Thanks you very much for this "hard to find" service manual.
Will help a lot in repairing this receiver.
Text excerpt from page 137 (click to view)
5
6
7
8
� Each channel output in the digital signal (�� dB (there is no sound) ) input.
IC701 SurroundBack L out (pin 21) Is the output 2.5V fixing? Yes SurroundBack R out (pin 22) Is the output 2.5V fixing? Yes Center out (pin 23) Is the output 2.5V fixing? Yes LFE out (pin 24) Is the output 2.5V fixing? Yes Surround L out (pin 25) No
C A
No
Replace IC701
No
Replace IC701
B
No
Replace IC701
Replace IC701
Is the output 2.5V fixing? Yes
No
Replace IC701
Surround R out (pin 26)
D
Is the output 2.5V fixing? Yes Front L out (pin 27)
No
Replace IC701
Is the output 2.5V fixing? Yes Front R out (pin 28)