Panasonic FS-A1GT power supply

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Van Meits

Scribe (5538)

afbeelding van Meits

02-08-2013, 12:51

I'd like to have an internal PSU of 230V, but there are some IF's attached to that.
I have to be able to insert it myself (preverably without (too much) soldering, since I suck at that) and the PSU must be ready made and have the same dimensions... Since I guess I need to do some (in my eytes) scary soldering actions, I think I'll stick to the step down convertor... Got a big stash of spare ones in my crate o' goodies anyway Smile

Van luppie

Paladin (854)

afbeelding van luppie

29-04-2014, 22:45

I finally have a Turbo-R again (and a weblog) so this time I documented howto modify the powersupply of a Turbo-R to 230V

Link

If you like my howto's on my website please like my Facebook Page

Van Elrinth

Resident (54)

afbeelding van Elrinth

24-05-2016, 08:16

luppie in this how to, did you use the same psu? https://www.conrad.nl/nl/universele-nettransformatoren-12-0-... ?
I have problem with the stock psu overheating, so I thought I would do this mod and also recap the whole board.

Van Meits

Scribe (5538)

afbeelding van Meits

24-05-2016, 10:46

That's indeed the one Luppie put in my ST.

I had this ST for about a year until Luppie fixed this. In that time I always had a filled slot expander connected. That didn't do any good to the PSU, or so Luppie said. Two spots on the transformer were showing weak spots where it was about to fail (read: burn).
Now, with the 230v PSU inserted, it has a fresh start, it has a normal (for me) connector and it's about three times stronger than the original... There's nothing I can throw at it to make it stressy...

If you're using 40/45 watt 110 volt step down converters, know that I destroyed two brand new ones in a coupe of months... They're not up to the task... They're wrong and should not be used (too long)...

Van Elrinth

Resident (54)

afbeelding van Elrinth

24-05-2016, 15:27

I put an order on conrad.se (swedish version of conrad.nl) of the PSU.

I was using this: http://www.ebay.com/itm/SK-20E-Voltage-Step-Down-Transformer...

It has worked great for my FS-A1. But maybe it damaged my FS-A1GT. Or maybe it was just the capacitors which had given up which in turn strained the PSU... Dunno, I'm not the best person with electronics :)

Van Meits

Scribe (5538)

afbeelding van Meits

24-05-2016, 16:22

This stepdown converter has all the properties to be good. 100 volt and 1000 watt. That'd suit your MSX quite well. Several MSXes at the same time even. So I wonder what's really wrong with your turbo R. You could just open it and check by looking if the caps inside the turbo R aren't bulged. That stepdown converter hasn't been stressed by just one computer.

Van maxis

Champion (512)

afbeelding van maxis

25-05-2016, 08:42

Elrinth wrote:

I was using this: http://www.ebay.com/itm/SK-20E-Voltage-Step-Down-Transformer...

It has worked great for my FS-A1. But maybe it damaged my FS-A1GT. Or maybe it was just the capacitors which had given up which in turn strained the PSU...

This converter is too small for 1000W transformer and also very light. According to the manufacturer http://www.nissyo-ind.co.jp/travel_hyo.htm it is for the heating equipment only.

IMHO, there is no transformer in it and this step-down converter uses the synchronous power modulator based on thyristor/thyristors.

So it will burn your precious machine in weeks!!!
Why? Because instead of sinusoidal AC it will drive somewhat very different at the input of your MSX AC transformer. Only a very few MSX machines, which have no AC mains transformer will work w/o any risk. This includes all the models of YAMAHA YIS503/604/805 etc, very early model of Philips NMS8235/00.

Buy something with the transformer in it. 50W transformer based converter is good enough to power the most of the machines.

Van Meits

Scribe (5538)

afbeelding van Meits

25-05-2016, 11:26

Now that you mention it, it's quite small indeed... It's quite a bit smaller than the beast I have here, which is "only" 130Watt... Quite a bit cheaper as well...

I stand corrected with saying that that stepdown converter has all the properties to be good ;)

@ Elrinth, try find one of those Japanese UT transformers. They're heavy, solid units doing a great job. That'd prevent you from soldering ;)

Van syn

Paragon (1920)

afbeelding van syn

25-05-2016, 13:50

lol that ebay one got BIG warning messages saying DONT USE ON MICROCOMPUTERS Big smile

Van l_oliveira

Hero (526)

afbeelding van l_oliveira

26-05-2016, 03:40

syn wrote:

lol that ebay one got BIG warning messages saying DONT USE ON MICROCOMPUTERS Big smile

Probably because MODERN microcomputers can draw from 250 Watts to 1000 watts depending on how much computing power you get on them.

A PC AT ranging from 1997 to 2004 (Pentium to Pentium III range) is between 100watt and 230Watt for the CPU tower alone. I suppose that's why the warning is there. So, I don't think that was written with 1980-ish technology in mind.

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