NAD T748 input problem

[Lynyrd]

Hello.
NAD T748 V1
Works fine, just one problem.
Analog Source one......no sound.
All auther sources works fine but the sound appears only after 10 seconds

That is, if I select an input, it appears on the display but the sound will only appear after 10 seconds. There is never any sound at analog input number 1.

Factory reset doesn't help.
Last firmware is installed.

Thanks


Service manual

https://acrobat.adobe.com/id/urn:aaid:sc:EU:7d422752-fb6b-45b5-aaa3-3ae30999865c

 

[Lynyrd]

Voltages On IC301

Pin 30.....+7v....ok
Pin 52......-7v ....ok

With oscilloscope on IC301
1khz square


Input analog 1
Pin 62......ok
Pin 63.......ok

Outputs Front L & R
Pin 21..... nothing
Pin 23....... nothing


Bad IC301 or other people?

 

[Lynyrd]

Any idea?

 

[Lynyrd]

in principle, it doesn’t matter to me that the analog input 1 doesn’t work, I’d just like to fix the sound delay by 10 seconds, do you think it’s a IC301 or bad capacitors or more?

Thanks