Awesome manual. Complete diagrams of all board assemblies as well as how to get to each part of the t.v. down to the individual screws and their locations. Get it.
This is exactly the service manual I needed.
Complete with all schematics, partslists, PCB layouts and alignment instructions.
This manual covers both the T-4970 en T-488F Onkyo tuner.
Text excerpt from page 128 (click to view)
1
2
3
4
� Each channel output in the digital signal (�� dB (there is no sound) ) input.
A
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) No No No
Replace IC701
B
Replace IC701
Replace IC701
C
Is the output 2.5V fixing? Yes Surround L out (pin 25)
No
Replace IC701
Is the output 2.5V fixing? Yes
D
No
Replace IC701
Surround R out (pin 26)
Is the output 2.5V fixing? Yes Front L out (pin 27)
