Circuit diagrams

[peter]

I am looking for cct diagrams for the following items as I want to
repair them rather than dump them. I am happy to download them or
happy to receive them as attachments to an email.
Phillips 28ct 8893/792 using chassis 2b-s
Pioneer SA-570 Stereo Amplifier.

TIA

Peter

 

[Abugaj01]

Amplifiers are mostly Transistors, although capacitors and inductors may be
used to stablize the output sound and resistors to control volume.