Have a HP 1700 Roland Digital Piano that has one key (first G to the right of middle C key) that is off.

Ch?o b?n, v?n ?? n?y c? kh? ??n gi?n, ??c bi?t ? Piano ?i?n hay c? tr?ng th?i n?y, b?n c? th? ghi l?i c?c ph?m b? m?t ?m thanh, sau ?? m? ?ai ?c ra, b?n d??i ??n c? n?t cao su b?n ch? c?n b?o v? c?i n?t ?? l? ???c.

https://guitardongtam.com/

On the rear of the piano there will be two 1/4" jacks labeled Output Left and Right. One will be labled Mono as well. If you are using a stereo amp, use both, and if a mono amp use just the mono output. If your amp is a guitar type, connect a shielded cable with 1/4" phone jacks such as you'd use with an electric guitar from these jacks to your amplifier. If you are useing a home stereo amp, you will need a cable with 1/4" phone jacks from the piano to RCA phono jacks on the amp end.

Sounds like what happens with mine -- the key weights broke. I have solved this by opening it up and stealing the weights from similar keys at the lowest or highest end of the keyboard. The keys pop off by messing with the back ends, and the weights just come right out. Not bad really. Opening the unit is just a matter of finding the right screws, there are 4 larger ones on the left and right undersides and 4 more small ones in the back. Intelligent hunting will find them. Good luck!

Yep... Roland pedals are reversed, that is, normally closed contacts. Unlike some Yamaha keyboards, the Casio doesn't have an inversion function available. You have two choices to solve this: 1. Buy a pedal with the corect sense 2. Open the Roland pedal and MAYBE with a soldering iron you can move a wire to select a contact with the opposite sense.

I have two Yamaha's and I will say they are maintainable. Almost ALL the weighted piano key models use a keyboard made by one company as I understand it. I can easily get service manuals for the Yamaha, not quite as easy for the Roland... same goes for repair parts. Your decision... listen to each and decide. Hint: Use a set of headphones to do the compparision rather than internal speakers as the orientation in a music store can drastically change the sound.

Here's a link to the Owner's Manual
for a service manual, you're probably going to have to contact Roland directly, since they don't even list the fp-8 on their website. Service manuals for their other products only run about five bucks for a hard copy, i believe. I'm sure you can get to the right place through here: http://www.rolandus.com/corporate/contact_us/

White spirit is NOT what you should use. Mineral spirit leaves a residue film.

Use 99% isoprophyl alcohol.

ALSO inspect the contactboard for cracks by candeling with bright light behind it.

The ROLAND pianos USUALLY require that you use a normally closed sustain pedal.

MANY pedals are the opposite and close when pressed. SOMETIMES you can open the pedal and reverse the way the switch works.

You may need to clean the contacts which are usually conductive rubber. I explained stuff for another Roland problem with two keys that were intermittent. I have an EP-7 that I had to do the cleaning of the key contacts. Use 91 or 99 % Isoprophyl alcohol to clean BOTH the conductive "pill" (Black under silicone rubber domes) AND the traces on the board where they press. Clean gently as the traces have a hard black coating.

It's not really for the faint of heart, but generally this is caused by gunk getting into the key circutry. Underlying the 3000's keyboard is a silicone pad with 2 contacts on it, the measurement between each being hit is the issue usually but yours just sounds like there's something in there causing a physical or contact obstruction.

What you really want to do is to remove the keys and clean everything but this isn't easy... You could try using 99% alcohol (from a pharmacy) to clean inside it which may well help you.

There's a good thread on a similar issue at:

http://www.electronicspoint.com/roland-hp-3000s-digital-piano-dodgy-note-t18946.html

Which may help you work out how to do the disassembly if you are brave, but I would start with pouring some alcohol in and poking it and hoping for the best 1st. It sounds crude, but it works amazingly well with some things.