Crazy Kong sound issue

[PaulSwan]

Result!

[Belike]

Cool!

Now cut that old one out, desolder the remains, put in a socket in there and your ready for the next challenge; the graphic issue.. 

Yeah, and I'm scared to death from this job.

[CrazyKongFan]

Thanks for the info! I have a Falcon CK board (not Part 2) that has the same problem. The music, etc works, but the samples from the Crazy Climber ROM's don't play. I'm not home now to mess with it, but I'll try and pick up one of those LM3900's and piggyback it like Belike did and see if that fixes it

[CrazyKongFan]

Well, finally got around to looking at mine. Unfortunately, mine isn't as easy of a fix I was missing all the Crazy Climber sounds just like Belike. I picked up an LM3900N chip yesterday and piggybacked it on the old one, and got some of the CC sounds...except it's not the right ones. For example, when Kong is beating his chest, you get the high pitched 'yes' sound like when you grab the helicopter on CC. The coin-up (and spring bounce) sound is the mumbled "go for it" sound (from when you sit in one place too long on CC). Would the LS157 determine where it gets the sounds out of the EPROM, or would it be some other chip. I have no problem replacing chips, although it's a bit of a pain. I did get the old LM3900 out and soldered in the new one today.

[CrazyKongFan]

Woo-hoo, success! I was looking at the board again today and happened to notice the 2532/2732 solder jumper (to select a 2532 or 2732 EPROM) under #14 socket (mine has no #14 EPROM since it's not Crazy Kong part 2), and it looked different than the other 2 or 3 of those located on other sections of the board, so I assume it was set for a 2532, since the board uses 2732's and the rest of the EPROM's work. So I removed the solder bridge, and also remember seeing some regular CK board like that having the 2 sound EPROM's shifed one socket over (so #12 is empty, and #12 and #13 go in socket 13 and 14), so I moved #13 over to 14, with no sound, then moved #12 to 13 and lo and behold, I now have perfect sound!

[Belike]

Nice work, well done.
Seems like this sound issue is a typical problem with CK boards.

[baritonomarchetto]

Did you solved the graphic issue Bela? If not, check if you accidentally have broken / bended some pin on the ROMs/RAMs you reseated

[Belike]

Did you solved the graphic issue Bela? If not, check if you accidentally have broken / bended some pin on the ROMs/RAMs you reseated

Thanks Marco, it was some voltage problem, I tried it out in another jamma cab and it works fine.
Seems like there is some psu problem with my Nova Big Screen cab, the voltage could be set, but this pcb still shows garbage in the highest option.

[CrazyKongFan]

Crazy Kong seems to be really picky with voltages. That one I fixed with the bad sound, if I use a PC switcher, it has all sorts of graphical glitches. If I put it in my Gaplus cab (using a JAMMA cab adapter and Falcon pinout JAMMA adapter), it looks perfect. When I put it in my new cocktail, it sometimes glitches if the board gets flexed at all. I also have a Donkey King (CK bootleg) that also glitches depending on which power supply I use.