Question about Yamaha Full-Size Keyboard

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Hi I have a yamaha dgx 505 for about 5 years now. Suddenly after my kids practice yesterday there is no sound. It turns on fine screen comes on and shows the keys demo playing. But no sound. Could you give me a clue of what could be wrong?

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Posted on Jan 02, 2017

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SOURCE: YamahaDGX-220 YPG-225

Do a factory reset. First try pressing the + and - buttons simultaneously.

Look in your user manual for a complete factory reset and do that.

Posted on Jul 30, 2009

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SOURCE: yamaha psr 400 give an Er 1 message when

Wild guess of possibilities.

1. Internal backup battery exhausted.

2. Button OR key is stuck down, either mechanically or electrically.

Posted on Jan 06, 2010

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SOURCE: certain keys do not make a sound..

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

  • 3 Answers

SOURCE: Right half of lcd screen on yamaha DGX-620 screen

I have the same Problem since yesterday my granddoughter hit the keyboard too heavy. I have opened it (many screws...) but could not find any obvious reason. Nothing like a loose connector.

Posted on Jul 23, 2010

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http://usa.yamaha.com/products/musical-instruments/keyboards/digitalpianos/dgx_series/dgx-640_color_variation/

There is a an "output phones" to put the headphones into on page 17 of the manual here.

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I have the same Problem since yesterday my granddoughter hit the keyboard too heavy. I have opened it (many screws...) but could not find any obvious reason. Nothing like a loose connector.

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