Author Topic: Galaga cocktail rebuild---- NEW PICS! (Read 4757 times)

Raven.. · « **on:** May 11, 2006, 01:26:40 am »

I traded a friend of mine my Q*Bert for his Galaga cocktail. This thing has been sitting around for a long time and hasn't been restored or played. Overall, the cab is solid, but a bit rough. The artwork is basically gone, the bottom of the cab is flaky, and it used to smell like dog urine (didn't when he brought it over though).

It was working.....mostly. Graphics issues started showing up immediately (see my other post). This is my first Galaga, so I'm in new territory. I worked on the board awhile, and everytime I fixed one glitch something else showed up.

I ended up buying a Gallag board off of RGVAC. It was dusty and untested, but complete. I built a rough-in harness to test it, and guess what? GRAPHICS GLITCHES!

I worked on it and isolated the problem to the sync buss daughter card. I replaced it with a Pac 285 board, and still no good. Mess with it some more and discovered the socket under it was shot. That has now been replaced with a new one from Fry's, and it's good to go!

Raven.. · « **Reply #1 on:** May 11, 2006, 01:30:33 am »

I have now stripped all of the Galaga harness out of the cab and cleaned it up a bit. I also built a complete Gallag harness, figured out the pinout and dipswitches, and tested it all. Working all the way!

Here's the thing.....there's little info on Gallag boards on the web, and many of them conflict! I got lucky with my main harness that it was correct the first time. I ahd to redo my video harness once. The dipswitches were a bit more work.

Now I need to put it all into the cab and solder everything.

Artwork will come later.....

Hiub1 · « **Reply #2 on:** May 11, 2006, 09:30:28 am »

Put up some PICS!!

cw · « **Reply #3 on:** May 11, 2006, 09:42:21 am »

Pics and a link to the known good wiring diagram..

Raven.. · « **Reply #4 on:** May 11, 2006, 10:19:17 am »

Pics later when I have time (hopefully tonight). I'll post my wiring diagram as well.
.

Raven.. · « **Reply #5 on:** May 13, 2006, 01:20:17 am »

Sorry, no real "before" or "during" pics on the wiring. But here is the cab and what was going on with the original board.

Raven.. · « **Reply #6 on:** May 13, 2006, 01:25:33 am »

Gala-guts!! Here's the harness and PCB cage I carefully removed. I had actually left the cage in at first, but the Gallag board set is much larger adn I had to wrack the cage to hold it. That caused the cage to short against the monitor frame! Sounded bad over the speaker and then blew a fuse. Took a little while before I noticed what was going on.

All better now....

Raven.. · « **Reply #7 on:** May 13, 2006, 01:27:33 am »

New wiring installed, except for the lights. I haven't bothered with them yet.

Raven.. · « **Reply #8 on:** May 13, 2006, 01:28:50 am »

Working all the way!

Raven.. · « **Reply #9 on:** May 13, 2006, 01:35:50 am »

Here are my pinouts/dipswitch settings. Pin A is closest to the left side of main board from above (near the blue cap on the top.)

Parts Side        Solder Side

GND           A             1        GND
GND           B             2        GND
+5 VDC        C            3     +5 VDC
+5 VDC        D            4     +5 VDC
P2 Up        E              5     P2 Down
P1 Down        F                 6     Table ***
P1 Right        H               7     P2 Right
P1 Left        J                8     P2 Left
P1 Fire        K             9     P2 Fire
P1 Start        L                  10        P2 Start
(Coin 2)          M                11     Coin 1
             N                 12     Test/Setup
P1 Up           P               13
             R           14
               S           15
             T           16
               U                 17           Speaker +
+12 VDC        V              18        +12 VDC
+5 VDC         W                19          +5VDC
+5VDC         X                20            +5VDC
GND             Y                  21         GND
GND           Z                   22           GND

5-Pin Video Header

1 Video Red
2 Video Green
3 Video Blue
4 Video Sync
5 Video Ground

Pin 1 above is closest to the edge of the board.

*** Ground this pin for Cocktail mode.
Connect speaker (-) to one of the ground wires.

SW#1
--------------------------------------------------------------------
DESCRIPTION 1 2 3 4 5 6 7 8
--------------------------------------------------------------------
COIN/CREDIT
COIN #1 free(doesn't work)ON ON ON
4C/1P ON ON OFF
3C/1P ON OFF ON
2C/1P ON OFF OFF
2C/3P OFF ON ON
1C/1P OFF OFF OFF
              1C/3P OFF ON OFF
              1C/2P OFF OFF ON
--------------------------------------------------------------------
BONUS     30K,120K ON ON OFF
30K    OFF OFF OFF
30K    ON OFF OFF
30K,100K OFF ON ON
30K,120K OFF ON OFF
               30K,100K ON ON ON
               30K,150K OFF OFF ON
               30K,150K ON OFF ON
--------------------------------------------------------------------
# LIVES   2 ON ON
3 ON OFF
4 OFF ON
5 OFF OFF
--------------------------------------------------------------------

SW#2
--------------------------------------------------------------------
DESCRIPTION 1 2 3 4 5 6 7 8
--------------------------------------------------------------------
DEMO SOUND YES ON
   NO OFF
--------------------------------------------------------------------
SCREEN STOP NORMAL OFF
   STOP ON
--------------------------------------------------------------------
STAGE SELECT NORMAL OFF
   STAGE PROCESS ON
--------------------------------------------------------------------
RANK B ON ON
D ON OFF
C OFF ON
A OFF OFF
--------------------------------------------------------------------

IG-88 · « **Reply #10 on:** May 13, 2006, 09:27:34 am »

Just curious (and fantastic job by the way!) but why go to all the trouble of rebuilding your harness' if you got the eBay board to work like you said in an earlier post? Were you just doing a little preventative maintenance? If so all I can say is WOW. How long has it taken you to get this far?

Raven.. · « **Reply #11 on:** May 13, 2006, 10:31:06 am »

Gallag has a totally different pinout than the original Galaga board. So rather than hack up a complete, working Galaga harness, I just built a new one for the Gallag board. (My original test harrness was just power and video.)

IG-88 · « **Reply #12 on:** May 13, 2006, 12:53:19 pm »

Ahh...I see now. I must say from my viewpoint thats pretty impressive

Raven.. · « **Reply #13 on:** May 13, 2006, 06:35:01 pm »

Quote from: IG-88 on May 13, 2006, 12:53:19 pm

Ahh...I see now. I must say from my viewpoint thats pretty impressive

Thanks!

glgaz · « **Reply #14 on:** May 17, 2006, 12:59:34 pm »

This came out really nice. I think most of the Galaga cocktails I can remember seeing as of late didn't look this good.

CheffoJeffo · « **Reply #15 on:** May 18, 2006, 09:50:36 am »

Looks great, EyeDoc!

IIRC, if you replace ROM 2 with the NAMCO Galaga ROM 2, you can get the Gallag board to say Galaga ... of course I've never tried it, just recall reading it on ionpool before I got a working Galaga boardset.

Cheers.

Raven.. · « **Reply #16 on:** May 18, 2006, 11:39:25 pm »

Quote from: CheffoJeffo on May 18, 2006, 09:50:36 am

Looks great, EyeDoc!

IIRC, if you replace ROM 2 with the NAMCO Galaga ROM 2, you can get the Gallag board to say Galaga ... of course I've never tried it, just recall reading it on ionpool before I got a working Galaga boardset.

Cheers.

I may do that at some point, but "Gallag" doesn't bother me one bit. I actually prefer this boardset to the Namco original (which I have and will probably sell).

I also just got a new underlay from Quarterhorse, which will REALLY improve the look!

RayB · « **Reply #17 on:** May 19, 2006, 12:08:57 am »

Who is Quarterhorse?
Does he sell PacMan underlays?

Raven.. · « **Reply #18 on:** May 19, 2006, 12:15:10 am »

Quote from: RayB on May 19, 2006, 12:08:57 am

Who is Quarterhorse?
Does he sell PacMan underlays?

He's a good guy here on BYOAC. He had an extra Galaga underlay from his own project, that was all.

Quarterhorse · « **Reply #19 on:** May 19, 2006, 10:09:09 am »

Thanks for the kind words. You know I'm going to want to see some pics of that underlay in action don't you......

Get that camera out and show us how that cab is coming along.

Raven.. · « **Reply #20 on:** May 20, 2006, 01:23:04 am »

Quote from: Quarterhorse on May 19, 2006, 10:09:09 am

Thanks for the kind words. You know I'm going to want to see some pics of that underlay in action don't you......

Get that camera out and show us how that cab is coming along.

Here it is! Eventually, I'll get new glass, but this works for now.
Now I need my CPOs and to repaint the coin door.


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