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MiSTiFCHRiS · Joined: 14 Jul 2007 Posts: 13 Location: New Zealand

I just got a GD SF IV a few days ago from a chinese man at the market lol. I found an old 12v 1000mA power supply and plugged it in but it doesnt go Sad

. So I opened it up and tested the floppy disk power wires and they were only getting 0.45volts?
I just cleaned all the connectors but still no
Anyone help

kyuusaku · Joined: 26 Jul 2003 Posts: 941 Location: .ma.us

You're the first person to ever own a Doctor SF IV, but likely it contains a 7805 which needs to be replaced.

MiSTiFCHRiS · Joined: 14 Jul 2007 Posts: 13 Location: New Zealand

Dammit. Are they hard to get. Is it worth replacing

kyuusaku · Joined: 26 Jul 2003 Posts: 941 Location: .ma.us

7805 cost about US$0.30 and are the most common voltage regulator. I would say it's worth replacing.

MiSTiFCHRiS · Joined: 14 Jul 2007 Posts: 13 Location: New Zealand

Oh sweet Cheers man

MiSTiFCHRiS · Joined: 14 Jul 2007 Posts: 13 Location: New Zealand

Hey do they have different pinouts? Also theres fixed and variable voltage ones does it matter which one I get? Lol and 30 cents, here in New Zealand they are about $4 Shocked

kyuusaku · Joined: 26 Jul 2003 Posts: 941 Location: .ma.us

7805 are fixed at 5V so there shouldn't be any sold as variable regulators. They do come in different packages though, the one in the GDSFVI is in a TO220 package.

This is what you want:
http://www.jameco.com/webapp/wcs/stores/servlet/ProductDisplay?langId=-1&storeId=10001&catalogId=10001&productId=51262

MiSTiFCHRiS · Joined: 14 Jul 2007 Posts: 13 Location: New Zealand

Hey just installed one and its still not working. The floppy disk drives power output went to 2volts though. Maybe more than one components burned out?

kyuusaku · Joined: 26 Jul 2003 Posts: 941 Location: .ma.us

Are you sure your 9-12V power supply is good for the job? (center polarity negative?)

MiSTiFCHRiS · Joined: 14 Jul 2007 Posts: 13 Location: New Zealand

Sweet! Got it going! Thanks, but I downloaded DBZ Supaa Seiya Densetsu (8mbit) and put it on a floppy disk. Its keeps loading it and a percentage comes up and sometimes it just goes to a black screen. I havent got the game going yet

MiSTiFCHRiS · Joined: 14 Jul 2007 Posts: 13 Location: New Zealand

Lol i'm having some problems again. I found out how to go into the menu (Hold R) but when I try to do most of the settings in it its freezes or crashes. I cant change the language or anything. Also the only game i've got going is Daffy Duck Marvin Missions. I have a copy of Dragonball Z Suupaa Saiyajin Densetsu thats got an "ok" checksum and its apparently a good rom but it doesnt work. Can any of you get this game going?

kyuusaku · Joined: 26 Jul 2003 Posts: 941 Location: .ma.us

rbudrick · Joined: 26 Mar 2004 Posts: 373

I'm still puzzled about this being an SFIV, but whatever. Can we see a pic of it?

Anyway, I wanted to point out that in line with what Kyuusaku is saying, I have seen my GDSF7 do some very strange things when the improper voltage was applied to the unit. If I put the voltage too low, it turns on as a Professor SF3 or whatever. So yeah, these units can act very strangely when there' power problems.

-Rob

kyuusaku · Joined: 26 Jul 2003 Posts: 941 Location: .ma.us

MiSTiFCHRiS · Joined: 14 Jul 2007 Posts: 13 Location: New Zealand

Do you think i should try a lower voltage power supply. Also mine runs at about 15-16 volts when its not under load