Block Diagram - Display/Power Section - Sony STR-K685 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. IC501
POWER AMP
• Signal Path
+V OUT2
: FM
L 8 IN2 NF2
-V OUT2
IC601
POWER AMP
+V OUT2
SL SL 8 IN2 NF2
-V OUT2
MAIN
A
SECTION
POWER AMP
(Page 14)
IC701
+V OUT2
C 8 IN2 NF2
-V OUT2
+V OUT1
T E
L 1 3 9 4 2 2 9 6 5 1 3
SW 6 IN1 NF1
-V OUT1
IC2000
MAIN AUTO CAL MIC
B
AMP
5
SECTION
(Page 15)
Q2001,2002
DC
CONTROL
68
82 X0
X1101
24MHz
X1
83
IC102
REMOTE
CONTROL 1 54 SIRCS
RECEIVER
9 16 17
w w w
STR-K685
Q503
12
BOOSTER
Q501,502
LIMITER
9
R-CH
Q505,506
Q504
11 CURRENT R-CH
BOOSTER
DETECT
R-CH
Q603
12
BOOSTER
Q601,602
LIMITER
9
SR-CH
Q605,606
Q604
CURRENT SR-CH
11
BOOSTER
DETECT
Q703
12
BOOSTER
Q701,702
LIMITER
9
Q705,706
Q704
11 CURRENT
BOOSTER
DETECT
Q753
2
BOOSTER
Q751,752
LIMITER
5
Q755,756
Q754
CURRENT
3
BOOSTER
DETECT
Q881-883
D841
PROTECT VACS
SWITCH
CONTROL
1
+7V
38 61 45
SYSTEM CONTROL
IC1101(2/2)
IC100
FL DRIVE
SEG1-17 14
7 DIN FL101
x 29 a o
IC101
y
31 FLUORESCENT F1
8 CLK
BUFFER
INDICATOR TUBE
F2
9 STB
42
. i
GRID1-11 32
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8
R-CH
Q507
AF POWER
PROTECT
TM602(1/2)
R-CH
RY551
Q608
RELAY
DRIVE
Q607
AF POWER SR-CH
PROTECT TM605(1/2)
RY601
R-CH
Q707
AF POWER
TM602(2/2)
PROTECT
RY701
Q708
RELAY
DRIVE
Q Q TM605(2/2)
3 7 6 3
R-CH
RY502
D1111
Q509
RELAY
DRIVE
D1110
D1107
62 66 69 55
39 40 64 65
3 2
FUNCTION FUNCTION
ENCODER
KEY KEY
u 1 6 3
S114-119 S103,104 RV102
MASTER
VOLUME .
15 15
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2 4
9 9
L
FRONT SPEAKERS
R
IC850
(IMPEDANCE USE 6-16Ω)
PROTECT
2 7
DET
Q851,852
POWER AMP
-B
-B
SWITCH
+B
L
SURROUND SPEAKERS
R -B
(IMPEDANCE USE 6-16Ω)
FL101 Q801
-20V -20V REG
IC1902
TUNER +10V
3
+10V REG
RELAY
+B IC821
+7V
AUDIO
CENTER SPEAKERS 1
+7V REG
(IMPEDANCE USE 6-16Ω)
IC1001
AUDIO +5V
3
+5V REG
IC822
AUDIO
-7V
3
-7V
REG
1 5 1 5 0 8 9 2
SUB
SPEAKERS
WOOFER
(IMPEDANCE USE 10-16Ω)
J790
PHONES
IC1031
+5V
+5V
3
REG
IC1901
+3.3V
+3.3V 2
REG
FUSE DETECT 63
+2.5V
+2.5V 5
REG
AVRH 36
AVCC 35
+3.3V
IC1904
VCC3 84
(STBY)
+3.3V
VCC5 3
23
REG
IC1111
RESET
RSTX 77 1 2
Q911
STOP 48
AC DET
POWER_RY 58
32 31 56
m
3 2
S152
ENCODER
?/1
c o
RV101
INPUT
SELECTOR
STR-K685
2
8 9 9
T901
D811
R803
D920-923
1
3
1
2
4 9 8 2 9 9
EXCEPT E51
E51
S901
VOLTAGE
SELECT
D804-807
1
F901
F1
4
F2
D1001 T902
D910-913
AC
1
IN
D914 D915
RY901
Q901
RELAY
DRIVE