Boss Slow Gear SG1 switch issue

[pontiacpete]

The switch on this pedal is not staying engaged. The effect works when holding the switch down. I think this is like other boss pedals, the switch is momentary, right?
Does anyone have an idea what might be causing this?
thanks

[g1]

Are you by chance just going by the light? If so, see note at bottom of schematic attached. Otherwise, electronic latching is done by the circuit in the Q7/Q8 area also shown at bottom of schem. page.

[DrGonz78]

As far as I know they refer to this as a flip flop circuit. So you can visualize what is happening.

[loudthud]

See the notes at the bottom of the schematic page about updates to the flip-flop circuit.

[pontiacpete]

Thanks for the help. I did the revisions on the schematic and the LED is now staying on. I didn’t have 220pf caps so I put in the closest that I have, 250PF.