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No sound on Yamaha PSR-275

The keyboard comes on but I have no sound & the volume is on max.

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  • mcsynthetic Jul 07, 2008

    When I turn my Yamaha PSR 225 on the inbuilt songs play, but when i press the keys they don't respond neither do they create any sound.

  • shykisses Aug 02, 2008

    No sound when I use batteries, and when I use the adapter there is a humming sound, but no music play.


1 Answer

Make sure its not in pc mode

Posted on Aug 23, 2008

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Yamaha psr 70

YAMAHA PSR-70 Keyboard - Lights On - No Sound
This may be the cause if the unit has not been powered up for a while; switched LEDs come on but fails to produce any sound from either or both channels:
Normally one would suspect faulty headphone switch jack or faulty LA4500 power output chips.

Most electrolytic capacitors can be slightly leaky (tens or hundreds ofkilo-ohms) after years of non-use.. They are re-polarized / reformed when equipment is switched on after aperiod of non-use and this effect would probably not be noticed since it make only takeseconds for all electrolytic capacitors to come up to specification...
In the circuit used for the Yamaha PSR-70(see the Sanyo Applications Notes for the LA4500)there is an 'anti-thump' / slow start capacitor (220uf 16V, aluminium electrolytic 'ripple filter' capacitor) connected between pin 9 and ground (of both LA4500 audio output chips in the PSR-70).Since these hold the chip in a power down condition, they cannot 'reform'from a near rail voltage normally present when the chip is turned on, due to lack of power and thus continually hold the amplifiers in a quiescent power down mode..
To remedy, they need to be disconnected and reformed with a 9Volt battery.After the Chips have powered up, there should then be about 90% of the rail voltage on their PIN 9...

They are not necessarily faulty, they just needs for the equipment to be powered up working for a minute (every year or so).Alternatively a4700 ohm(2m/A) resistor temporarily wired from the (9V) + rail(PIN 1) to PIN 9 of the LA 4500 may do the trick..
This reported fault may be very unusual or fairly common (these keyboards now being almost 30 years old...)

Hope this helps someone out - feedback will be appreciated

September 2014

Apr 23, 2014 | Computers & Internet

1 Answer

MIDI Basics

MIDI is the language used by electronic instruments to tell each other what to play. When you press a key on a musical keyboard this keyboard will send a MIDI message to a computer or a musical instrument connected. The message says something like: start playing this note at this volume. When you stop pressing the key a new message is sent which says: stop playing this note.
MIDI messages can be transmitted using MIDI cables or USB. Old instruments had MIDI ports (round with five connectors inside) so a computer had to have a MIDI interface. Nowadays it's almost all done with usb.
The important thing to remember is that a MIDI message (and a MIDI cable) are just an instruction to play, they don't contain sound. The sound you hear when you press a key comes from the computer or the instrument connected to the keyboard, not from the plastic key you have pressed.
There is a lot more to say, but I would suggest you check wikipedia first and then come back with more specific questions.

Nov 09, 2012 | Yamaha PSR-E433 61-key Keyboard, with...

1 Answer

My yamaha PSR-275 keyboard wont turn on

If the keyboard came with a setup disc try to install it using a friend's keyboard. Keyboard are very inexpensive I suggest for you to get another one.

Mar 26, 2012 | Computers & Internet

3 Answers

Need a Yamaha PSR-19 Manual?


You can find the manual here from Yamaha.

May 04, 2011 | Computers & Internet

1 Answer

I have a Yamaha PSR-260 and when I plug in the power cord the lights come on and it recognizes the different settings but there is no volumn.

did you try to plug in the headphones,? is there any sound from these.? do you hear any strange noise when this plug is plugged in and out.?? that socket might have a switch, to switch over from speakers to phones............

Mar 19, 2010 | Computers & Internet

1 Answer

I need a manual for a Yamaha PSR-225GM keyboard.

Here's a link where you can download your manual. Good luck & have fun with it! If this helps you plz rate this as 'fixa'. Thank you kindly.

Mar 03, 2009 | Computers & Internet

1 Answer

Yamaha psr-gx76

when i checked for a manual for your product it came up as musical keyboard not a computer keyboard so if it's the manaul to the muscial keyboard you want here is the link.
type in psr-gx76 into the search then it will show up in the results as pdf file, this is adobe file and will open with that program and most computers have it installed.
hope this helps.

Oct 14, 2008 | Yamaha Computers & Internet

1 Answer


i have yamaha psr 3000...
in my keyboard has some problem like system error...
when i switch on my keyboard this problem is arises...
please help me....

Apr 29, 2008 | Yamaha Computers & Internet

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