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 1 (click to view)
ORDER NO. KMS0105184S2
(for United Kingdom) Please file and use this supplement manual together with the service manual for Model No. KX-T7130E Order No. KM49304512C2 and KX-T7130E-B, Order No. KMS9912455A2.
KX-T7130E Note:Supplement-1~2 have already supplied with printed matter. So please refer to that. KX-T7130E-B Note:Supplement-1~2 is nothing.