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Schematic Diagram - Main Section (1/3) - Sony MZ-R37 Service Manual

Portable minidisc recorder
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4. SCHEMATIC DIAGRAM — MAIN SECTION (2/3) —
• Waveforms
VOLT/DIV : 0.5V AC
1
(Page 20)
TIME/DIV : 1µsec
(Page 19)
(Page 14)
1.0±0.3Vp-p
(Page 14)
(Page 14)
IC501
ek
2
VOLT/DIV : 0.1V AC
TIME/DIV : 0.1msec
Approx. 0.5Vp-p
IC501
wl
VOLT/DIV : 1V AC
3
(Page 14)
TIME/DIV : 5msec
2.8Vp-p
13.4msec
IC601
qa
4
VOLT/DIV : 1V AC
TIME/DIV : 20nsec
2.6Vp-p
22.5MHz
IC601
qj
5
VOLT/DIV : 1V AC
TIME/DIV : 20nsec
2.2Vp-p
12kHz
IC801
r;
(Page 20)
Note:
• 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
/
W or less unless otherwise
4
specified.
•
%
: indicates tolerance.
•
f
: internal component.
(Page 20)
• C : panel designation.
• A : B+ Line.
• Power voltage is dc 4.5 V and fed with regulated dc power
(Page 14)
supply from external power voltage jack.
• Voltage and waveforms are dc with respect to ground
(Page 14)
under no-signal conditions.
no mark : PB
(
) : REC
∗
: 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.
• Signal path.
c : REC (digital)
– 15 –
– 16 –
MZ-R37
– 17 –
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