Some of the pictures in this manual are a bit irritating. I had to dissassemble the unit and some of the screws have different threads, which is not mentioned in this manual. Also some of the drawings of the boards look different than the actual boards.
After all, the manual was very useful. I was able to recalibrate the capstan drive and it is working fine again.
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 20 (click to view)
4-3. PRINTED WIRING BOARDS
4-3. PRINTED WIRING BOARDS
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS
⢠⢠: Uses unleaded solder. : Circuit board : Flexible board Pattern from the side which enables seeing. : pattern of the rear side (The other layersâ patterns are not indicated) ⢠Through hole is omitted. ⢠There are a few cases that the part printed on diagram isnât mounted in this model. ⢠C: panel designation ⢠Chip parts. Transistor
C 654 456 5 44 5
