The fuse is 6.3 A. And i =t gets hot. So it might look like something around
5V 5A. A PC powersupply can supply this without problems.
-----Original Message-----
From: Stefano Fronteddu [mailto:[EMAIL PROTECTED]]
Sent: Monday, February 08, 1999 9:09 PM
To: [EMAIL PROTECTED]
Subject: R: NMS8280 HELP !!!
Hi Alwin,
we need the electrical current (in ampere) furnished by the 9005
integrated (used in the power supply circuits).
We don't have +5V signal in the out of the power supply (going to the
motherboard)
We suppose that this current has to be high, but how ?
Are you able to find this kind of integrated circuits in Holland ? Here in
Italy we can't find it.
(also spanish friends help us ... if you can)
Thanks for your kindness.
Stefano
-----Messaggio originale-----
Da: Alwin Henseler <[EMAIL PROTECTED]>
A: [EMAIL PROTECTED] <[EMAIL PROTECTED]>
Data: luned� 8 febbraio 1999 19.49
Oggetto: Re: NMS8280 HELP !!!
Hi all,
"Stefano Fronteddu" <[EMAIL PROTECTED]> had diz problem:
> I've got a MSX2 NMS8280 by Philips. I'd like to know what are the voltages
> of power supply.
> With my tester I've found
>
> +12 ? ? -12
>
> What are the right value that I can't found ?
If you're talking about the power connector near the front
panel/power switch, marked as "PC", and have this in front of you,
values should be (from left to right):
5 (yellow) = -12 volts
4 (black) = GND (0)
3 (blue) = +5
2 = no connection
1(red) = +12
> Is there anybody that is able to send me the electrical schemas of my
> NMS8280 ? I need any kind of information about this machine, any schema, I
> need this information as soon as possible because I have to repair my MSX.
I
> need it working again !
I have this, but it would be kind of difficult to send a copy to
Italy, and have you pay for the costs.
Don't have it online, and I don't have the time to put all the pages
through a scanner. Would give too many big files anyway.
Cleaning/re-working these would take too big an amount of time.
If you want, I can help you with the repair though, by checking my
schematics with your findings/observations/measurements.
I did this once before, and it got a NMS8280 in Belgium repaired.
I would need EXACT answers to questions to you, for that. Please mail
me if you think it would help.
> Moreover I know that there is someone (in russia I think) that have put
> NMS8280 motherboard in a PC case.
> Is there a way yo use PC power supply with my NMS8280 motherboard ?
No problemo. Yust make sure you make the right connections.
(+5 to +5, GND to GND, etc.)
A mistake here can kill your computer in a sec >;-((
Alwin Henseler ([EMAIL PROTECTED])
http://huizen.dds.nl/~alwinh/msx MSX Tech Doc page
http://huizen.dds.nl/~alwinh/for_sale
anyone in the Netherlands still needs a 486 mainboard? (sorry ;-)
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