DOWNLOAD Sony STR-DH550 / STR-DH750 Service Manual ↓ Size: 5.92 MB | Pages: 80 in PDF or view online for FREE

Model
STR-DH550 STR-DH750
Pages
80
Size
5.92 MB
Type
PDF
Document
Service Manual
Brand
Device
Audio
File
str-dh550-str-dh750.pdf
Date

Sony STR-DH550 / STR-DH750 Service Manual ▷ View online

STR-DH550/DH750
STR-DH550/DH750
41
41
5-28.  PRINTED WIRING BOARD – POWER KEY Board –
 
• See page 14 for Circuit Boards Location.    • 
: Uses unleaded solder.
5-29.  SCHEMATIC  DIAGRAM  – POWER KEY Board –
1
A
B
C
D
2
3
4
5
6
7
POWER KEY BOARD
1
8
3
4
5
6
7
LED_ON
CN108
8P
AD1
LED_STBY
POWER_BUTTON
DGND
NC
+3.3V_STBY
LED_ON
2.2k
R181
10k
R180
22k
R183
4.7k
R182
CL166
CL165
CL164
CL162
CL161
CL160
CL163
Q111
2PD601ART
100
R175
47
R176
100k
R178
10k
R173
100k
R179
Q110
LED DRIVER
LED DRIVER
2PD601ART
D110
SML78423C-TP15
2.2k
R174
S114
SPEAKERS
LED (ON/STBY)
S112
TUNING –
S111
TUNING +
S115
"/1
S113
TUNING
MODE
GRN
ORG
1
2
3
>024S
DISPLAY
BOARD
CN100
(Page 38) 
1
A
B
C
D
E
F
G
H
I
J
K
2
3
4
5
6
7
8
1
8
3
CN108
LP110
D110
S111
LP111
S112
S113
S114
S115
R175
Q110
E
E
Q111
R173
R174
R179
R176
R178
CL160
CL161
CL162
CL163
CL164
CL165
CL166
R182
R180
R181
R183
 POWER KEY
 BOARD
1-889-542-
12
(12)
&/1
SPEAKERS
LED ON/STBY)
TUNING MODE
DISPLAY
BOARD
CN100
(Page 37) 
>010P
TUNING +
TUNING –
STR-DH550/DH750
STR-DH550/DH750
42
42
5-30.  PRINTED WIRING BOARD – HEADPHONE Board –
 
• See page 14 for Circuit Boards Location.    • 
: Uses unleaded solder.
5-31.  SCHEMATIC  DIAGRAM  – HEADPHONE Board –
1
A
B
2
3
4
5
HEADPHONE BOARD
CL185
CL186
CL187
CL188
CN107
5P
C160
0.001u
C162
0.001u
C161
0.001u
J101
PHONES
1
HP_DETECT
3
HP_R
4
HP_GND
5
HP_L
1
2
3
4
5
6
7
>006S
MAIN BOARD
(2/7)
CN391
(Page 25) 
1
A
B
C
D
E
F
G
H
I
J
K
2
3
4
5
6
7
LP106
J101
1
5
3
CN107
C160
C162
C161
CL185
CL186
CL187
CL188
MAIN
BOARD
CN391
(Page 22) 
>003P
 HEADPHONE BOARD
PHONES
1-889-541-
12
(12)
STR-DH550/DH750
43
•  IC Block Diagrams
IC3518  TPS2553DBVR (HDMI BOARD)
IC2902  TPS2553DBVR (MAIN BOARD (7/7))
GND 2
EN 3
IN 1
4 FAULT
5 ILLM
6 OUT
CHARGE
PUMP
UNDERVOLTAGE
LOCKOUT
THERMAL
SENSE
CURRENT
LIMIT
4-ms
DEGLITCH
8-ms
DEGLITCH
CURRENT
SENSE
DRIVER
+
REVERSE VOLTAGE
COMPARATOR
IC200  NJM41010F1 (MAIN BOARD (3/7))
+
3
VCC
CLAMP
CLAMP
GND
OUT
6dB
75
: Driver
2
1
4
5
6
VIN1
VIN2
VSW
STR-DH550/DH750
44
IC400  BD34701KS2 (MAIN BOARD (3/7))
IC2008  BR24T64FJ-WE2 (MAIN BOARD (4/7))
1
A0
A1
A2
GND
Vcc
64Kbit    EEPROM    ARRAY
WORD
ADDRESS REGISTER
CONTROL LOGIC
HIGH VOLTAGE GEN
Vcc LEVEL DETECT
STOP
ACK
START
DATA
REGISTER
8bit
13bit
ADDRESS
DECODER
WP
SCL
SDA
2
3
4
8
7
6
5
40
41
42
43
44
45
46
47
49
50
52
CHIP
ADCL
ADCR
FRIN
FLIN
SWIN
CIN
SRIN
SLIN
SBRIN
SBLIN
INR1
38
INL1
37
INR2
36
INL2
35
INR3
34
INL3
33
INR4
32
INL4
31
INR5
30
INL5
29
INR6
28
INL6
27
INR7
25
INR8
23
INL8
22
GND
GND
SUBR
15
SUBL
14
GND
39
GSM
GSM
GSM
GSM
GSM
GSM
GSM
GSM
48
GND
51
GND
DGND
2
DA
3
CL
4
VEE
5
OUTFR
6
OUTFL
7
OUTSW
8
OUTC
9
OUTSR
10
OUTSL
11
OUTSBR
12
OUTSBL
13
VCC
1
Logic
FR
Volume
FL
Volume
SW
Volume
C
Volume
SR
Volume
SL
Volume
SBR
Volume
SBL
Volume
Mode
selector
Mode
selector
Mode
selector
Mode
selector
ADC
GND
20
GND
21
GSM
GSM
GND
26
GSM
GSM
GSM
GSM
GSM GSM
GSM GSM
GSM
GSM
GSM
GSM
Main
Sub
Rec
RECL
18
RECR
19
GSM
GSM
INL7
24
17
16
Page of 80
Display

Click on the first or last page to see other STR-DH550 / STR-DH750 service manuals if exist.