Yamaha DSP-A2070 does NOTHING

[r0b]

Hi,

I recently purchased a cheap Yamaha DSP-A2070, which I'd like to use as a multichannel amp (4ch) for an active project.

Sadly it does exactly nothing when I try to turn it on. No Light, no click. zilch!

What I did already is to resolder the complete aux power board (the one where AC comes in) and changed the big cap on this board (1000µF 25V, C104 I think).

However it still does nothing.

I think I measured 12v going from the aux board to the IC board. Also, when I bridge the AC from the aux board to go to the main transformer (not AC at main transformer othwerwise), the lights turn on, but no text on display or anything else.

Anybody got any ideas?

Serivce Manual available on Hifi Engine:
Yamaha DSP-A2070 - Manual - Audio Video Amplifier - HiFi Engine

Have a nice sunday,

rob

 

[r0b]

I did fint this one here on the site Faulty Yamaha DSP-A2070, but it didn't really help me ...

anyone?

Cheers,

rob

 

[Trollet]

Hi Rob.
Have you tested self diagnostics ?
You can start up in failsafe mode and see what you get.
But it won't help if there's something with the PSU that won't let it power up.

Figge