How do generate a signal (rising or falling edge) to switch

[xcpointx]

I have no idea what kind of signal to give this unit to get it to
switch. Im sure it will be an easy answer for any electronics
professional out there.

Its a guitar preamp (carvin Quad X), with old style 'midi' input jack
plugs

Here is the relevant part of the schematics:
http://www.crossingpoint.za.net/quadx/octopus/octo1.gif

and

http://www.crossingpoint.za.net/quadx/octopus/octo2.gif

the whole schematic is
http://www.crossingpoint.za.net/quadx/pre%20midi%20schematics/8400114_C_G_small.gif


Your help will really be appreciated.

Any advice?

 

[John Popelish]

xcpointx wrote:

I have no idea what kind of signal to give this unit to get it to
switch. Im sure it will be an easy answer for any electronics
professional out there.

Its a guitar preamp (carvin Quad X), with old style 'midi' input jack
plugs

Here is the relevant part of the schematics:
http://www.crossingpoint.za.net/quadx/octopus/octo1.gif

and

http://www.crossingpoint.za.net/quadx/octopus/octo2.gif

the whole schematic is
http://www.crossingpoint.za.net/quadx/pre%20midi%20schematics/8400114_C_G_small.gif

Your help will really be appreciated.

Any advice?

Any logic signal that swings about the amplitude of the V+ supply
should work. I would probably try a 4000 series CMOS gate or buffer.
What is the V+ voltage?

--
John Popelish