Sony SRS-NWGU50 Service Manual ▷ View online
SRS-NWGU50
SRS-NWGU50
5
5
SECTION 3
TEST MODE
VERSION DISPLAY MODE
Procedure:
1. Press the [
Procedure:
1. Press the [
?/1
] button to turn the power on.
2. Press the button in order of the [INPUT]
→ [VOLUME +] →
[VOLUME –] within three seconds after pressing three buttons
of the [INPUT], [VOLUME –] and [VOLUME +] simultane-
ously.
of the [INPUT], [VOLUME –] and [VOLUME +] simultane-
ously.
3. All LEDs blinks, and enter the version display mode.
4. Execute the following operation, and confi rm the microcom-
4. Execute the following operation, and confi rm the microcom-
puter version.
X . X X : microcomputer version
The
[
%
] indicator blinks when the [VOLUME +] but-
ton is pressed, and it is shown by the blinking fre-
quency.
quency.
The [BASS] indicator blinks when the [VOLUME –]
button is pressed, and it is shown by the blinking fre-
quency.
button is pressed, and it is shown by the blinking fre-
quency.
The [INPUT] indicator blinks when the [INPUT] but-
ton is pressed, and it is shown by the blinking fre-
quency.
ton is pressed, and it is shown by the blinking fre-
quency.
5. Press the [
?/1
] button to release the version display mode.
2-3. MAIN BOARD
Note: This illustration sees the set from bottom side.
2 four screws
(B2.6
u 6)
7 MAIN board
5 connector (CN300)
1 speaker connector (CN101)
6 wire (flat type) (9 core)
(CN100)
4 connector (CN301)
3
2-4. SPEAKER BOX ASSY
Note: This illustration sees the set from bottom side.
2 three screws (BV4 u 16)
6 speaker box assy
4
1 speaker connector (CN101)
3 chassis
3 chassis
5 top cover block
2 three screws (BV4 u 16)
SRS-NWGU50
SRS-NWGU50
6
6
SECTION 4
DIAGRAMS
4-1. BLOCK DIAGRAM
CN400
(WM-PORT)
DC_IN 20
V_IN
+5V
7
AU-L_OUT 14
AU-COM 15
AU-R_OUT 17
LINE AMP
IC100
BUFFER
IC112
R-CH
R-CH
R-CH
RXD
8
BUFFER
IC111
TH100
TXD 10
J100
LINE IN
INPUT SELECT
IC102
IN2
3
IN1
1
ASEL0
84
ASEL1
85
WM-PORT_TX
35
WM-PORT_RX
36
WALKMAN_DET
37
OUT 7
SW1 2
SW2 4
SW2 4
A/D CONVERTER
IC108
VINL
13
VINR
14
DOUT 9
BCK 8
LRCK 7
SCKI 6
CLOCK BUFFER
IC107
X100
12.288MHz
DIGITAL POWER AMP
IC109
SDIN1
25
SDIN2
24
SCLK
23
LRCK
22
MCLK
34
OUT_C 49
OUT_C 50
OUT_C 50
OUT_D 45
OUT_D 46
OUT_D 46
OUT_A 4
OUT_A 5
OUT_A 5
OUT_B 1
OUT_B 64
OUT_B 64
SDA
28
SCL
29
MUTE
21
DAMP_SDA 24
DAMP_SCL 22
DAMP_MUTE 21
VALID
36
DAMP_VALID 23
PDN
17
AMP_PDN 19
RESET
16
DAMP_RESET 18
LPF
LPF
LPF
LPF
OVER LOAD
DETECT
Q102, 103
OVER LOAD
DETECT
Q104, 105
DC DETECT
Q101
SYSTEM CONTROLLER
IC300
RESET 12
+5V
REGULATOR
IC106
J101
RESET SIGNAL
GENERATOR
IC302
DC IN 13V
–
+
+13V
A +5V
+2.8V
REGULATOR
IC110
+3.3V
REGULATOR
IC105
+2.8V
+3.3V
SWITCHING
REGULATOR
IC101
+5V
AC_CUT 20
PWR CTL 51
DC_DET 57
15
13
X300
5MHz
Xin
Xout
REMOTE
CONTROL RECEIVER
IC600
SIRCS_IN
4
KEY_VOL+
95
S601
VOL +
KEY_INPUT
97
S501
INPUT
INPUT
KEY_POWER
74
S500
I/
1
I/
1
KEY_VOL-
94
S600
VOL -
D601
BASS
D600
%
LED_LINE
77
D501
LED_POWER
89
LED_POWER
90
LED_POWER
91
LED_POWER
92
D500
LED_LINE
78
LED_LINE
79
LED_LINE
80
LED_MUTING
65
LED_MUTING
66
LED_MUTING
67
LED_MUTING
68
LED_BASS
69
LED_BASS
70
LED_BASS
71
LED_BASS
72
SIGNAL PATH
: AUDIO
R-ch is omitted due to same as L-ch.
L-CH
SPEAKER
BOX
ASSY
R-CH
SRS-NWGU50
SRS-NWGU50
7
7
For Schematic Diagrams.
Note:
• All capacitors are in μF unless otherwise noted. (p: pF) 50
• All capacitors are in μF unless otherwise noted. (p: pF) 50
WV or less are not indicated except for electrolytics and
tantalums.
tantalums.
• All resistors are in Ω and 1/4 W or less unless otherwise
specifi ed.
•
C : Panel designation.
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
•
A : B+ Line.
• Voltages and waveforms are dc with respect to ground
under no-signal conditions.
no mark : POWER ON
• Voltages are taken with VOM (Input impedance 10 M
• Voltages are taken with VOM (Input impedance 10 M
Ω).
Voltage variations may be noted due to normal production
tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal production
Voltage variations may be noted due to normal production
tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F :
AUDIO
For Printed Wiring Boards.
Note:
•
•
X : Parts extracted from the component side.
•
Y : Parts extracted from the conductor side.
• f : Internal component.
•
: Pattern from the side which enables seeing.
(The other layers’ patterns are not indicated.)
• Indication of transistor.
C
B
These are omitted.
E
Q
Caution:
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Pattern face side:
(Conductor Side)
Parts face side:
(Component Side)
Parts on the pattern face side seen
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
from the pattern face are indicated.
Parts on the parts face side seen from
the parts face are indicated.
1
IC107 2 (IN)
1 V/DIV, 50 ns/DIV
81 ns
2.5 Vp-p
4
IC300 qd (Xout)
1 V/D, 100 ns/DIV
200 ns
3.2 Vp-p
20.8
Ps
4 Vp-p
2
IC108 7 (LRCK)
1 V/DIV, 10
Ps/DIV
3
IC108 8 (BCK)
1 V/DIV, 200 ns/DIV
328 ns
4.2 Vp-p
• Waveforms
– MAIN Board –
SRS-NWGU50
SRS-NWGU50
8
8
4-2. PRINTED WIRING BOARD - MAIN Board (Component Side) -
C195
C187
C185
C176
C174
C170
C172
C171
R161
R160
R159
R158
C168
C254
C252
C102
C235
C101
C100
TH100
R101
R102
R105
R104
R103
C169
C177 C175
C183
C184
C179
C186
C151
C144
C310
R336
C140
C137
C131
C128
C216
C217
C218
C219
C230
R186 C226
C222 R182
C221
C225
C229
R181
R185
C228
C232
C224
R188
C227
C231
C233
R189
C220
R178
R183
R190
R184
R191
R187
R180
C223 R176
FB120
FB121
FB119
FB122
C152
C178
C180
C173
C181
C182
R164 R163
R165
R169
R157
R155
FB118R151
L104
R156
R152
R337
R339
R335
R341
R330
R333
R331
R324
R310
R308
R306
R308
R306
R300
R305
R316
R315
R314
R313
R328
R143
R326
R325
R323
R317
R154
R150
R149
R148
R118
R122
R110
R123
R119
R126
R312
R360
R359
C305
C317
C316
C314
C303
C300
C302
C301
C304
R168
R162
R167
R166
C194
C197
C196
C193
C203
C200
C189
C199
C188
C146
C198
IC111
3
1
4
6
IC112
3
1
4
5
IC110
3
1
4
5
IC302
IC300
3
1
4
2
IC107
IC109
3
1
1
4
5
C159
C160
C161
C162
C156
C164
C157
C158
C163
C148
C147
C111
C129
C126
R133
R134
C124
R132
R129
FB117
R128
R135
R131
C125
C150
C123
C120
C119
C118
C117
C122
R130
R127
C121
C130
C110
C154
C153
IC106
3
1
7
1
8
14
4
5
IC103
IC100
IC108
8
1
4
5
IC102
8
1
4
5
CN301
1
7
CN100
1
9
CN300
1
5
CN101
1
4
IC105
IC101
3
1
4
5
E
C
B
Q103
E
C
B
Q102
E
C
B
Q105
E
C
B
Q104
E
C
B
Q101
L103
D101
D100
A
K
A
K
X100
1
16
17
32
64
48
33
49
MAIN BOARD
(COMPONENT SIDE)
1-880-652-
(11)
11
81
100
50
31
1
30
80
51
8
1
4
5
LED BOARD
CN500
B
DOCK BOARD
A
VOL BOARD
CN600
C
1
5
L-CH
SPEAKER
BOX
ASSY
R-CH
A
B
C
D
E
F
G
H
1
2
3
4
5
6
7
•
: Uses unleaded solder.
(Page 12)
(Page 12)
(Page 12)
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