Ibanez Compressor Pedal CP10 Repair

Mysteriously, this pedal just went mute while playing.  Can the Unbrokenstring Crew get it going again?

I find this to be a unique design.  But I cannot help but think that the assumption was made that everyone uses their right foot to run the pedal.  Using your left foot is a little awkward.

 

Let’s make a quick tour of the unit.  The pointers on these molded knobs are actually easy to see when the unit is on the floor.  The LED indicates that the unit is in circuit and active.

 

Pushing this little tab out allows the pedal pad to open.

 

The 9v battery goes here.  This switch is actually soldered to a small circuit board underneath.

 

Removing the bottom cover exposes the circuit board.  The black shiny sheet in the middle is an insulator.

 

The circuit board tips out like this.  But, there’s more!

 

The controls are located on a smaller circuit board underneath.  Out it comes!

 

These bushings align the shafts of the controls in the holes.  They just push in like grommets.

 

Now we can get to everything.  The switch itself is left installed in the housing.

 

Troubleshooting begins, using my massive Marshall Stack as an output indicator.

 

The signal is traced to here.  And then the signal disappears.  Can you see it?  I can’t either.

 

This capacitor is open-circuit.  No signal shall pass this way again.

 

Here is a replacement.

 

The replacement goes here.

 

The new cap is soldered in and the flux is cleaned away from the board.  Because I’m OCD like that.

 

Everything is working again.  We’ll put this unit back together and do a final test!

 

This looks no different than the first picture.  Except, this one works.

Thanks for reading all the way to the end!

CONTACT – David Latchaw EE
281-636-8626

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