Hi, i purchased yamaha fc15 sustain pedal yesterday. when i connected this pedal to my Roland E-09 keyboard through foot switch port, it activate Start/Stop button ( of arranger & song controls ) and starts the rhythm. i want it as a damper/sustain pedal of piano. i want to know if it works with Roland model and how to use it if it works. Thanks in advance. sorry for my poor English Roshan

First you need to make sure that the keyboard is programmed to accept the DP-10 as factory default and then that the DP-10 is working perfectly. There is a case where the DP-10 action switch is activated directly, in this case the sustain does not stop and you need to change the micro switch of the DP-10 pedal. It has already happened to me and I replace it by adapting another micro because Roland does not support you and wants you to buy another DP-10.

Check and see if there is a switch on the foot pedal. Check the P-90 menu under footswitch to make sure it is set to sustain.

Buy sustain pedal made for CASIO or switable model.
Pedal for Yamaha or Roland will work in reverse on a Casio.
If you cannot return for exchange, then open up and solder a different type of micro switch.

every sustain pedal got different polarity.. normally just go to global setting on your keyboard and change damper polarity setting to plus or minus (select which one work with your sustain padle).

Sorry, but the Yamaha pedal has the opposite sense (it is a normally open contact) than what is REQUIRED by Roland equipment. Roland requires a Normally Closed contact. Unfortunately, one is confused because the Roland jack for the sustain shorts itself to no sustain when you unplug a pedal. SOMETIMES one can open a pedal and with soldering iron change a wire to reverse the pedal sense IF the particular pedal has both contacts available.

Sorry, but Roland uses the opposite sense switch. They use normally closed where Casio requires normally open contacts. SOMETIMES one can rewire the pedal internally, but you have to be mechanically and electrically inclined to do that.

This is confusing... you say "the sustain works when you disconnect the cord"? How can that happen? and doesn't work when it is plugged in.

MOST sustain pedal problems are due to people using a different pedal than the keyboard is designed to use. It is very common that someone tries to use a Roland sustain pedal on a Yamaha and oof course it doesn't work because the Roland pedal is normally closed and Yamaha usually requires a normally open contact.

A FEW keyboards now check the state of the pedal input when power is first turned on and configure the pedal polarity accordingly. For these keyboards, make sure the pedal is plugged in before power is turned on.

You may have a pedal that is ROLAND compatible which is OPPOSITE sense from what the Yamaha requires. The Yamaha takes a NORMALLY OPEN contact.

Some Yamaha keyboards such as TYROS have a parameter that you can set to permit using either type pedal.

Some pedals have a switch to change them to use with either type keyboards.

You may be trying to use this with a Roland synth... they require the OPPOSITE type switch.

If you have a Yamaha higher end product such as Tyros, there is a setup screen in the utility menus to set the polarity of the sustain and other inputs and that setting may be wrong.

The sustain pedals have only two wires. Usually they terminate in a 1/4 inch mono plug.

yamaha USUALLY sustains when switch is closed. Roland usually sustains on a switch between the wires when the switch is open.

NO POWER should be supplied BY the sustain pedal... it is ONLY a switch.