Need Help with Jungle King (Not Working!)

[scamp]

I recently picked up a non-working Jungle King. At first I thought it would just be the poser supply since the board had a hole burnt through it!

Today I installed a switching power supply and adapter and the lights come on, the monitor starts up but has a blue image sort of scrolling through..obviously not good and I don't think that's the game at all, just garbage. I've tried to attach a picture of this...

I figured I'd try to click the coins ups and start a game but nothing happens.

How can I determine the boards themselves are getting power?
What else can I do to test things? (I do not have another known-working boardset yet)....
Should I be testing at the filter board?

Any help would be appreciated...please be specific as I am still an early-game-guru!!

THANK YOU!

 

[scamp]

Power is coming to the boards via the white connector "H" ...

I tried check power on the Z80A and wasn't getting a good 5v reading...

 

[kstillin]

Try twisting around those horizontal and vertical hold knobs on the monitor. It looks like you have SOMETHING there, but it's hard to say what. May be a error.

 

[scamp]

I tried doing what you suggested but I can't seem to get a stable image..It changed a bit though...I tried to record it but you'll see that we see black bars in the picture that are not apparent to the naked eye...

 

[scamp]

So today I pulled the boards, reconnected all the connectors, reseated some of the chips etc...

I put it back in the machine and reseated all the wire connections of the filter board and now I get something!

I can see the logo screen sort of though there are jumbled images...as well as the teaser of the jungle king swinging through the tress and such..Again you can see that its the game, just the video is messed up in different spots.

I am able to trigger a coin with just one of the coin switches (it actually made a sound too!!! so the speaker works and maybe the sound board!), however if I try to start a game it will not go start...

So there are still problems here, but it is a little better now..

Any recommendations would be appreciated!!

Thanks!!

 

[scamp]

I went back to the machine and tried adding multiple coins and I was able to start a 2 player game!!

The sounds were there, controls worked...It's really some bad graphics...in fact the scene where the girl is tied above the pot looks the best and the rock wall..but the water and tree-swinging looks horrible as does the title screen...

I'm uploading some of the shots of good and bad....

**Also, what setting on a monitor shifts the screen image over? I have a black bar on the right and I know there is some knob I've used before that centers the image on the screen...thx!

 

[kstillin]

much better!

You may actually have a couple of the graphics chips swapped around. Or one of them could be corrupt. See if the labels on the ROMS correspond to a working layout.

Post a picture of the top board here. With enough detail to read the labels

 

[scamp]

So I played around a bit more...seems I cannot start a single player game only a 2 player...I suspect I made need to create some new connectors on the wiring harness since when I jiggle connectors on the filter board I hear the "click" like the coin mech is engaged (at least that what I think it is)....At one point only 1 mech worked, then neither, now the other mech works!..so I cannot seems to have both mechas working at once!

Additionally I noticed I do not see any score information at the top of the screen..probably because of the jumbling...

If I put it in service mode I get some sort of jumbled message for a moment then the screen turns blue with nothing on it....

I've attached a photo of the top of the boardset..hoepfully it gives you what you are looking for!

 

[scamp]

Also...how do you know which rom is doing what? I mean you said maybe a graphics rom is swapped...from looking at the MAME romset it seems there are 20 roms for the game itself! How can you tell which roms are controlling what?

Thanks (trying to learn here as well!! )

 

[kstillin]

Well, the top little daughter board has graphics ROMS. The three ROMS in the lower left in your photo are for the sound/music.

The program ROMS are on that back board, I think. Some of the program ROMS also determine what graphics get displayed. I think if they were corrupt though, then the program wouldn't actually run.

You could still have some bad RAM or stuck addresss or data lines or almost anything.

If it were me, and if it weren't hot as hell where the game is, I'd play around with removing some of the graphics ROMS and firing up the game to see what change occurs. If you remove something and there is NO change, that would be a suspect chip.

Do you have a reader? That would allow you to confirm the chip contents.

 

[scamp]

Yes I actually just got my eprom burner today, so I could use that to read the roms and check them...not a bad idea...CDJUMP had just told me about WinROMIdent, which I could use to determine if the rom is bad by checking a database of known roms...

..this just might work!

Thanks!

 

[scamp]

I read,saved and verified all the roms on the board....KN60 was bad...replaced it, no difference..

I still think I have some harness issues too, since if I jiggle wires at the filter board I hear the coin solenoid click...also depending how I wiggle the wires the game could go back to the non-playable state...i need to locate the wiring diagram of the connectors on the filter board...

Any idea what size connectors there are on the filter board, as well as the jamma-looking edge connector on the side...I think I see wire crimping in my future,,,

I'm torn though..I may get another boardset to at least see things work and swap boards to narrow down the search for the problem...