Block Diagram - Power Section - Sony STR-DE185 Service Manual

4-4. BLOCK DIAGRAM — POWER SECTION —
ST-L
ST-R R-CH
INV.
Q681
MUTE CONTROL
AC MUTE
Q680
HP RELAY
SPK A RELAY
SPK B RELAY
PROTECTOR SIG
R1 COIL RELAY
MAIN
1
SECTION
(Page 12)
POWER RELAY
STOP SIGNAL
PRE DRIVER
IC601
PRE
DRIVE
+VOUT
2
IN 1
POWER AMP
6
DRIVE
Q701-704
-VOUT
3
BIAS
+B
1 13 14 15
-B
+B
+B
-B
-24V
REG
-24V
Q904
+5V
+10V
+5.6V
13
OVERLOAD
DET
Q705,706
PROTECT
SWITCH
Q784-786
RELAY DRIVER
R-CH
Q781
D786
RELAY DRIVER
Q782
D787
RELAY DRIVER
Q783
D789
RELAY DRIVER
RY981 T901
Q903
POWER
TRANSFORMER
RECT
D907
RECT
D908-911
+5V REG
3 1
IC902
F2
+10V REG
3 1
IC903
F2
RY982
RELAY DRIVER
Q901
RECT
D901-904
+5.6V
REG
Q902
T902
POWER
3 5
TRANSFORMER
D905 D906
OUT C V+
8 RESET
7 6
VSA VSB/SESIN
2 VSC
RESET/+5.6V REG
IC901
13
R-CH
J803
PHONES
L
A
R-CH
R
TM801
SPEAKERS
IMPEDANCE
USE 8-16Ω
L
RY781
B
R-CH
RY782
R
RY783
F902
F901
CNJ901
AC
OUTLET
SWITCHED 120W/1A MAX
AC 120V 60 Hz (US)
SWITCHED 100W MAX
(AEP,UK)
~
AC IN
• Signal path
: FM/AM
• R-ch is omitted due to
same as L-ch.
STR-DE185