Block Diagram - Display/Power Section - Sony STR-K680 Service Manual

3-2. BLOCK DIAGRAM – DISPLAY/POWER SECTION –
• 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
IC100
FL DRIVE
7 8 9
IC101
BUFFER
59 60 47
82 83 38 39 40
X1101
24MHz
FUNCTION FUNCTION FUNCTION
KEY KEY KEY
S131-139
S100-108 S110-116
STR-K680/K780
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 IN2 NF2 9
8
Q605,606
Q604
-V OUT2 11 CURRENT
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
Q754
+V OUT1 2
BOOSTER
Q571,572
LIMITER
SBL 6 IN1 NF1 5
Q755,756
Q753
-V OUT1 3 CURRENT
BOOSTER
DETECT
SW
D883
62 66 68 67 61 46
SYSTEM CONTROLLER
IC1101(3/3)
65 64 56
3 1
S152
ENCODER
?/1
RV102
MASTER
VOLUME
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
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 1
STOP 48
58
15 15
R-CH
J700
PHONES
TM600(1/2)
L
FRONT
R-CH R
K680
TM601(1/2)
L
SURROUND
R
R-CH
TM602
SPEAKERS
IMPEDANCE USE 6-16Ω
L
SURROUND
R
R-CH
K780
TM600(2/2)
CENTER
TM601(2/2)
SUB
WOOFER
K680
+3.3V
K780
+2.5V
J403
AUDIO OUT SUB WOOFER
+5V
RY702
Q860-862
POWER AMP
+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 3
+7V REG
IC822
AUDIO –7V
3 2
–7V REG
IC1001 IC1902
AUDIO TUNER
+5V +10V
3 1 3 1
+5V REG +10V REG
AEP,UK,RU
IC1071
TUNER +3.3V
3 1
+3.3V REG
+3.3V(STBY)
IC1904
+3.3V
3 1
REG
IC1111
RESET
2
Q911
AC DET
STR-K680/K780
Ver. 1.1
IC1901
+3.3V
2
REG
4
+2.5V
5
REG
T901
D804-807
IC1031
+5V
3 1
REG
D811
R803
D920-923
E51
S901
VOLTAGE
SELECT
F1
F2
D910-913
T902
D914 D915
RY901
Q901
RELAY
DRIVE
AC
IN