Chicago, IL
Quoted from bridgeman:Newbie on electronic repair here, so I will apologize in advance for my ignorance.
I have a Jungle Lord that has been in storage a few years. I put in brand new pinpcb MPU, Driver and power supply board. Game won't boot and has a error code 9.
From my research it states that a code 9 "Coin-door closed, memory protect circuit faulty, or IC19 CMOS RAM Faulty". I guess I am assuming the memory protect circuit and CMOS RAM is okay, since these are brand new from pinpcb. It then tells me to check for coin door closed (or pin 1J4-1 or 1J3-1 is being grounded).
My question is how do I check these two things?
How do I confirm a pin is being grounded?
How do I check that coin door is closed? I know I can check the coin door by closing it, and I have, but is there wiring that could be bad telling the game its open?
Memory protect "error"
Leave the coin door OPEN
Turn game on then off and on rapidly game will boot next depress diagnostic should be ok no errors
Error code 9 will re appear when door is closed which actually means memory protect is functioning ok
It's when the coin door is open and there is a 9 that means there is an actual memory protect fault because it's stuck
also if there is a short in the wiring disconnect the 4 wire connector from the cpu that goes to the diagnostic switches This will simulate a OPEN coin door signal
