Welcome to the Group!

Are those specs you listed from the poer supply that you use for your
Turbo Duo? Because the official Duo power supply's specs are:

Input: AC120V 60Hz 16W
Output: DC10V 1000mA
(+)--o)--(-)

But according to Turbo Zone Direct, you can use a power supply from
Radio Shack on your Duo that has the following specs:


Radio Shack part #273-1772

9V 1300mA

"Ask for a "Q" tip (don't let them charge you another $4.99, a tip is
included. It better be for $20.00.)

The tip must be center positive when you plug it into the adapter."


Now, just because it will work, doesn't mean that it is healthy for
your system in the long run.

According to member delbo_99 in a post 5 years ago:

"The official NEC PSU for the Super Grafx was the model # PAD-113,
its specs were as follows: Input AC100V 50/60Hz 16VA Output DC9V
800mA (negative tip)."


According to this FAQ-

http://einsteinsbreakfast.com/snes/docs/voltages.txt

-the Turbo Duo uses a positive tip.

So that might be your problem right there.

Personally, I'd try to find a suitable replacement at Radio Shack and
risk wearing the system down the road. Chance are you'll have to
replave the system eventually anyway.

However, if you can confirm at some point that the system is powering
on, there is one very important thing you must do. On the back of the
Supergrafx is a small switch. It looks identical to a channel switch.
What it actually does though, is switch the system between being a
SGX and a PCE.

If its set to be a SGX and you're trying to play a PC Engine game,
then you'll usually just get a white screen.

I hope that helps you out. Let me know if you have any other
questions.







--- In turbografxnetwork@yahoogroups.com, "matthewab2001"
<matthewab2001@y...> wrote:
> Hi all
>
> I`m new here and I just found this group while googling for answers
> for this problem, so I thought I`d pick your brains. I have two PC
> Engine consoles at the moment, a US turbo duo and a japanese
> SuperGrafx. I recieved the Japanese SuperGrafx machine yesterday
from
> somebody on ebay without a power supply and I checked on the bottom
of
> the unit and it is expecting a 9Volt DC input so I took the power
> supply from my Turbo Duo and connected it, put in my nearly new
Jackie
> Chan Jap HUCARD, turned the machine on but I cannot get anything out
> of the system whatsoever (the TV says no signal, as if the console
is
> not even turned on, yes I have triple checked connections)
>
> The specs of my power supply are (according to the top of it)
>
> In 240V AC 50hz
> Out 9V DC 1.4A
>
> And the supply works perfect with my US Turbo Duo, can anyone tell
me
> if this should work with the Supergrafx too? I read you could also
use
> a Megadrive PSU but the connector from mine doesnt seem to be the
> right size to physically fit into the Supergrafx.
>
> Any help would grately be appreciated as I`m getting Macross
> withdrawal since the CD drive in my Duo stopped working :)