Question about Yamaha Full-Size Keyboard
G , C sharp keys on left side of keyboard are silent, do not make a sound when depressed. Yamaha DGX-500
The wire from pin 1 or 7 of CN1 on the GHL88L (left end) circuit board is open where it goes to the middle circuit board. This could be a bad cable, improperly seated cable connector, or a crack in the circuit board(s) connecting to these wires. These are the common matrix wires associated with only the C# and G keys for the left 1/3 of the keys. If more than 1/3 is dead, then the problem is likely on the middle board GHL88M that connects to the mating cable to the CN1 connector.
There are two wires dedicated to the keys for the two contacts that are used to measure velocity of the key strokes. There is a mechanical position between closing the contacts and the time is measured by the processor as velocity.
If you are the least bit worried about working on electronics you best have a service person do the repair. The keyboard has to be lifted out after removing the top and disconnecting other cables.
Posted on May 03, 2010
I have a psr630 keyboard,and some of the keys are dead.solution please.
Posted on Oct 28, 2013
Save hours of searching online or wasting money on unnecessary repairs by talking to a 6YA Expert who can help you resolve this issue over the phone in a minute or two.
Best thing about this new service is that you are never placed on hold and get to talk to real repairmen in the US.
Here's a link to this great service
Posted on Jan 02, 2017
Tips for a great answer:
Oct 26, 2017 | Yamaha Music
Dec 25, 2015 | HQRP AC Adapter / Power Supply for Yamaha...
Apr 03, 2014 | Yamaha DGX640 Music Keyboard
Mar 20, 2012 | Yamaha Music
Apr 13, 2011 | Yamaha Dgx203 76Key Portable Keyboard
Feb 06, 2011 | HQRP AC Adapter / Power Supply for Yamaha...
Dec 06, 2010 | Yamaha Full-Size Keyboard
Jul 29, 2009 | Yamaha Full-Size Keyboard
Apr 20, 2009 | Yamaha Music
Jun 05, 2018 | Yamaha Full-Size Keyboard
Jun 20, 2014 | Yamaha Full-Size Keyboard
500 people viewed this question
Usually answered in minutes!
Step 2: Please assign your manual to a product: