Read Sony STR-DE825 / STR-V818 Service Manual online
STR-DE825/V818
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— 12 —
3-3. BLOCK DIAGRAM – POWER SECTION –
RELAY
DRIVE
Q601
LIMITER
Q504
14
5
15
6
1
2
3
VEE
VCC
IN
MUT
+VE
NF
-VE
13 VCC
POWER AMP(L)
IC501
L
+B
-B
LIMITER
Q505
BOOSTER
Q506
BOOSTER
Q507
CUR DET
Q508
PROTECTOR
Q509,510
Q511
LIMITER
Q604
9
15
12
11
VEE
IN
+VE
NF
-VE
13 VCC
POWER AMP(C/W)
IC601
C
+B
-B
LIMITER
Q605
BOOSTER
Q606
BOOSTER
Q607
CUR DET
Q608
PROTECTOR
Q609,610
Q611
LIMITER
Q704
MUTE
Q501,503
14
5
15
6
1
2
3
VEE
VCC
IN
MUT
+VE
NF
-VE
13 VCC
POWER AMP(SL)
IC701
SL
+B
-B
LIMITER
Q705
BOOSTER
Q706
BOOSTER
Q707
CUR DET
Q708
8
RY602
RELAY
DRIVE
Q546
RY501
RELAY
DRIVE
Q596
RY502
RELAY
DRIVE
Q645
RY601
RELAY
DRIVE
Q749
RY701
RELAY
DRIVE
Q544
RY503
RELAY
DRIVE
Q901
RY901
J501
C
S(L)
S(R)
R CH
R CH
WIRELESS
REAR
SPEAKER
CNJ701
SURROUND
SPEAKER
WOOFER
J701
PHONES
TM701
FRONT
SPEAKER
TM501
R CH
R CH
POWER
CONT
IC901
5
8
3
6
DELAY
+B SW
Q902
SWITCH
Q747,748
D801
SWITCH
Q614,618
INV SW
Q617
SWITCH
Q613,616
SWITCH
Q612,615
PROTECTOR
Q547-549
F2
F1
+5.6V
F801
F802
D802-805
+B
-B
IMPEDANCE
SELECTOR
8
4
S501
F901
D901-904
CNJ901
CNP901
AC IN
L
R
:FM
:CD
D
• Signal Path
• RCH is omitted
IN
W
6
14 VCC
2
+VE
3
-VE
1
+18V
REG
IC702
3
F803
F804
1
+3.3V
REG
3
3
+5V
REG
1
IC809
+24V
-24V
1
5V
REG
3
IC809
IC801
IC802
CNJ901
T902
MODE CONTROL
IC102
STOP
A
AC MUTE
PROTECTOR
REMOTO
CONTROL
RECEIVER
IC101
26
SIRCS
Q101
RESET
Q105
77
RESET
POWER
S131
PO
WER KEY
74
F2
F1
16
JW925
MY,SP,AUS
MODEL
MODEL
MY,SP,AUS,CH
MODEL
MODEL
US,CND
MODEL
MODEL
47
STOP
I/R
CONT
IC181
I/O
BUFFER
Q182
RESET
Q181
11
14
12
5
33
2
LA
T
98
15
16
X102
7.28MHz
I/R
DET
IC180
LED
DRIVE
Q183,184
D184-186
URESET
TV/DBS
MONITOR
VIDEO 1
VIDEO 2
S-LINK
J204
J256
J255
J257
J258
LEVEL
CONTROL
Q257,258
BUFFER
Q253
11
4
LEVEL
CONTROL
Q255,256
LEVEL
CONTROL
Q254
3
2
5
6
7
1
IC254
SWITCH
Q251,252
ST-I/O
IC251
US,CND, AUS MODEL
1
MUT
D1202
D1203
2
-15V
REG
REG
IC402
3
3
+15V
REG
IC401
1
1
+12V
REG
IC403
3
3
+5V
REG
IC404
1
-15V
+15V
TU +12V
TU +5V
+32V
REG
+32V
Q801
D808
F805
1
+3.3V
REG
3
IC803
D5V
D3.3V
D3.3V
T901
F903
US,CND,CH
MODEL
MODEL
91
LED ON/OFF
DOUT
3
RY HP
RY FRONT A
FRONT B
RY CENTER
RY WOOFER
RY REAR
58
URESET
B
AB
US A1 IN
63
I/O
BUFFER
Q180
AB
US OUT
67
FLOURESCENT
INDICATOR TUBE
FL101
29
DIN
26
LA
T
34
CLK
24
CLR
4
LS
29
CLK
5
CL
30
DIN
FL D
A
T
24
FL CLK
21
FL LA
T
24
FL CLEAR
25
SPEAKER
SWITCH
FUNCTION
KEY
SP B
73
SP A
72
AD KEY6
44
MUTING
S102
6
FUNCTION
KEY
AD KEY1
38
S106,110,114,118
S122,126,128,130
S122,126,128,130
FUNCTION
KEY
AD KEY2
39
S105,109,113,117
S121,125,127,129
S121,125,127,129
FUNCTION
KEY
AD KEY3
40
S104,108,112
S116,120,124
S116,120,124
FUNCTION
KEY
AD KEY4
41
S103,107,111
S115,119,122
S115,119,122
FUNCTION
KEY
AD KEY5
43
S140-145,147
S132,133
S135-139,146
S134
49
MD0
87
LED BASS B
89
LED SOUND FIELD
92
LED DOLBY DIGIT
AL
LED
DRIVE
D100,108
D119,122
D119,122
Q107,108
Q119,122
Q119,122
14
LED SUR
15
LED EQ
16
LED INDEX
LED
DRIVE
D104-106
Q103,104
Q106
90
LED MUTE
LED
DRIVE
D101
Q102
5
LED TV/DBS
4
LED D
VD/LD
3
LED V3
LED
DRIVE
D111-113
D116-118
D116-118
Q111-113
Q118-116
Q118-116
8
LED CD
9
LED TUNER
10
LED PHONO
7
LED MD/D
A
T
6
LED T
APE
LED
DRIVE
D114,115
Q114,115
2
LED V2
1
LED V1
LED
DRIVE
D109,110
Q109,110
VIDEO 2
94
VIDEO 1
93
M B
U
S
96
TV
95
IC254
IC254
UP
55
DOWN
56
LED VOL
88
8
7
3
2
MOTOR
DRIVE
IC251
IC106
UP
DOWN
LED VOL
B
51
MD2
20
SINO
19
S
OTO
61
U
D
ATA
62
UCLOCK
60
UMREQ
59
USEQ
USREQ
UMREQ
UCLOCK
UDATA
SOTO
SINO
MD2
MD0
82
XO
83
XI
X101
IC105
IC104
FL DRIVE
FL DRIVE
RY POWER
• Abbreviation
CND :Canadian
MY
MY
:Malaysia
SP
:Singapore
CH
:Chinese
AUS
:Australian
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