Read Sony STR-DE185 Service Manual online
STR-DE185
13
13
4-4. BLOCK DIAGRAM — POWER SECTION —
6
2
3
DRIVE
POWER AMP
Q701-704
BIAS
MUTE CONTROL
Q680
1
13 14 15
-24V
REG
Q904
+5V REG
IC902
3
1
+10V REG
IC903
3
1
6
7
8
2
5
3
RELAY DRIVER
Q783
RELAY DRIVER
Q903
RELAY DRIVER
Q901
+5.6V
REG
Q902
RELAY DRIVER
Q782
RELAY DRIVER
Q781
+B
-B
-24V
+5V
+10V
+5.6V
OUT C
V+
RESET
VSA
VSC
RESET/+5.6V REG
IC901
VSB/SESIN
F2
F2
RY982
F901
F902
RY981
RY781
R-CH
RY782
RY783
RECT
D901-904
RECT
D908-911
RECT
D907
D907
T901
POWER
TRANSFORMER
T902
POWER
TRANSFORMER
D905
D906
CNJ901
AC
OUTLET
SWITCHED 120W/1A MAX
AC 120V 60 Hz
(US)
SWITCHED 100W MAX
(AEP,UK)
~
AC IN
+B
-B
+B
MUTE
VCC1
VCC2
VEE
PRE DRIVER
IC601
PRE
DRIVE
IN 1
+VOUT
-VOUT
OVERLOAD
DET
Q705,706
PROTECT
SWITCH
Q784-786
R-CH
J803
PHONES
TM801
SPEAKERS
IMPEDANCE
USE 8-16
Ω
L
R
A
L
R
B
R-CH
R-CH
ST-L
ST-R
INV.
Q681
AC MUTE
HP RELAY
SPK A RELAY
SPK B RELAY
PROTECTOR SIG
R1 COIL RELAY
POWER RELAY
STOP SIGNAL
R-CH
MAIN
SECTION
1
D786
D787
D789
• Signal path
: FM/AM
• R-ch is omitted due to
same as L-ch.
same as L-ch.
(Page 12)
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