Schematic Diagram - Key Board - Sony ICF-SW7600GR Service Manual

4-7. SCHEMATIC DIAGRAM – KEY BOARD –
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• Refer to page 16 for IC Pin Function.
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Note on Schematic Diagram:
• WAVEFORM
• All capacitors are in µF unless otherwise noted. pF: µµF
1 50 WV or less are not indicated except for electrolytics
IC302 wf
and tantalums.
• All resistors are in Ω and
specified.
• C : panel designation.
• A : B+ Line.
1.8 Vp-p
• H : adjustment for repair.
13.3 µ s
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
15 15
• Voltages are taken with a VOM (Input impedance 10 MΩ).
Voltage variations may be noted due to normal produc-
tion tolerances.
1 / W or less unless otherwise • Voltage variations may be noted due to normal produc-
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tion tolerances.
• Abbreviation
CH : Chinese model
ICF-SW7600GR