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 1/4 W or less unless otherwise specified.
•f : internal component.
•C: panel designation.
•A : B+ Line.
•Power voltage is dc 1.5V and fed with regulated dc power supply from battery terminal.
•Voltages and waveforms are dc with respect to ground in playback mode.
no mark : PLAYBACK
( ) : CHARGE
∗: Impossible to measure
•Voltages are taken with a VOM (Input impedance 10 MΩ ). Voltage variations may be noted due to normal produc- tion tolerances.
•Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc- tion tolerances.
•Circled numbers refer to waveforms.
*Replacement of IC801 used in this set requires a special tool. Therefore, it cannnot be replaced.
•The voltage and waveform of CSP (chip size package) cannot be measured, because its lead layout is different form that of conventional IC.
6-7. SCHEMATIC DIAGRAM – MAIN Board (3/4) – • See page 37 for Waveforms.
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