I got the unit back from service center just now and they gave me in almost dead condition. At least when I gave it to them everything was working I was getting only 1 error on screen 'sometimes'. But I was able to use it and every feature was working.
Sony people tried to repair it and in the process they killed the whole unit. Now it is completely dead. It's is piece of garbage now. Nothing is working except the lights on front. No sound output to speakers, USB not working, Video out dead, Bluetooth dead, DVD Rom dead (Tray is not even ejecting out),FM/AM dead, Aux dead
I asked lot of question to Sony engineer he didn't know what crossover is, why there are double wires for sub-woofer, don't know real RMS, etc basically they don't know poop.
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Anyways,
Please check some photos of inside of AVR and maybe then you can tell the right configuration in this music system like if amp, crossover, etc are inside AVR or not :
Photos from all angles in detail. Link :
INSIDE OF AVR
* Also if you need photo of specific component, please let me know