PCB Repair Logs Jungle King
Jungle King
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| Manufacturer | Taito |
|---|---|
| Year | 1982 |
| PCB Image | Reserved |
| Pin Out | Jungle King |
Repairer: Arcade King
Forum Thread: Jungle King PCB Repair
Jungle King Original Taito
Good thing with this board was the Bootlegs boards above were interchangeable with the original. I found the board which was faulty and turned out to be the bottom CPU board.
Problem: Screen was covered with 0s and other letters. Game was running and I could see tarzan in the background. all background and forground graphics were garbage.
Fix: Found a bad 74ls02 IC61 pin 6 was stuck low.
while most of the screen has cleared up there is a sting of D'd around the boarder of the screen. The title screen and other background graphics are still messed up but still a good start. I found the pair of chips that handle thse graphics. two 74ls374's. I was able to recreate the same graphics problems on the bootleg by shorting the input lines. I followed the traces back and found some tiny pieces of solder? metal something connecting two tracks. I removed the metal thought nothing of it really but when I fired up the PCB the graphics were 100%. lesson learned
This board suffers the same problems the bootleg did with not being able to coin. The reason for this taken from the manual.
The work around is simple and same as the bootleg. Traced back the coin circuit to a ls08 you will notice ive cut 2 pins on IC28 on the top board which puts the chip into a high state. Coin 1 and 2 work normally now with out that stupid pulse.
