Repair & Maintenance Log
08/21/09: Acquired game.
09/03/09: Replaced power cord.
01/15/12: Added remote battery backup. Instead of permanently soldering some sort of remote battery setup to the CPU board I made battery place-holders from 1/2 inch dowel. This method requires no board modifications. And no connectors are needed between the board and the battery pack. The battery pack is from Great Plains Electronics. I like that the pack is fully enclosed. I don't like that it has an integral ON/OFF switch. I set the switch to ON and put a blob of silicone caulk over it. The battery wires are mounted to an end of each dowel with a screw and crimp terminal. The screw head becomes the "battery terminal". Don't forget to account for the height of the screw head when figuring the length of the dowel. I wired the battery pack with 8' leads. Instead of placing the battery pack in the head, I drop it down into the body and place it next to the cash box. Opening the coin door is easier than opening the head. The idea is that I'll be better motivated to replace the batteries more often.
Battery place-holders and remote battery pack. Note the blob of silicone over the battery pack switch.
The CPU board shows how each battery must be oriented, but does not show the location of +4.5 volts. Before removing the old batteries I used my volt meter to confirm that the upper-right terminal of the battery holder is +4.5 volts.
Important: Grand Lizard is one (if not the only) System-11 game with the CPU board mounted "right-side-up". This is similar to the previous System-9 CPU boards. Any other System-11 will probably have its CPU board mounted "up-side-down". In that case +4.5 volts will be at the lower-left corner of the battery holder.
Dowel sticks in place.