Block Diagram - Power Section - Sony STR-DG520 Service Manual

STR-DG520
5-6. BLOCK DIAGRAM – POWER Section –
L-CH
R-CH
SL-CH
TUNER/
SR-CH
C
AUDIO
SECTION
(Page 15)
C-CH
SW-CH
PROTECTOR
FRONT_A_RY
SYSTEM
CONTROL
IC1101 (6/6)
C/SW/REAR/SB_RY
PRE_OUT_SW_RY
FUSE_DETECT
STR-DG520
PRE DRIVER
IC701
+VOUT1
2
IN 1 PRE
6 DRIVE -VOUT1
DRIVE
3
R-CH
-55V +B
PRE DRIVER
IC801
+VOUT1
IN 1 PRE 2
6 DRIVE -VOUT1
DRIVE
3
R-CH
-55V +B
PRE DRIVER
IC601
+VOUT2
IN 2 12
PRE
DRIVE -VOUT2
8
DRIVE
11
-55V +B
PROTECTOR
61 D320,325-327
Q320,321,325
D1108
FRONT RY
B-SWITCH
70 –55V
Q500,501
IC565
OVERLOAD
2 7
DETECT AMP
D1107
C/SUR RY
66
D1111
SW_PREOUT_RY
69
HP RY
HP_RY 62
HP DETECT
HP_DETECT 55
63
58
POWER_RY
STOP 48
POWER AMP
Q701-704
CURRENT OVERLOAD
DETECT DETECT
Q711,712 D720,Q720
R-CH R-CH
R-CH
POWER AMP
Q801-804
CURRENT OVERLOAD
DETECT DETECT
Q811,812 D820,Q820
R-CH R-CH
R-CH
POWER AMP
Q651-654
CURRENT OVERLOAD
DETECT DETECT
Q661,662 D670,Q670
+B
-B
-20V REG
-20V
Q930
TU+9V
+7V
-7V
IC1001
+5V
+A5V 3 1
REG
+5V
+7V
(VCC)
IC1904
+3.3V
+3.3V
3 1
(STBY)
REG
+9V
(STBY)
20 20
R-CH
RY375
RELAY
DRIVER
Q375
RY350
RELAY
DRIVER R-CH
Q350
TB604
R-CH
TB607
RY355
RELAY
DRIVER
Q355
RY301
RELAY
DRIVER
Q301
RECT
D921
IC4100
F4002
RECT
D4001
+5.8V
+5.8V 2 1
REG
F4001
IC1902
+9V
3 1
REG
IC350
+15V
RECT
+7V D910-913
3 1
REG
-7V
3 2
REG
IC352 -15V RECT
D940-943
IC1031
+5V
3 1
REG
F1
F2
-20V
D920
RY901
RELAY
DRIVER
Q901
D1001
RECT
D950-953
AC IN D990
DETECT
Q990
J790
PHONES
TB601
L
FRONT
R
SPEAKERS
IMPEDANCE
USE 8-16Ω
L
SURROUND
• Signal path
R
: TUNER (FM/AM)
• R-ch is omitted due to
same as L-ch.
CENTER
J405
AUDIO SUB
OUT WOOFER
T901
POWER
TRANSFORMER
(MAIN)
R910
R911
R940
T902
POWER
TRANSFORMER
(SUB)
~
AC IN
D991