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 52 (click to view)
5-2
CK100-M CKBUF-M
DNI
4 3 2 1
D
5 Schematic Diagrams and PCB Silkscreen
5-1-1(a) Main Board Schematic Sheet 2 of 26(Clock Chip)
C
B
1) Don't place Clock chip edge. Place near PCB center and mounting hole.
Make the clock generator area more "clean"
2) Every power pins have a decoupling CAP direct connect it.
Make the shortest trace.
3) Ground pin directly connect to ground plane.
4) Make trace power ground pin short and wider than width of chip pad.
5) Don't place via between clock chip power pin and decoupling CAP.
6) Clock trace must have damping resistor and filter Capacitor near to clock chip output pin.
A
7) No other signal trace across through the clock generator area.
Including crystal, clock chip, decoupling capacitor, damping and filter.
