Revenge From Mars
Bally, 1999You're currently viewing posts by Pinsider mrart2u.
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4B (and other strings/columns that use big PCBs like that) often suffer from cold solder joints. Remove PCB and inspect the solder on the header pins. Reflow solder as necessary. The IDC connector could also be bad. That's easy enough to replace with a new molex connector so there should really be no reason to solder a wire to the PCB.
The switch for the drop target assembly is an easy to find microswitch with a simple lever. You basically want it to activate the switch when the DT drops.
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