Sony STR-DE425 Service Manual ▷ View online
— 5 —
SECTION 3
DIAGRAMS
3-1.
CIRCUIT BOARDS LOCATION
PRIMARY
board
board
DISPLAY
board
board
SP-SW board
10 KEY board
VR-TONE board
VOLUME board
MAIN board
VIDEO board
STAND BY board
SP-SCREW board
SECONDARY
board
board
— 6 —
For schematic diagrams.
Note:
Note:
• All capacitors are in
µ
F unless otherwise noted. pF:
µµ
F
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.
•
%
: indicates tolerance.
•
¢
: internal component.
•
2
: nonflammable resistor.
•
1
: fusible resistor.
•
C
: panel designation.
•
U
: B+ Line.
•
V
: B– Line.
•
H
: adjustment for repair.
• Voltages 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 production
tolerances.
tolerances.
• Waveforms are taken with a oscilloscope.
• Circled numbers refer to waveforms.
• Signal path.
• Circled numbers refer to waveforms.
• Signal path.
F
: FM
• Abbreviation
CND : Canadian
EE
EE
: East European
AUS
: Australian
CH
: Chinese
G
: German
MY
: Malaysia
SP
: Singapore
THIS NOTE IS COMMON FOR PRINTED WIRING
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
BOARDS AND SCHEMATIC DIAGRAMS.
(In addition to this necessary note is printed in each
block.)
For printed wiring boards.
Note:
Note:
• X
: parts extracted from the component side.
•
®
: Through hole.
•
¢
: internal component.
• b
: Pattern from the side which enables seeing.
Note:
The components identified by
mark
The components identified by
mark
!
or dotted line with mark
!
are critical for safety.
Replace only with part number
specified.
specified.
Note:
Les composants identifiés par
une marque
Les composants identifiés par
une marque
!
sont critiques
pour la sécurité.
Ne les remplacer que par une
pièce portant le numéro spécifié.
Ne les remplacer que par une
pièce portant le numéro spécifié.
• Waveform
1
IC201 34PIN (X1)
2
IC300 32PIN (OSC)
8MHz
4.19MHz
5.2Vp-p
0.58Vp-p
STR-DE425
— 7 —
— 8 —
D
ATA
L OUT
FM
AM
R OUT
CLK
CE
TUNED
STEREO
T MUITE
DO
R CH
FM ANT
(75
Ω
)
AM ANT
SD
ATA
SCLK
SLA
T
AU
T
O
ST
OP
STEREO
T MUTE
DO
J401
L
R
PHONO
R CH
J402
L
R
R CH
L
R
R CH
J403
L
R
R CH
L
R
R CH
VIDEO
IN
EQ AMP
IC402
+15V
REG
REG
IC801
28
TUNER BLOCK
SIGNAL
SIG
DET OUT
L
R
R CH
CD
L
R
R CH
TV/LD
VIDEO
OUT
TAPE
IN
TAPE
OUT
J403
VIDEO
IN
CD
TV/LD
VIDEO
OUT
TAPE
IN
TAPE
OUT
J402
30
29
24
25
26
22
21
CL
15
DI
14
CE
13
27
23
20
S D
ATA
S CLK
SLA
T
AUDIO SELECTOR
IC401
D
ATA
35 37
CLK
34 38
CE
30
24
L OUT
9
C OUT
22
S OUT
LT IN
45
31
32
X301
8MHz
D
ATA
CLK
S D
ATA
S CLK
SURROUND
PROCESSOR
IC300
J501
L
R
FRONT
R CH
L
R
R CH
REAR
501
INPUT
CENTER
WOOFER
5.1 I/P
MONITER
TV/LD
VIDEO 1
IN
OUT
J252
J251
BASS
RV421
TREBLE
RV422
DBFB
CONTROL
Q451,452
AMP
IC404
6
5
21
22
3
2
1
IC502(1/2)
IC302
(1/2)
IC302
(2/2)
IC501(1/2)
9
+15V
DI
14
CL
15
CE
13
8
20
4
11
SELECTOR
IC500
S D
A
T
S CLK
S LA
T
4
2
16
13
14
X1
4.33MHz
RDS
IC1
MUTE
Q361
BALANCE
RV423
MUTE
Q365
MUTE
Q363
MUTE
Q366
VOLUME
RV404
SURROUND
AMP
M
DOWN
UP
BIAS
Q701,Q702
14
15
6
2
3
VEE
VCC
IN
+VE
-VE
13 VCC
POWER AMP
IC701
+B
-B
POWER
AMP
Q703
CURRENT
DET
Q720
POWER
AMP
Q704
7
1
6
5
VEE
IN
+VE
-VE
9
VCC
POWER AMP
IC551
+B
-B
POWER
AMP
Q553
CURRENT
DET
Q570
POWER
AMP
Q554
SURROUND
AMP
IC601
WOOFER
AMP
IC502(2/2)
PROTECTOR
Q721-723
RELAY
DRIVE
Q710
RY701
J253
C
S(L)
S(R)
SURROUND
SPEAKER
WOOFER
J741
PHONS
TM601
FRONT
SPEAKER
TM701
R CH
L
R
RELAY
DRIVE
Q560
RY551
RELAY
DRIVE
Q610
RY601
RELAY
DRIVE
Q367
RY301
D321
+B
D311
D728
D727
D726
D725
D723
D203
D724
SPEAKER A
SPEAKER B
ON
OFF
ON
OFF
S701
R CH
R CH
R CH
R CH
B
A
8
7
3
2
MOTOR
DRIVER
DRIVER
IC202
UP
DO
WN
VIDEO SELECT
IC251
V3
12
V1
1
MON
10
V2
3
OUT
5
13
S1
2
S2
4
S2
11
MUTE
S1
58
S2
57
MUTE
36
SYSTEM CONTROL
IC201
46
RDS D
A
T
A
45
45
45
RDS CLK
11
PLL D
A
T
A
40
T MUTE
19
STEREO
18
AU
T
O
ST
OP
25
SIGNAL
12
S CE
9
S CLK
10
S D
ATA
13
S CE
53
LO
W BASS
DO
T MUTE
STEREO
AU
T
O
ST
OP
SIG
S LA
T
S CLK
S D
ATA
55
MUTE S
.L
54
MUTE FUNC
41
UP
42
DO
WN
16
PR
O
TECT
21
SP R
Y
22
SURR R
Y
14
REAR R
Y
VERSION
56
X1
34
X2
35
X201
4.198MHz
LED SW
Q230
5.1 CH
51
HALL
39
SIMULA
TED
38
PR
OLOGIC
37
MUTING
43
5.1/
VDD
MUTING
HALL
PROLOGIC
C
STUDIO
LED +5V
D235
D236
D234
D237
D238
FUNCTION
KEY
A/D 2
27
A/D 1
28
A/D 3
26
S217-239
S241-243
S241-243
S240
FUNCTION
KEY
S201-216
KI 1
60
KI 2
59
S200
SYSTEM
POWER
SYS PO
WER
44
77 72 . 70 62
7
1 . 80 78
S1 15
G1 10
S8-15
D221-225
FL201
FLOURESCENT
INDICATOR TUBE
F1
F2
F1
F2
1
3
-15V
REG
IC802
2
3
+9V REG
Q808
+15V
-24V REG
Q801
+9V
-15V
+B
-B
-24V
D802
T901
D803
F802
F801
F901
RELAY
DRIVE
Q809
RY801
RY852
RY851
RY801
RY901
RELAY
DRIVE
Q802
JW335
JW336
CNJ902
US,CND MODEL
CNJ902
EXCEPT
US,CND,UK MODEL
US,CND,UK MODEL
EXCEPT
US,CND MODEL
US,CND MODEL
CNP903
AC
IN
F902
T902
STANDBY
IC950
6
5
8
DELAY
+B SW
+B SW
Q951
D810-813
RESET
Q201,202
REMOTE
CONTROL
RECEIVER
2
1
3
D202
D201
D901
L401
LED +5V
IC201 +B
TUNER/RDS +5V
+5.6V
IC203
15
BRIDGE
23
POWER RY
47
STOP
17
RESET
49
SIRCS
11
16
: FM
: CD (ANALOG)
• Signal Path
• RCH is omitted
: VIDEO
: PHONO
46
LED SW
Q231
D239
BASS
BOOST
LED +5V
AEP, UK, G, EE MODEL
EXCEPT AEP, UK, G,
EE MODEL
EE MODEL
AEP, UK, G, EE MODEL
BIAS
Q551,Q552
3-2. BLOCK DIAGRAM
STR-DE425
— 9 —
— 10 —
3-3. SCHEMATIC DIAGRAM — DISPLAY SECTION —
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