Sony SA-WCT770 Service Manual ▷ View online
SA-WCT770
SA-WCT770
21
21
Note: When the IC104 on the SUB MAIN board is replaced, refer to “NOTE OF REPLACING THE
IC104 ON THE SUB MAIN BOARD AND THE COMPLETE SUB MAIN BOARD” on page 4.
4-5. SCHEMATIC DIAGRAM - SUB MAIN Board (2/2) -
• See page 17 for Waveforms. • See page 25 for IC Block Diagrams.
5
2.9
3.3
4.1
1.7
3.3
3.3
0
3.3
1.6
1.6
1.6
1.6
3.3
1.6
3.3
1.6
1.6
1.6
3.3
1.6
3.3
11.9
27.3
32
32
16
16
32
27.3
27.3
27.3
32
11.9
32
32
16
16
0.6
0
15.8
0
3.4
3.3
3.3
1.6
1.6
3.3
1.6
1.6
1.7
1.5
3.3
0
1.6
1.6
3.5
3.2
0.9
11.9
32
32
3.5
3.3
1.6
11.9
1.6
3.5
3.2
3.2
1.1
1.6
1.6
1.6
2.9
11.9
11.9
3.5
0
0
15.9
2.5
3.5
0
15.9
2.9
15.8
3.2
0
1.8
3.3
1.7
3.2
0
3.2
0
0
3.5
3.2
1.6
3.3
1.6
1.6
3.3
3.3
2
4
3
6
C196
0.001
0.01
C166
0.1
C133
0.1
C130
0.1
C126
0.1
C127
0.1
C134
0.1
C137
0.1
C148
0.1
C129
7p
C185
C184
7p
C174
2.2
C140
2.2
C152
2.2
2.2
C165
2.2
C177
0.1
C125
0.01
C122
C05
0.1
1
C158
10
C155
10
C167
1
C179
C120
22p
0.1
C198
C118
0.1
C191
0.001
0.1
C209
0.1
C197
1
C162
C172
2.2
C194
0.1
6.3V
1000
C203
C170
1000
6.3V
50V
47
C195
16V
100
C175
16V
100
C178
16V
C141
100
16V
47
C119
16V
100
C199
CL150
CL151
CL158
CL152
CL155
CL145
CL149
CL148
CL153
CL161
CL162
CL160
CL159
CL147
CL141
CL143
CL156
CL142
CL144
CL157
CL154
CL146
4P
CN109
SW(–)
1
SW(–)
2
3
SW(+)
4
SW(+)
8P
CN114
32V
1
2
32V
32V
3
GND
4
GND
5
GND
6
MAIN-ON
7
E4V
8
CRH02(T5R,SONY
,XM)
D
111
E
ET100
TC7SHU04FU
IC107
1
NC
2
3
GND
4
5
VCC
4
3
1
2
MM3411A18URE
IC106
CE
VSS
VOUT
VIN
14
13
12
11
10
9
8
7
6
5
4
3
2
1
TC74LCX74FT(EKJ)
IC103
1/CLR
1D
1CLK
1/PRE
1Q
1/Q
GND
2/Q
2Q
2/PRE
2CLK
2D
2/CLR
VCC
44
38
39
40
41
42
43
7
6
5
4
3
2
1
37
36
35
34
33
32
8
9
10
11
28
29
30
31
17
16
15
14
13
12
27
26
25
24
23
22
21
20
19
18
CXD9981TN
IC104
GVDD_B
/DTW
NC
NC
/SD
PWM_A
/RESET_AB
PWM_B
OC_ADJ
GND
AGND
VREG
M3
M2
M1
PWM_C
/RESET_CD
PWM_D
NC
NC
VDD
GVDD_C
GVDD_D
BST_D
NC
PVDD_D
PVDD_D
OUT_D
GND_D
GND_C
OUT_C
PVDD_C
BST_C
BST_B
PVDD_B
OUT_B
GND_B
GND_A
OUT_A
PVDD_A
PVDD_A
NC
BST_A
GVDD_A
1
2
3
4
5
6
7
8
9
10
11
12
13 14 15 16 17 18 19 20 21 22 23 24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
CXD9843AR
IC105
XVSS
VSUBC
VSSR
OUTR2
VDDR
OUTR1
VSSR
VSSL
OUTL2
VDDL
OUTL1
VSSL
XOVSS
XFSOOUT
XOVDD
DVDD
DVSS
NSPMUTE
SOFTMUTE
PGMUTE
SCDT
SCSHIFT
SCLA
TCH
FLAGR
FLAGL
SFLAG
INIT
MCKSEL
LRCK
BCK
DATA
BFVDD
BFVSS
TEST
DVDD
XFSIIN
FSOCKO
FSOI
HPOUTR2
HPVSSR
HPOUTR1
HPVDDR
HPOUTL2
HPVSSL
HPOUTL1
HPVDDL
XVDD
XFSOIN
1
2
3
4
5
SI-3010KM-TLA
IC109
VCONT
VIN
GND
VOUT
SENSE
JL141
JL152
JL153
JL138
JL136
JL139
JL134
JL157
JL131
JL144
JL145
JL137
JL135
JL143
JL146
JL133
JL132
JL127
10uH
L002
10uH
L001
HN1A01FU
Q106
1
2
3
4
5
6
HN1C01FU
Q104
1
2
3
4
5
6
2SB1690KT146
Q110
LSCR523UBFS8TL
Q105
LTC014EUBFS8TL
Q112
LTC014EUBFS8TL
Q108
100
RB003
R222
100
100
R193
100
R196
100
R198
33k
R186
1.5k
R184
47k
R172
R178
220
R183
220
R176
220
R173
100
10k
R171
22
R217
100
R185
100
R188
100
R191
10k
R232
0
R194
0
R192
22k
R205
R208
0
R202
100k
0
R200
R203
100k
10k
R167
R233
10k
390
R221
R236
470
R235
470
R181
100
10k
R165
R209
0
100k
R199
4.7k
R187
1k
R243
1k
R242
22k
R175
0
R230
1k
R224
10k
R223
100
R177
10k
R225
0
R197
0
R195
150
R206
100k
R190
R216
0
1M
R219
R179
220
SL122
SL100
MM3411A33URE
IC108
CE
1
GND
2
VOUT
3
VDD
4
49.152MHz
X101
FB101
0.68uH
CL177
CL178
CL179
CL180
CL181
0.001
C210
0.001
C211
0.1
C131
0.1
C132
0.1
C189
0.1
C188
0.1
C187
100k
R231
DZ2J056M0L
D112
35V
470
C204
35V
470
C205
35V
470
C207
35V
470
C206
0.1
C186
0.1
C161
0.1
C157
0.1
C135
R234
47k
C136
2.2
LRCK
BCK
DATA
256FS
STREAM PROCESSOR
IC105
2
1
3
5
4
6
7
8
9
PRESCALER
IC103
10
12
13
15
14
16
17
11
+1.8V REGULATOR
IC106
+3.3V REGULATOR
IC108
CLOCK BUFFER
IC107
DIGITAL POWER AMP
IC104
+12V REGULATOR
IC109
(1/2)
SUB MAIN
>001S
BOARD
POWER
>03S
CN901
BOARD
(2/2)
SUB MAIN BOARD
(CHASSIS)
POWER DETECT
Q110, 112
B+ SWITCH
POWER DETECT
DC DETECT
BUFFER
SP1
(SUBWOOFER)
10
11
12
13
14
15
G
16
H
17
I
18
F
1
C
J
D
6
E
K
2
B
3
A
4
5
7
8
9
(Page 23)
(Page 20)
SA-WCT770
SA-WCT770
22
22
4-6. PRINTED WIRING BOARD - POWER Board -
•
: Uses unleaded solder.
4
3
3
1
2
2
4
3
3
1
2
E
E
E
E
E
IC940
IC950
CL900
CL901
CL902
CL903
CL904
CL905
CL909
CL910
CL911
CL912
CL913
CL914
CL915
CL916
CL917
CL918
CL920
CL921
CL922
CL923
CL924
CL925
CL926
CL927
CL928
CL929
CL930
CL940
CL941
CL942
CL943
CL950
CL951
CL952
CL953
CL960
CL962
CL963
CL964
Q921
Q922
Q923
CAM901
PATTERN
SPARK-GAP
Q960
Q961
R901
Q962
R902
R903
R904
R905
R910
R914
R915
R916
R920
R925
R927
R928
R929
R930
R931
R932
R940
R941
R942
R943
R944
R945
R946
R947
R949
R950
R951
C916
R953
R955
R956
R957
JL900
JL901
R959
JL902
JL903
JL904
JL905
JL906
JL908
R960
TH920
JL909
R961
C925
R962
R963
C928
C929
JL911
JL912
JL913
JL914
C930
JL915
C931
C932
JL917
JL919
C943
C944
C946
C947
C952
C953
C954
C960
D902
D912
D913
D914
D915
D916
D922
D923
D925
D926
D927
D928
D929
D930
D931
D932
+
-
1
1
3
1
3
4
2
3
1
4
5
8
3
4
6
7
5
E
10
6
5
1
2
4
7
8
14
1
1
2
4
3
1
2
4
3
1
2
4
3
E
E
9
1
D940
IC920
D950
JS901
JS902
JS903
JS904
JS905
LF001
LINE FILTER
F900
Q901
Q920
PC901
PC902
PC903
EB901
EB902
VDR900
R900
R911
R913
CN900
CN901
R921
R922
R923
FR910
R924
R926
FH900
FH901
C903 (US, CND, TW)
C904 (Except US, CND, TW)
C904 (Except US, CND, TW)
TH900
A001
A002
C907
C911
C914
C917
C919
C924
C927
C940
C941
C951
JW902
JW903
JW904
JW905
JW907
JW908
JW909
D900
D901
JW910
JW913
JW914
JW915
JW917
JW918
D910
D911
JW920
D920
D924
T901
SUB MAIN
TRANSFORMER
T902
MAIN POWER
TRANSFORMER
IC910
C905 (US, CND, TW)
C906 (Except US, CND, TW)
C906 (Except US, CND, TW)
C900 (US, CND, TW)
C902 (Except US, CND, TW)
C902 (Except US, CND, TW)
C922 (Except US, CND, TW)
C923 (US, CND, TW)
C901 (Except US, CND, TW)
C937 (US, CND, TW)
C937 (US, CND, TW)
C920 (US, CND, TW)
C921 (Except US, CND, TW)
C921 (Except US, CND, TW)
C935 (US, CND, TW)
C936 (Except US, CND, TW)
C936 (Except US, CND, TW)
(Except US, CND, TW)
(US, CND, TW)
POWER BOARD
1-889-805-
11
(11)
(CHASSIS)
A
K
K
A
(CHASSIS)
A
A
A
A
A
A
A
A
K
K
K
K
K
K
K
K
K
A
SUB MAIN
BOARD
CN114
>03P
AC1
(AC IN)
A
K
A
K
K
A
A
A
K
K
K
A
A
A
K
K
A
K
A
B
C
D
E
F
1
2
3
4
5
6
7
8
9
10
11
(Page 18)
Ver. 1.1
SA-WCT770
SA-WCT770
23
23
4-7. SCHEMATIC DIAGRAM - POWER Board -
• See page 25 for IC Block Diagrams.
122.7
20.8
0
1.3
0.7
0
0
11.6
20.8
20.8
136.3
130.4
130.4
1.9
21.4
0
22.3
21.4
22
20.8
-3.2
20.8
20.1
-5.7
-1.9
0
0
31
3.3
3.3
0
29.2
2.4
4.1
3.1
31
32
4.1
3.1
2.4
2.4
19.9
7.5
10.7
1.9
0.01
C931
0.01
C930
470p
C925
250V
C900
0.22
250V
C901
0.22
250V
C937
0.1
250V
C905
0.001
250V
C906
470p
400V
0.0033
C911
C923
3300p
400V
C920
0.01
250V
C902
0.1
0.047
C943
0.1
C947
0.1
C946
2kV
C940
0.0047
0.1
C932
C944
0.01
4700p
C916
C954
0.01
0.047
C953
250V
C904
470p
0.01
C952
100V
100p
C929
250V
0.001
C903
C922
680p
2200p
C928
0.1
C960
C935
200V
330
50V
47
C927
10V
2200
C951
50V
10
C924
100V
47
C914
50V
2.2
C917
50V
1
C919
C936
450V
100
35V
1000
C941
CL916
CL951
CL903
CL904
CL930
CL910
CL902
CL901
CL929
CL912
CL913
CL950
CL914
CL922
CL928
CL921
CL927
CL905
CL915
CL923
CL900
CL953
CL917
CL911
CL925
CL920
CL918
CL940
CL926
CL941
CL924
CL943
CL963
CL960
CL964
CL942
CL909
CL962
CL952
2P
CN900
LIVE
1
NEUTRAL
3
9P
CN901
32V
1
32V
3
32V
4
GND
5
GND
6
GND
7
MAIN-ON
8
E4V
9
FMX-22SL
D940
+
–
D3SB60F3
D900
1
2
~
~
3
4
D1NL20U-TR2
D901
D1NL20U-TR2
D911
DA2J10100L
D926
DA2J10100L
D902
D1NL20U-TR2
D924
RK36LF-B3
D950
1F6G
D910
SARS10
D920
DA2J10100L
D923
DA2J10100L
D925
DA2J10100L
D929
D927
UDZSUSTE-176.2B
DZ2J24000L
D913
DZ2J330M0L
D930
UDZSUSTE-1730B
D914
D931
UDZSUSTE-1710B
D915
DZ2J200M0L
D922
DZ2J100M0L
D932
DZ2J051M0L
D916
DZ2J062M0L
D928
DZ2J100M0L
D912
EB901
EB902
F900
8
7
5
4
3
2
1
IC910
STR-A6159M
OCP
VCC
GND
FB
START_UP
DRAIN
DRAIN
4
3
1
2
MM1431CURE
IC940
NC
AK
Vr
ef
4
3
1
2
MM1431CURE
IC950
NC
AK
Vr
ef
1
3
4
5
6
7
IC920
D
S/GND
Vcc
OLP/SS
FB
OCP/BD
JL913
JL902
JL909
JL917
JL911
JL901
JL908
JL904
JL912
JL903
JL919
JL914
JL900
JL905
JL915
JL906
JS902
JS904
JS901
JS903
JS905
LF001
EL816M(B)(DTE-S)
PC902
1
2
4
3
EL816M(B)(DTE-S)
PC901
1
2
4
3
2SA1980-AT
Q901
LSCR523UBFS8TL
Q961
2SD1388TP-4
Q920
2SC5053T100Q
Q923
LTC044EUBFS8TL
Q960
LTC044EUBFS8TL
Q962
LTC044EUBFS8TL
Q921
LTA014EUBFS8TL
Q922
1/2W
FR910
1
R923
R926
820
47
R924
2W
R913
100k
R911
5.6
2.2
R914
27k
R946
10k
R953
4.7k
R915
10
R901
R949
1k
33k
R910
4.7k
R927
3.9k
R955
0
R928
4.7k
R903
1k
R929
100
R945
470
R951
1k
R941
4.7k
R925
4.7k
R931
68k
R932
1k
R930
1k
R940
R905
100k
2.2k
R956
100
R920
3.3k
R961
2.2k
R947
100
R963
3.3k
R960
22k
R962
10k
R904
2.2k
R944
4.7k
R902
470k
R942
680k
R916
1k
R950
R959
10k
470
R957
TH900
TH920
VDR900
C907
1k
R943
EL816M(B)(DTE-S)
PC903
1
4
3
400V
C921
0.0033
R900
1/2W
1M
ISOLATOR
ISOLATOR
IC910
POWER CONTROL
ISOLATOR
IC920
POWER CONTROL
IC940
SHUNT REGULATOR
IC950
SHUNT REGULATOR
(CHASSIS)
(CHASSIS)
POWER BOARD
2
SUB MAIN
>03S
CN114
(2/2)
BOARD
100k 3W (US, CND, TW)
82k 3W (Except US, CND, TW)
(US, CND, TW)
100p 250V (US, CND, TW)
470p 250V (Except US, CND, TW)
(US, CND, TW)
(US, CND, TW) (Except US, CND, TW)
(US, CND, TW)
(Except US, CND, TW)
5A 125V (US, CND)
T5AH 250V (TW)
T3.15AH 250V (Except US, CND, TW)
PATTERN
SPARK-GAP
CAM901
(US, CND, TW) (Except US, CND, TW)
2
NC
AC1
(AC IN)
STR-W6735N (US, CND, TW)
STR-W6765N (Except US, CND, TW)
1.2kV
1.5kV
(US, CND, TW)
0.33 2W (US, CND, TW)
0.47 2W (Except US, CND, TW)
R922
R921
0.22 2W (US, CND, TW)
0.36 2W (Except US, CND, TW)
DZ2J068M0L
(US, CND, TW)
(Except US, CND, TW)
Q921, 922
OVER LOAD PROTECT
REGULATOR
REGULATOR
B+ SWITCH
LINE
FILTER
POWER ON/OFF
CONTROL
POWER VOLTAGE
CONTROL
Q961, 962
2
NC
T901
TRANSFORMER
SUB POWER
1
2
3
4
5
6
7
8
9
10
14
2
MAIN POWER
1
T902
3
TRANSFORMER
4
13
7
6
5
10
9
8
11
12
10
11
12
13
14
15
G
16
H
17
I
18
F
1
C
J
D
6
E
2
B
3
A
4
5
7
8
9
E
E
Except US,
CND, TW
Except US,
CND, TW
(Page 21)
Ver. 1.1
SA-WCT770
SA-WCT770
24
24
4-9. SCHEMATIC DIAGRAM - SUB LED/SUB KEY Boards -
4-8. PRINTED WIRING BOARDS - SUB LED/SUB KEY Boards -
•
: Uses unleaded solder.
3
1
R900
R901
R904
CN901
D901
(ON/STANDBY LAMP)
3
1
CN002
C001
C002
S001
S002
CL004 CL005
SUB KEY BOARD
SUB MAIN
BOARD
CN111
>02P
D901
A
K
A
K
(RED)
(GRN)
A A
K K
1-889-803-
LINK
S001, 002
1-889-804-
SUB MAIN
BOARD
CN113
>01P
A
B
C
D
1
2
3
4
SUB LED BOARD
11, 12
(11, 12)
11, 12
(11, 12)
3P
CN901
LED(R)
1
LED(G)
2
GND
3
CL-165HR/HG5-D-T
D901
R901
82
R900
220
0
R904
SUB LED BOARD
CN111
SUB MAIN
>02S
(1/2)
BOARD
1
C
D
2
B
3
A
4
(RED)
(GRN)
(ON/STANDBY LAMP)
0.1
C002
0.1
C001
CL004
CL005
3P
CN002
1
GND
2
KEY_PAIR
3
KEY_POWER
S001
S002
LINK
SUB KEY BOARD
CN113
SUB MAIN
>01S
(1/2)
BOARD
(Page 20)
(Page 20)
(Page 18)
(Page 18)
Ver. 1.1
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