DOWNLOAD Sony SA-WCT370 Service Manual ↓ Size: 2.05 MB | Pages: 38 in PDF or view online for FREE

Model
SA-WCT370
Pages
38
Size
2.05 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
sa-wct370.pdf
Date
PREV: Sony MHC-V5 (serv.man2) Service Manual

Sony SA-WCT370 Service Manual ▷ View online

SA-WCT370
SA-WCT370
21
21
4-7.  SCHEMATIC  DIAGRAM - POWER Board -
 • See page 23 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)
82k 3W (Except US, CND)
(US, CND)
(Except US, CND)
100p 250V (US, CND)
470p 250V (Except US, CND)
(US, CND)
(US, CND)
(Except US, CND)
(US, CND)
(Except US, CND)
5A 125V (US, CND)
T3.15AH 250V (Except US, CND)
PATTERN
SPARK-GAP
CAM901
(US, CND)
(Except US, CND)
2
NC
AC1
(AC IN)
STR-W6735N (US, CND)
STR-W6765N (Except US, CND)
1.2kV
1.5kV
(Except US, CND)
(US, CND)
0.33 2W (US, CND)
0.47 2W (Except US, CND)
R922
R921
0.22 2W (US, CND)
0.36 2W (Except US, CND)
DZ2J068M0L
(US, CND)
(Except US, CND)
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
(Page 19)
Ver. 1.2
SA-WCT370
SA-WCT370
22
22
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
1-893-250-
11
(11)
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)
3P
CN901
LED(R)
1
LED(G)
2
GND
3
CL-165HR/HG5-D-T
D901
R901
82
R900
82
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 18)
(Page 18)
(Page 16)
(Page 16)
Ver. 1.1
SA-WCT370
23
•  IC Block Diagrams
– SUB MAIN Board –
IC101  PST8435UL
GND 1
VDD 2
+
–
VREF
OUT
4
CD
3
IC103  TC74LCX74FT (EKJ)
14
1 2 3
4 5 6
7
13 12 11
10
9 8
VCC
GND
CK
CLR
CK
CLR
Q
PR
Q
Q
PR
Q
D
D
IC104  CXD9981TN
1
2
3
4
5
6
INTERNAL PULLUP
RESISTORS TO VREG
PROTECTION
AND
I/O LOGIC
OVERLOAD
PROTECTION
PWM
RCV.
CTRL
TIMING
GATE
DRIVE
BTL/PBTL-CONFIGURATION
PULLDOWN RESISTOR
44
43
42
41
40
39
38
37
35
27
16
PWM
RCV.
CTRL
TIMING
GATE
DRIVE
BTL/PBTL-CONFIGURATION
PULLDOWN RESISTOR
26
33
34
32
31
30
8
PWM
RCV.
CTRL
TIMING
GATE
DRIVE
BTL/PBTL-CONFIGURATION
PULLDOWN RESISTOR
29
24
25
23
36
18
19
20
21
22
PWM
RCV.
CTRL
TIMING
GATE
DRIVE
BTL/PBTL-CONFIGURATION
PULLDOWN RESISTOR
27
28
POWER
ON
RESET
TEMP.
SENSE
UNDER-
VOLTAGE
PROTECTION
4
VREG
I-SENSE
13
14
15
17
12
7
11
9
10
M3
M2
M1
PWM_C
/RESET_CD
GVDD_B
/DTW
NC
NC
/SD
PWM_A
/RESET_AB
GND
AGND
VREF
PWM_B
OC_ADJ
PWM_D
NC
NC
VDD
GVDD_C
NC
BST_D
GVDD_D
OUT_D
PVDD_D
PVDD_D
GND_C
GND_D
BST_C
PVDD_C
OUT_C
OUT_B
PVDD_B
BST_B
GND_A
GND_B
PVDD_A
PVDD_A
OUT_A
GVDD_A
BST_A
NC
4
SA-WCT370
24
IC105  CXD9843AR
IC106  MM3411A18URE
IC108  MM3411A33URE
IC109  SI-3010KM-TLA
12
11
10
9
8
7
6
5
4
3
VSUBC
XVSS
OUTR2
VSSR
OUTR1
VDDR
VSSL
VSSR
OUTL2
OUTL1
VSSL
VDDL
2
1
PWM
CLOCK
GENERATOR
(SECONDARY)
CLOCK
GENERATOR
(PRIMARY)
  
31
29
25 OVFFLAGL
26 SFLAG
27 INIT
30
S 
g P
GAIN
CONTROL
INIT/
MUTE
SAMPLING
RATE
CONVERTER
FILTER &
LOW CUT
FILTER
LINER
INTERPOLATOR
'6
48
XFSOIN
47
XVDD
HPVDDL
46
45
HPOUTL1
HPVSSL
44
43
HPOUTL2
HPVDDR
42
41
HPOUTR1
HPVSSR
40
HPOUTR2
39
37
FSOCKO
38
FSOI
13
XOVSS
14
XFSOOUT
15
XOVDD
16
DVDD
17
DVSS
18
NSPMUTE
19
SOFTMUTE
20
PGMUTE
SERIAL
CONTROLLER
21
SCDT
22
SCSHIFT
23
SCLA
TCH
24
OVFFLAGR
28 MCKSEL
32 BFVDD
33 BFVSS
34 TEST
35 DVDD
36 XFSIIN
LRCK
BCK
DATA
VOUT
3
CE 1
GND 2
VDD
4
+
–
VOLTAGE
REFERENCE
CURRENT
LIMIT
BIAS
1
VC
TSD
2
VIN
3
GND
4
VOUT
5
ADJ
+
–
REF
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