Jungle Hunt from Hell!!!

priglmeier

Well-known member

Donor 2016
Joined
Feb 26, 2008
Messages
1,696
Reaction score
25
Location
richfield, Minnesota
I have a JH PCB that I have been working on for some time now.

It has new RAM, all new ROMs and lot of caps replaced on it. The PCB powers on, has sound, takes coins and is playable, but the graphics are still garbled on the game play screen (only). The Splash screen is perfect, the text is perfect and the screen after inserting coins is perfect???

This PCB is killing me!

~greg
 
How do the sockets look? In general if it looks like ROM and RAM problems and you have known good parts in, it might be the sockets.
 
Sockets

I thought about that also. I have cleaned the sockets with spray when the chips were removed. Anything else I should be doing with them?
 
I thought about that also. I have cleaned the sockets with spray when the chips were removed. Anything else I should be doing with them?

If they look at all corroded I would consider replacing them. You could do a bunch of continuity tests from the sockets to the trace destinations looking for bad traces/sockets. My Qix board is luckily working, but I can tell someone did quite a bit of work to get it to that point. I'm not sure if that is indicative of the old Taito boards or not since this is my first.
 
Sockets

Part 2

I removed the GFX chips and cleaned the sockets again. They looked really nice and clean both before and after. I also replaced the caps on that board.
 
Ram

I should've gone with my instincts. Never trust a RAM test! I have run into this a million times in the computer world... RAM tests are not reliable. I swapped the RAM until I saw a change and then VICTORY!

I going to play Jungle Hunt now. :)
 
I should've gone with my instincts. Never trust a RAM test! I have run into this a million times in the computer world... RAM tests are not reliable. I swapped the RAM until I saw a change and then VICTORY!

I going to play Jungle Hunt now. :)

Excellent! Glad you got it working...
 
I should've gone with my instincts. Never trust a RAM test! I have run into this a million times in the computer world... RAM tests are not reliable. I swapped the RAM until I saw a change and then VICTORY!

I going to play Jungle Hunt now. :)


Also remember that even if it is reporting bad ram that doesnt neccesarily mean a ram is bad.
 
Back
Top Bottom