Note on Printed Wiring Boards: MAIN SECTION
•X : parts extracted from the component side.
•
: Pattern from the side which enables seeing. (The other layers' patterns are not indicated.)
Caution: |
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Pattern face side: | Parts on the pattern face side seen from the |
(Side B) | pattern face are indicated. |
Parts face side: | Parts on the parts face side seen from the |
(Side A) | parts face are indicated. |
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Note on Schematic Diagram: MAIN SECTION
•All capacitors are in ∝ F unless otherwise noted. pF: ∝∝ F 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.
Note: The components identified by mark 0or dotted line with mark 0are critical for safety.
Replace only with part number specified.
•
: 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 under
no mark : PLAY
•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.
•Signal path. F : Analog
J : Digital
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