Block Diagram - Display/Power Section - Sony STR-K900 - Fm Stereo/fm-am Receiver Service Manual

3-2. BLOCK DIAGRAM – DISPLAY/POWER SECTION –
• R-CH is omitted due to same as L-CH.
L
• Signal Path
: FM
MAIN
A
SL SL
SECTION
(Page 16)
C
SBL
FL101
FLUORESCENT
INDICATOR TUBE
F1 F2
14 29 42 31
IC100
SEG1-16 GRID1-12
FL DRIVE
7 8 9
IC101
BUFFER
FL_DATA
MAIN B
FL_CLK
SECTION
(Page 16)
9
82 83
X1101
24MHz
S108-111,115
J2000
5
AUTO CAL MIC
STR-K880/K900
IC701
POWER AMP
Q703
+V OUT2 12
BOOSTER
Q701,702
LIMITER
8 IN2 NF2 9
Q705,706
Q704
-V OUT2 11 CURRENT
BOOSTER
DETECT
IC601
POWER AMP
Q653
+V OUT2 12
BOOSTER
Q651,652
LIMITER
8 IN2 NF2 9
Q655,656
Q654
-V OUT2 11 CURRENT
BOOSTER
DETECT
POWER AMP
IC501
Q503
+V OUT2 12
BOOSTER
Q501,502
LIMITER
8 IN2 NF2 9
Q505,506
Q504
-V OUT2 11 CURRENT
BOOSTER
DETECT
Q533
+V OUT1 2
BOOSTER
Q571,572
LIMITER
6 IN1 NF1 5
Q535,536
Q534
-V OUT1 3 CURRENT
BOOSTER
DETECT
D721
Q722,723,725
PROTECT
SWITCH
61
SYSTEM CONTROL
IC1101(2/2)
39 40 38 64 65 32 31
3 1 3
FUNCTION FUNCTION
ENCODER ENCODER
KEY KEY
S101-107 RV102 RV101
MASTER INPUT
VOLUME SELECTOR
IC2000
AMP 1
RY791
Q790
RELAY
DRIVE
Q740
AF POWER
RY701
PROTECT
Q710
RELAY
DRIVE
R-CH
RY601
Q640
Q610
AF POWER
RELAY
PROTECT
DRIVE
RY600
Q800
RELAY
DRIVE
Q540 RY501
AF POWER
Q550
PROTECT
RELAY
DRIVE
Q580
AF POWER
PROTECT
D1110
D1108
D1107
D1111
55 62 66 69 68 67
BRIGEABLE RY
FUSE DETECT
56 58
1
S100
?/1
17 17
R-CH
J791
PHONES
TM601
L
FRONT A
R-CH R
SR
SURROUND
SL
SPEAKERS
IMPEDANCE USE 6-16Ω
TM602
L
FRONT B
R-CH R
TM501
C CENTER
FL101
-20V -20V REG
+B
SURROUND
SB -B
BACK
Q691,692
POWER AMP
-B
SWITCH
IC691 IC691
2 1 5 7
K880
IC1901
+3.3V 2
+2.5V 5
IC1031
+5V 3
TUNER
3
+3.3V
AEP, UK
TUNER
3
+10V
RELAY
+B
AUDIO
1
+7V
72
63
IC1001
AUDIO
IC102
3
+5V
REMOTE
SIRCS 54 1 CONTROL
RECEIVER
AUDIO
3
-7V
AVCC 35
+3.3V
IC1904
VCC3 84 (STBY)
VCC5 23 3
IC1111
RSTX 77 1 RESET 2
STOP 48
STR-K880/K900
Q801
R803
T901
D802
-B
Q809
RELAY
DRIVE
RY801 RY802 RY803
+3.3V CND
EXCEPT
REG CND
4
+2.5V
REG
D805-808
+5V
1
REG
IC1071
EXCEPT
+3.3V E51
1
REG
S901
IC1902
D920-923 VOLTAGE
+10V
1
SELECT
REG
IC801
+7V
E51
3
REG
F901
+5V
1
F1
REG
IC802
F2
-7V
2
REG
T902
D910-913
+3.3V AC
1
REG IN
D914 D915
Q921
AC DET
RY901
Q901
RELAY
DRIVE