Every function on this pedal works properly. Except, the user cannot select menu functions without a lot of hassle. And, the delay time can only be increased, not decreased. Can the Unbrokenstring Crew decode the mystery and make this unit a little less of a pain in the rear to use again?
The unit turns on and works, but the delay time knob only increments. This makes it almost impossible to select any function or mode unless the user spins the knob all the way around to wrap back to the beginning of the menu. And there is, like, three hundred menu items.
Interestingly, this little crescent moon-shaped piece is a bushing that makes a small hole out of a large one. This may have been a design feature for another model of pedal, or, more likely, the result of an engineering change. Or, my favorite theory, a design screw-up.
Back in the early days of electronics, stiffened cardboard was coated with wax to make insulating sheets called ‘fish paper.’ Nowadays, we have synthetic equivalents. This insulating sheet separates the two circuit boards.
These other controls are more conventional in their mounting scheme. Those hex drive screws are for looks, and only hold the bezel down on the top of the pedal enclosure. We don’t have to mess with them today.
We already have a pretty good idea that the rotary encoder for the delay function is not working properly. To verify that, the unit is partially reassembled for electrical test. The cardboard is more insulating material to keep everything from shorting out. Kinda like home-made fish paper.
The unit is running and the oscilloscope can tell us if the two phases of signal are coming from the rotary encoder. The answer is, one phase is missing. Thus, the rotary encoder can only appear to electrically ‘spin’ in one direction.
The new rotary encoder is installed, as shown. This rotary encoder also has a built-in momentary switch that is actuated when the shaft is pushed down towards the circuit board. Or, in use, when your foot taps the knob while playing.
The bottom assembly goes here, with the requisite white cables. Don’t forget to re-install the little crescent-moon-shaped piece where the connectors poke through the back panel. I did, the first time. Oh, yeah, and the metal shield, too.
Many of the Boss pedals use this barrel connector for power. The shell of the pedal housing slide into the slots molded in the connector to firmly hold the power connector in place. Note that not all barrel connectors have these slots. If you ever replace a Boss pedal power connector, verify that the replacement part has the slots.
This is a little better shot that shows the proper orientation of the shield plate. The little sharp fingers around the outside edge should point away from the middle of the pedal, so that they can ‘bite’ into the pedal housing.
Thanks for reading all the way to the end!
CONTACT – David Latchaw EE