Technics SA-EH770 Service Manual page 31

: Mic signal line
9. Schematic Diagram
10. Printed Circuit Board Diagram
11. Type Illustration of ICs, Transistors and Diodes
12. Wiring Connection Diagram
13. Block Diagram
14. Terminal Function of ICs
14.1. IC901 (C2BBFD000297):
System Control/FL Drive
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