Gallag Power requirements

musicman282

Active member
Joined
Jul 24, 2010
Messages
891
Reaction score
43
Location
Akron, Ohio
So I purchased a Gallag board (Galaga Bootleg) because I wanted another game in my Ms Pac, but do not like the poor quality of emulation provided by the icade 60 in 1. I didn't want to hack up the wiring in my cab so I purchased a pac to jamma adapter from lizard lick amusements.

http://www.lizardlick.com/Lizard-Lick-Deluxe-Jamma-to-Pac-Adapter_p_118.html

I also purchased a jamma adapter for my Gallag board in order to plug it into my Ms. Pac. I booted it up and the screen was giving me a bunch of garbage and I couldn't get it to sync correctly. The board was also giving me a ram and rom error that I could barely read as the screen was going haywire.

I measured the 5v on the gallag board and it was reading a measly 4.1V! I had done some research which said that gallag boards are more sensitive that other boards when it comes to the 5v. I would think most boards won't run on 4.1v though.

I plugged the board into my MAME jamma cab and it booted right up with no problems, unfortunately it has a horizontally oriented monitor.

My question is this. How much power do these boards take? The lizard lick deluxe pac jamma adapter says that it will source 3A @ 5V which I would think should be plenty. The 5v voltage regulator at U1 was getting super hot when the gallag board was plugged in so I think that the board was probably too much for the adapter.

Anyone have an experience like this? I really don't feel like installing another harness in my ms pac.
 
Is this the adapter from yanton. If it is your monitor would just display scrambled garbage. It is wired wrong and you won't get it to sync. The little 5 pin plug on the video board is RGB sync GND and his adapter is wired RGB GND sync. You need to switch the white and black wires in the connector.
 
Is this the adapter from yanton. If it is your monitor would just display scrambled garbage. It is wired wrong and you won't get it to sync. The little 5 pin plug on the video board is RGB sync GND and his adapter is wired RGB GND sync. You need to switch the white and black wires in the connector.

It is the yanton adapter. I already switched the sync and ground wires. It works great in my Jamma cab, but not in the pac cab that I want to use it in.
 
I cant remember off the top of my head, does gallag have the connector that jumps 5v from the bottom board to the top? I know the konami boards often have problems with this connector and some boards will have issues if its not making good contact. Usually you can use a small jewlers screwdriver to bend the contacts in to make a better connection. I have swapped them out to .156 header and connectors on boards where the connector was damaged or missing.
Not all the konami boards have this connector but they have a spot on it on the board so it can be added. Again, not sure on the bootleg board. So what im saying is measure you +5 on both boards then work your way back and find out where the most power drop is occuring. It could just be a dirty edge connector or something simple like that.
 
Back
Top Bottom