Question about a Moon Cresta PCB..

Dlsmith

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I purchased a Moon Cresta and I'm in the process of restoring it. The cabinet was in great shape, but the main PCB had a lot of corrosion on it.

I purchased another supposedly Moon Cresta PCB, out of a cocktail game. It does not have the heat sink and two of the 10,000uf caps in the corner of the board. Someone mentioned this is for the audio.

Does anyone have any idea why they would be missing? Any information is appreciated.

Thanks.
 

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The audio amp is over on the other side by the volume control and dip switches. That missing hardware is for a Power supply regulator section, similar to what you would find on a Midway PacMan or Ms Pac logic board. It probably used the same regulator and pass transistor as P/M did too.
 
They do that to run game board from a DC power supply instead of AC from transformer. I have a Pacman I may do this to also. There is probably diodes missing also.

I purchased a Moon Cresta and I'm in the process of restoring it. The cabinet was in great shape, but the main PCB had a lot of corrosion on it.

I purchased another supposedly Moon Cresta PCB, out of a cocktail game. It does not have the heat sink and two of the 10,000uf caps in the corner of the board. Someone mentioned this is for the audio.

Does anyone have any idea why they would be missing? Any information is appreciated.

Thanks.
 
first pic is the AC voltage version and the second is a DC voltage version. DONT PLUG THE DC BOARD INTO YOUR AC CABINET. Bad things will probably happen to it.

That first one looks like it can be cleaned but its also missing a bunch of other parts in that picture.
 
first pic is the AC voltage version and the second is a DC voltage version. DONT PLUG THE DC BOARD INTO YOUR AC CABINET. Bad things will probably happen to it.

That first one looks like it can be cleaned but its also missing a bunch of other parts in that picture.

No probably about it....very bad things will certainly happen.. You can put DC to the AC board but you usually have to up the DC voltage. Again DO NOT put AC power to DC board...EVER..
 
perhaps its not in the picture but the board in the second pic is missing the board that should be on the back.
 
Its missing the 1H/1K rom card for the GFX

You can make a single rom mod for this game but without that GFX rom card it won't work correctly
 
Thanks for all the information.

There is a second board to the one in the second picture, I didn't show it.

Think I'll try to fix the original board, I took out all the chips that had some of their legs missing from corrosion. I do have all the daughter boards from both sets of PCBs.

Thanks again!
 
I don't know. I bought the game at a auction, there was no keys of course, so I didn't see the insides till I got it home and drilled out the lock. The cabinet and monitor are in great shape. There is no burn what so ever on the screen. I was surprised at the shape of the PCB when I opened it up. No other boards, or parts has the corrosion the PCB had. Almost all the EPROMS had at least one leg missing from corrosion.

Didn't give a lot for it, so I could part it out and do fine. But I want to get it back working.

This is my first arcade game restore, I usually do pinball machines.

I'm looking for a MAME ident software. I bought a reader and I want to be sure I have the EPROMS correct. Can anyone give me any suggestions.

Here is a picture of a couple of the EPROMS I took out of the game.
 

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It may match up to this from the mame source

https://github.com/mamedev/mame/blob/master/src/mame/drivers/galaxian.cpp#L8822-L8841

"""

ROM_START( mooncrstg )
ROM_REGION( 0x8000, "maincpu", 0 )
ROM_LOAD( "epr194", 0x0000, 0x0800, CRC(0e5582b1) SHA1(946ad4aeb10c0b7b3f93fd24925cc9bcb49e443c) )
ROM_LOAD( "epr195", 0x0800, 0x0800, CRC(12cb201b) SHA1(ebb01ec646b9e015cbcb93f70dfdaf448afefc12) )
ROM_LOAD( "epr196", 0x1000, 0x0800, CRC(18255614) SHA1(b373e22d47c0f7facba13148ca9c462ec9a0d732) )
ROM_LOAD( "epr197", 0x1800, 0x0800, CRC(05ac1466) SHA1(cbf93a8ce0925fa1c073c74f1274b190d9faefaf) )
ROM_LOAD( "epr198", 0x2000, 0x0800, CRC(c28a2e8f) SHA1(9ff6bab1e1185597ba55cb0d6086091a1fce01a6) )
ROM_LOAD( "epr199", 0x2800, 0x0800, CRC(5a4571de) SHA1(2a4170dee105922fc69c99b79f6f328098e81918) )
ROM_LOAD( "epr200", 0x3000, 0x0800, CRC(b7c85bf1) SHA1(cc9f593658ea39c849d80c83ee0c2170cc29879e) )
ROM_LOAD( "epr201", 0x3800, 0x0800, CRC(2caba07f) SHA1(8fec4904e12b4cfb6068784007278be986a3eede) )

ROM_REGION( 0x2000, "gfx1", 0 )
ROM_LOAD( "epr203", 0x0000, 0x0800, CRC(be26b561) SHA1(cc27de6888eaf4ee18c0d37d9bcb528dd282b838) )
ROM_LOAD( "mcs_d", 0x0800, 0x0800, CRC(13932a15) SHA1(b8885c555c6ad7021be55c6925a0a0872c1b6abd) )
ROM_LOAD( "epr202", 0x1000, 0x0800, CRC(26c7e800) SHA1(034192e5e2cbac4b66a9828f5ec2311c2c368781) )
ROM_LOAD( "mcs_c", 0x1800, 0x0800, CRC(24cfd145) SHA1(08c6599db170dd6ee364c44f70a0f5c0f881b6ef) )

ROM_REGION( 0x0020, "proms", 0 )
ROM_LOAD( "mmi6331.6l", 0x0000, 0x0020, CRC(6a0c7d87) SHA1(140335d85c67c75b65689d4e76d29863c209cf32) ) /* Compatible with 82s123 prom */
ROM_END
"""
 
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