Schematic Diagram - Sony WM-FS421 Service Manual

6-4. SCHEMATIC DIAGRAM

• Refer to page 10 for IC Block Diagrams.
• Refer to page 17 for IC Pin Function.
AM IF
IC B/D
FM VCO
IC B/D
Note on Schematic Diagram:
• All capacitors are in µF unless otherwise noted. pF: µµF
50 WV or less are not indicated except for electrolytics
and tantalums.
• All resistors are in Ω and
wise specified.
• C : panel designation.
• A : B+ Line.
• H : adjustment for repair.
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
• Voltages are dc with respect to ground under no-signal
1 / W or less unless other-
(detuned) conditions.
4
no mark : PB
( ) : FM
13 13
WM-FS421
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
F
: FM
f
: AM
E : PB