Block Diagram - Display/Power Section - Sony STR-K990 Service Manual

STR-K990
Q Q
4-2. BLOCK DIAGRAM – DISPLAY/POWER SECTION –
3 7 6 3 1 5 1 5 0
SW
IC701
POWER AMP
+V OUT2 12
L 8 IN2 NF2 9
-V OUT2 11
MAIN A
IC601
SECTION POWER AMP
(Page 15)
+V OUT2 12
SL SL 8 IN2 NF2 9
-V OUT2 11
IC501
POWER AMP
+V OUT2 12
C 8 IN2 NF2 9
-V OUT2 11
T E
L 1 3 9 4 2 2 9 6 5 1 3
J2000 IC2000
AMP
AUTO CAL MIC 5
82 X0
X1101
24MHz
83 X1
IC103
REMOTE
CONTROL 2 54 SIRCS
RECEIVER
9
w w w
STR-K990
Q703
BOOSTER
Q701,702
LIMITER
Q740
AF POWER
Q705,706 PROTECT
Q704
CURRENT R-CH
BOOSTER
DETECT
R-CH R-CH
Q653
BOOSTER
Q651,652
LIMITER
Q640
AF POWER
Q655,656 PROTECT
Q654
SR-CH
CURRENT
BOOSTER DETECT
SR-CH
Q503
BOOSTER
Q501,502
LIMITER
Q540
AF POWER
Q505,506 PROTECT
Q504
CURRENT
BOOSTER
DETECT
SR-CH
R-CH
1
Q722,723,725 D841
Q793,795 VACS
PROTECT
CONTROL
SWITCH
38 61 45
SYSTEM CONTROLLER
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
x a o
. i
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J309
AUDIO OUT SUB WOOFER
RY560
Q560
RELAY
DRIVE
TM602
L
RY710
FRONT B
Q611 R-CH R
RELAY
DRIVE
TB001
L
FRONT A
RY701
R-CH R
Q710
RELAY
DRIVE
L
SURROUND
RY601
SR-CH R
Q610
RELAY
DRIVE
TM604
CENTER
RY610
Q612
RELAY
DRIVE
Q Q
3 7
J790
R-CH
PHONES
RY791
Q790
RELAY
DRIVE
D1107
D1108
D1109
D1110
D1111
70 67 66 69 62 55 72 89
FUSE_DETECT
POWER_RY 58
64 65 32 31 39 40 56
3 2 3 2
FUNCTION FUNCTION
ENCODER ENCODER
KEY KEY
RV102 RV101 S109-112,115 S101-108
MASTER INPUT
VOLUME SELECTOR
u 1 6 3
y
16 16
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2 4
8 9 9
IC807
+5V
VIDEO
2 1
+5V REG
IC1902
D920-923
TUNER +10V
3 1
+10V
REG
RELAY
+B
IC801
+7V
AUDIO
1 3
REG
+7V
IC1001
AUDIO +5V
3 1
+5V
REG
IC802
AUDIO
-7V
3 2
-7V REG
IC804
-5V
VIDEO
2 1
REG
-5V
D4001
SPEAKERS
IC1906 IC4001
(IMPEDANCE USE 6-16Ω)
DMPORT +5V +7V
4 2 2 1
+5V REG REG
D802
+B
-B
R803
FL101 Q801
-20V -20V REG
Q691,692
POWER AMP
-B
-B
SWITCH
IC691
PROTECT
2 7
DET
6 3 1 5 1 5 0 8 9
RY801
Q809
RELAY
DRIVE
IC5003
HDMI
+3.3V
3 1
+3.3V REG
IC5006
HDMI +5.8V
4 2
+5.8V REG
1
D805-808
IC1031
+5V
+5V 3 1
REG
IC1903
+3.3V
+3.3V 2
REG
63 4
+2.5V
+2.5V 5
REG
AVRH 36
D1001
AVCC 35 D910-913
+3.3V
IC1904
VCC3 84
(STBY)
+3.3V
3 1
VCC5 23
REG
IC1111
1 RESET 2
RSTX 77
D914
Q921
STOP 48
AC DET
Q901
RELAY
DRIVE
• R-CH is omitted due to same as L-CH.
S100
?/1
• Signal Path
: FM
m
c o
.
2
8 9 9
T901
F4001
F4002
2 4 9 8 2 9 9
F1
F2
F901
T902
AC
IN
D915
RY901