Hi,I have FBX longboard pedal.One switch is broken,so I need to know the type of switch to buy the right one...second problem I have is,that the wah pedal does not work,it switches on/off,but does not change the value,so I need to know the name of a component that drives the value of wah(expression)pedal...thank you :)

First thing is to verify that the in and out cable are to the correct side. These units will bypass in the wrong direction so the fact they pass when off does not guarantee they are cabled correctely. Other problems can include broken solder at the in or out connector. Dos the indicator light come on?

First thing to ty is to try it using two 9 volt batteries as a test to see if lights work.

I ASSUME that you are NOT trying to use the pedal in the external effects loop (send and return) as the levels are not compatible. The pedal must be between the guitar and the inout of the amp.

Beyond this I would open the unit and look for something loose or broken where the blue LED is located.

Check the switch itself... they OFTEN get broken mechanically... far more than the electronics failure. Use an ohmmeter to check the switch. Second most common failure is in the power adapters or use of the wrong adapter.

The switch has probably failed mechanically. You will need to replace the switch.

Do you use the zoom-G1X? Try this:

source: Zoom G1x User Manual.

You are apparently talking about an FX pedal with a built in wah function. Which pedal and model number? The Digitech RP350 for instance has a special procedure for initializing and recalibrating the pedal. Is that the problem or is it maybe the opto isolator ?

Suspect that the circuit board may have cracked in the vicinity of the power jack. Also check for a switch under the pedal. SOme have them and it might be broken.

I have this exact pedal. The sound should change as soon as you start pressing it down. With a wah, the frequencies are low at the heel down position and steadily change to a treble higher sound when in the toe-down position. Does the LED on the right side of the pedal come on when you press down? Are you using a fresh battery or a power supply with enough current? Is the "loudness" knob effecting the tone when turned up? If the answer to all of these questions is yes...then I would return it for a new one or send it to Morley for repair. They are nice sounding pedals. The problem could ultimately lie in the optical sensor that controls the wah effect.

You will have to recalibrate your pedal. If you don't have your manual anymore try going to www.digitech.com. The procedure for the RP350 so that you don't lose your presets is : 1. Press and hold the UP/DOWN Footswitches until PDLCAL appears in the display (BYPASS,TUNER and EXIT will be displayed before PDLCAL is accessed after about 5 seconds). 2. When the display prompts you with TOEDN, rock the EXPESSION PEDAL forward (toe down) and press either FOOTSWITCH.
3. When the Display prompts you with TOE UP, rock the EXPRESSION PEDAL back (toe up ) and press either FOOTSWITCH.
4. The Display now prompts you to calibrate the V-Switch sensitivity (VSWxxx), where xxx is the current V-switch threshold. Rock the EXPRESSION PEDAL forward and press firmly on the toe once to turn the V-switch on (WAH ON) and again to turn the V-switch off (WAH OFF).
5. If the V-switch is too sensitive, press the right UP FOOTSWITCH to raise the threshold (range is 0-2000. Keep testing the V-switch sensitivity and adjust the threshold until it only engages when you want it to ( too sensitive a setting will lead to the V-switch falsely triggering on or off when using the Expression Pedal).
6.When the V-switch sensitivity is set to your satisfaction, press both UP/DOWN FOOTSWITCHES simultaneously to exit. NOTE: IF the DISPLAY shows ERROR, an error has occurred and steps 2 through 5 should be repeated. Sorry fo the caps but thats how the instructions appear in my sons manual. You can also dowload the manual and an editor librarian (for the 350 at least) at their site. They might even have an update for your pedal. Hope this helps. Keep playing.

Personally, I like to have all "tone effects", such as wahs, distortions and equalizers in front of "time effects" such as phasers, chorus, flangers and delays. See my set up in the photo. Guitar input is from right to left, starting with the wah pedal.
Tom, 30yr player