Question about Yamaha P-155 Electronic Piano

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Yamaha P155 wont power up, replaced power supply w correct one. Any ideas?

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  • Yamaha Master
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Double check the supply... it should be a PA301 which is 16 volt DC at 3.5 amps... fairly hefty one.

Download these schematics:

http://elektrotanya.com/yamaha_psr-1500_3000_sm.pdf/download.html

and

http://elektrotanya.com/yamaha_p-120_s.pdf/download.html

A lot of Yamaha have similar circuits between different models.

When you go to these links, scroll down the page looking for a small link "Get Manual". They will only let you download two a day without registering.

The first of these has the power entry on page 154... the second is on page 60. Both use the 16 volt power adapter. See if one of these schematics is not close enough to your unit to troubleshoot it.

Posted on Mar 27, 2011

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http://www.beckettsmusic.co.uk/shop/scripts/prodView.asp?idproduct=17018

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