How do i fix my expression pedal on my digitech rp80?does it need a spring underneath it??? or is it read by sensor????

Usually the manuf. have diodes used as protection against over voltage or adapter polarity issues. Try the correct adapter (sleeve and tip have specific voltage polarity...check for drawing denoting each) and if it fails to power the unit up, it's probably time for Digitech authorized repair.

Try a factory reset. This is the procedure
1. Press and hold the Store button while powering up the RP90.
2. When the display prompts you with FR, release the Store button.
3. Press and hold the Store button for 3 seconds until RS appears in the display and release. The Factory Reset procedure takes approximately 10 seconds.
4. Once the factory reset has finished you will need to calibrate the Expression Pedal.

You CANNOT use the Voodoo as it outputs DC voltage and the EX-7 requires an AC voltage and of 9 VAC and also 1.3 amps at that.

All DigiTech expression pedals use an optical system instead of potentiometers.

Either the light is broke, or the filter.

The filter protrudes from the bottom of the pedal, and is darker at the top and gradually fades to clear at the bottom. If this breaks off, then there's nothing to limit the amount of light to the optical system.

If it is the light, then you'll have to have it serviced by someone qualified to work on it. Your local music shop should be able to help you out.


Hope that helps!

Btw, I’m available to help over the phone in case u need at https://www.6ya.com/expert/cameron_463100ffd54b591d

Here is the link to your manual if you don't have one:ftp://ftp.digitech.com/pub/PDFs/Manuals/RP90/RP90Manual18_0490_A.pdf Page 34 tells you how and don't forget to calibrate the expression pedal. Page 35 tells you how. Hope this helped.

Well i hope the latching mechanism isn't busted!

Check/review your parameter settings for your programs. Especially in the Expression Pedal Control areas.

From their site:

--Harmony Footswitch
This footswitch turns the harmonies on or off. While multiple harmonies can be selected within a preset, the HARMONY footswitch activates or deactivates any selected harmonies simultaneously.
When the LED above the HARMONY footswitch is illuminated, the harmonies are on. When the LED is turned off, the harmonies are turned off.

--Note: The settings for FX Footswitch Control, Harmony Footswitch Control and Guitar Sensitivity apply to ALL presets. The setting for the Expression Pedal Control applies to the current preset only. If you modify the Expression Pedal setting and wish to store it you must Store the preset (see page 11 ). When you load another preset, its setting for Expression Pedal Control will take effect.

--To perform a Factory Reset procedure
If you are editing a preset, press the Up or Down footswitch to exit edit mode.
Press and hold the Major/Minor button and then press and release the Store button. The display will read FAC RESET- WILL ERASE ALL YOUR PRESETS... , then STORE=RST.
Press the Store button again to continue with the factory reset. If you don’t want to do the factory reset, just wait 5 seconds, or press almost any other button, to cancel.

Here is a link with a source for the manual on the right of the page:http://www.digitech.com/products/Bass/bp200.php Further information can be found at support at the top of the page.

If you are getting no display after you try powering up properly check the plug end of the power supply with the supply plugged in with a volt/ohm meter. You should get a reading of 9volts. If you don't ,your power supply is not working. Sometimes the wire breaks where it goes into the supply and sometimes where it goes into the plug. Your power supply jack may be broken where it is soldered to the circuit board. If the unit has power you can do a factory reset. The procedure is on page 34 and 35 of the owners manual that you can download for free here:ftp://ftp.digitech.com/pub/PDFs/Manuals/RP90/RP90Manual18_0490_A.pdf Let me know if this helps.

Try contacting their service center rep at (801)566-8800. They might send you a schematic for the pedal if you explain your situation. They do recommend using the original power supply PS0912 which should still be available. Hope this helps.

Same thing happened to me but i didn't drop the pedal.Try to recalibrate the pedal cause mine worked after that.Look in the Owner's Manual at the recalibration section.Hope this will work for you.Good luck with it!