Yamaha keyboard PSR-230 will not come out standby

[Joseph67]

Our Yamaha keyboard PSR-230 has been stored for some years in the attic and now that my grandson is into music playing we got it down only to find that it does not produce any sound from the speakers any more and it was a-OK when stored. When running the DEMO we can see the music playing on the LED's above the key's but in silence. I managed to find a service doc and see that I have 0 volts at pin 5 (STBY)from the power amplifier (LA4705) module.The ON signal is supposed to be a "PCo" from IC100 (GEW10) pin 18 & 55. I don't see any electrolytic capacitors with a "dome" head in the path as I sort of would suspect that this could happen after the long time not powering it up. I find it hard to believe that the signal from pins 18 and 55 from IC100 would go wrong and I can only measure with a scope on connectors CN400 and CN911 that it is 0 volts. As the IC100 is on the underside of the PCB I can not measure directly on the pins of the IC. Anny suggestion will be highly apreciated. Cheers

[stj]

Re: Yamaha keyboard PSR-230 will not come out standby

upload the manual

[Anders Christensen]

Here is the schematic from the PSR-220/230 service manual

[R_J]

Have you tried a Master Reset?
To perform a factory reset on a Yamaha PSR-230 keyboard, you can do the following:

1. Turn off the keyboard
2. While holding down the [+] and [-] buttons, turn the power on
3. Release the [+] and [-] buttons when the top of the screen displays "Clr All!"

Here is the Yamaha link PSR230 Factory Reset procedure (yamaha.com)

Also check:
If your Yamaha PSR-230 is not producing sound, you can try these steps:

• Check the headphone jack: Make sure nothing is connected to the headphone jack.
• Check the speaker setting: Ensure the speaker setting is set to "Normal" or "ON".
• Check the master volume: Make sure the master volume is not set too low.
• Check the foot pedal/foot switch: Ensure the foot pedal/foot switch is connected to the SUSTAIN jack.
• Check the LOCAL CONTROL setting: Depending on the model, the LOCAL CONTROL setting may need to be turned on. This setting is usually found in the MIDI settings section of the owner's manual.
• Reset the piano: Try resetting the piano or keyboard back to factory settings. This operation may delete the backup settings and data saved in the instrument's user memory.