Sony STR-DG300 Service Manual ▷ View online
STR-DG300
13
13
STR-DG300
4-3. BLOCK DIAGRAM — KEY/DISPLAY SECTION —
(Page 11)
83
FL DISPLAY DRIVER
IC100
14
I
29
82
29
30
5
6
65
64
54
SW NETWORK
S101–107,124
RV102
MASTER
VOLUME
VOLUME
56
51
49
28
27
77
+3.3V
(STBY)
X1
X0
SDA
SCL
POWER KEY
FLASH1/XM_TX
FLASH2/XM_RX
MD2
MD0
RSTX
SDA
SCL
EEPROM
IC1131
X1101
24MHz
SIRCS
9
4
2
9
FL LAT
9 STB
7 DIN
8 CLK
3
6
8
GRID12
I
GRID1
SEG1
I
SEG16
VOL ENC A
VOL ENC B
VOL ENC B
A/D2
SW NETWORK
S108–112,115
A/D1
1
3
31
32
21
22
RV101
INPUT
SELECTOR
TUNING A
TUNING B
TUNING B
1
3
RV103
TUNING
+/-
ENC A
ENC B
ENC B
1
3
BUFFER
IC101
1
REMOTE
CONTROL
RECEIVER
IC102
OUT
SIRCS
SYSTEM
CONTROL
IC1101 (3/4)
CNS504
S100
FLASH1
FLASH2
MD2
MD0
RESET
RESET
SCL
SDA
1
2
7
6
6
5
8
9
8
9
FLASH
PROGRAMMING
1
2
I
/ I
FL DATA
FL CLK
TUNER/
AUDIO
SECTION
C
39
40
FL101
VACUUM
FLUORESCENT
DISPLAY
IC1111
RESET
31
I
42
STR-DG300
14
14
STR-DG300
4-4. BLOCK DIAGRAM — POWER SECTION —
8
12
11
DRIVE
POWER AMP
Q701-704
CURRENT
DETECT
Q705,706
RY791
RY600
RY701
PRE DRIVER
IC701
IN 2
+VOUT2
-VOUT2
SPEAKERS
IMPEDANCE
USE 8-16Ω
R
FRONT B
L
R-CH
R-CH
L-CH
R-CH
R-CH
TUNER/
AUDIO
SECTION
D
RY901
RY801
F2
+3.3V
(STBY)
+2.6V
+5V-1
-7V
+7V
TU+10V
-20V
RECT
D910-913
T902
POWER
TRANSFORMER
D914
AC IN
DETECT
Q921
D915
AC IN
~
61
-20V REG
Q801
RELAY
DRIVER
Q901
RELAY
DRIVER
Q790
69
66
62
PROTECTOR
D721,722,732
Q722,723,725,793,795
55
58
48
68
F1
-B
+3.3V/+2.6V
REG
4
5
+3.3V
2
IC1901
+5V-2
+5V
REG
1
3
IC1001
TU+3.3V
+3.3V
REG
1
3
IC1071
+3.3V
REG
1
3
IC1904
+9V
REG
1
3
IC1902
-15V
+15V
+7V
REG
3
1
IC801
-7V
REG
1
3
IC802
+5V
REG
1
3
IC1031
+B
R-CH
R-CH
RECT
D802
D802
RECT
D920-923
RECT
D805-808
T901
POWER
TRANSFORMER
TM600
R
FRONT A
L
R-CH
TM601
J791
PHONES
HP-RY
SB-RY
FRONT RY
HP DETECT
HP-RY
HP DETECT
SB-RY
FRONT-RY
HP_RY
FRONT RY
REAR_RY
PROTECTOR
HP DETECT
P0WER RY
67
SP_B_RY
72
BRIDGEABLE RY
STOP
C/SB RY
SYSTEM
CONTROL
IC1101 (4/4)
PRE
DRIVE
D1110
D1108
D1107
D1111
RELAY
DRIVER
Q710
RELAY
DRIVER
Q809
R810
R811
F902
F901
J911
AC OUTLET
R910
RELAY
SWITCH
RELAY
DRIVER
Q800
• Signal path
: TUNER (FM/AM)
• R-ch is omitted due to
same as L-ch.
same as L-ch.
(Page 11)
STR-DG300
15
15
STR-DG300
for schematic diagram:
• All capacitors are in µF unless otherwise noted. (p: pF)
• All capacitors are in µF unless otherwise noted. (p: pF)
50 WV or less are not indicated except for electrolytics
and tantalums.
and tantalums.
• All resistors are in
Ω
and
1
/
4
W or less unless otherwise
specified.
•
f
: internal component.
•
2
: nonflammable resistor.
•
5
: fusible resistor.
•
C
: panel designation.
•
A
: B+ Line.
•
B
: B– Line.
• Voltage and waveforms are dc with respect to ground
under no-signal (detuned) conditions.
no mark : FM
no mark : FM
• Voltages are taken with a VOM (Input impedance 10 M
Ω
).
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Waveforms are taken with a oscilloscope.
Voltage variations may be noted due to normal produc-
tion tolerances.
tion tolerances.
• Circled numbers refer to waveforms.
• Signal path.
F
: TUNER (FM/AM)
L
: VIDEO (AUDIO)
I
: VIDEO
J
: CD (ANALOG)
c
: CD (DIGITAL)
for printed wiring boards:
• X
: parts extracted from the component side.
•
f
: internal component.
•
: Pattern from the side which enables seeing.
Caution:
Pattern face side: Parts on the pattern face side seen from the
(Side B)
Pattern face side: Parts on the pattern face side seen from the
(Side B)
pattern face are indicated.
Parts face side:
Parts on the parts face side seen from the
(Side A)
parts face are indicated.
C
B
These are omitted.
E
Q
B
These are omitted.
C
Q
Q
E
B
C
E
4-5. CIRCUIT BOARDS LOCATION
THIS NOTE IS COMMON FOR PRINTED WIRING BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this, the necessary note is printed in each block.)
(In addition to this, the necessary note is printed in each block.)
MAIN board
DIGITAL board
DISPLAY board
POWER board
MINI AUDIO IN board
HEADPHONE board
SPEAKER B board
STANDBY board
Note: The components identified by mark
0
or dotted line
with mark
0
are critical for safety.
Replace only with part number specified.
STR-DG300
16
16
STR-DG300
4-6. PRINTED WIRING BOARDS — MAIN SECTION — • Refer to page 15 for Circuit Boards Location.
: Uses unleaded solder.
1
A
B
C
D
E
F
G
H
2
3
4
5
6
7
8
9
10
11
12
13
MINI AUDIO IN BOARD
CN2500
JW791
CNP791
TP701
C790
B
T79
0
C791
J791
IC401
Q703
Q704
JW707
Q753
JW735
JW703
CC08
CC58
CC07
CC57
CC05
CC55
CC09
CC59
CC02
CC52
CNP503
CC56
CC04
CC54
JW720
JW722
JW752
JW
716
JWH108
JW717
JW751
JW818
CC06
JW753
CC13
JW770
JWB01
JWB03
JW714
JW568
Q754
JW
602
JW584
JW569
JW
817
JW816
JW581
JW582
JW578
JW626
JW
H
112
JW507
JW708
CN807
JW767
JW453
JW320
JW420
JW620
JW836
JWB02
JW800
JW813
R532
IC801
Q752
R454
R455
R480
D722
RY560
R731
C468
L701
R766
R775
R407
R402
R405
R404
Q755
R794
R736
R408
R458
R456
C810
R406
C767
R733
R780
R457
R771
R772
R761
R763
D802
Q722
D732
D721
R764
R721
D791
Q560
R703
CNP501
R778
L751
C488
C805
R792
R704
Q702
R473
R714
Q701
R475
R429
Q756
Q793
R692
R773
Q723
R737
C720
Q795
Q710
R719
C761
R767
R716
R715
R710
D765
R711
R723
R760
R722
C464
R533
Q705
IC402
D705
C711
Q751
R713
Q725
CNP802
R806
Q790
R476
D560
C809
R474
R724
R804
C716
R452
D896
C757
C707
Q801
R752
R702
R701
R754
C756
C705
C704
C706
C754
IC701
Q706
R441
R421
C755
R409
C806
C499
C469
R735
R428
D804
C717
R734
R802
R718
R768
R791
R793
D801
D808
D805
D806
D807
C830
C831
JW
445
TP800
CNP912
R769
C770
R717
R744
R753
C710
C760
C801
C802
C822
C791
C721
C722
C751
C753
C703
C701
C744
C733
C732
C807
C808
C484
C481
C471
C495
C472
C459
C409
C702
C762
C458
C408
CN915
CN507
C832
JW
H116
D710
JW
757
JW702
JW436
JW637
JW636
JW322
JW701
R751
JW440
JW3002
JW439
JW410
JW409
JW317
C500
C512
C811
JW311
JW312
C513
C518
C520
C523
R910
CNP911
CNP913
RR12
JW763
R706
R732
JW451
JW738
JW510
JW802
JW
803
JW
806
JW
807
JW808
JW715
JW719
JW721
JW783
JW443
C521
C522
R499
JW463
JW466
JW469
JW313
JW314
JW315
JW316
JW809
JW
710
C482
C483
C804
C803
R803
JW712
JW601
JW444
JW718
JW711
JW
713
R765
C766
JW819
JW771
CNP801
RY791
RY701
R469
R468
R470
JW464
JW465
JW416
C444
JW419
JW430
C403
C453
C463
JW461
R459
JWH118
J402
JW810
JW811
JW812
JW723
JW414
WP101
WP102
RR11
TM601
CC11
R691
J403
J404
J309
JWH122
JWH117
TP801
R725
C400
JW458
JW455
JW454
JW425
JW438
JW411
JW415
WP100
JW470
JW435
JW428
CNP500
JW437
WP02
WP03
WP04
JW412
JW3004
JW3003
JW413
JW452
JW323
JW324
JW429
JW456
IC802
CN792
JW804
JW805
(Page 20)
(Page 27)
(Page 26)
(Page 29)
(Page 20)
(Page 20)
(Page 29)
(Page 20)
(Page 26)
(Page 26)
D560
C-7
D705
F-6
D710
D-8
D721
E-9
D722
E-9
D732
F-10
D765
F-9
D791
E-11
D801
E-11
D802
C-12
D804
E-11
• Semiconductor Location
Ref. No.
Location
Ref. No.
Location
Ref. No.
Location
Ref. No.
Location
D805
D-12
D806
D-12
D807
D-12
D808
D-12
D896
D-6
IC401
D-3
IC402
E-3
IC701
E-5
IC801
D-6
IC802
D-6
Q560
D-7
Q701
F-5
Q702
G-6
Q703
G-5
Q704
G-6
Q705
F-6
Q706
F-6
Q710
D-8
Q722
E-10
Q723
E-10
Q725
E-10
Q751
F-9
Q752
G-9
Q753
G-8
Q754
G-9
Q755
F-9
Q756
F-10
Q790
E-11
Q793
F-10
Q795
E-10
Q801
E-11
(Page 20)
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