WM-EX372
– 13 –
– 14 –
5-3.
SCHEMATIC DIAGRAM
•
See page 15 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
1
/
4
W or less unless otherwise
specified.
•
C
: panel designation.
•
U
: 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 external power voltage jack.
• Voltages and waveforms are dc with respect to ground in
playback mode.
no mark : PB (FWD)
(
) : PB (REV)
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
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.
E
: PB
•
Waveforms
1
IC601
1
(WB)
100 mV/DIV, 2 ms/DIV
2
IC601
!¡
(OSC)
10 mV/DIV, 1 ms/DIV
290 mVp-p
4.5 ms
40 mVp-p
1.5 ms
Ver 1.2 1999. 03
Summary of Contents for Walkman WM-EX372
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