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11
11
STR-K740P/K840P
– DISPLAY/POWER Section –
IN2
8
12
+V OUT2
POWER AMP
IC701
POWER AMP
IC702
9
NF2
LIMITER
Q701,702
11
-V OUT2
IN2
12
+V OUT2
9
NF2
11
-V OUT2
BOOSTER
Q703
BOOSTER
Q704
CURRENT
DETECT
Q705,706
AF POWER
PROTECT
Q740
LIMITER
Q651,652
BOOSTER
Q653
BOOSTER
Q654
CURRENT
DETECT
Q655,656
IN+
1
6
+V OUT
POWER AMP
IC501
2
IN-
LIMITER
Q501,502
5
-V OUT
BOOSTER
Q503
BOOSTER
Q504
CURRENT
DETECT
Q505,506
D721
PROTECT
SWITCH
Q722,723,725
RELAY
DRIVE
Q790
RY791
RELAY
DRIVE
Q710
RY701
D731
RELAY
DRIVE
Q610
RY601
D733
RELAY
DRIVE
Q550
RY501
D734
IC401
5
7
RELAY
DRIVE
Q560
RY560
L
R
SR
SL
C
R-CH
R-CH
R-CH
PHONES
TM601
TM602
AUDIO
OUT
J405
67
PROTECTOR
68
HEADPHONE RELAY
72
PREOUT/FRONT RELAY
70
REAR RELAY
71
CENTER RELAY
69
WOOFER RELAY
LED DRIVE
Q100-104
RV102
ENCODER
3
1
VOL(B)
59
VOL(A)
60
POWER KEY
56
?/1
S145
77
RSTX
48
STOP
54
SIRCS
55
FUSE DETECT
REMOTE
CONTROL
RECEIVER
1
IC102
D910-913
AC
IN
T902
RY901
D915
F901
D914
RELAY
DRIVE
Q901
D820-823
23
VCC5
84
VCC3
-5V
REG
3
2
+5V
REG
3
1
-7V
REG
3
2
+7V
REG
1
3
AUDIO
+7V
VIDEO
+5V
VIDEO
-5V
IC801
IC802
IC807
IC804
POWER RELAY
66
RELAY
+B
D902-905
82
83
X0
X1
X1601
20.0MHz
F1
F2
L
SL
SL
C
SW
A
MUTING
1
MUTING
1
POWER
MUTING
Q747,748
22
AC MUTING
J791
FLUORESCENT
INDICATOR TUBE
FL101
61
DIN
62
CLK
63
FL_STB
7
DIN
8
CLK
9
STB
14 29
SEG1-16
42 31
GRID1-12
F1
F2
1
SW1
2
SW2
3
SW3
4
SW4
FL DRIVE
IC100
D111-114
29
BLUE LED
30
MODE LED
31
2CH LED
32
AFD LED
26
DCS LED
FUNCTION
KEY
A/D0
38
S110-119
S100-109
FUNCTION
KEY
A/D1
39
FUNCTION
KEY
A/D2
40
S120-128
FUNCTION
KEY
A/D3
41
S130-137,
S143,144
S143,144
B
RESET
SYSTEM CONTROL
IC1601(3/3)
• Signal Path
• R-CH is omitted due to same as L-CH
: FM
AF POWER
PROTECT
Q640
AF POWER
PROTECT
Q540
IC601
2
1
FRONT
SURROUND
CENTER
IC601
5
7
25
HP DETECT
BUFFER
IC101
D100-104
35
AVCC
+3.3V
REG
3
1
IC1904
AUDIO
-7V
D899
D898
+10V
REG
3
1
TUNER
+10V
IC1902
T901
+3.3V REG
Q471
Q921
AC DET
+3.3V
REG
3
1
IC1905
1
2
IC1602
TUNER
+3.3V
+3.3V
D802
+B
-B
-B SW
Q691,692
-30V REG
Q801
FL101
-30V
POWER AMP
-B
+5V
REG
3
1
IC1903
+5V
+2.5V
REG
5
+2.5V
+3.3V
REG
2
4
IC1901
+3.3V
+5V
REG
3
1
IC1503
AUDIO
+5V
SPEAKERS
SUB
WOOFER
MASTER
VOLUME
VOLUME
8
Q107-111
LED
DRIVE
RESET
+3.3V(STBY)
K740P:AEP,UK
K840P:AEP,UK
K840P:AEP,UK
S901
VOLTAGE
SELECTOR
K740P:E/K840P:E MODEL ONLY
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