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 11 
 on: December 09, 2008, 04:37:43 AM 
Started by MacGyver - Last post by vaxx
I have files if you want them  Roll Eyes

SHHHHHHH..... Wink

 12 
 on: December 09, 2008, 04:36:48 AM 
Started by Shagma - Last post by vaxx
you can work out the pinouts reasonably easy if you are patient.

General JAMMA pcb harnes making 101


+++++++++++++++++++
++++++ Warning ++++++
+++++++++++++++++++


I'm not responsible if you fry a pcb.
Take the proper care when attempting anything written below.
If you are having your first attempt, please use a pcb that has little value.
Thankyou





Get a black marker and trace the ground line from a known ic back to the edge connector. Do the same with a 5v pin with a red marker.

This gives you the basics for harness. You can run the pcb by wiring this up to the appropriate jamma connector fingerboard position.

Now attach a wire to one of the colours. Fire up the pcb. Assuming that you aren't trying to pcb that needs other voltages too.

I'm also assuming you have the correct monitor connected correctly.

You can probe each pin with either a logic probe or the colour you picked.
If you get one of the correct colours you should be able to make out a picture.
With the probe you will hear a steady signal the is either high or low pulsing fast. This is good. Write the pin number down. Now do the same with the other two colours.
You can also distinguish the sync pin after a bit of practice. You should see a rolling diagonal line on the screen. If you have used a probe a bit, you should be able to pick the tone/pulse of the probe (frequency of the sound/led's  is related to the signal waveform)
If you are probing with the sync wire, you will hear when you probe a colour pin or the monitor will go blank and quiet down when you hit the sync pin.


After doing this for all colour and sync pins (assuming you have a comp sync pcb, separate sync ( h sync / v sync) is a little harder. sometimes you can just put both signals into the comp input of the monitor, other times you need a sync combining circuit. Plenty floating around on the net.. Doesn't need to be covered here.) you should have a picture, might be a need a bit of colour swapping to look right Cheesy

After this point it's a matter of figuring out the 12v's for the sound. You can trace it back from the amp.  Then speakers wires. You can solder one to ground and use the other to probe the pins or you can trace the amp circuit out

To figure out the pinout, use a grounded wire to probe the pins and see what happens. wire each one up to the corresponding pin until you have the coins, service and all player controls.

Happy gaming

 13 
 on: December 09, 2008, 04:09:19 AM 
Started by tim - Last post by vaxx
Yeah, caught me by surprise  Shocked Came looking for a pcb pic and hit this. Still haven't looked around much. Been busy reading Cheesy to see what's happening.

Haven't gotten much arcade time in over the last year or so. No real want for it at all. Undecided
 So I shelved everything and concentrated on finishing the shed off before I start doing anything arcade.

It was only from an email that I received tonight that got my to look at this site. And I found this forum. 
Feel a bit like getting back into it since it's the first non business contact for almost twelve months.   Huh

Hopefully it will become a good resource for people who still believe pcb's are true arcade machines.
Nothing wrong with emulation, but bit like diet food, sort of tastes ok, but not the real thing 




Tongue Cheers, Geoff

 14 
 on: December 09, 2008, 03:57:52 AM 
Started by Joeylc - Last post by vaxx
Lets see.  All this stuff is under wraps at the moment until i finish the shed (time and money permitting Sad )

 Asteroids cocktail
 Ipm invaders cocktail ( in a 20" pacman style cab)
 half finished Bosconian midway cocktail
 dead Pole Position 2
 Galaxian upright
 Stunt Cycle upright
 4 generic jamma cabs
 counter top
 33" mame/entertainment/jukebox console
 1 Astrofighter Upright to be restored
 Space Wars
 Irem Moon Patrol Mini


Plus 200 + pcbs
2 half built pinballs
control panels and other crud stashed everywhere Smiley

Have owned quite a few others, probably 30 was the most at once.


 

 15 
 on: December 09, 2008, 03:50:09 AM 
Started by Ric - Last post by vaxx
Pictures broken so I can't see what board set it is....


But, In the bootleg schems I have C8 is a 74ls299 (20 pin) and B8 is a 74ls157 (16 pin)

I would like to see a pic to see if I have the same pcb set here and I can verify what the chips are

Cheers, Geoff

 16 
 on: November 23, 2008, 06:31:56 PM 
Started by tim - Last post by tim
Company : Williams
Cabinet : Dedicated
Monitor : 19" vertical color raster
Year : 1986

Traded my Crystal Castles for this.


 17 
 on: November 09, 2008, 01:31:38 PM 
Started by crebou - Last post by crebou
auto answer:
I test to burn with others 128ko eproms (27C010), and they aren't compatible with the Sega board.
After found 2 others 27C1001 eproms, the ShinobiZ & Nao fix works perfectly  Wink

 18 
 on: November 05, 2008, 09:51:24 AM 
Started by crebou - Last post by crebou
Hi everybody,
Today, I decide to fix my Wonderboy Monster Lair System 16B board.
I have the world version with FD1094 - 317-0089 and I change the battery last year.
So, the board works perfectly (for the moment  Grin)

I found a 68000 this week, so, let's go for burn...
I see on your DBS link Tim that your test OK burning epr12136.a5 -> epr12258M.a5 and epr12137.a7 -> epr12259M.a7

But for me, it's not working.
I see on MAME db that 12258 and 12259 come from set 317-0098 with 8751, but if I understand the message on your site, these eproms are modified and I don't need this 8751, right ?

Someone have an idea for my problem ?
I don't found an unencrypted set on the web  Sad

 19 
 on: November 05, 2008, 09:33:56 AM 
Started by Shou - Last post by crebou
yeah, thanks for the Tenchi Wo Kurau II fix.
A friend send me his jap board in the past for a revival.
Hopefully for him, it was the battery on the Qsound board that was dead...so, I put him a new battery on the C board.
I'll tell him that the second battery can be fix Smiley

For the suicide fix wanted, I add Muscle Bomber Duo : Heat Up Warriors / Muscle Bomber Duo : Ultimate Team Battle (all versions, and Qsound fix too)

 20 
 on: October 13, 2008, 09:15:17 PM 
Started by FXShovelhead - Last post by tim
There's not one simple answer. It'll take a lot of troubleshooting to say exactly what your problem is. You should start by identifying what kind of monitor you have. Any labels?

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