Sony STR-DH740 (serv.man2) Service Manual ▷ View online
STR-DH740
STR-DH740
37
37
5-22. PRINTED WIRING BOARD – DISPLAY Board –
• See page 14 for Circuit Boards Location. •
: Uses unleaded solder.
Ver. 1.2
1
A
B
C
D
E
F
G
H
I
J
K
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
VCC O
IC101
IC100
T100
1
8
3
CN100
C101
C102
C103
C105
C108
C109
S120
S121
C123
R124
R125
S101
S102
S103
S104
S105
S108
S109
S110
C126
C1
15
C113
24
2
25
1
CN102
1
54
2
53
50
38
ND100
VACUUM FLOURESCENT DISPLAY
1
3
CN101
D104
LP101
LP103
Q102
FB100
L100
FB102
D101
CL131
CL1
12
CL119
CL103
CL122
CL106
CL117
CL101
CL116
CL100
CL123
CL107
CL118
CL102
CL132
CL113
CL120
CL104
CL130
C
L111
CL133
CL114
CL126
CL109
CL108
CL115
CL129
CL1
10
CL121
CL105
CL128
R143
R102
R131
R122
R109
C106
CL137
R144
R134
R112
R136
R107
C130
C114
CL135
R138
C112
CL138
R137
R126
R1
13
R130
R121
R108
C132
C121
R145
R103
C129
CL136
R139
R132
R123
R110
C124
R147
R1
17
R101
C127
CL140
R104
C1
10
R129
R1
14
C116
R153
R127
R1
15
CL134
R135
R105
C104
CL125
R154
R146
R128
R1
16
R100
C100
R133
R111
C117
C107
JR
JR1
16
JR
JR1
17
JR JR100
JR111
JR
JR121
JR
JR131
JR
JR129
JR
JR104
JR
JR122
JR
JR133
JR
JR137
JR
JR127
JR
JR124
JR
JR130
JR
JR102
JR
JR135
JR
JR139
JR
JR1
19
JR
JR123
JR
JR136
JR
JR
JR
JR125
JR
JR118
JR
JR
JR115
JR
JR103
JR JR101
JR106
JR
JR
JR110
JR132
JR107
JR
JR1
13
JR
JR144
JR
JR145
JR
JR146
JR
JR147
JR148
JR138
JR108
JR150
JR151
JR
JR
JR
JR
JR
JR152
JR
JR
JR
JR
JR109
JR140
JR153
JR154
Q104
C135
CL139
D105
KA
JR
JR141
CL124
R155
CL141
JR
JR126
JR
JR134
JR
JR
JR114
JR
JR
JR143
JR
JR
JR156
JR157
JR160
JR161
JR
JR
JR162
D102
D103
C122
C125
JR
JR158
JR
JR159
JR
JR149
JR
JR155
R159
JR
JR128
Q103
E
E
Q105
E
C136
D
DIGITAL
BOARD
CN2101
(Page 22)
L
FRONT JACK
PWB BOARD
CN105
(Page 43)
M
POWER KEY
BOARD
CN103
(Page 45)
DISPLAY BOARD
1-887-711-
21
(21)
MASTER VOLUME
PURE DIRECT
INPUT SELECTOR
DISPLAY
DIMMER
INPUT MODE
NIGHT MODE
MUSIC
MOVIE
A.F.D.
T100
DC CONVERTER
TRANSFORMER
1
9
STR-DH740
STR-DH740
38
38
5-23. SCHEMATIC DIAGRAM – DISPLAY Board –
1
A
B
C
D
E
F
G
H
I
J
K
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
DISPLAY BOARD
3.3 3.3
3.5
3.5
3.5
7
0
4.7
0
4.7
5
5.3
3.3
4.6
0.1
5
0
3.5
3.5
3.5
VCC
OUT
GND
1
8
3
4
5
6
7
4
5
6
7
2
3
5
6
8
7
1
4
9
POWER_BUTTON
LED_STBY
LED_ON
AD1
DCAC_SIGNAL
Q102
SWITCHING
TRANSISTOR
QS5W2TR
L100
47uH
680
R137
C125
0.022
C124
4700p
C113
47
50V
C116
0.01
33k
R123
100
R122
100
R121
C112
0.1
C114
0.1
100
R131
47
R133
47
R132
C121
33p
C123
1000
6.3V
33k
R129
100
R136
R135
10
22k
R139
10k
R138
C132
3300p
C130
3300p
C129
3300p
C127
3300p
10k
R143
22k
R145
1
2
3
S120
1
2
3
CN100
8P
AD1
LED_STBY
POWER_BUTTON
DGND
NC
+3.3V_STBY
LED_ON
D101
DZ2J062M0L
2.2k
R127
2.2k
R128
1k
R130
4.7k
R126
FB100
1kohm
C110
2200p
S108
1k
R114
2.2k
R117
CL104
CL105
CL106
CL105
CL106
CL110
CL111
CL112
CL112
CL113
CL114
CL100
CL109
CL107
CL101
CL102
CL103
CL102
CL103
C104
33p
C107
0.1
C109
47
16V
C103
22
16V
C101
1
50V
C100
100p
100
R100
10k
R109
47k
R110
4.7k
R102
47k
R105
47k
R104
1k
R108
C108
1
50V
1k
R115
56k
R112
C106
33p
4.7k
R107
4.7k
R103
4.7k
R101
C102
10
50V
C105
22
16V
6.2k
R111
6.8k
R113
IC100
NJM2904M
1
1OUT
2
1-
3
1+
4
GND
5
2+
6
2-
7
2OUT
8
Vcc
100k
R116
C126
220
6.3V
SWITCHING
TRANSISTOR
CONTROL
SWITCHING
TRANSISTOR
CONTROL
VACUUM FLOURESCENT DISPLAY
ND100
2
53 54
49 50
47 48
45 46
43 44
42
40 41
38 39
1
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
AD1
POWER_BUTTON
DCAC_SIGNAL
FL_EN
FL_EN
FL_EN
LED_ON
LED_STBY
LED_STBY
CL115
CL116
CL117
CL118
CL119
CL120
CL121
CL122
CL123
CL124
CL126
CL116
CL117
CL118
CL119
CL120
CL121
CL122
CL123
CL124
CL126
CL129
CL130
CL130
CL136
CL138
CL131
CL132
CL133
CL134
CL135
CL133
CL134
CL135
CL137
CN102
25P
LED_STBY
LED_ON
FL_BK
+3.3V_DCDC
+7V (7807)
AGND
FL_EN
DCAC_SIGNAL
MIC_MUTE
DGND
PURE_DIRECT
DGND
+3.3V_STBY
FL_GND
FL_GND
+6V_DCDC
VOLUME_JOG
POWER_BUTTON
SIRC
AD2
AD1
INPUT_JOG
FL_LATCH
FL_DIN
FL_CK
CL139
CL140
CL140
FB102
0uH
Q104
2SB1710TL
C135
0.1
C136
10p
Q103
PDTC114ET
680
R153
470
R154
CL108
R124
8.2k
R125
8.2k
C115
10 50V
C117
0.1
100
R134
0
R155
1
2
3
CL125
CL128
CN101
3P
AGND
MIC_JACK
AGND
CL141
D105
SA10QA04
Q105
LED DRIVER
2PD601ART
220
R146
10k
R144
100k
R147
D104
SLI-325DCT31W
C122
10
D103
BAV99-215
D102
BAV99-215
0
R159
DGND
AGND
BK
LATCH
CLOCK
SI/DATA
VDD
VH +30V
SI/DA
TA
CLOCK
LA
TCH
BK
VDD
VH
PGND
LGND
F2
F2
F1
F1
5V Out
A.F.D.
S109
MOVIE
S110
MUSIC
S105
NIGHT MODE
S104
INPUT MODE
S102
DISPLAY
S101
PURE DIRECT
LED
(PURE DIRECT)
S103
DIMMER
INPUT
SELECTOR
S121
MASTER
VOLUME
VOLUME
G
DIGITAL
BOARD
(3/7)
CN2101
(Page 26)
M
FRONT
JACK PWB
BOARD
CN105
(Page 43)
L
POWER
KEY
BOARD
CN103
(Page 45)
PNA4823M03S0
IC101
REMOTE CONTROL
SIGNAL RECEIVER
IC101
AUDIO AMP
IC100
DC CONVERTER
TRANSFORMER
T100
Ver. 1.2
STR-DH740
STR-DH740
39
39
5-24. PRINTED WIRING BOARD – DCDC Board –
• See page 14 for Circuit Boards Location. •
: Uses unleaded solder.
1
A
B
C
D
E
F
G
H
I
J
K
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
R1965
IC1904
IC1902
IC1903
R1907
R191
1
R1914
R1915
C1915
R1916
C1916
R1918
R1919
C1922
C1925
R1926
C1926
R1927
C1927
R1928
C1930
C1931
C1932
R1933
C1935
C1936
C1937
R1940
R1942
C1942
R1943
R1944
R1945
R1946
R1947
R1948
L1902
L1903
L1904
L1907
L1908
L1909
D923
F941
1
4
CN941
C1905
C1907
C1906
C1961
C1966
C1910
C1965
C1912
C1960
C1967
C1911
C1962
C1976
F940
1
2
CN901
1
11
CN1901
C1947
C1945
C1946
CL948
CL946
CL942
CL941
CL943
C1971
C1951
C1957
C1972
C1955
C1949
C1952
C1956
C1973
C902
C907
C908
CL911
CL909
CL950
CL910
CL949
CL947
DCDC BOARD
(COMPONENT SIDE)
1-887-631-
11
(11)
DCDC BOARD
(CONDUCTOR SIDE)
1-887-631-
11
(11)
O
STANDBY
BOARD
CN940
(Page 41)
N
POWER
TRANSFORMER
(MAIN)
T901
(Page 41)
B
DIGITAL
BOARD
CN1500
(Page 22)
Ver. 1.2
STR-DH740
STR-DH740
40
40
5-25. SCHEMATIC DIAGRAM – DCDC Board –
1
A
B
C
D
E
F
G
H
I
J
K
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
DCDC BOARD
6
15
10
0 1.6
14 2.6
3.6 15
8
0 0.8
15 2.6
2
15
7
0.8 1.4
15 2.6
1
2
3
4
2
3
4
2
3
4
5
6
7
8
9
3
4
5
6
7
8
9
10
11
11
27k
R1940
1k
R1911
18k
R1944
22k
R1943
0
R1945
C1926
0.01
C1931
0.1
7.5k
R1916
C1916
3300p
1k
R1907
C1952
22
C1973
22
0.1
C1956
C1925
0.01
C1930
0.1
C1915
3300p
7.5k
R1915
1k
R1914
C1927
0.01
C1932
0.1
C1922
2200p
10k
R1919
1k
R1918
W1900
CN941
4P
R3 AC (Yellow)
NC
CENTER
R3 AC (Green)
CL946
F940
3.15A 250V
F941
3.15A 250V
CL941
CL942
C907
0.047
C908
0.047
C902
0.1
CL943
D923
D5SBA60-F
L1908
10uH
L1907
10uH
L1903
10uH
L1902
10uH
L1904
10uH
0
R1942
C1936
0.1
22
R1927
C1935
0.1
22
R1926
C1937
0.1
22
R1928
25V
C1906
100
C1967
10
C1962
10
C1911
0.1
25V
C1905
100
C1966
10
C1961
10
C1910
0.1
25V
C1907
100
C1965
10
C1960
10
C1912
0.1
C1946
100
10V
C1949
22
C1972
22
0.1
C1955
C1945
100
10V
CN1901
11P
NC
+6V
+6V
1
+6V
+DCDC_NW
+DCDC_NW
+3.6V
+3.6V
+2V
+2V
+1.8V
+1.8V
+DCDC_NW
+3.6V
+3.6V
+2V
+2V
+1.8V
+1.8V
C1976
3300
25V
CL947
68k
R1946
L1909
10uH
0
R1948
4.7
R1933
C1942
0.001
12k
R1947
C1951
22
C1971
22
0.1
C1957
C1947
100
10V
W1901
CL949
CL909
CL950
CL910
CL911
1
2
2
CN901
2P
STBY GND
STBY GND
STBY GND
IC1902
BD9329AEFJ-BZSE2
IC1904
BD9329AEFJ-BZSE2
IC1903
BD9329AEFJ-BZSE2
1
BOOT
2
VIN
3
SW
4
GND
5
FB
6
COMP
7
EN
8
SS
9
1
BOOT
2
VIN
3
SW
4
GND
5
FB
6
COMP
7
EN
8
SS
9
1
BOOT
2
VIN
3
SW
4
GND
5
FB
6
COMP
7
EN
8
SS
9
+6V REG.
IC1904
+3.6V REG.
IC1902
+2V REG.
IC1903
N
POWER
TRANSFORMER
(MAIN)
T901
(Page 42)
O
DIGITAL
BOARD
(3/7)
CN1500
(Page 26)
F
STANDBY
BOARD
CN940
(Page 42)
10k
R1965
Ver. 1.2
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