Read Sony ICD-B120 (serv.man2) Service Manual online
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12
ICD-B120
ICD-B120
4-3. SCHEMATIC DIAGRAM — MAIN BOARD (1/2) — • Refer to page 14 for IC Block Diagrams.
IC B/D
IC B/D
IC101
RB101
C119
C120
C131
C110
C122
R120
R108
R109
C106
C107
C130
R110
R105
R107
R101
C105
R106
C102
FB101
J101
TP101
TP102
TP103
FB103
MIC101
C123
RV101
R124
R128
R131
R126
C126
C124
C104
C128
SP101
TP104
TP105
R122
C111
R129
R121
R119
R118
C108
IC102
J102
R130
C101
R115
TP106
TP107
C112
R113
R114
C134
R142
R521
R503
C505
Q507
Q508
R518
R520
R519
L501
D505
C509
C504
R510
R511
R513
R512
R516
R515
IC506
IC503
TP504
TP508
C511
TP502
R517
IC501
IC502
C512
R524
C103
R104
W101
W102
Q106
Q101
R116
C127
C109
FB105
FB106
Q102
TP507
TP505
C515
W501
W502
Q506
IC504
C513
R502
C510
C514
C516
(Page 13)
Note on Schematic Diagrams:
• All capacitors are in µF unless otherwise noted. (p: pF)
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal toleranse.
•
C
: panel designation.
•
A
: B+ Line.
• Power voltage is dc 3 V and fed with regulated dc power
supply from battery terminal.
• Voltages and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : PB
[
no mark : PB
[
] : REC
∗
: Impossible to measure
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
E
: PB
a
: REC
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