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Latest Member: deejaymc
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1  General Category / Repair logs / Re: Qix (bootleg) #3 on: December 09, 2008, 07:40:48 PM
Check any tantalum caps on the 5v rail. I've had a few qix bootlegs and had to change most of them due to internal shorts
2  General Category / Monitors / Re: Kortek 19" hook up on: December 09, 2008, 04:50:15 AM
The manual for the Imperial 19" Monitor is what the Kortek is a direct copy of.
3  General Category / Mail Bag / Re: displaying, say... street fighter 2 [on a TV] on: December 09, 2008, 04:48:15 AM
Find an Amiga modulator and use that. Or something like this
http://www.ambery.com/rgbcgatovgac.html



 Plenty of web info on that or find a tv with a scart connector and input the rgb into that.
http://www.google.com.au/search?hl=en&safe=off&client=firefox-a&rls=org.mozilla:en-GB:official&hs=iuL&sa=X&oi=spell&resnum=0&ct=result&cd=1&q=scart+rgb+arcade+pcb&spell=1
4  General Category / Mail Bag / Re: Zookeeper on: December 09, 2008, 04:42:39 AM
or do the 4164 conversion

http://www.robotron-2084.co.uk/techwilliams4164.html

Plenty on good info on that site

http://www.robotron-2084.co.uk

Cheers, Geoff
5  General Category / General Discussion / Re: Pac / Ms. Pac stencil sets? on: December 09, 2008, 04:37:43 AM
I have files if you want them  Roll Eyes

SHHHHHHH..... Wink
6  General Category / General Discussion / Re: 1942 bootleg pinout on: December 09, 2008, 04:36:48 AM
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
7  General Category / General Discussion / Re: Welcome to ArcadeCollecting.com! on: December 09, 2008, 04:09:19 AM
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
8  General Category / General Discussion / Re: How many coin operated games do you own? on: December 09, 2008, 03:57:52 AM
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.


 
9  General Category / General Discussion / Re: Donkey Kong Junior Issues on: December 09, 2008, 03:50:09 AM
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
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