flat (!).
>
>-tony
>
Received on Fri Jan 16 2004 - 11:20:28 GMT