Yamaha RX-A3010 - Loosing speakers sometimes.

[Trollet]

Since a couple of days there seems to have appeared a problem.
When powering on, relay clicks on (after a while as usual) but speaker setup-icons are gone.
Sometimes they pop up shortly several times with a pops in speakers, just like the decoder can't decide what to do
Switching to other program doesn't help except when I switch to Pure direct.
Then icons appear, and when switching back to another program they remain there. It does not change depending on input.

When I checked there were no error codes, and other data looked OK.
The only thing was the soundcheck, putting out a 1khz tone, didn't work, but speaker icons wasn't active then either.
After testing I powered on and it worked as usual

Does anyone have a clue what's going on ?


Regards

Figge

 

[JonSnell Electronic]

Check power supply 5v digital supply and 3v digital supply for low or noisy voltage.

 

[Trollet]

Thank's Jon, I will check that.
Seems that printing the schematic is a good idea. It's not easy to follow when pages doesn't harmonize in the PDF, and it's not the simplest one I've seen either

Anyway, it will take a while because I'm knocked out by the flu, so there will be no somersaults in the next few days


Best regards

Figge

 

[Trollet]

Well, without bigger efforts I have noticed that speakers are dead every time it's powered on.
After a few minutes it can be tricked to turn on speakers by switching source or push pure direct.

So I guess there's a cold soldering somewhere

Figge

 

[Trollet]

Talked to a Yamaha service technician yesterday.
He was almost certain that it was DSP 1 pcb that was the problem.
The other, DSP 2 pcb is no longer available. It better be the DSP 1 then....

Figge