Block Diagram - Power Section - Sony STR-DE485 Service Manual

4-6. BLOCK DIAGRAM — POWER SECTION —
IN 2
PRE
FL-CH 8
DRIVE
FR-CH R-CH
TUNER/
IN 2 PRE
SL-CH 8
4
AUDIO DRIVE
SECTION
(Page 16)
SR-CH R-CH
IN+ PRE
C-CH
1
DRIVE
PROTECTOR
HEADPHONE
RELAY
PREOUT/FRONT
RELAY
REAR RELAY
CENTER RELAY
HP DETECT
SYSTEM
CONTROL
IC1601 (4/4)
POWER RELAY
• Signal path
: TUNER (FM/AM)
• R-ch is omitted due to
same as L-ch.
PRE DRIVER
IC701
+VOUT2
12
DRIVE -VOUT2
POWER AMP
11
Q701-704
-BB +B
PRE DRIVER
IC702
+VOUT2
12
DRIVE -VOUT2
11 POWER AMP
Q651-654
-BB +B
PRE DRIVER
IC501
+VOUT
6
DRIVE -VOUT
5 POWER AMP
Q501-504
-BB +B
PROTECTOR
67 D721,722
Q722,723,725
D734
D733
D731
+B
HP-RY
68
-B
-BB
FRONT-RY
72
REAR-RY
70
CENTER-RY
71
IC601
HP DETECT
OVERLOAD
25
2 7
DETECT AMP
66
STOP 48
RELAY
CURRENT OVERLOAD DRIVER
DETECT DETECT Q790
Q705,706 D740,Q740
R-CH R-CH RELAY
DRIVER
R-CH
Q710
RELAY
DRIVER
CURRENT OVERLOAD
Q610
DETECT DETECT
Q655,656 D640,Q640
RELAY
R-CH R-CH
DRIVER
Q510
R-CH
CURRENT OVERLOAD
DETECT DETECT
Q505,506 D540,Q540
-30V REG
-30V
Q801
IC1905 IC1902
Q691
+3.3V +10V
TU+3.3V 3 1 3
REG REG
Q692
AEP,UK M0DEL
TU+10V
IC801
+7V
3
+7V
REG
-7V
3
-7V
REG
IC1503
IC802
+5V
+5V-2 3 1
REG
IC1903
+5V
+5V-1 3
REG
IC1901
+2.5V 5
BACK-UP
4
SWITCH
+3.3V 2
IC1904
+3.3V
+3.3V
3
(STBY)
REG
19 19
STR-DE485/DE485E
J791
PHONES
R-CH
TM602
L
FRONT
R-CH
RY791 R
TM601
RY701
RY601
L
SURROUND
R-CH
RY501
R
CENTER
T901
POWER
RECT
TRANSFORMER
D802
D898,899
DOUBLER
1
COMMUTATION
-1
RECT
D820-822
+V
SELECTOR
1
-2
2
RECT
D902-905
-V
-3
JW905
1
F1
EXCEPT
F2
E
M0DEL
-30V
F901
D804
RY901
RELAY
DRIVER
Q901
T902
POWER
RECT
TRANSFORMER
D910-913
1
Q921
D914 D915
SPEAKERS
IMPEDANCE
USE 8-16Ω
E M0DEL
S901
VOLTAGE
220V
240V
120V
~
AC IN