Read Sony STR-DE685 Service Manual online
STR-DE685
21
21
4-6. BLOCK DIAGRAM — POWER SECTION —
8
12
11
DRIVE
POWER AMP
Q701-704
CURRENT
DETECT
Q705,706
RY851
RY701
RY601
PRE DRIVER
IC701
IN 2
+VOUT2
-VOUT2
SPEAKERS
IMPEDANCE
USE 8-16Ω
R
L
FRONT A
L
SURROUND
CENTER
R
R-CH
R-CH
R-CH
FL-CH
FR-CH
SL-CH
C-CH
R-CH
SR-CH
R-CH
TUNER/
AUDIO
SECTION
4
RY901
D804
F1
F2
-30V
+3.3V
(STBY)
+2.5V
+5V-1
-7V
+7V
TU+10V
TU+3.3V
-30V
F901
RECT
D910-913
T902
POWER
TRANSFORMER
D914
Q921
D915
D731
D734
D733
~
AC IN
OVERLOAD
DETECT
D740,Q740
1
67
6
5
DRIVE
POWER AMP
Q501-504
CURRENT
DETECT
Q505,506
-30V REG
Q801
RELAY
DRIVER
Q901
PRE DRIVER
IC501
IN+
+VOUT
-VOUT
OVERLOAD
DETECT
D540,Q540
DOUBLER
COMMUTATION
8
12
11
DRIVE
POWER AMP
Q651-654
CURRENT
DETECT
Q655,656
PRE DRIVER
IC702
IN 2
+VOUT2
-VOUT2
OVERLOAD
DETECT
D640,Q640
RELAY
DRIVER
Q851
RY791
RELAY
DRIVER
Q790
RELAY
DRIVER
Q710
RELAY
DRIVER
Q610
RY501
RELAY
DRIVER
Q550
70
72
68
PROTECTOR
D721,722
Q722,723,725
17
66
48
71
OVERLOAD
DETECT AMP
7
2
IC601
Q692
Q691
+B
-B
-BB
+3.3V
REG
1
3
IC1905
BACK-UP
SWITCH
4
5
+3.3V
2
IC1901
+5V-2
+5V
REG
1
3
IC1503
+10V
REG
1
3
IC1902
-V
+V
+7V
REG
1
3
IC801
-7V
REG
2
3
IC802
+5V
REG
1
3
IC1903
+3.3V
REG
1
3
IC1904
R-CH
R-CH
R-CH
-BB +B
-B
+B
-B
+B
-B
+B
-BB +B
-BB +B
R-CH
R-CH
R-CH
RECT
D802
D802
RECT
D820-822
RECT
D902-905
T901
POWER
TRANSFORMER
D898,899
TM601
TM602
R
FRONT B
L
R-CH
TM603
J791
PHONES
S901
VOLTAGE
SELECTOR
220V
240V
120V
SPK B-RY
HP-RY
FRONT-RY
REAR-RY
CENTER-RY
HP DETECT
HP-RY
SPK B-RY
FRONT-RY
REAR-RY
CENTER-RY
HEADPHONE
RELAY
PREOUT/FRONT
RELAY
REAR RELAY
PROTECTOR
SPK B RELAY
POWER RELAY
STOP
CENTER RELAY
25
HP DETECT
HP DETECT
E,JE M0DEL
AEP,UK M0DEL
EXCEPT
E,JE
M0DEL
E,JE
M0DEL
EXCEPT
E,JE
M0DEL
E,JE
M0DEL
E,JE,MX,TW M0DEL
EXCEPT CH,AR,KR M0DEL
US,CND,AEP,UK,
AUS,SP,MY MODEL
AUS,SP,MY MODEL
SYSTEM
CONTROL
IC1601 (4/4)
PRE
DRIVE
PRE
DRIVE
PRE
DRIVE
-1
-2
-3
JW902
F902
J911
AC
OUTLET
JW905
• Signal path
: TUNER (FM/AM)
• R-ch is omitted due to
same as L-ch.
same as L-ch.
• Abbreviation
CND: Canadian model
AUS: Australian model
JE : Tourist model
CH : Chinese model
MX : Mexican model
SP : Singapore model
MY : Malasia model
TW : Taiwan model
AR : Argentina model
KR : Korean model
CND: Canadian model
AUS: Australian model
JE : Tourist model
CH : Chinese model
MX : Mexican model
SP : Singapore model
MY : Malasia model
TW : Taiwan model
AR : Argentina model
KR : Korean model
(Page 17)
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