keyboard Contrast display

by Sandy
(California)

The LED display has suddenly gone very faint after I was testing the Split and Dual functions. I have adjusted the contrast button on the back of the unit to the darkest setting and it is still very faint. Any suggestions?

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Mar 23, 2010
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by: Sandy

Hello:

I tried using a new adapter and had the same display issues. I contacted the Yamaha Store. I had great customer service. The gentleman got back to me and said I could bring it in and they would be sending it out for service. It could be fixed. I also searched the Internet and found a place here locally that said they could come out to the house and replace the part. The part would cost $175.

I've decided to do nothing. It's just not that big of a deal.

Thanks to all of you for your advice.

S

Jan 06, 2010
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Keyboard Display Contrast
by: Alfred

Dear Sandy: Thanks for message. Glad to learn you are playing your keyboard again, and I hope a new Adaptor solves the problem once and for all.
I'm a relatively new member of this Forum, but have had more years of hands-on (no formal education)electronics experience than I care to admit, and I derive a great deal of satisfaction when I can help others. Continued good luck to you, and don't forget to post another message after the new Adaptor arrives. Thanks.

Jan 06, 2010
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Thank you all for your suggestions!
by: Sandy

Hello:

I am so amazed at the response to my question. While I have had the keyboard for several years, I have only now started really being interested in playing it.

I am so hoping that the problem is the adapter. I have tried some of the tests on it and there is a difference in the strength of the display after I have 'charged' the adapter by only plugging it into the wall - - not the unit, itself. It will fade, soon after, but for a few moments, the contrast is as it should be. The sound of the instrument has not been affected.

Based on other comments I have read, I realized the importance of ordering a Yamaha adapter. One is on its way and I will input my comments as soon as I try it out.

Again, thank you all for your support! Happy New Year!

Jan 06, 2010
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Keyboard Display Contrast
by: Anonymous

Dear Sandy: Overnigtht thoughts (FIY). 1) The Contrast Control is probaqbly a Pot, or a Slide Resistor which can be worn out. 2) Internal Circuit Components can sometimes change value when they warm up. These are possibilities NOT FOR DIY REPAIR, only to alert you to any statements made by any (qualifdied) technician who may enter into the picture. Take care.

Jan 05, 2010
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Display Contrast
by: Alfred

Dear Sandy: When testing.be sure you leave the Adaptor plugged into a Wall outlet for a sufficient time to warm (Heat) up so that its Sedondary output Winding starts to fail (if it does). Good luck.

Jan 05, 2010
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by: Sandy

Hello:

Thank you for your suggestion. I notice that the display is full on when I initially start the keyboard and then it begins to fade, so you are probably right about the adapter. I'll get it checked out and let you know

Jan 05, 2010
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Keyboard Display Contrast
by: Alfred

Dear Sandy; One REMOTE POSSIBILITY is weak Batteries or low amperage output from the Adaptor.
Try new batteries or check the Adaptor's amperage.
Adaptor amperage is a PITA to check you can
have an elecrtrician do it, or simply replace it. Also be sure the battery terminals in the compartment are clean; or, make sure the Adaptor Plug is clean.
Another thought is to Initialize the unit. This sometimes surprisingly solves the problem.
Whatever the action you take, please post a follow-up message in this Forum, so we can all benefit from your experience. Thanks, and good luck for 2010.


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