BurgerTime (Midway) PCB repairs
Tools: schematics, logic probe, soldering iron, solder wick, multimeter
Problem: Board stays in Service Mode
The game appears to come up in service mode, displaying "MAPING OK"
on the screen. Dip-switch 1, #5 has no effect. The input on IC-15C, pin 6 remains high even
when the dip setting is on, which should ground the input making it low. After removing
the switch, verifying it was working and reinstalling the switch there was no change.
The next step was removing IC-15C and installing a socket. This allowed testing that
the switch really was grounding pin 6, it was. Replacing the chip with a new one
solved the problem.
Solution: Replaced 74LS367 at location IC-15C
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