Kenwood KRF-V7771D Service Manual page 29

BI BJ
Q Q
3 7 6 3 1 5 1 5 0
R421 5.6K
C427 390P
+B
FLch
16.3V
R935 C419 R415 R417
2K 47u25 1.8K 1.2K
6
( 21 ) -
+
5
+
IC76
(1/2)
80 5.0V
MCAS
80
79 5.0V
MRAS 79 21KHz LPF
78 5.0V
MWR 78
77 5.0V
MRD 77
76 5.0V
GPI00 64
75 IC76
GPI01
(2/2)
74
GPI02
3
73 R936 C420
+
GPI03
2K 47u25 R416 R418 2
72 ( ) -
22
GNDD +
1.8K 1.2K
71 0.4V
-16.5V
MD0 71 C543
70 5.0V 0.1
FRch
VCCD +B C428 390P
69 0.4V
MD1 69
R422 5.6K
68 0.4V
MD2 68
67 0.4V
MD3 67
66
IC78
GNDD
C445
(1/2)
65
2700P
MD4
CENTERch
64
MD5
21KHz LPF
63 R937 C441 R435 R437
MD6
1.3K 1u50 1.2K 820
T E
62 ( )
L 1 3 9 4 2 2 9 6 5 1 3 23
MD7 +
61
DR
R938 C442
180 1u50 R436 R438
( )
24
+
1.2K 2.4K
80KHz LPF
C446
SUB WOFFERch
0.033
IC80
C467 (1/2)
SLch 2700P
R939 C463 R451 R453
1.3K 1u50 1.2K 820
( 25 )
+
R940 C464
1.3K 1u50 R452 R454
( 26 )
+
1.2K 820
C468
SRch 2700P
IC80
(2/2)
CAUTION: For continued safety, replace safety critical com-
ponents only with manufacturer's recommended parts (refer to
parts list). indicates safety critical components. For contin-
ued protection against risk of fire, replace only with same type
and rating fuse(s). To reduce the risk of electric shock, leak-
w w w age-current or resistance measurements shall be carried out
(exposed parts are acceptably insulated from the supply cir-
cuit) before the appliance is returned to the customer.
.
BK BL
-B
+B
+B
RELAY CONT2
CN12
R921 2.2K
( 95 ) 15 B MUTE
R922 2.2K
RELAY CONT1
( 14 ) 14 A MUTE
R923 2.2K
+B
( 97 ) 13 -20dB ATT
R924 2.2K
8 R423 ( 12 ) 12 SW MUTE
7 100
11 FL
10 GND
9 FR
8 GND
S
7 C
( 99 ) 6 S MUTE
5 SW
G
4 GND
R424
3 SL
100
1
2 GND
4
1 SR
-B
16.3V
+B
5 8 R443
+ 7 100
6
-
R441 30K
C449 33P
C450 100P
R442 15K
R444
2
100
- 1
J15
3
+
4
IC78
(2/2)
SL16
TEXT
-16.5V
16.3V
J16
+B
R459 C953
5 8
SYSTEM
100 47u25
+ 7
6 CONTROL J17
- +
R457 30K
C471 33P
21KHz LPF
C472 33P
R458 30K
R460 C954
2
- 1 100 47u25
3
+ +
4
B
-16.5V
x a o
y
i
BM BN
8
+B
CN16
12V 1 +12V +12V
Q51
R977 14.1V
2
470 1/4W
GND 3
Q53
E
R978 0V 14.1V
4
470 1/4W
GND 5 0V
14.0V
Q52
14.1V
Q51-54
R799 Q54
EXT.
2.7K RELAY
14.2V
REP. ON/OFF
Q55
DRIVE
R798
100
0V
D
Q56
R981
REP OUT 6
22K 5.0V
0V
0V
IR-IN 7
R988 Q56
REP.
IR OUT 8
100 CONTROL
TV SENSOR 9
IR-OUT
ON/OFF
R800 2.2K
+B +B
5.1V 5.1V
38-54KHz
Q66
5.1V
455KHz 0V
FILTER
R979 FILTER R982
Q Q58 Q
5.1V 0V
1K R986 22K
10K 3 7 6 3
D72 D109
Q57
0V
Q64
C918 5.1V
D62
330P
0V
0V
0V
5.1V
Q65
L701 L702
0V
100mH 100mH
R835
L63
1 100
D76 D75
L64
R836
2
100
+B
3
DATA
L71
L70
4
5
BUSY
6
7
8
C594
9 0.01 R803
+B
2.2K
SL16
S1
XS8
u 1 6 3
.
BO BP
2 4
9 9 8
C942 D64
+B +B
0.1
D65
+B
C943
0.1
R762
5.0V
10K
C632
IC70
IN
1u50
OUT
+
RESET
GND
IC 5.0V
+5V
R845 47K
R767 47K
+12V
R768 47K
R769 47K
R770 47K
R771 47K
R750 100 4.9V 31
( 31 ) STEREO
R749 100
4.2V 32
( 32 ) PLL DO
33
AVSS
5.0V 34
( 35 ) SUB RESET
R748 100K 4.9V 35
SYNC
4.9V 36
AVREF
+5V
R747 100 0V 37
CD TEXT RX
4.9V 38
CD TXET TX
R746 47K 0V 39
CONT-P
40
VSS
R745 100 0V 41
( 41 ) SDT
0V 42
( 42 ) MDT
17 0V 43
( 43 ) MCK
5.0V 44
( 44 ) MREQ
R744 100 0V 45
( 45 ) SREQ
R743 100
1.2V 46
( 46 ) FL DOUT
0V 47
1 5 1 5 0 8 9 2 4
( 47 ) FL DIN
4.9V 48
( 48 ) FL CLK
4.7V 49
( 49 ) FL STB
R742 47K
5.0V 50
CONT-A
F
R909 100
(
10 )
R717 47K
+B
R718 47K
D58
R736
R719 47K
D60
330
R720 47K
R735 100K
R734 100K
R723 47K
R733
D61
330
D59 R724 47K
R725 47K
R726 47K
R727 47K
R729 47K
m +B
+12V
c o
1 2 3 4 5 6 7 8 9 10 11
CN19
F
BQ BR
2
9 9
+5V
+B +B
Q60
X3
RESET 4.194MHz
5.0V
Q60
+
R761
+
1K
0V
+5V
IC69
MAIN
u-COM
9 8 2 9 9
+B
+12V
1 2 3 4 5
CN17
R