Sony STR-DH520 no optical input

[alfatv]

Hi guys,
This is my own (actually present to gf) amp which I am not even using so much.
Recently started to use optical input from TV which worked great.
However recently the link went down.
Few days ago I opened it up, cleaned PCBs from dust, then came back to life.
But today it did the same thing again.
On TV when I change setting from speakers to just optical and other way around, audio comes up only for very short moment.
There are 2 optical inputs, both behave same way.
I found schematic which is attached.
I hope this forum experts can point in right direction, thanks.

[jons]

Re: Sony STR-DH520 no optical input

Either that digital input receiver IC is dying or there's some cold solders on that input board would be my first guess.

[Devil_rider]

Re: Sony STR-DH520 no optical input

Any other optical source or Amp to test the TV also? The fact that it works when you change settings on TV would make me look at TV first.

[alfatv]

Re: Sony STR-DH520 no optical input

Working again right now.
It was the same problem with another TV and with another optical input of the amp.

[Devil_rider]

Re: Sony STR-DH520 no optical input

All digital inputs are going to digital interface ic 2006. Check the power for noise/ ripple and you probably did that but reseat connectors on digital board to main board.