On 03/02/2016 05:18 PM, Michał Pleban wrote: > Hello! > > firstname.lastname@example.org wrote: > >> If you have valid schematics at hand, please check if those are only capacitors there. There might be other elements like Rs, FBs, ... Checking all of them under highly magnifying glass could sometimes reveal the cause too. I had a situation when an FB was seemingly intact but was in fact mechanically broken. When measuring, the pressure caused the problem to disappear but it became apparent when perusing under magnification and differently applied pressure. > > The schematic shows a box labeled "EMI", I don't know what that might be? Take a look at http://www.zimmers.net/anonftp/pub/cbm/schematics/computers/plus4/c16-251788-2of3-left.gif and then at the Joystick port pin 8 on both ports. Those are essentially a circuit of 2 coils and one capacitor to GND. They look about like a capacitor with 3 pins from the outside. Gerrit Message was sent through the cbm-hackers mailing listReceived on 2016-03-02 17:00:58
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