Sony STR-DH550 / STR-DH750 Service Manual ▷ View online
STR-DH550/DH750
STR-DH550/DH750
33
33
5-18. SCHEMATIC DIAGRAM – HDMI Board –
• See page 21 for Waveforms. • See page 43 for IC Block Diagrams. • See page 50 for IC Pin Function Descriptions.
Ver. 1.1
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
HDMI BOARD
1.2 1.2 1.2 1.2 1.2 1.2 3.3 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2 1.2
3.3 1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
3.3
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.2
1.6
1.6
3.3
3.3
3.3
0
0
0
0
2
0.5
2.2
0
0
0
1.7 0
0
0
1.7
0
3.3
1.2
1.5
3.3
1.5
0
0
0
5
0
0
5
5
5
1.2 3
0
0
0
0
0
0
0
0
0
0
0
0
3.3
1.2
1.5
1.5
1.6
1.6
1.6
1.5
0.6
0.6
1.2
1.2
1.2
1.2
1.2
0
0
5
6
5.5
0.8
1.2
2
3.3
6
5
3.1
3.3
3.3
3.3
0
0
0
3.3
5
5
0.8
0.8
1.3
5
3
6
3
IN4_D2+
IN4_D2-
IN4_D1+
IN4_D1-
IN4_D0+
IN4_D0-
IN4_CK+
IN4_CK-
IN3_CK-
IN3_CK+
IN3_D0-
IN3_D0+
IN3_D1-
IN3_D1+
IN2_CK-
IN3_D2+
IN3_D2-
IN2_CK+
IN2_D0-
IN2_D0+
IN2_D1-
IN2_D1+
IN2_D2-
IN2_D2+
IN2_D0-
IN2_D0+
IN2_D1-
IN2_D1+
IN2_D2-
IN2_D2+
IN4_SDA
IN1_CK-
IN1_CK+
IN1_D0-
IN1_D0+
IN1_D1-
IN1_D1+
IN1_D2-
IN1_D2+
IN1_CK+
IN1_D0-
IN1_D0+
IN1_D1-
IN1_D1+
IN1_D2-
IN1_D2+
IN3_HPD
IN3_SCL
IN3_SDA
IN1_SDA
IN1_HPD
HDMI_WS
HDMI_SCK
HDMI_SD0
HDMI_MCK
HDMI_SD1
HDMI_SD2
HDMI_SD3
HDMI_SPDIF
IN4_SDA
IN4_CK-
IN4_CK+
IN4_D0-
IN4_D0+
IN4_D1-
IN4_D1+
IN4_D2-
IN4_D2+
IN4_HPD
IN2_SDA
SF_CS
SF_SCK
SF_SO
SF_SI
HDMI_MUTE
HDMI_SCL
HDMI_SDA
HDMI_INT
HDMI_RST
HDMI_SDA
HDMI_INT
HDMI_RST
IN2_HPD
IN2_SCL
OUT0_SCL
OUT0_SDA
OUT0_SDA
OUT0_HPD
OUT0_CK-
OUT0_CK+
OUT0_D0-
OUT0_D0+
OUT0_D1-
OUT0_D1+
OUT0_D2-
OUT0_D2+
IN3_5VP
IN2_5VP
SF_SO
SF_CS
SF_SI
SF_SCK
OUT0_D2+
OUT0_D2-
OUT0_D1+
OUT0_D1-
OUT0_D0+
OUT0_D0-
OUT0_CK+
OUT0_CK-
OUT0_HPD
OUT0_SDA
OUT0_SCL
CEC
5VPWR_A
ARC_SPDIF
IN4_SCL
IN4_5VP
MHL_PCONT
MHL_OVC
IN4_HPD
IN1_SCL
IN4_5VP
IN4_SCL
0.1u
C3607
10u
C3609
220u 6.3V
C3608
C3605
0.1u
C3606
2.2u
C3603
0.1u
C3604
2.2u
C3602
10u
C3597
0.1u
C3596
0.1u
C3598
0.1u
C3530
1u
C3578
0.001u
C3518
0.1u
C3519
0.1u
C3526
0.1u
C3528
0.1u
C3529
0.1u
C3542
0.1u
C3543
10u
C3544
0.1u
C3545
10u
C3557
0.1u
C3564
10u
C3565
10u
C3554
0.1u
C3555
0.1u
C3562
10u
C3563
10u
C3548
0.1u
C3546
0.1u
C3541
10u
C3538
10u
C3540
0.1u
C3536
0.1u
R3620
100
R361
1
220
R3828
10k
R3804
47
R3829
300K
C3599
0.047u
R3612
220
R3613
220
R3615
220
R3616
47
R3618
220
R3623
100
R3626
100
R3627
100
R3628
10
R3629
100
R3630
0
C3553
0.1u
C3552
0.1u
10u
C3560
C3549
3p
C3550
3p
C3361
1u
C3531
1u
C3359
1u
C3364
1u
C3363
1u
C3566
220u
6.3V
C3567
220u
6.3V
CL3549
CL3547
CL3546
CL3548
CL3518
CN3513
3P
1
6V
2
3.3V
3
2V
CN3504
19P
1
DATA2+
2
DATA2 SHIELD
3
DATA2-
4
DATA1+
5
DATA1 SHIELD
6
DATA1-
7
DATA0+
8
DATA0 SHIELD
9
DATA0-
10
CLOCK+
11
CLOCK SHIELD
12
CLOCK-
13
CEC
14
RESERVE(NC)
15
SCL(5V)
16
SDA(5V)
17
DDC/CEC GND
18
+5V POWER
19
HOT PLUG DET
CN3200
19P
1 DATA2+
2 DATA2 SHIELD
3 DATA2-
4 DATA1+
5 DATA1 SHIELD
6 DATA1-
7 DATA0+
8 DATA0 SHIELD
9 DATA0-
2 DATA2 SHIELD
3 DATA2-
4 DATA1+
5 DATA1 SHIELD
6 DATA1-
7 DATA0+
8 DATA0 SHIELD
9 DATA0-
10 CLOCK+
11 CLOCK SHIELD
12 CLOCK-
13 CEC
14 RESERVE(NC)
15 SCL(5V)
16 SDA(5V)
17 DDC/CEC GND
18 +5V POWER
19 HOT PLUG DET
11 CLOCK SHIELD
12 CLOCK-
13 CEC
14 RESERVE(NC)
15 SCL(5V)
16 SDA(5V)
17 DDC/CEC GND
18 +5V POWER
19 HOT PLUG DET
D3501
CES521
+6V
+6V
FB3504
0uH
FB3501
0uH
FB3505
0uH
IC3511
MM1839A50NRE
1 CONT
2 GND
3 NC
3 NC
4
VOUT
5
VIN
IC3513
MM3411A50NRE
1 VDD
2 GND
2 GND
3 CE
4
NC
5
VOUT
IC3519
BD00HC5WEFJ-E2
1
2
3
4
3
4
5
6
7
8
9
IC3518
TPS2553DBVR
1
Vin
2
GND
3
EN
4 FAULT
5 ILIM
6 Vout
IC3512
W25Q16CVSSIG-R
1 /CS
2 DO
3 /WP
4 GND
5
DI
6
SCK
7
/HOLD
8
VCC
IC3514
SII9573CTUC
1
D14
2
D15
3
D16
4
D17
5
D18
6
D19
7
DE
8
VSYNC
9
HSYNC
10
R0XC-
11
R0XC+
12
R0X0-
13
R0X0+
14
R0X1-
15
R0X1+
16
R0X2-
17
R0X2+
18
AVDD12
19
AVDD33
20
R1XC-
21
R1XC+
22
R1X0-
23
R1X0+
24
R1X1-
25
R1X1+
26
R1X2-
27
R1X2+
28
R2XC-
29
R2XC+
30
R2X0-
31
R2X0+
32
R2X1-
33
R2X1+
34
R2X2-
35
R2X2+
36
AVDD12
37
CVCC12
38
AVDD33
39
R3XC-
40
R3XC+
41
R3X0-
42
R3X0+
43
R3X1-
44
R3X1+
45 R3X2-
46 R3X2+
47 R4XC-
48 R4XC+
49 R4X0-
50 R4X0+
51 R4X1-
52 R4X1+
53 R4X2-
54 R4X2+
55 AVDD12
56 AVDD33
57 RX5C-
58 RX5C+
59 RX50-
60 RX50+
61 RX51-
62 RX51+
63 RX52-
64 RX52+
65 CVCC12
66 CSCL
67 CSDA
68 INT
69 RESET
70 TPWR_CI2CA
71 CEC_A1
72 CEC_A0WAKEUP
73 DSDA6
74 DSCL6
75 LPSVCC33
76 DSDA0
77 DSCL0
78 CBUS_HPD0
79 R0PWR5V
80 DSDA1
81 DSCL1
82 CBUS_HPD1
83 R1PWR5V
84 DSDA2
85 DSCL2
86 CBUS_HPD2
87 R2PWR5V
88 DSDA3
46 R3X2+
47 R4XC-
48 R4XC+
49 R4X0-
50 R4X0+
51 R4X1-
52 R4X1+
53 R4X2-
54 R4X2+
55 AVDD12
56 AVDD33
57 RX5C-
58 RX5C+
59 RX50-
60 RX50+
61 RX51-
62 RX51+
63 RX52-
64 RX52+
65 CVCC12
66 CSCL
67 CSDA
68 INT
69 RESET
70 TPWR_CI2CA
71 CEC_A1
72 CEC_A0WAKEUP
73 DSDA6
74 DSCL6
75 LPSVCC33
76 DSDA0
77 DSCL0
78 CBUS_HPD0
79 R0PWR5V
80 DSDA1
81 DSCL1
82 CBUS_HPD1
83 R1PWR5V
84 DSDA2
85 DSCL2
86 CBUS_HPD2
87 R2PWR5V
88 DSDA3
89
DSCL3
90
CBUS_HPD3
91
R3PWR5V
92
DSDA4
93
DSCL4
94
CBUS_HPD4
95
R4PWR5V
96
RSVDL
97
DSDA5
98
DSCL5
99
CBUS_HPD5
100
R5PWR5V
101
SBVCC5V
102
VCC33OUT
103
MHL_CD0/GPIO0
104
MHL_CD1/GPIO1
105
TX_HPD0
106
TXDSDA0
107
TXDSCL0
108
TX_HPD1
109
TXDSDA1
110
TXDSCL1
111
APLL12
112
XT
AL
VCC33
113
XT
ALOUT
114
XT
ALIN
115
XT
ALGND
116
CVCC12
117
SS/GPIO2
118
SCLK/GPIO3
119
SD0/GPIO4
120
SD1/GPIO5
121
WS0_OUT/DR0
122
SCK0/DDCK
123
IOVCC33
124
SD0_0/DL0
125
MCLK
126
SD0_1/DR1/GPIO6
127
SD0_2/DL1/GPIO7
128
SD0_3/DR2/GPIO8
129
MUTEOUT/GPIO9
130
SPDIF0_OUT/DL2
131
WS0_IN/GPIO1
1
132
SCK0_IN/GPIO10
133
134
135
136
SD0_IN/SPDIFO_IN
SCK1_IN/SCK1_OUT
WS1_IN/WS1_OUT
SD1_IN/SD1_OUT/SPDIF1_IN/SPDIF1_OUT
137
ARC0
138
ARC1
139
CVCC12
140
TPVDD12
141
TDVDD12
142
T1XC-
143
T1XC+
144
T1X0-
145
T1X0+
146
T1X1-
147
T1X1+
148
T1X2-
149
T1X2+
150
TPVDD12
151
TDVDD12
152
T0XC-
153
T0XC+
154
T0X0-
155
T0X0+
156
T0X1-
157
T0X1+
158
T0X2-
159
T0X2+
160
CVCC12
161
D0
162
D1
163
D2
164
D3
165
D4
166
D5
167
D6
168
D7
169
D8
170
D9
171
D10
172
IDCK
173
IOVCC33
174
D11
175
D12
176
D13
JL3555
JL3553
JL3550
JL3551
JL3547
JL3548
JL3549
JL3548
JL3549
JL3554
JL3228
JL3225
JL3531
JL3530
L3500
10uH
RB3204
0.05
RB3205
0.05
R3606
0
130k
R3624
10k
R3594
0
R3502
0
R3503
100
R3621
R3632
0
C3551
10u
10
R3596
10
R3598
10
R3601
1u
C3534
0
R3602
4.7k
R3595
4.7k
R3597
4.7k
R3599
4.7k
R3600
47k
R3842
4.7u
C3525
4.7u
C3527
4.7u
C3532
10u
C3533
47
R3637
0.1u
C3559
0.1u
C3558
0
R3636
4.7k
R3583
10k
R3584
10k
R3585
0
R3579
0.1u
C3523
0.1u
C3520
47
R3590
47
R3589
R3619
0
R3622
0
10k
R3556
10k
R3560
0.1u
C3513
1k
R3380
0
R3373
1.8k
R3387
1.8k
R3386
3.3k
R3573
2.2k
R3576
2.2k
R3578
10
R3588
4.7k
R3582
4.7u
C3517
R3640
0
10k
R3549
1k
R3593
R3645
0
R3646
0
33k
R3833
10k
R3552
1k
R3555
10k
R3836
100
R3837
10k
R3365
22k
R3835
10k
R3834
100
R3831
10k
R3551
10k
R3832
10k
R3591
300
R3370
47k
R3376
47k
R3377
62
R3374
1u
C3358
62
R3372
0
R3840
0
R3843
0
R3844
47k
R3521
10k
R3846
10k
R3845
R3644
0
R3643
0
100
R3625
22
R3513
22
R3514
IN3_D2+
IN3_D2-
IN3_D1+
IN3_D1-
IN3_D0+
IN3_D0-
IN3_CK+
IN3_CK-
IN3_SDA
IN3_HPD
IN3_5VP
IN3_SCL
CN3503
19P
1
DATA2+
2
DATA2 SHIELD
3
DATA2-
4
DATA1+
5
DATA1 SHIELD
6
DATA1-
7
DATA0+
8
DATA0 SHIELD
9
DATA0-
10
CLOCK+
11
CLOCK SHIELD
12
CLOCK-
13
CEC
14
RESERVE(NC)
15
SCL(5V)
16
SDA(5V)
17
DDC/CEC GND
18
+5V POWER
19
HOT PLUG DET
0
R3504
0
R3505
47k
R3520
22
R3515
22
R3510
IN3_D2+
IN2_D2-
IN2_D1+
IN2_D1-
IN2_D0+
IN2_D0-
IN2_CK+
IN2_CK-
IN2_SDA
IN2_HPD
IN2_5VP
IN2_SCL
CN3502
19P
1
DATA2+
2
DATA2 SHIELD
3
DATA2-
4
DATA1+
5
DATA1 SHIELD
6
DATA1-
7
DATA0+
8
DATA0 SHIELD
9
DATA0-
10
CLOCK+
11
CLOCK SHIELD
12
CLOCK-
13
CEC
14
RESERVE(NC)
15
SCL(5V)
16
SDA(5V)
17
DDC/CEC GND
18
+5V POWER
19
HOT PLUG DET
0
R3506
0
R3507
47k
R3523
22
R3516
22
R3517
IN1_D2+
IN1_D2-
IN1_D1+
IN1_D1-
IN1_D0+
IN1_D0-
IN1_CK+
IN1_CK-
IN1_SDA
IN1_HPD
IN1_SCL
CN3501
19P
1
DATA2+
2
MHL_CD0
3
DATA2-
4
DATA1+
5
DATA1 SHIELD
6
DATA1-
7
DATA0+
8
DATA0 SHIELD
9
DATA0-
10
CLOCK+
11
CLOCK SHIELD
12
CLOCK-
13
CEC
14
RESERVE(NC)
15
SCL(5V)
16
SDA(5V)
17
DDC/CEC GND
18
+5V POWER
19
HOT PLUG DET
0
R3508
0
R3509
22
R3518
22
R3519
X3001
27MHz
CEC
HDMI_RST
HDMI_SDA
HDMI_RST
HDMI_SDA
HDMI_SCL
HDMI_INT
MHL_OVC
MHL_PCONT
5VPWR_A
ARC_SPDIF
HDMI_MCK
HDMI_SCK
HDMI_WS
HDMI_SD3
HDMI_SD2
HDMI_SD1
HDMI_SD0
HDMI_SPDIF
HDMI_MUTE
CL3535
CL3534
CL3532
CL3533
CL3550
CL3550
CL3551
CL3531
CL3529
CL3530
CL3530
CL3528
CL3526
CL3527
CL3527
CL3525
CL3523
CL3524
CL3524
CL3522
CL3521
CL3520
CL3519
CN3514
23P
1 CEC
2 HDMI_RST
3 HDMI_SDA
4 DGND
5 HDMI_SCL
6 DGND
7 HDMI_INT
8 HDMI_MUTE
9 HDMI_SPDIF
2 HDMI_RST
3 HDMI_SDA
4 DGND
5 HDMI_SCL
6 DGND
7 HDMI_INT
8 HDMI_MUTE
9 HDMI_SPDIF
10 HDMI_SD0
11 HDMI_SD1
12 HDMI_SD2
13 HDMI_SD3
14 HDMI_LRCK
15 DGND
16 HDMI_BCK
17 DGND
18 HDMI_MCK
19 DGND
20 ARC_SPDIF
21 HDMIOUT_5VPWR
22 MHL_PCONT
23 MHL_OVC
11 HDMI_SD1
12 HDMI_SD2
13 HDMI_SD3
14 HDMI_LRCK
15 DGND
16 HDMI_BCK
17 DGND
18 HDMI_MCK
19 DGND
20 ARC_SPDIF
21 HDMIOUT_5VPWR
22 MHL_PCONT
23 MHL_OVC
0
R3849
0
R3848
0
R3850
0
R3826
0
R3827
EN
GND
NC
VIN
FIN
NC
NC
FB
VOUT
JL3544
JL3542
JL3540
JL3541
47
R3570
47
R3569
47
R3568
47
R3567
+5V REG.
IC3511
C3570
0.01u
R3816
10k
R3817
100
C3556
10u
C3561
10u
2.2k
R3647
3.3k
R3648
IC3517
RP108J081D-FE
1
CE
2
VDD
3
GND
4
VOUT
5
VFB
6 6
+1.2V REG.
IC3517
+5V REG.
IC3513
HDMI RECEIVER
IC3514
+5V REG.
IC3518
EEPROM
IC3512
+5V REG.
IC3519
>014S
MAIN
BOARD
(4/7)
CN2000
(Page 27)
>023S
STANDBY
DCDC
BOARD
CN1901
CN1901
(Page 36)
SAT/CATV
HDMI IN
BD/DVD
(for AUDIO)
GAME
TV OUT
ARC
HDMI OUT
VIDEO
(MHL)
DC5V 1A MAX
1
Note: IC3514 on the HDMI board cannot exchange with single.
When this part on the HDMI board is damaged, exchange
the entire mounted board.
the entire mounted board.
STR-DH550/DH750
STR-DH550/DH750
34
34
5-19. PRINTED WIRING BOARD – STANDBY DCDC Board (Component Side) –
• 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
C1902
C1903
C1904
C1905
C1907
C1909
C1910
C1912
C1913
C1914
C1922
C1923
C1924
C1925
C1927
C1929
R1901
R1903
R1906
R1907
C1930
R1908
R1909
C1932
C1933
C1934
IC1905
IC1906
IC1907
R1911
R1913
R1916
R1917
R1918
R1919
R1931
C1942
C1943
C1944
C1945
C1947
C1949
R1921
R1923
R1926
R1927
R1928
R1929
C1952
C1953
C1954
F901
F902
F940
F941
L910
Q951
E
LP1901
FH901
FH902
FH903
FH904
L1901
L1902
L1903
L1904
L1905
L1906
1
4
CN941
S901
R971
R972
R973
R974
R978
R979
R981
C960
C961
C969
C970
C971
D906
KA
C975
C978
C977
C976
C979
C980
C981
C982
C982
IC902
D923
RY951
13
CNP901
1
4
CNP902
1
5
CNP903
C1950
CN1901
1
9
10
12
ET1900
T902
R1905
R1915
D901
D902
D904
K
A
A
K
A
K
K
A
D903
LP1902
C1976
R1925
IC901
C963
R1930
R1932
STANDBY DCDC BOARD
(COMPONENT SIDE)
(COMPONENT SIDE)
1-889-544-
21
(21)
VOLTAGE SELECTOR
220V
127V
OFF
HDMI BOARD
CN3513
(Page 31)
>009P
MAIN BOARD
CN2005
(Page 22)
>007P
MAIN BOARD
CN950
(Page 22)
>002P
MAIN BOARD
CN951
(Page 22)
>001P
(CHASSIS)
T901
POWER
TRANSFORMER
(MAIN)
~ AC IN
POWER TRANSFORMER
(SUB)
Ú
DH550
¾
DH750
BR
¾
¾
Ú
Note: IC902 (DH750) on the STANDBY DCDC board cannot ex-
change with single. When this part on the STANDBY DCDC
board is damaged, exchange the entire mounted board.
board is damaged, exchange the entire mounted board.
Ver. 1.2
STR-DH550/DH750
STR-DH550/DH750
35
35
5-20. PRINTED WIRING BOARD – STANDBY DCDC Board (Conductor Side) –
• 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
CL901
CL902
CL903
CL904
CL905
CL906
CL907
CL908
CL912
CL913
CL914
CL915
CL942
CL984
CL985
CL986
CL996
Q952
E
C902
R960
R961
R963
C962
D905
E
C908
C907
JS904
JS906
JS901
STANDBY DCDC BOARD
(CONDUCTOR SIDE)
1-889-544-
21
(21)
BR
Ver. 1.2
STR-DH550/DH750
STR-DH550/DH750
36
36
5-21. SCHEMATIC DIAGRAM – STANDBY 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
STANDBY DCDC BOARD
(CHASSIS)
8
3.3
8.4
0.8
8.7
1
0.8
0.8
7
3.6
1
6.7
13.1
2
0.8
7
3.6
1
7.8
13.1
3.4
0.8
7
3.6
1
10.5
13.1
6.1
8.4
8.4
0
0.8
3.3
0.8
0
0.7
C1907
0.0022u
C1914
0.1u
0.1u
0.1u
C1904
0.1u
C1905
0.1u
C1902
10u
0.1u
C902
C1909
0.1u
C908
0.047u
C1903
10u
C970
0.1u
C962
0.1u
C961
0.1u
C960
0.1u
C971
0.1u
C975
10u
C976
10u
C1912
22u
C1913
22u
C1910
0.001u
C977
0.1u
C907
0.047u
C978
0.0033u
0.1u
C980
0.0033u
C979
C982
22u
C981
22u
C1976
3300u 25V
C963
3300u
16V
C969
1u 50V
CL906
CL905
CL913
CL914
CL908
CL912
CL904
CL903
CL903
CL901
CL902
CL996
CL985
CL907
CL984
CL986
CL942
CL915
CNP901
3P
1 LIVE
3 NEUTRAL
CNP902
4P
1 LIVE
4 NEUTRAL
CNP903
3P
1 220V(E51)/NC(BR)
3 120V(E51)/127V(BR)
5 240V(E51)/220V(BR)
CN941
4P
1
R3 AC (YEL)
2
NC
3
CENTER TAB
4
R3 AC (GRN)
CN1901
12P
1 PWR RLY
2 STOP
3 STBY +3.3V
4 STBY GND
5 R3 12V
6 +2V
7 +3.3V
8 +6V
9 +6V
10 +2V
11 +3.3V
12 +6V
D905
BAV70
D923
D3SBA60-7101
D906
DA2J10100L
ET1900
F940
F902
F941
3.15A 250V
3.15A 250V
FH904
FH901
FH902
FH903
T6.3AL 250V
JS906
0
JS904
0
JS901
0
L910
10uH
L1902
10uH
L1901
10uH
Q951
RELAY
DRIVER
2PD601ART
Q952
AC OFF DETECT
2PD601ART
R972
12
R971
15
R978
15k
2.2k
R974
10k
R1903
56k
R1930
56k
R1931
56k
R1932
47k
R973
4.7
R1905
22
R1901
33k
R1907
100k
R1909
33k
R1908
4.7k
R960
10k
R961
10k
R963
10k
R1906
75k
R979
24k
R981
RY951
S901
VOLTAGE
SELECTOR
1
2
3
4
5
6
7
8
9
10
11
12
IC902
RT7237ALGSP
1
BOOT
2
VIN
3
SW
4
GND
FB
5
COMP
6
EN
7
SS
8
9
IC1905
RT8293ALZSP
1
BOOT
2
VIN
3
SW
4
GND
FB
5
COMP
6
EN
7
SS
8
9
1
VO
2
FB
3
GND
4
NC_4
EN
5
NC_6
6
NC_7
7
VCC
8
9
T902
POWER TRANSFORMER
(SUB)
W1900
120/127v
220/240V
+6V REG.
IC1905
C1927
0.0022u
C1934
C1924
0.1u
C1925
0.1u
C1922
10u
C1929
0.1u
C1923
10u
C1932
22u
C1933
22u
C1930
0.001u
L1904
10uH
L1903
10uH
4.7k
R1913
4.7
R1915
22
R1911
22k
R1917
100k
R1919
10k
R1918
10k
R1916
IC1906
RT8293ALZSP
1
BOOT
2
VIN
3
SW
4
GND
FB
5
COMP
6
EN
7
SS
8
9
+3.3V REG.
IC1906
C1947
0.01u
C1954
C1944
0.1u
C1945
0.1u
C1942
10u
C1949
0.1u
C1943
10u
C1952
22u
C1953
22u
C1950
0.001u
L1906
10uH
L1905
10uH
4.7k
R1923
4.7
R1925
22
R1921
0
R1927
100k
R1929
18k
R1928
12k
R1926
IC1907
RT8293ALZSP
1
BOOT
2
VIN
3
SW
4
GND
FB
5
COMP
6
EN
7
SS
8
9
+2V REG.
IC1907
+3.3V REG.
(STBY)
IC902
IC901
BD00GC0WEFJ-SE2
+3.3V REG.
(STBY)
IC901
D903
D901
D901 ~ D904
GS1G
D902
D904
F901
*1
220V
r
OFF
r
127V
>023S
HDMI BOARD
CN3513
(Page 33)
>007S
MAIN BOARD
(2/7)
CN950
(Page 25)
>008S
MAIN BOARD
(2/7)
CN951
(Page 25)
>019S
MAIN BOARD (4/7)
CN2005
(Page 27)
POWER
TRANSFORMER
(MAIN)
T901
~ AC IN
DH550
DH750
BR
BR
*1
T3.15L 250V
(AEP, AUS, UK)
8A 125V
(US, CND)
T4AL 250V
(BR)
T6.3AL 250V
(MX, TW)
Note: IC902 (DH750) on the STANDBY DCDC board cannot ex-
change with single. When this part on the STANDBY DCDC
board is damaged, exchange the entire mounted board.
board is damaged, exchange the entire mounted board.
Ver. 1.2
Click on the first or last page to see other STR-DH550 / STR-DH750 service manuals if exist.