Sony MDR NC50, Service Manual

Page: 14 / 22

MDR-NC50
14 14
MDR-NC50
4-4. SCHEMATIC DIAGRAM
•
See page 10 for Waveforms.
•
See page 10 for IC Block Diagrams.
R135
C107
RV2
L51
100
µ
H
R46
R146
C
2
8
R11
IC1
C8
Q1
R16
R17 R18
Q2
R19
C7 R3
R4 R5 C1
C4
R1
C
5
5
C
5
6
C
5
7
R
5
5
R
5
7
C
6
0
C59
R54
R56 D51
IC52
C24 C13 C16
R26
C21
R27
R28
C22
R31
C25
R32
C27
R35
C33
R41
IC5
JW1
R42
C36
R60
G
R
L
C
3
9
R44
R45
R62
C40
C
4
1
C42
IC6
C45
R48
R47
R50 R49
SP1
C104
C101
C203 C202
R158
R159
Q155
C160
R156
R
1
5
5
C
1
5
9
R
1
5
4
C
1
5
2
C
1
5
3
C108
C201 R202 R203 R204
C
1
1
6
R126
R127
R128
C121
C161
R157 C157
R206
R205 C204
IC152
C156
C154
L151 D151
C155
R153 R152 R151
Q151
Q201
R201
C122
R111
C
1
1
3
Q101
Q102
C139
R116 R117
R119
R118
R143 C137
RV102
R161
IC106
R144
R145 R162 C140 C141 C142
R
1
4
7
R
1
4
8
R
1
5
0
R
1
4
9
C145
IC105
R139
C136
R142
JW101 R132
C127
R131
C125
C124
R105 R104
R103
R101
C
1
2
8
C
1
2
9
R141 C133
R58
R59
Q54
C37
R61
R43
SP101
IC101
C
2
9
Q202
J1
C
5
8
S1
Q55
R65 C63 R37 C30
R38 R36
IC3
R29
IC4
C31
C35
C38
C43 C44
R63
R64
R30 C26
R33
R34
C6
R6 R7
C46
R8
C12
C11 R10
JW2
RV1
IC2
C14
R13
R12
R166 Q152
C165
D201
IC151
C158
R165
C163
R129
R136
C130
R138
R137
R130
R134
R133
C
1
2
6
C131
C135
C106
C112
C138
R106 R107
C146
C111 R110
C114
R112 R113
IC102
R108
R114 R115
J102
R163
R164
MIC101
MIC102
R68
C18
R22
R122
R125
R23
R25
C20
R24
C19 C17
C117 C119
S301
MIC2
MIC1
C
1
4
3
C
1
4
4
Q53
C61
R15 R14 R39
C47
Q153
Q154
IC103 IC104
C147
R168
R124
C120
C118
R123
16k
2.2
10k
22k
22k
0
.0
1
39k
R1160N101B
1
IMX9
1k
1k 1k
IMX9
1k
2.2 1.2k
1.5k 1 1000p
1000p
C5
0.047
2.7k
0
.0
1
2
2
0
4
V
0
.1
1
8
0
k
1
0
0
k
2
.2
33p
220k
100k RB161M-20TR
XC9103D091MR
0.1 0.1 0.1
16k
0.022
3.3k
16k
0.0015
100k
0.047
1.5k
0.047
16k
0.01
470k
SN74LVC1G3157
0
10k
0.022
4.7k
0
.1
47k
47k
220k
4.7
0
.1
1
LM4916LDX/NOP
0.033
22k
22k
4.7 4.7
1000p
C105
0.047
1000p
0.0022 0.0022
10k
470
2SC2412K
2.2
100k
1
8
0
k
3
3
p
2
2
0
k
2
2
0
4
V
0
.0
1
1
1 10k 10k 10k
0
.1
16k
3.3k
16k
0.022
0.01
100k 0.1
4.7k
330 0.1
XC9103D091MR
220
4V
4.7
RB161M-20TR
0.01
220 10k 100k
2SB1690K
UMW1N-TR
100
0.0015
39k
0
.1
IMX9
IMX9
0.1
1k 1k
1k
1k
2.2k 2.2
10k
10k
LM4916LDX/NOP
47k
47k 220k 4.7 0.1 1
2
2
k
2
2
k
4
.7
4
.7
0.033
SN74LVC1G3157
2.2k
0.022
10k
0 1.5k
0.047
100k
0.047
0.1
1 1.5k
1.2k
2.7k
0
.0
1
0
.0
4
7
470k 0.01
10k
470
2SB1690K
2.2
10k
2.2k
R1160N101B
0
.0
4
7
UMA4N-TR
2
2
6
.3
V
2SC2412K
39 22
6.3V
10k 0.0022
56k 4.7k
NJM2732RB1
47k
NJM2732RB1
4.7
0.1
10
10V
22
6.3V
22
6.3V
4.7
4.7
2.7k 0.01
820
100
22
6.3V
4.7k 2.2k
0.022
1k
0.47
0.047 22k
0
10k
NJM2732RB1
10
10V
47k
47k
10k 2SC2412K
4.7
CL-196HR
XC61CN1002NR
22
6.3V
39
22
6.3V
47k
47K
0.0022
56k
10k
2.7k
100
820
0
.0
1
4.7
0.1
22
6.3V
0.47
10
10V
4.7k 2.2k
0.022
0.047 22k
10 10V
47k 47k
NJM2732RB1
1k
39 10
0
4.7
4.7
RV101 10k
330k
0.1
47k
47k
10k
10k
10k
0.22
100k
0.047 0.047
0.047 0.047
2
2
6
.3
V
2
2
6
.3
V
XP151A13
A0MR
0.01
10 39 2.2k
0.33
BATT
XP151A13
A0MR
2SB1690K
NJM2732RB1 NJM2732RB1
0.33
330k
100k
0.22
0.1
10k
VIN CONT
NC GND
IN-A IN-B MUTE SD
GND VDD
GND
V-OUT ECO
VIN CE
GND VIN
V-OUT ECO
CE
E
XT
V-O
U
T
VD
D
CE
G
N
D
G
N
D
E
XT
V-O
U
T
V
D
D
C
E
PASS
BY
OUT
B
SE/
BTL OUT
A
VDD OUT
A BTL
SE/ OUT
B
GND
IN-B
PASS
BY MUTE SD IN-A
-1 -2 -2 -1
-1 -2
-2 -1
(INPUT)
S
DC/DC
DC/DC
MONITOR Q54,55
V
CC
GN
D
BUFFER
BUFFER
VC
C
G
N
D
MONITOR
SWITCH
GND
VCC
VOLUME
POWER AMP
(L-CH)
+1V REGULATOR
NOISE CANCEL
VOLUME(L)
MIC AMP
G
N
D
V
C
C
SWITCH SWITCH
(MONITOR)
(NOISE DETECT)
Q151,152
Q201,202
LED DRIVE
POWER
VOLTAGE
DETECT
S
DC/DC
CONVERTER
DC/DC
CONVERTER
BUFFER BUFFER MONITOR SWITCH
V
C
C
G
N
D
VC
C
G
N
D
+1V REGULATOR MIC AMP
V
C
C
G
N
D
-2 -1
-2 -1
SWITCH
SWITCH
VOLUME
POWER AMP
(R-CH)
NOISE CANCEL
VOLUME(R)
(MONITOR)
(NOISE DETECT)
POWER
OFF
ON
DRY BATTERY
SIZE"AAA"
(IEC DESIGNATION R03)
1PC. 1.5V
TOTAL CURRENT
18mA
1
4
1
2 2
1
1
4
B+ SWITCH
CONVERTER
B+ SWITCH
B+ SWITCH
B+ SWITCH
VCC
GND
CONVERTER