Yamaha NP 30 76 Key Lightweight Digital Grand Piano with Touch Response - Answered Questions & Fixed issues

I wrote up and photographed for my similar YDP, see solution 2 under this post:http://www.fixya.com/support/t8881187-1_key_not_spring

rubber contact strip requires replacement

Check Connections or Fuse !

What you're beng told is to reset the instrument. T/his is als refered to as reboot, or reinitalize. The instructions are at this link- Resetting Yamaha NP31 Portable Keyboard

The NP30 is no longer made. The new equivalent is the NP31. Price in the UK is listed at £ 274 most shop retail at £ 254.00 . http://www.beckettsmusic.co.uk/shop/scripts/prodView.asp?idproduct=10559

use wd 40 and a soft clothe apply on the sticky areas give it time and clean after .

There's an extremely comprehensive pair of videos about repairing this problem on YouTube thanks to David Allyn. I have embedded them below, or you can search "P70 Noisy Keyboard Repair".

cleaning the rubber pads under neat the keys should do the job .But do be care full not to use any cleaning agents or solutions .just wipe with a soft cloth.

The Korg SV188 has stunning realism in the Grand Piano arena. It uses a 12AX7 tube in the preamp output for that classic analog warmth lacking in so many garden market digital stage pianos these days. It has weighted hammer action and carries a price tag of $1,699.00 at American Musical Supply.com They even throw in a extra years coverage at no cost. The Yamaha MOXF6 88 key (same price) is another fine grand piano that wont disappointed but be prepared for a large learning curve learning all the rest of it functions, there are plenty to chose from. Roland wins hands down with its RD300nx, $1,799.00 and the RD700NX $2,699.00 simply the best digital stage pianos money can buy . Look up the specs at AMS

Yes it will work.

Your key contacts have gotten dirty. Two contacts per key are used to sense velocity and if one doesn't work the sound will be full velocity and loud.

The contacts are conductive rubber "pills" in silicone rubber domes that the key presses down onto circuit board traces under the keys. Clean both the "pills" and the black portion of the circuit board GENTLY using ONLY 99% isoprophyl alcohol and QTips. There is a lot of disassembly required and one has to keep track of where the screws go and length and thread type to re-assemble after cleaning. Also great care must be taken to not damage the ribbon cablles connecting the top and bottom halves of the case.

definitely - you have to match the voltage going in (AC) and out (DC) and check the polarity (+ or - on the plug).

use dc power supply

If you have cubic dollars to spend "B?sendorfer" makes a 92 and 97 key piano... These are NOT electronic but are stage Grand Pianos.

The key is to open the unit and find the exact point these are sticking. It is unlikely that vacuuming and blowing is going to improve the situation. Often the sticking is due to deformation of the case at the front draging the keys... This would be very obvious and I am sure you would have seen it and found this if it were the problem. It is not clear exactly which type of key mechanism is used here. I have several keyboard with various mechanisms. Some of the weighted ones are actually made by a single company and used by Yamaha, Korg, and several others. These are rather complex and probably not like yours. Others use a silicone rubber dome with conductive rubber contacts that press against circuit traces... for these, the restoring force is actually from the rubber dome. If the domes wear or deteriorate, then keys will not come back up. Yet another type uses a spring at the back end...M Audio uses this lightweight in some of their products.

In your case, I would look for a pivot point that might need lubricating. I was unable to find a service manual for the NP30 that would show the exact type key. I have several Yamaha keyboards that have several types of keys.

If the keys may be dragging on the side, clean with Q tips... and then you can wipe with a Q tip moistened with CRC226 available at Home Depot in the electrical dept. This is a safe lubricant for electrical uses.

Search Ebay completed items for same model or similar to see what they sell for at auction.

The key contacts are dirty... They are likely conductive rubber pills pressed onto traces on a circuit board. There will be two contacts per key to use for velocity sensing.

Disassemble and clean the black rubber pills that are usually in silicone rubber domes AND the corcuit board traces using ONLY 99% isoprophyl alcohol and QTips. 99% is a bot hard to find so look around for it.

You don't tell us the model, but most have a "demo" button which is first pressed and then there sometimes is a start and stop button tto control it.

Note that the volume of piano keys depends on the "key velocity" which is the speed that the key is depressed. This velocity is MEASURED by the time between closures of the two contacts associated with each key in this unit.

If some contacts have become dirty, then the volume of those keys will vary.

Clean the circuit board traces AND the conductive rubber "pills" using Q tips and ONLY 99% isoprophyl alcohol.

This involves dis-assembly of the unit and you may want to seek professional help with this if you are not electronically adept.

Try acetone or surgical alcohol