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.
Wanting to repair a neighbours tape recorder I needed the necessary information, it makes it easier. Although the service manual is described as "Language : English" To my dismay I found that it is entirely written in German, a language I do not understand. At least I now have the schematics which will help of sorts. I may not use this service again due to the laguage difficulty after all when it states English you do not expect it to be entirely in another language.
GOOD SERVICE MANUAL.I ALWAYS BUY THERE IF I FIND WHAT I AM LOKING
Text excerpt from page 2 (click to view)
KRC-694/Y KRC-766
DISASSEMBLY FOR REPAIR
How to install the Volume Knob
1. Remove the peeling paper of LIGHTING BOARD BOSS side. 2. CAP and LIGHTING BOARD are install positioning as shown.
LIGHTING BOARD
How to remove the Volume Knob
1. Remove the rear cover of panel unit. 2. Juck up as remove the switch unit (x16-) and Volume Knob as shown.
Be careful of direction.
CAP
3. Remove the peeling paper.(Use Tweezers) 4. CAP and Volume Knob are install positioning as shown.
(CAUTION)
Volume Knob cannot pull of front side that looked at tab point in the rotary encoder.
Rib: short Rib: tall
CAP
KNOB(VOL)
Dented part
5. Install a Volume Knob in rotary encoder positioning as shown.
KNOB(VOL)
Mount the Volume Knob into the broad Y shaped cutting in the direction of the picture.