I have a Panasonic FS A1WSX with the internal transformer (AC/DC conversor) damaged. I guess it is the only trouble with this machine, so I'll try to fix it and (to spool?) this transformer and adapt it to 220V instead the original 110V (to avoid the external transformer)

I don't know the output tension of this transformer, and I was looking at funet but I didn't found any document about this. Please anybody know this values? (any FS expert here? )

thanks...

I think, that it is same transformer as in A1WX. I once get it replaced to 220V in a local domestic appliance repair company, but unfortunately I don't remember the specs anymore. It was round shaped transformer, that fit to the case and 11W I think...

Later I used same transformer in A1ST (that has originally different transformer than in A1WX with different connector) and luckily that worked.

Only problems in Panasonic FS series are:
- diskdrive belt
- power supply, that breaks
- keyboard membrane, that wears out.

Hmm... I don't think, that this helped a lot...

Hm... I guess a common european transformer (220V-12V) could work well. The only words that I can read at the damaged transformer are:

DDT5U7J02Z-W
12 9K2 TK
------------------
SP570085 TKK K2

and this "12" that appears could be the output tension. I found the service manual for the Panasonic FS A1ST (pdf) and I'll try to find any specification for the power unit at the diagrams.

Thank you anyway for your help NYYRIKKI

Humm... after reading this www.msx.org/forumtopic1210p15.html I'm thinking to plug AC 18V to the MSX motherboard... should I do this?

damn..... 9 V? 12 V? 18 V? ...

No. As far as I know that's not how things work Now, if the WSX is anything like the Turbo-R, which it should be, the PSU will be divided in:

a) the transformer which delivers some arbitrary AC voltage
b) the left-upper part of the motherboard which converts it to DC voltage

Check for a bundle of big capacitors on the left upper hand of the motherboard. Typically they'll be big, > 1000uF and about 25V. There should also be a connector with 3 or 4 pins, usually 3. If this is the case then probably it shouldn't matter too much what kind of AC transformer you hook up to it as long as you stay within certain limits. Mainly the voltage shouldn't be too high.

Ideally you'll want to find some fellow WSX owner that is willing to open up their WSX to check the no-load voltage of the transformer on each pin of the connector. My guess is that this will be something like 15-0-15V AC. I could be totally wrong though but that's why we're asking a WSX owner to check. Once you have that data, go ahead and find a suitable transformer, 20W should be more than enough.

If you can't find someone with a WSX willing to check, I'd be happy to check my GT. The only problem is that I can't guarantee that it'll be the same thing as it is for the WSX. NYYRIKKI's post seems to suggest that it isn't.

Hmm... I guess all power supplies (built in PSU) for Panasonic models should be the same (or very similar at least)

anyway, I prefer to risk but to achieve the WSX working, so I'll try with the voltage for your GT, if you like to check this one.

Thanks a lot for your help!

I forgot to say... my connector to the motherboard has 4 pins, if you could look for the order (or draw) of the 15-0-15V in your 3-pin connector it should be great...

Thanks again.

There are probably some power regulators near the transformer, check for 7805 and / or 7812. These components can handle max 18V. But you can find technical data sheets of them on the net.

Hmm... If the connector on your motherboard has 4 pins you might have a different setup here. Please check on the 'downside' of your motherboard to see if two pins (usually the middle 2) are directly connected. If this is the case it'll usually be with a big goop of solder, right on the connector. If this is not the case, but you have four different print-lines leading in four different directions you'll prolly have to check another WSX anyways. I can understand you want to use the little bugger, but no sense in making it go magic dragon on you.

In any event, here's what I got from my GT:

 CN1        PIN 1:    0V      PIN 1 - 2:  19,2V AC
 1 2 3      PIN 2: 19,2V      PIN 1 - 3:  19,2V AC
 | | |      PIN 3: 19,2V      PIN 2 - 3:  38,4V AC

Now, remember these are no-load conditions, so that voltage will prolly drop below 18V. If the connector pinout is indeed a three pin setup, I would probably go with a 16-0-16V transformer, between 15 and 20 Watts. First check the connector though, and if it's not really a 3 pin setup, I would wait till someone with a WSX checks theirs.

Note: The 19,2V applies in my particular case. I have my GT running on 120V instead of 100V. This works fine for me, but does mean that the voltage coming out of the transformer is 20% higher than it would be if running on 100V. Hence my recommendation of a 16V transformer.

Anyhoo, lemme hear how it works out... Good luck!

msd, Sonic_aka_T, thanks a lot... I'll try all of your tips this weekend and let's see, I promise to put here some images of the result, any result that happens! :S

Thankyou very much

wee... I'm going to delay the fix for my WSX, I was looking for the connector and is 4-pin definitively. A friend of mine is about to go to Japan (on september) so I'll wait for their help looking at some shops

meanwhile, if any WSX user could bringme the correct 4-pin AC output I'll be very thankful

we'll put here some news someday.... thanks to all