Hello Gurus, please i need your help on a Yamaha PSR S775 keyboard with sound its speakers BUT NO SOUND FROM OUTPUT JACKS & HEADPHONE JACK PORT.
Attached are few pictures of the sound section on the mainboard.
Please kindly advise what component(s) could be replaced.
Thabk you for your expertise advise on this
Possibly the AJACK board has a problem. I would change that first. Part ZP451401. About $53 + shipping from yamaha24x7.com
try this trouble shooting first.
Then try the factory reset.
Last, see if the jack has a broken or dry solder connection.
I am pretty sure there is a menu option to disable various outputs
As pointed out, there is a Global Setting to Mute the Outputs & Headphones. If this does not work, the DAC (Digital to Analogue Converter) is the only component that the Outputs & Headphone have in common, but that the speakers do not use. This component is IC807 - AK4396 surface mount component on the DMM PCB. Before the HP DAC, the digital signal splits off to a separate Speaker DAC (still working); after the HP DAC, the signal splits to two separate Op-Amps - one for Headphones and the other for the Outputs (neither working). Good luck.
I believe the AJack is actively okay. Thebissue should be from the board.
Thanks for this. But didn’t suffice still.
Thanks a lot.
I did check this, still same situation.
Thanks a lot.
I will give it a careful approach. This should work as its so close to my assumption but i didnt want to attempt first until i see a clarification on it.
Thanks I’m so grateful.
BTW - did you try Factory Reset !?
No, but doesn’t seems to me like a solution for it. Due to the motherboard readings.
Thanks i did something around this and change few other components. It’s now working fine.