Read Sony STR-DB925 Service Manual online
– 9 –
– 10 –
STR-DB925
– INPUT SECTION –
L
DA
TA
IN
FM
AM
FM
75
Ω
AM
DO
MUTING
TUNED
STEREO
D
ATA
CLK
CE
L OUT
R OUT
TM301
TUNER UNIT
TUNER UNIT IS SUPPLIED AS THE ASSEMBLED BLOCK
DO
MUTING
TUNED
STEREO
S DA
TA
S CLK
S LA
T
R CH
R CH
RDS
PHONO IN
L
CD IN
J301
J303
L
IN
L
REC OUT
J302
L
FRONT
L
REAR
J430
WOOFER
5.1/DVD INPUT
MD/DAT
M OUT
J201
IN
MONITOR
J202
J203
DVD IN
TV/LD IN
VIDEO 2
OUT
IN
VIDEO 1
OUT
OUT
OUT
V1 IN
V1 OUT
V2 IN
V2 OUT
TV
LD
VEE
VCC
SW1
SW2
SW5
SW3
SW4
VIDEO SELECT
IC201
-5V
REG
IC202
-15V
+5V
13
15
14
AUDIO SELECT
IC301
L-CH
L
LS
CENTER
WOOFER
SLA
T
SCLK
S
D
ATA
3
1
EQ AMP
IC303
RV401
MASTER
VOLUME
VOLUME
RV402
BALANCE
L
F MUTE
SL
C
W
M
UP
DOWN
VIDEO -A
SYSTEM
CONTROL
IC1201
VIDEO-B
VIDEO-E
VIDEO-INH
09
TUNER MUTE
STEREO
AUSTOP
S DA
TA
S CLK
S LA
T
DO
MUTING
STEREO
TUNED
S DA
TA
S CLOCK
LA
T
DIRECT
-P
ASS
VOL
MOTOR
IC103
DOWN
UP
L
IN
L
REC OUT
TAPE
CENTER
J299
VIDEO
L
AUDIO
VIDEO 3
INPUT
V3 IN
CONTROL
AUDIO SELECT
IC303
SLA
T
SCLK
S
D
ATA
L
TV/LD
DVD
L
J305
VIDEO2
AUDIO IN
AUDIO IN
L
AUDIO OUT
L
VIDEO1
AUDIO IN
L
AUDIO IN
L
LED
DRIVE
Q120
Y
V1 O
VIDEO 1
TV
LD
SW1
SW2
SW3
SW4
SW3
SW4
SW5
V3 O
M O
Y SWITCH
IC252
C
Y
J252
VIDEO 1
Y
C
C
Y
C SWITCH
IC251
C
Y
C
J251
MONITOR
J298
VIDEO 3
INPUT
S-VIDEO
TV/LD
J253
J252
J304
V1 O
TV
V1 I
SW1
SW2
SW2
SW3
SW4
SW4
V3 O
M O
V1 I
C
Y
DVD
LD
VA
VB
VC
V INH
RDS CLK
RDS DATA
ANT LEV
VOL DOWN
LED VOL
VOL UP
FNIF
RDS DECODER
RDS DATA
RDS CLK
X1
4.43MHz
IC1
S-VIDEO
OUT
AUDIO OUT
VIDEO
CONTROL
SELECTOR
IC303
SLA
T
SCLK
S
D
ATA
1
LPF
IC405
LPF
IC406
-AMP-
IC408
IC409
IC410(1/2)
IC410(2/2)
LPF
IC407(1/2)
LPF
IC407(2/2)
3
RY301
1
3
7
5
1
3
CONTROL
C
DOLBY
SECTION
(Page 14)
(Page 8)
(Page 11)
(Page 11)
A
POWER
SECTION
G
DSP
SECTION
B
POWER
SECTION
RELAY
DRIVE
Q301
MUTE
Q302
MUTE
Q303
MUTE
Q304
MUTE
Q354
S-VIDEO
IN
SW5
7
5
LINE AMP
IC304
7
5
7
5
1
3
7
5
• R CH is omitted
• Signal path
: FM
: PHONO
: CD
: VIDEO
• Signal path
: FM
: PHONO
: CD
: VIDEO
3
2
1
7
5
6
10
9
4
8
11
1
2
6
7
10
9
11
8
4
13
15
14
4
2
14
13
16
1
13
15
9
11
3
5
7
8
16
14
10
2
4
6
3
2
108
57 58
56
60 97 62 61
81
82
83
80
3
5
13
4
6
2
2
14
10
15
1
7
3
13
5
15
1
7
14
10
4
6
6
2
3
2
8
7
27
26
24
23
4
5
1
25
6
22
3
2
13
15
14
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