D-unit cof42_AT_embarqmail.com wrote in message
...

"N Cook" wrote in message
...
More a question of what is normal with these. ?
Probably an elcap problem, repaired . Its out of the box so the normal
footswitch action is replaced for testing with just a wire touched to
ground.
As this one stands, then about 0.2 seconds of contact is required for
the
flipflop action to change latch action - is that normal. ?

I would think not. It should be instant.

Any less and it just momentarily flicks to the opposite state but
reverts.
Also is the "hold" mode not-hold, ie the box is only on for the duration
of
the footswitch being pressed and off on removal of foot,

This IS normal.

I have an old DD-2

db



in the other mode
ppositions long,medium and short delay then latched, divide by 2,
footswitch
action.

--
Diverse Devices, Southampton, England
electronic hints and repair briefs , schematics/manuals list on
http://home.graffiti.net/diverse:graffiti.net/








The dd2 has a dedicated flipflop to do this but this dd3 seems to just use 2
of the 4 sections of a 74HC00 to act as a buffer to doubly invert and
nothing more, and then that signal goes to a pin on the main micro with any
de-bounce/divide by 2 function built in there, it would seem.
I've only done partial circuit tracing so that may be wrong.