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Yamaha psr 70

I pluged the wrong adaptor into the keyboard and now it wont turn on what do i do to fix it?

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  • Contributor
  • 85 Answers

Talk w yr supplier
explain exactly what you have done

Posted on Oct 20, 2013

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Posted on Jan 02, 2017

SOURCE: No sound on Yamaha PSR-275

make sure its not in pc mode

Posted on Aug 23, 2008

  • 59 Answers

SOURCE: 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.
http://www.yamaha.co.jp/manual/english/result.php?div_code=emi
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.

Posted on Oct 14, 2008

dirinda89
  • 214 Answers

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

Hi,
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.

http://www.usersmanualguide.com/yamaha_audio/electronic_keyboards_(portatone_-_portasound)/psr-225gm

Posted on Mar 03, 2009

jyackle5
  • 8197 Answers

SOURCE: lost my keyboard user manual

You can get the manual on the link below.
http://www.usersmanualguide.com/yamaha_audio/electronic_keyboards_(portatone_-_portasound)/psr-70

Posted on Sep 12, 2011

bronk50
  • 27725 Answers

SOURCE: i have a yamaha psr 340 but no manual instructions can you help where to gey 1

http://office.manualsonline.com/manuals/device/computer_keyboard.html

keyboard maunuals

hope this heps

Posted on Nov 12, 2011

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2 Answers

Why doesn't the Yamaha psr-78 get any power using an adapter?


Check that the powr adapter is working and putting out the correct voltage.

Mar 22, 2015 | Yamaha Music

1 Answer

I have a yamaha psr s900 keyboard, the adapter is on and the green light is on but the keyboard is not turning on.


Have you measured the voltage and confirmed the polarity is correct? If yes to both of these then the problem is in the keyboard.

Can you get it to flicker / on off if you insert the adaptor plug and wiggle from side to side ( wiggle the plug - not you wiggle side to side ! )

If this makes an intermittent connection then you need to replace / refit the power socket. These have a habit of breaking the solder joint to the pcb.

Report back if this is not clear or you need further advice.

Feb 17, 2015 | Yamaha Music

1 Answer

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

My Yamaha psr-500 wont turn on. When I push the on button the speakers make a popping sound and when I hold the on button down I get static through the speakers along with 3 notes one after the other


Is this on mains or battery? This keyboard must be nearly 20 years old, it's done well! If you have batteries in but are using mains power, the power adaptor could have failed and not enough juice left in batteries to work. Try new batteries and try without any.

Aug 09, 2013 | Yamaha Music

1 Answer

Hi My yamaha PSR S500 keyboard is not turning on! I bought a new adaptor but it still wont come on


Check that your adapter is a 12VDC with a current rating of at least 1 amp (1000ma) AND that the center pin of the connector is the POSITIVE.

Feb 07, 2011 | Yamaha PSR-S500 Digital Keyboard

1 Answer

The keyboard is showing sign of power input but the screen is not lighting and produces no sound


1. Try the volume

2. Your adapter may not be the proper voltage/amperage. If the adapter has ratings listed, make sure they match the keyboards ratings.

3. Try it with the headphones. If they work and the speakers don't, you've narrowed down your problem. There may be some damage or wiring problem within where the board meets the speakers, and/or before processing.

4. Try it with batteries. If that works, you need a new adapter.

http://www.ioffer.com/i/adaptor-cord-yamaha-psr-or700-s500-s700-s900-arranger-113553507

Feb 06, 2011 | Yamaha PSR-S500 Digital Keyboard

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Do you have yamaha keyboard psr 2000 spare parts?


My keyboard yamaha psr2000,so I want parts silicone rubber keypad 61 and including electronic board,thank you.

Feb 12, 2010 | Yamaha Full-Size Keyboard

1 Answer

Yamaha PSR-280 : AC power instead of DC power


An answer, but likely not a solution. I believe all Yamaha PSR series keyboards use the same 12 VDC adaptor, so I looked at the electrical schematic for another model I have. There seems to be no fuse on the power input. There are two components shown on the positive and negative wires off the power socket, but the symbols do not look like anything I have seen for fuses - they may be resistors. Power goes directly to a 5 VDC voltage regulator, which powers all of the solid state componenents. Too much voltage of the wrong type could have easily ruined many of the sensitive components.

Your only hope is to check the power socket area for the possibility of having fuses. My drawing shows the power socket, voltage regulator, and audio power amplifier being on one circuit board. That may not actually be the way it is in your model.

Good luck!
(your English is fine)

Feb 23, 2009 | Yamaha Portable Keyboard with 61...

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