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Model
ICD-B25
Pages
26
Size
1.31 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
icd-b25.pdf
Date

Sony ICD-B25 Service Manual ▷ View online

ICD-B25
8
8
3-2. BLOCK DIAGRAM
3
4
1
3
5
1
6
4
22
4
1
13
6
11
8
13
7
11
2
3
12
8
5
6
10
38
35
37
34
36
59
72
7
8
9
16
17
19
18
5
3
101
56
55
120
4
96
13
12
14
15
16
57
52
49
95
53
47
48
100
29
31
33
27
28
42
43
9
4
14
15
9
6
3
3
1
6
7
6
1
58
11
36
4
3
2
35
37
41
1
98
74
7
6
1
46
2
51
86
90
1
92
93
15
20
17
8
9
10
11
103
ı
110
59
62
ı
12
37
64
72
ı
75
81
ı
17
32
ı
29
32
ı
41
44
ı
9
8
VIN+
VIN-
VOUT
2
3
VIN
CE
VOUT
IC505
+2.9V REG
2
3
VIN
CE
VOUT
IC506
+2.9V REG
5
2
3
VIN
CE
VOUT
IC502
+3.1V REG
DC-DC
CONVERTER
(3.2V)
DC-DC
CONVERTER
SI
SO
SCLK
CE
INTR
32KOUT
S701 - 705
3
1
+
-
17
 • Signal Path
: PB
: REC
MIC101
MIC
MIC
J101
IC101
MIC AMP
Q101
MIC
SENS
IC102
ALC AMP
IN
OUT
INPUT OUT1
IC103
VOR CONTROL
IC107
A/D, D/A CONVERTER
VIN
VOUT
PDWN
XTI
BCK
FS
DIN
DOUT
IC109
DSP
SCK1
SI1
SO1
SIEN1
SOEN1
P3
P2
SI2
SO2
SIEN2
SOEN2
SCK2
CLKIN
/RESET
IC105
IC106
IC712
SYSTEM CONTROL
IC104, 108
CLOCK GEN
CLKIN
CLKIN
CE
CE
Q0
Q0
IC706
FLASH MEMORY
Q702
+B
SW
ZVCC
Q705, 706
WAKE-UP
SW
IO1
ı
IO8
VCC
R/B
RE
CE
CLE
ALE
WE
WP
DSPIFREQ
DCOMDT
XDIFEN
SIN1
SOT1
SCK1
XVORIN
FLMIO00
ı
FLMIO07
FLMRB
XFLMRE
XFLMCE0
FLMCLE
FLMALE
XFLMWE
XFLMWP
FLMSEL
SPEED
WAKEUP
KEYPUP
KEYIN0
KEYIN1
HOLDSW
DSPSYSCK
DSPPWR
ADASYSCK
XDSPRST
DSPACK
SOT2
SIN2
SCK2
SIPCS
RTCCE
RTCINTR
SUBCLK
BATT
HPJACK
XHSTBY
XRESET
XTALIN
XTAL
COM0
COM3
SEG00
ı
SEG31
ı
X701
4.096MHz
LCD101
LIQUID
CRYSTAL
DISPLAY
PANEL
RESET
IC710
Q707
SW
IC716
REAL-TIME CLOCK
X702
32.768kHz
Q710
SW
IC715
SI/PO DRIVER
DATA
CLOCK
XFLMPWR
MICSENSE LMUTE
XSPPWR
XHPPWR
HPMUTE
XREDLED
XGRNLED
APOWER
ADAPWR
XLIGHT
XBATTEN
IC112
AMP
VIN- VOUT
Q106
LPF
SW
Q107, 108
LPF
SW
Q102
MUTE
Q105
BUFFER
IC110
POWER AMP
STNBY
IN2
IN1
INV
OUT
Q103
SW
D703
OPR
SP101
SPEAKER
J102
EAR
IC504
IC508, Q503
VOLTAGE
DETECTOR
IC507
DECODER
Q504
AVCC
DSPVCC
MICVCC
ADAVCC
ZVCC
SVCC
D701, 702
(BACK LIGHT)
AVCC
RF
AVCC
SOT2
OSCIN
OSCOUT
BEEP
S706, 707
S722
S726
S721, 723 - 725
MAIN BOARD
P-SW BOARD
F-SW BOARD    (2/2)
F-SW BOARD    (1/2)
DRY BATTERY
SIZE"AAA"
(IEC DESIGNATION LR03)
2PCS,3V
RED (REC)
GRN (PB)
RV101
VOL
SLOW       NORMAL      FAST
S702
PLAY SPEED
3.1V
2.9V
2.9V
2.3V
3V
5
5
ICD-B25
9
• Waveforms
1.3Vp-p
1
IC712 
od
 (XTAL)
0.5V/div   50nsec/div
4.096MHz
2
IC716 
8
 (OSCOUT)
0.2V/div   10µsec/div
32.768kHz
0.8Vp-p
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is
printed in each block.)
Common Note on Schematic Diagrams:
• 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 
1
 and 
1
/
4
 
W or less unless otherwise
specified.
f
: internal component.
C
: panel designation.
A
: B+ Line.
• Power voltage is dc 3V and fed with regulated dc power
supply from battery terminal.
• Voltages are taken with a VOM (Input impedance 10 M
1
).
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
a
: REC
*
 IC109 on main board are not replaceable.
• The voltages and Waveform of CSP (chip size package)
cannot be measured, because its lead layout is different
from that of conventional IC.
Common Note on Printed Wiring Boards:
X
: parts extracted from the component side.
Y
: parts extracted from the conductor side.
f
: internal component.
: Pattern from the side which enables seeing.
Lead layout of conventional IC        CSP (chip size package)
surface
Caution:
Pattern face side:
Parts on the pattern face side seen from
(SIDE B)
the pattern face are indicated.
Parts face side:
Parts on the parts face side seen from
(SIDE A)
the parts face are indicated.
*
 IC109 on main board are not replaceable.
Lead Layouts
ICD-B25
10
10
3-3. PRINTED WIRING BOARD — MAIN SECTION —
 : Uses unleaded solder.
D703
G-2
IC101
E-4
IC102
D-6
IC103
C-5
IC104
E-7
IC105
G-4
IC106
F-8
IC107
F-5
IC108
F-6
IC109
E-8
IC110
F-10
IC112
F-7
Q101
D-5
Q102
B-13
Q103
B-12
Q105
B-10
Q106
F-7
Q107
D-13
Q108
E-13
• Semiconductor
Location
Ref. No.
Location
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1-680-349-
(12)
12
MAIN BOARD   (SIDE A)
C114
C117
IC103
C104
C105
C139
C102
C142
C144
C110
R105
C175
R766
C153
Q103
Q102
C160
C168
C161
C169
R155
C150
R121
R139
R159
C145
C149
R153
R157
Q107
Q105
Q108
R765
R767
R170
R171
R169
R106 R107
C103 R109
C101
C115
C127
IC108
C163 C173
C162
C171
R187
C121
R762 R178
C118
C119
R787
R786
FB105
D703
D703
OPR
R161
IC105
C120
R165
FB104
C112
IC102
IC107
Q101
R114
FB102
FB101
C108 C107
R102
R104
R103
R110
R108
C116
R116
C109
R112
R183
R185
R184
C128
C164
R142
C124
C155
C126
C123
C122
R118
R186
C165
R140
R129
R764
R122
R141
R111
C111
C156
C152
RB103
RB102
RB101
C157
C154
C170
C167
C151
C141
C140
C125
C131
*
IC109
CSP
(CHIP SIZE PACKAGE)
IC110
C129
Q106
IC104
C106
R117
R113
R730
R166
R150
R152
R133
R181
R158
R189
R143
C132
R182
R146
R147
C137
C135
R179
R167
R144
R115
C113
R101
J101
J102 
EAR
TP115
TP704
TP114
TP712
TP711
TP710
TP120
TP110
TP709
TP123
TP117
TP708
TP101
TP108
TP122
TP713
TP116
TP705
TP119
TP112 TP113
TP702
TP701
TP706
TP118
TP121
TP111
G
D
S
B
C
E
G
D
S
G
D
S
IC112
IC106
G
D
S
S
D
G
3
1
4
5
2
54 13
2
3
4
5
2
1
6
5
4
1
1
12
24
13
3 2
3
2
1
4
1
C
9
18
E
B
10
6 5
1
9
5
4
1
3 2
IC101
3
2
1
4
5
TP703
1
4
8
5
RV101
VOL
-1
L
-2
R
FAST
NORMAL
SLOW
S702  PLAY SPEED
-1
-2
MIC
ICD-B25
11
11
 : Uses unleaded solder.
D701
F-13
IC706
E-8
IC710
F-6
IC712
E-4
IC715
C-3
IC716
E-14
Q702
E-9
Q705
G-12
Q706
G-13
Q707
C-3
Q710
D-9
• Semiconductor
Location
Ref. No.
Location
(Page 17)
(Page 18)
(Page 18)
1
A
B
C
D
E
F
G
H
I
J
2
3
4
5
6
7
8
9
10
11
12
13
14
15
1-680-349-
(12)
12
MAIN BOARD   (SIDE B)
C172
X701
C753
R717
X702
IC716
R703
C747
R724
R723
R721
R771
CN703
R774 R778
R776
Q706
Q705
C757
R711
C709
C727
C728
C750
MIC101
MIC
C740
C739
Q702
C748
R794
R716
R757 C749
Q707
R763
C744
C743
C742
R732
R799
IC706
R168
D701
C759
R770
R718
R760
R758
R719
C763
R731
R734
R726
R729
R725
R188
C726
R714
R756
C754
C746
R754
R759
R722
C755
R172
R720
R798
Q710
R769
C758
R701
R702
W707
W702
W703
TP104
TP103
TP107
TP105
TP106
TP102
G
D
S
S
D
G
1
3
25
48
24
1
120
91
90
1
61
60
31
30
1
36
30
25
10
15
20
5
IC710
IC712
2
B
C
E
B
C
E
G
D
S
1
15
16
30
 F-SW BOARD
CN501
1
P–SW BOARD
2
W705
W704
W701
W706
P–SW BOARD
3
1
5
10
6
IC715
1
8
16
9
SP101
SPEAKER
LCD101
LIQUID CRYSTAL DISPLAY PANEL
CN702
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