John's Arcade Forum - Classic Arcade and Pinball Collecting and Restoring Discussion Forum - RETRO MAME - Nintendo Vs Forum

Arcade and Pinball Discussions => Beginner's Help Corner => Topic started by: OriginalTHK on August 15, 2014, 10:34:38 am



Title: Bad Capacitor? Transistor?
Post by: OriginalTHK on August 15, 2014, 10:34:38 am
Ok so I am trying to get a multimeter because I know that will probably help me but can someone tell me if these things are fried or what? I have attached the pics below of my galaga bootleg that I am trying to fix. Thanks


(http://s12.postimg.org/9u4yvskbx/2014081595094123.jpg)

(http://s13.postimg.org/x1ved7f1z/2014081595094209.jpg)

(http://s2.postimg.org/sryf1z4nd/2014081595094305.jpg)

(http://s17.postimg.org/xo16efwdr/2014081595094412.jpg)

(http://s27.postimg.org/hda93jccz/2014081595094848.jpg)


Title: Re: Bad Capacitor? Transistor?
Post by: iankellogg on August 15, 2014, 12:07:01 pm
Those are capacitors. THe big guy is probably fine and not worth looking at. The smaller one is damaged and should be replaced. probably a 103 or 102 ceramic disk. Fixing bootlegs is not all that much fun.


Title: Re: Bad Capacitor? Transistor?
Post by: OriginalTHK on August 15, 2014, 12:11:55 pm
Those are capacitors. THe big guy is probably fine and not worth looking at. The smaller one is damaged and should be replaced. probably a 103 or 102 ceramic disk. Fixing bootlegs is not all that much fun.

So both of the big guys look ok?

Also is this what I need?
http://www.ebay.com/itm/DISC-CAPACITORS-1-50V-104Z-20-PER-PACK-/321320999257?pt=LH_DefaultDomain_0&hash=item4ad0395959


Title: Re: Bad Capacitor? Transistor?
Post by: iankellogg on August 15, 2014, 12:14:09 pm
yeah thats the one you need. price seems a little nuts but that would get it to you quickly. I doubt this will fix anything for you though.


Title: Re: Bad Capacitor? Transistor?
Post by: OriginalTHK on August 15, 2014, 12:15:23 pm
yeah thats the one you need. price seems a little nuts but that would get it to you quickly. I doubt this will fix anything for you though.

So even if I replaced everything it wouldn't make a difference? But that capacitor for a fact is bad?


Title: Re: Bad Capacitor? Transistor?
Post by: OriginalTHK on August 15, 2014, 12:17:31 pm
this is whats happening now

(http://s14.postimg.org/lu1zert7l/2014080895155021.jpg)


Title: Re: Bad Capacitor? Transistor?
Post by: iankellogg on August 15, 2014, 12:19:00 pm
oh boy, does it change what is disabled on the screen? ANy pictures of the gameboard itself?


Title: Re: Bad Capacitor? Transistor?
Post by: OriginalTHK on August 15, 2014, 01:03:31 pm
see here

http://forum.arcadecontrols.com/index.php/topic,140544.0.html


Title: Re: Bad Capacitor? Transistor?
Post by: iankellogg on August 15, 2014, 01:06:24 pm
just buy this
http://www.ebay.com/itm/GALAGA-1981-Original-Arcade-Video-Game-Main-Circuit-PCB-game-board-with-holder-/231306438074?pt=LH_DefaultDomain_0&hash=item35daf025ba


Title: Re: Bad Capacitor? Transistor?
Post by: alby13 on August 16, 2014, 02:13:46 am
If you can get your hands on the components cheap, when in doubt, replace one by one and test the board again.


Title: Re: Bad Capacitor? Transistor?
Post by: OriginalTHK on August 16, 2014, 09:00:13 am


well i put in a bid for the board and it didnt have anybody else bidding, then magically somebody outbid me. I hate auctions and preferably use the buyitnow when available. Still 3days left on it.  :'(


Title: Re: Bad Capacitor? Transistor?
Post by: VertexGuy on August 17, 2014, 02:09:49 am
yeah thats the one you need. price seems a little nuts but that would get it to you quickly. I doubt this will fix anything for you though.

So even if I replaced everything it wouldn't make a difference? But that capacitor for a fact is bad?

Wondering if somebody plugged edge connector in backwards at one point in time.