Bought this machine yesterday I noticed that when turning off machine and turning it back on it wasn't holding the high score so I put in a new battery pack checked the + and - wires they are connected in the right spot but still not holding the high score. And can only get one credit up at a time any help on this would be great thanks.
Raff
Go through and clear all the game memory. Step through the audits and high scores, and press the reset button on the MPU for each one.
Sometimes garbage data gets saved in RAM after turning it on with no battery, or after connecting a battery.
Quoted from ForceFlow:Check the voltage on the batteries and check to see if the voltage is reaching the RAM.
Ok voltage on the batteries are good around the 3.6 .And checked pin 22 on the ram that's Z22 chip on the board and there is power at pin 22 around 3.6 Dc voltage.
Have you confirmed if valid data is being stored in the 5101?
i.e. when you go through book-keeping mode, after clearing the audits and putting valid score reward levels at steps 7, 8, 9 and 10 (High Score to Date), if you then power off the machine for a minute then switch it back on, has everything been remembered in book-keeping mode or does it all contain junk (possibly the same previous junk before you cleared/set each step)?
Quoted from Raff:Ok voltage on the batteries are good around the 3.6 .And checked pin 22 on the ram that's Z22 chip on the board and there is power at pin 22 around 3.6 Dc voltage.
I presume you measured 3.6V at pin 22 of Z22 (5101) when the machine was off?
Quoted from Raff:When i power the machine off everything is lost .
Is all the audit data the same as the previous power-on? i.e. does the audit data seem to be stuck on the same values or are you getting random new values each time you power up and check the audits?
If replacing the 5101 doesn't fix it, you'll have to get a logic probe out and find out why the chip enable (pin 17) or read/write (pin 20) and/or other signals to the 5101 are not being activated.
Problem solved .Started with doing the ground mods to the mpu and driver board the power board was already done ,then i took the old 5101 chip out and noticed on the board that where pins 18 & 19 go that they are connected together on the same trace on the top of the board , so after putting in the new chip i tested all the traces to the leg of the chip the only trace that was not working was 18 , pin 18 & 19 are both connected to ground so i add a splash of solder across the two pins at the back of the board plugged it in went into book keeping mode cleared 1-10 Added new scores in 7,8 & 9 for free games and added a high score in 10 and game was working again with high scores and can add more than 1 game , so turning machine on and off now keeps high score no problems all fixed . I would say to anyone that has this problem first 2 things to do is ground mods on all boards and check pin 18 make sure there is ground there.
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Thanks to Quench for all your help and forceflow and boat.
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North Adelaide
Calgary, AB