Posted By
MMS
on 2020-06-14
04:38:31
 |  Re: Information about PCB difference, revisions of IC, historics
Exacly. Although ESD point of view the on and off condition does not count, the joystick ports are more often touched than IEC, and kids frequently swapped joystick ports when the machine is in ON condition. Protecting TED from this possible effect (especailly as joystick ports directly driven by TED) could be more important, than the IEC port.
Solder made a TED protector circuit for that, but that diagrma seems to be lost. The PCB that may protect the joystick ports from ESD is linked beforehand, that is based on Levente's design. I do not know, if Solder's and Levente's design is similar or a completely different approach.
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