Block Diagram - Power Section - Sony STR-DE725 Service Manual

3-3. BLOCK DIAGRAM – POWER SECTION –
POWER AMP(L)
IC501
+B 13 VCC
14 VCC +VE 2
-B 15 VEE
LIMITER
Q504
L 6 IN NF 5
LIMITER
Q505
1 MUT
-VE 3
POWER AMP(C/W)
IC601
+B 13 VCC
14 VCC +VE 12
-B 15 VEE
LIMITER
Q604
C 8 IN
NF 9
LIMITER
Q605
A
-VE 11
1 MUT
+VE 2
IN -VE 3
W 6
POWER AMP(SL)
IC701
+B 13 VCC
14 VCC +VE 2
-B 15 VEE
LIMITER
Q704
SL 6 IN NF 5
LIMITER
Q705
1 MUT
-VE 3
MUTE
AC MUTE
Q501,503
PROTECTOR
RY HP
B
RY FRONT A
FRONT B
RY CENTER
RY WOOFER
RY REAR
RY POWER
STOP
URESET
USREQ
UMREQ
UCLOCK
D
UDATA
SOTO
SINO
MD2
MD0
49 51 20 19 61 62 60
IC106
UP 8 3 55 UP
MOTOR
DRIVE
B
DOWN 7 2 56 DOWN
LED VOL 88 LED VOL
16
38
FUNCTION FUNCTION
KEY KEY
S106,110,114,118 S105,109,113,117
S122,126,128,130 S121,125,127,129
BOOSTER
Q506
Q511
PROTECTOR
Q509,510
BOOSTER CUR DET
Q507 Q508
BOOSTER
Q606
Q611
PROTECTOR
Q609,610
BOOSTER CUR DET
Q607 Q608
BOOSTER
Q706
BOOSTER CUR DET
Q707 Q708
PROTECTOR
Q547-549
D111-113
D109,110 D114,115 D116-118 D101
LED LED LED LED
DRIVE DRIVE DRIVE DRIVE
Q111-113
Q109,110 Q114,115 Q102
Q118-116
59 1 2 6 7 3 4 5 10 9 8 90
MODE CONTROL
IC102
39 40 41 43 44 72 73
FUNCTION FUNCTION FUNCTION FUNCTION SPEAKER
KEY KEY KEY KEY SWITCH
S104,108,112 S103,107,111 S102 S140-145,147 S132,133 S134 S131
S116,120,124 S115,119,122 S135-139,146
MUTING POWER
— 11 —
RY602
RELAY
DRIVE
Q601
RY501
RELAY
DRIVE
Q546
D1202
RY502
RELAY
R CH
DRIVE
Q596
RY601
D1203
RELAY
DRIVE
Q645
R CH
RY503
RELAY
DRIVE
Q544
R CH
RY701
RELAY
DRIVE
Q749
+B
-B
S501
IMPEDANCE
SELECTOR
D100,108
D104-106 D119,122
LED LED
DRIVE DRIVE
Q103,104 Q107,108
X101
Q106 Q119,122
16 15 14 92 89 87 91 82 83
SIRCS 26
URESET 58
RESET 77
STOP 47
74 21 24 25 24 67 63
34 26 24 29 4 5 30
Q180
I/O
BUFFER
DIN 29 3 DOUT
IC104 IC105
FL DRIVE FL DRIVE
F2 F1
FL101
FLOURESCENT
INDICATOR TUBE
R CH
J701
PHONES
L
TM501
FRONT
SPEAKER
R
C
TM701
S(L)
SURROUND
SPEAKER
S(R)
IC404
+5V
TU +5V 1
REG
J501
IC403
WOOFER
+12V
TU +12V 3
REG
IC401
+15V
+15V 1
REG
IC402
CNJ701
-15V
-15V 3
REG
WIRELESS
REAR
SPEAKER
IC702
+18V SWITCH
3 1
REG Q747,748
Q801
SWITCH +32V
+32V
Q618 REG
SWITCH SWITCH INV SW
Q612,615 Q613,616 Q617
IC809 IC809 +24V
+5V
8
1 3
REG
4
-24V
IC801
5V
3
D5V
REG
IC802
+3.3V
D3.3V 3
REG
IC803
+3.3V
D3.3V 3
REG
IC101
Q101
REMOTO
CONTROL
RECEIVER
DELAY
+5.6V +B SW
Q902
RESET
Q105
D901-904
3
POWER
8 CONT 5
IC901
6
J204
S-LINK
— 12 —
STR-DE725
• RCH is omitted
• Signal Path
:FM
:CD
3
1
3
2
T901
F801
D801
F802
F803
D802-805
F804
F805
D808
1
1
F2
1 F1
RY901
RELAY
DRIVE
Q901
CNJ901
JW925
T902
CNP901
AC IN