Block Diagram - Sony STR-DE225 Service Manual

Q Q
3 7 6 3 1 5 1 5 0

3-2. BLOCK DIAGRAM

TUNER BLOCK
FM ANT
FM L OUT
(75Ω)
AM ANT AM R OUT
EQ AMP
AEP, UK, G, EE MODEL
IC402
L
PHONO
EXCEPT AEP, UK, G,
R R CH
EE MODEL
J401
L
CD CD
R
R CH
L
TAPE TAPE
J402
IN IN
R R CH
L
TAPE TAPE
J402
OUT OUT
R
R CH
L
TV/LD TV/LD
R
R CH
L
VIDEO VIDEO
J403
IN IN
R R CH
J403
L
VIDEO VIDEO
T E
L 1 3 9 4 2 2 9 6 5 1 3
OUT OUT
R
R CH
AEP, UK, G, EE MODEL
4
• RCH is omitted
• Signal Path
: FM
: PHONO
SIG
25
SIGNAL
AUTO STOP
: CD (ANALOG) 18 AUTO STOP
STEREO
19 STEREO
T MUTE
40 T MUTE
DO
11 PLL DATA
16
w w w
.
AUDIO SELECTOR SURROUND
IC401 PROCESSOR
IC300
28 27 45 LT IN L OUT 24
30
R CH
29 31 C OUT 9
24 23
32 S OUT
25 22
X301
26
8MHz
22 20
21
35 37 34 38 30
14 15 13
X1
4.33MHz
13 14
2
RDS
IC1 16
LED SW
LED +5V
Q231
D239
BASS
BOOST
45 46 10 9 12 13 54
SYSTEM CONTROL
IC201
34 35 39 38 37 43 28 27 26
X201
4.198MHz
FUNCTION
D235 D236 D237 D238
x a o KEY
y
S217-239
S241,242
S240
LED +5V
i
C
HALL PROLOGIC MUTING
STUDIO
— 7 —
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8
BASS TREBLE
RV422 RV421
POWER AMP
IC701
MUTE
13 VCC
+B
Q303
14 VCC +VE 1 2
BALANCE
-B 15 VEE
RV423 AMP
VOLUME
IC404
RV404
SURROUND
AMP
6 IN 1
IC302
(1/2)
8 IN 2
MUTE
IC302
Q307
(1/2) -VE 1 3
MUTE
Q308
+VE 2 12
Q401,452
DBFB
CONTROL
UP
M
-VE 2 11
DOWN
POWER AMP
IC702
+B 13 VCC
14 VCC +VE 2
-B 15 VEE
8 IN
-VE 3
Q Q
3 7 6 3
8 7
MOTOR
DRIVER
IC202
3 2
53 41 42 16 21 22
BRIDGE
POWER RY
STOP
RESET
SIRCS
S1 15 G1 10
77 72 . 70 62 1 . 80 78
44 60 59 56 7
D221-223
FUNCTION
S8-15
u 1 6 3 KEY
S201-216
S200
SYSTEM .
FL201
POWER
FLOURESCENT
INDICATOR TUBE
F1
F2
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2 4
9 9 8
POWER
AMP
Q703
BIAS
Q701,Q702
RY701
RELAY
DRIVE
POWER CURRENT
Q710
AMP DET
Q704 Q720
POWER
AMP
Q653
BIAS
Q651,Q652
POWER CURRENT
AMP DET
Q654 Q670
POWER
AMP
RELAY
Q603
DRIVE
Q610
BIAS
Q601,Q602
POWER CURRENT
AMP DET
Q604 Q620
PROTECTOR
1 5 1 5 0 8 9 2 4
Q721-723
D203 D723
D724 D725
D802 RY851
+B
-B
-24V REG
-24V RY852
Q801
IC801
D820-823
+12V
+12V 3 1
REG
+9V REG
+9V
Q808
IC802
-12V
-12V 3 2
REG
RY801 RY801
RELAY
15 DRIVE
Q809
RELAY
23 DRIVE
Q802
47
RESET
EXCEPT
17
Q201,202
CND MODEL
IC203
US, CND, E,
EA MODEL
REMOTE
CONTROL
49 1 2
EXCEPT E, EA,
RECEIVER
CH MODEL
D810-813
m
STANDBY
8 5
D202 IC950
LED +5V
3 6
c o
D201 L401
IC201 +B
D901
DELAY
TUNER/RDS +5V +B SW
Q951
+5.6V
— 8 —
STR-DE225/DE325
2
9 9
R CH J741
S701 PHONS
SPEAKER B
ON
A B
OFF
TM701
SPEAKER A FRONT
L
SPEAKER
ON
OFF
R CH
R
R CH R CH
C
S(L) TM601
SURROUND
S(R) SPEAKER
RY601
J253
WOOFER
9 8 2 9 9
CND MODEL
T901
E, EA MODEL
F901
F1
F2 S901
RY901
AEP, G, EE, SP,
MY, AUS,CH MODEL
F902
CNJ902
T902 CNJ902
AC
IN