Sony SA-WCT380 / SA-WCT381 Service Manual ▷ View online
SA-WCT380/WCT381
SA-WCT380/WCT381
21
21
4-6. SCHEMATIC DIAGRAM - SUB POWER Board -
• See page 22 for IC Block Diagrams.
Note: When C902 to C908, C914, C915, C935, C938, C939, C967, C970, C976 to C978, C980, C988, D901, L966, LF901, R944,
TH901 and VDR901 on the SUB POWER board are replaced, refer to “BOND FIXATION OF ELECTRIC PARTS” on page 6.
0.2
0.8
21.4
0
161
21.4
22
22
6.6
0
0.8
26.5
25.5
25.5
2.1
27.8
0
28
3.2
0
3P
CN901
1
LIVE
3
NEUTRAL
CN902
1
/TH_DET
3
PVDD_28V
4
PVDD_28V
5
PVDD_28V
6
PVDD_GND
7
PVDD_GND
8
PVDD_GND
UN12V
10
A_GND
JL973
JL974
JL902
JL903
JL975
JL976
JL904
JL936
JL977
JL901
JL937
EL816S1(B)(TA)(DTE-S)
PH930
1W
R914
0.33
IC930
D/ST
1
S/OCP
2
VCC
3
GND
4
FB/OLP
5
BD
6
NF
7
MM1431FNRE
IC931
K
1
VREF
2
A
3
TH901
TH902
JL978
JL979
JS902
310V
C905
0.33
310V
C904
0.22
E
ET931
250V
C908
0.0022
250V
C903
0.001
250V
C902
0.001
250V
C906
0.0022
VDR901
250V
5A
F901
310V
C988
0.1
310V
C907
0.33
~
+
–
~
D3SB60F3
D901
450V
C915
100
200V
C914
330
400V
0.0033
C939
R944
SARS10
D938
RR264M-400
D937
RR264M-400
D936
0
R997
R932
R934
4.7
R954
4.7
R953
0
R955
KDZTR18B
D972
UDZSUSTE-1730B
D931
UDZSUSTE-1730B
D935
2.2k
R935
DZ2J15000L
D932
0.1
C936
LTC044EUBFS8TL
Q931
10
C933
C932
4700p
2.2
C934
47k
R936
100
R945
27k
R938
UDZSUSTE-1730B
D941
25V
330
C941
DZ2J180M0L
D930
CRH02(T5R,SONY,XM)
D942
4.7k
R937
DZ2J24000L
D939
4.7
R947
DZ2J180M0L
D934
2SC5053T100Q
Q930
1k
R965
1k
R987
E
ET932
RB068L100TE25
D967
250V
2.5A
F931
UDZSUSTE-1730B
D973
FMX-22SL
D965
250V
C965
0.0047
0.1
C968
35V
2200
C967
25V
1000
C970
47k
R977
1.5k
R976
4.7k
R978
220k
R971
0.01
C971
50V
C978
10
R952
1k
R951
68k
2PA1576R-115
Q950
Q952
LTC044EUBFS8TL
C940
470p
10
C937
C935
2200p
C938
680p
0.1
C930
4.7uH
L967
2.2uH
L966
0.5W
R901
1.5M
LF901
9
ISOLATOR
SHUNT REGULATOR
IC931
(CHASSIS)
CN7201
BOARD
SUB MAIN
>02S
IC930
(CHASSIS)
SUB POWER BOARD
5
9
POWER
12
11
1
10
6
TRANSFORMER
4
3
T901
2
7
8
14
13
Q950, 952
THERMAL DETECT
C977
47
35V
C976
47
35V
10P
2
NC
C980
47
35V
250V
(US, CND)
(US, CND)
AC1
(AC IN)
(HEATSINK)
0.47 1W (US, CND)
R932
2.2 1W (Except US, CND)
0.15 2W (US, CND)
R934
0.22 2W (Except US, CND)
2
NC
(Except US, CND)
(US, CND)
(Except US, CND)
(US, CND)
150p (US, CND)
C931
180p (Except US, CND)
(US, CND)
(Except US, CND)
1.5kV
1.5kV
3
4
2
1
LINE FILTER
LND001
SPARK-GAP
PATTERN
(Except US, CND)
(US, CND)
POWER CONTROL
STR-Y6735 (US, CND)
STR-Y6766B (Except US, CND)
REGULATOR
PROTECT DETECT
47k 3W (US, CND)
R944
100k 3W (Except US, CND)
10
11
12
13
1
6
2
3
4
5
7
8
9
14
G
F
C
D
E
B
A
(Page 19)
Ver. 1.1
SA-WCT380/WCT381
SA-WCT380/WCT381
22
22
• IC Block Diagrams
– SUB MAIN Board –
IC7104 SI-3010KM-TLA
IC7104 SI-3010KM-TLA
IC7105 BD9E102FJ-GE2
IC7108 MM3411A33URE
IC7203 TAS5614LA
IC7402 PST8429UL
1
VC
TSD
2
VIN
3
GND
4
VOUT
5
ADJ
+
–
REF
BOOT 1
VIN 2
AGND 4
EN 3
COMP
6
FB
ERR
PWM
SLLM
3V
5
PGND
7
SW
8
BOOTREG
DRIVER
LOGIC
UVLO
TSD
OSC
VREG3
SLOPE
5V
VREG
SCP
OVP
OCP
OVP
OCP
SOFT
START
+
+
–
+
–
–
VOUT
3
CE 1
GND 2
VDD
4
+
–
VOLTAGE
REFERENCE
CURRENT
LIMIT
BIAS
I2C SERIAL
CONTROL
INTERFACE
CLOCK, PLL,
AND
SERIAL DATA
INTERFACE
PWM_HPM_L 1
PWM_HPP_L 2
PWM_HPM_R 3
PWM_HPP_R 4
PLL_FLTM 6
PLL_FLTP 7
LRCLK 22
SCLK 23
SDIN1 24
SDIN2 25
SDIN3 26
SDIN4 27
SDIN2 25
SDIN3 26
SDIN4 27
VR_DIG 28
RESET 16
HP_SEL 17
PDN 18
MUTE
ASEL_EMO2 10
EMO1 15
DVDD2_CORE 14
DVSS2_CORE 13
AVDD 9
VR_ANA 8
OSC_RES 12
MCLK 11
19
SDA 20
AVSS 5
DEVICE
CONTROL
DIGITAL
AUDIO
PROCESSOR
POWER
SUPPLY
SUPPLY
SCL 21
AVSS_PWM
51
AVDD_PWM
50
PWM_P_1
39
PWM_M_1
38
PWM_P_2
41
PWM_M_2
40
PWM_P_3
43
PWM_M_3
42
N.C.
45
N.C.
44
N.C.
47
N.C.
46
PWM_P_4
49
PWM_M_4
48
N.C.
54
N.C.
53
N.C.
56
N.C.
55
LRCLKO
31
SCLKO
30
PSVC
33
VALID
37
TEST
32
SDOUT
29
VR_RWM
52
DVSS1_CORE
36
DVDD1_CORE
35
BKND_ERR
34
PWM
SECTION
IC7202 TAS5534DGGR
GVDD_AB 1
VDD 2
OC_ADJ 3
RESET 4
INPUT_A 5
PVDD_CD
OUT_C
31
PVDD_CD
30
32
PVDD_CD
29
GND
33
INPUT_B 6
C_START 7
GND 9
GND 11
GND 10
GND 12
AVDD 13
INPUT_C 14
INPUT_D 15
OTW 17
PROTECTION
&
I/O LOGIC
+
–
–
+
–
–
+
–
–
TEMP
SENSE
STARTUP
CONTROL
AVDD
DVDD 8
DVDD
POWER-UP
RESET
CB3C OVER-LOAD
PROTECTION
UVP
GATE-
DRIVE
DRIVE
+
–
–
GATE-
DRIVE
DRIVE
GND
OUT_B
34
35
PVDD_AB
38
GND
42
GND
41
BST_A
44
BST_B
43
GATE-
DRIVE
DRIVE
PVDD_AB
36
PVDD_AB
37
OUT_A
39
OUT_A
40
OUT_D
27
GND
26
GND
25
BST_C
24
BST_D
23
OUT_D
28
PWM & TIMING
CONTROL
ANALOG
LOOP FILTER
ANALOG
LOOP FILTER
ANALOG
LOOP FILTER
ANALOG
LOOP FILTER
PWM & TIMING
CONTROL
PWM & TIMING
CONTROL
PWM
RECEIVER
PWM
RECEIVER
PWM
RECEIVER
PWM
RECEIVER
PWM & TIMING
CONTROL
GATE-
DRIVE
DRIVE
CLIP 18
FAULT 16
M3 21
M2 20
M1 19
GVDD_CD 22
BST_X
GVDD_X
AVDD
DVDD
GVDD_X
AVDD
DVDD
GND 1
VDD 2
+
–
–
VREF
OUT
4
CD
3
– SUB POWER Board –
IC930 STR-Y6735 (US and Canadian models)
IC930 STR-Y6766B (Except US and Canadian models)
IC930 STR-Y6735 (US and Canadian models)
IC930 STR-Y6766B (Except US and Canadian models)
D/ST 1
S/OCP 2
VCC 3
GND 4
BD 6
FB/OLP 5
STARTUP
LOGIC
DRIVER
LATCH
OVERCURRENT
PROTECTION/
BOTTOM-SKIP
BOTTOM-SKIP
UNDER VOLTAGE
LOCK OUT/
REGULATOR/
CONSTANT CURRENT
FEEDBACK/
STANDBY
OVERLOAD
PROTECTION
BOTTOM
DETECTION
NF 7
OSCILLAOTR
Ver. 1.1
23
SA-WCT380/WCT381
SECTION 5
EXPLODED VIEWS
Note:
• -XX and -X mean standardized parts, so
• -XX and -X mean standardized parts, so
they may have some difference from the
original one.
original one.
• Items marked “*” are not stocked since
they are seldom required for routine ser-
vice. Some delay should be anticipated
when ordering these items.
vice. Some delay should be anticipated
when ordering these items.
• The mechanical parts with no reference
number in the exploded views are not sup-
plied.
plied.
• Color Indication of Appearance Parts Ex-
ample:
KNOB, BALANCE (WHITE) . . . (RED)
Parts Color Cabinet’s Color
5-1. BACK PANEL SECTION
• Rear view
The components identifi ed by mark 0
or dotted line with mark 0 are critical for
safety.
Replace only with part number specifi ed.
or dotted line with mark 0 are critical for
safety.
Replace only with part number specifi ed.
Les composants identifi és par une marque
0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce por-
tant le numéro spécifi é.
0 sont critiques pour la sécurité.
Ne les remplacer que par une pièce por-
tant le numéro spécifi é.
sub AMP section
speaker cabinet section
1
1
2
1
4-874-614-62 SCREW (1) (3.5X16), TAPPING
2
2-682-469-11 FOOT (SW) (4 pieces, 1 set)
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
24
SA-WCT380/WCT381
5-2. SUB AMP SECTION
51
A-2063-689-A SUB POWER BOARD, COMPLETE (US, CND)
51
A-2063-690-A SUB POWER BOARD, COMPLETE
(Except US, CND)
52
A-2076-762-A SUB MAIN BOARD, COMPLETE (SV) (See Note 1)
53
3-087-053-01 +BVTP 2.6 (3CR) (L=8 mm)
54
A-2063-687-A SUB KEY BOARD, COMPLETE
55
4-549-776-01 BUTTON
(POWER-CZ2)
56
4-559-905-01 COVER BACK (CZ2)
0 57
4-966-267-12 BUSHING (FBS001), CORD
0 AC1
1-834-966-42 POWER-SUPPLY CORD
(AEP, RU, E3, LA, SP, PX)
0 AC1
1-835-068-21 CORD, POWER (AUS)
0 AC1
1-837-308-12 CORD, POWER-SUPPLY (US, CND)
0 AC1
1-837-312-11 CORD, POWER-SUPPLY (AR)
0 AC1
1-839-940-21 POWER-SUPPLY CORD (TH)
0 AC1
1-839-999-21 POWER-SUPPLY CORD (UK, EA3)
0 ACP1
1-569-008-33 ADAPTOR, CONVERSION (PX)
0 ACP1
1-785-504-21 ADAPTOR, CONVERSION (LA)
0 ACP2
1-770-019-72 ADAPTOR, CONVERSION PLUG 3P (SV)
(SP for Hong Kong only) (See Note 2)
FFC1
1-970-613-11 WIRE KIT (SW FFC) (24 pin)
RF1
1-492-348-11 RF MODULATOR (SWA12-4V RX) (See Note 3)
#1
7-685-646-71 SCREW +BVTP 3X8 TYPE2 IT-3
#2
7-685-146-11 SCREW +P 3X8 TYPE2 NON-SLIT
#3
7-685-646-79 SCREW +BVTP 3X8 TYPE2 IT-3
Ref. No.
Part No.
Description
Remark
Ref. No.
Part No.
Description
Remark
Note 1: When the complete SUB MAIN board is replaced, refer to
“NOTE OF REPLACING THE IC7203 ON THE SUB MAIN
BOARD AND THE COMPLETE SUB MAIN BOARD” and
“NOTES ON THE WIRELESS CONNECTION (LINK) AF-
TER REPAIRS ARE COMPLETE” on page 5.
BOARD AND THE COMPLETE SUB MAIN BOARD” and
“NOTES ON THE WIRELESS CONNECTION (LINK) AF-
TER REPAIRS ARE COMPLETE” on page 5.
AC1
A
A
not
supplied
supplied
not
supplied
supplied
not supplied
not supplied
not supplied
not supplied
not supplied
not supplied
not supplied
not supplied
not supplied
#1
#1
#3
#3
#3
#3
#3
#3
#1
#2
#1
#1
#1
#1
#1
#1
#1
not supplied
RF1
FFC1
51
52
56
55
57
54
53
53
ACP1
(LA, PX)
ACP2
(SP for Hong Kong)
(See Note 2)
Note 2: Ref. No. ACP2 is a service part used only for the Singapore
model sold in Hong Kong.
Ver. 1.2
Note 3: When the RF modulator (Ref. No. RF1) is replaced, refer to
“NOTES ON THE WIRELESS CONNECTION (LINK) AF-
TER REPAIRS ARE COMPLETE” on page 5.
TER REPAIRS ARE COMPLETE” on page 5.
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