Capcom I/O V-V-VOLTAGE!

OldFoo · Post by **OldFoo** » Mon Sep 01, 2008 6:36 pm

maxchainsplendid wrote:Listen to Grant, he's way smarter than me. damn chopsticking....

i am not smart,i have been doing this stuff a long time thats all.

if i was smart i would have a job trading oil :smt005

OldFoo · Post by **OldFoo** » Mon Sep 01, 2008 7:05 pm

thanks guys!

It's on pin 3 and 4 5,41-5,43 :smt018

On the 12v it's 12,11-12,13

on the -5V it's 5,01-5,04

DO I need to adjust the +5V or the -5V? -5 is pin 5 on the jamma harness

OldFoo · Post by **OldFoo** » Mon Sep 01, 2008 7:13 pm

you really need to read at the naomi filter board

white = common

yellow = +5,you want 5.10

-5 is not used on most jamma boards so ignore it

OldFoo · Post by **OldFoo** » Mon Sep 01, 2008 7:57 pm

Grant's right, you do need to check your voltage at the Naomis mobo input - but if you want to try for a quick fix, just turn up your +5v so that it reads 5.13 on your meter. then, if it freezes still, it's more likely your I/O that's the problem.

At the mobo connector, the pins are +12v (Red), +5v (Yellow), +3.3v (Brown), and Grounds are white. (no pic so I don't make a sloppy error this time. i'm smart I swear, lol)

Just saw that Grant already told you the colors, lol. I'm 2 for 2 now.

OldFoo · Post by **OldFoo** » Mon Sep 01, 2008 7:58 pm

I just did a test with capcom I/O on and NAOMI hooked up. Without a Rom board it worked occasionally. With board it got it working when voltage was at 4,90.

I put the sticks of the meter on the jamma harnass backside...

The max I got at the PSU was 4.9 or some higher. After a minute power on or so, the voltage eventually got 5,05 or so. Virtua Tennis booted and I could play 1 game. Second game the voltage ran to 4.8 at a cutscene with more 3D graphics and the screen was dead.

My PSU is at the highest possible voltage. I only can get it lower...

This is a picture of my PSU: (don't look at the circles)

OldFoo · Post by **OldFoo** » Mon Sep 01, 2008 8:00 pm

Time for a new PSU bud. If 4.9 is the max w/the knob cranked, your PSU's on its way out dude

OldFoo · Post by **OldFoo** » Mon Sep 01, 2008 9:10 pm

i bet you get a much higher voltage at the supply output plug,if this is the case you can double up the ground and +5 wires-this will counter act the voltage loss across the cables

OldFoo · Post by **OldFoo** » Mon Sep 01, 2008 9:28 pm

When I don't hook up anything on the cab, I got 5,4V

What do you mean? I need to unplug some wires at the jamma harness? 2 and 3 for instance?

Or did I misunderstood? :smt012

OldFoo · Post by **OldFoo** » Mon Sep 01, 2008 10:12 pm

you should be able to get nearly over 6 volts from a good psu,your options are to repair or to replace like maxchainsplendid suggested earlier

OldFoo · Post by **OldFoo** » Mon Sep 01, 2008 10:15 pm

but you said something about the voltage loss? I can't do anything else that buy a new PSU?