Block Diagram - Display/Power Section - Sony STR-K685 Service Manual

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