Block Diagram - Display/Power Section - Sony STR-K785 Service Manual

Q Q
4-2. BLOCK DIAGRAM – DISPLAY/POWER SECTION –
3 7 6 3 1 5 1 5 0
• R-CH is omitted due to same as L-CH.
• Signal Path
: FM
MAIN
A
SECTION
(Page 14)
FL101
FLUORESCENT
INDICATOR TUBE
F1 F2
14 29 42 31
SEG1-16 GRID1-12
T E
L 1 3 9 4 2 2 9 6 5 1 3
IC100
FL DRIVE
7 8 9
IC101
BUFFER
59 60 47
w w w
82 83 38 39
X1101
24MHz
FUNCTION FUNCTION FUNCTION
KEY KEY KEY
S131-139
S100-108 S110-116
STR-K785
IC501
POWER AMP
Q503
+V OUT2 12
BOOSTER
Q501,502
LIMITER
L 8 IN2 NF2 9
Q505,506
Q504
-V OUT2 11 CURRENT
BOOSTER
DETECT
IC601
POWER AMP
Q603
+V OUT2 12
BOOSTER
Q601,602
LIMITER
SL SL 8 IN2 NF2 9
Q605,606
Q604
-V OUT2 CURRENT
11
BOOSTER DETECT
IC701
POWER AMP
Q703
+V OUT2 12
BOOSTER
Q701,702
LIMITER
C
8 IN2 NF2 9
Q705,706
Q704
-V OUT2 11 CURRENT
BOOSTER
DETECT
SW
D883
62 66 68 67 61 46
SYSTEM CONTROLLER
IC1101(3/3)
40 65 64 56
x a o
y
3 1
S152
. i ENCODER
?/1
RV102
MASTER
VOLUME
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RY502
Q509
RELAY
DRIVE
RY501
Q507 Q508
RELAY
AF POWER
DRIVE
PROTECT
RY601
Q607
Q608
AF POWER RELAY
PROTECT DRIVE
RY701
Q707
Q708
AF POWER RELAY
PROTECT DRIVE
D529
D729
Q Q
3 7 6
Q560
RELAY
DRIVE
Q881-883
PROTECT
SWITCH
55
FUSE DETECT 63
IC102
REMOTE
SIRCS 54 1 CONTROL
RECEIVER
AVCC 35
VCC3 84
VCC5 23
RSTX 77
STOP 48
58
u 1 6 3
.
15 15
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2 4
8 9 9
R-CH
J700
PHONES
TM600(1/2)
L
FRONT
R-CH R
TM602
L
SURROUND
R-CH R
SPEAKERS
IMPEDANCE USE 6-16Ω
TM600(2/2)
CENTER
+3.3V
+2.5V
J403
AUDIO OUT SUB WOOFER
+5V
3 RY702 1 5 1 5 0 8 9 2
POWER AMP Q860-862
+B
+B
SWITCH
+B
–B
Q851,852
POWER AMP
–B
–B
IC850(1/2) IC850(2/2) SWITCH
2 1 5 7
FL101 Q801
–20V –20V REG
RELAY
+B
IC821
AUDIO +7V
1
+7V REG
IC822
AUDIO
–7V
3
–7V
REG
IC1001 IC1902
AUDIO TUNER +10V
+5V
3 1 3
+5V +10V REG
REG
AEP
IC1071
TUNER +3.3V
3 1
3.3V REG
+3.3V(STBY)
IC1904
+3.3V
3
REG
IC1111
RESET
1 2
m
Q911
AC DET
c o
STR-K785
Ver. 1.1
2
8 9 9
IC1901
+3.3V
2
REG
4
+2.5V
5
REG
T901
D804-807
IC1031
+5V
3 1
REG
4 9 8 2 9 9
D811
R803
D920-923
3
2
1
F1
F2
1
D910-913
T902
AC
IN
D914 D915
RY901
Q901
RELAY
DRIVE