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5-3.
SCHEMATIC DIAGRAM •
See page 14 for IC Block Diagrams.
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
specified.
• C : panel designation.
• A : B+ Line.
• H : adjustment for repair.
• Total current is measured with no cassette installed.
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
13
13
M-640V/645V/647V
• Voltages are dc with respect to ground in playback mode.
no mark : PLAYBACK
(
) :REC
1
/
W or less unless otherwise
• Voltages are taken with a VOM (Input impedance 10 MΩ).
4
Voltage variations may be noted due to normal produc-
tion tolerances.
• Signal path.
E
: PLAYBACK
a
: REC
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