Kenwood KRF-V7772D Service Manual page 22

AY AZ
MAIN UNIT (X09-62XX-XX) (A/5)
Q Q
3 7 6 3 1 5 1 5 0
J11 J1
Lch 1 1
1
PHONO
2
Rch 2
R21
Lch 3 3 7
1K
CD1
R22
Rch 4 4
22
1K
J12
R23
Lch 1 5 2
1K
REC
R24
2
Rch 2 6
27
1K
MD/TAPE
R25
7
Lch 3 5
1K
PLAY
R26
Rch 4 8 24
1K
AUDIO
J2
J13
R27
1 3
Lch 1
1K
REC OUT
R28
2
Rch 2 26
1K
CD2/TAPE2
MONITOR R29
3 8
Lch 3
1K
3
PLAY IN
R30
4
21
Rch 4
1K
J14
R31
Lch 1 5
1K
REC OUT
R32
Rch 2 6
25
1K
VIDEO1
R33
7
7
Lch 3
1K
T E
PLAY IN L 1 3 9 4 2 2 9 6 5 1 3
R34
8
Rch 4 22
1K
J3
4
R35
Lch 1
8
1K
VIDEO 2
PLAY IN
R36
Rch 2
21
1K
R37
Lch 3 10
1K
VIDEO 3
PLAY IN
R38
Rch 4
19
1K
R39
Lch 5 11
1K
VIDEO 4
PLAY IN
R40
X05-
Rch 6 18
CN1
1K
5
1/4 CN4
NC 15
A NC 14
SD 13 13
STEREO 12 12
X08-I/10
-CN3 Rch 11 27
GND 10
2/4
Lch 9
D37 D36 D35
+15V 8 +15V
B
-15V 7 15V
X08-A/10 T MUTE 6 6
-CN4
PLL DATA 5 5
PLL CLK 4 4
2/4
PLL C.E. 3 3
PLL DO 2 2
6
C
CH SP. 1 1
X08-A/10
-CN10
2/4
w w w
E
E2
X08-A/10
-CN5
2/4
WH2
E
G
CAUTION: For continued safety, replace safety critical components only with manufacturer's recommended parts (refer to parts list).
7
components. For continued protection against risk of fire, replace only with same type and rating fuse(s). To reduce the risk of electric shock, leakage-current or
resistance measurements shall be carried out (exposed parts are acceptably insulated from the supply circuit) before the appliance is returned to the customer.
BA BB
16.9V
+17V
IC1
R3 C3 R7 (1/2) PHNO EQ AMP
2.2K 10u50 100 5 8
C15+
7
+
6
4.7u35
C11 C13
+
0.012 3300P
R11 R13
270K 22K
R12 R14
270K 22K
+
C12 C14
0.012 3300P
C16
2
R4 C4 R8 1 4.7u35
2.2K 10u50 100 3
+
+
4
IC1
PHNO EQ AMP
(2/2) -16.6V
+17V +17V
16.9V
IC4
INPUT
SELECTOR
-16.6V
C65
330P
R75
4.7K
17V 17V
+17V +17V
R68
100
16.9V
IC5
INPUT
REC OUT
SELECTOR
C66
330P
-16.6V
R67
100
17V 17V
+17V +17V +17V
16.9V 16.9V
IC3 IC2
C49 R83 (1/2) C41 R81 (1/2)
3.3u50 470 5 8 C55 3.3u50 470 5 8
7 47u25 7
+ +
6 6
+
R73 R71
100 100
BUFFER REC AMP.
R74 R72
100 100
C56
2 2
C50 R84 47u25 C42 R82
1 1
3.3u50 470 3.3u50 470
3 3
+
+ +
4 4
IC3 IC2
-16.6V -16.6V
(2/2) (2/2)
D38
15V 17V 17V
+17V
1 2 3 4 5 6 7 8 1 2 3 4 5 6 7 7 6 5 4 3 2 1
CN3 CN6 CN8
x a o
y
. i
C
B
BC BD
0.6V
R17
0V
1K Q23
Q11-15
Q21
1ST
MUTE
-43.3V
FLch
0V
C127 R103 C101 R105
22u35 2.2K 22u35 100
6
+ +
0.7V
R96
1K
R18 Q11
1K
0.6V
0V
1ST Q24
Q22
-43.3V
FRch
C128 R104 C102 R106
22u35 2.2K 22u35 100
3
+ +
0V
R97
1K
0.7V
Q12
0.6V
0V
Q63
1ST
Q61
-43.3V
Cch
C327 R303 C301 R305
22u35 2.2K 22u35 100
4
+ +
0V
R100
0.7V
1K
Q15
FAST OFF
Q R361 Q
Q80
22 1/4W
16.8V 3 15.6V 7 6
16.2V
R360 C352
0.6V
47K 0V 16.2V R363 1000P
0V
100
D90
+ +
Q43
Q41
+
Q79
-43.3V
LSch 1ST
C227 R203 C201 R205
22u35 2.2K 22u35 100
7
+ +
R98 0V
1K
0.7V
Q13
0.6V
C47
0V
47u25
+
Q44
1ST Q42
-43.3V
RSch
C228 R204 C202 R206
22u35 2.2K 22u35 100
2
+ +
C48
47u25 0V
R99
1K 0.7V
+
Q14
17V
+17V
17V 17V
u 1 6 3
indicates safety critical
BE BF
R109
2 4 Q101-110
8 9 9
56.6V
R119 220
FINAL TR.
10K
1/4W R121
0V 220 1/4W
42.7V
42.1V
1.1V Q101
1.2V
C117
R133
Q29
150P 47 1/4W 1
+
IDLE FLch
2
-15.7V
0.4V
-1.2V
5
Q103 1
Q25 Q27
-43.3V 4
0.3V -1.1V
R135 5
-43.9V
C149
+ 47 1/4W
47P
2ND
D51
55V
-56.6V
R110
56.6V
R120 220
10K
R122
1/4W
0V 220 1/4W 1.1V
42.7V
42.1V Q102
C118
R134
Q30
1.2V 47 1/4W 1
150P
+ IDLE FRch
2
-1.2V 0.4V
5
1
-15.7V
4
Q26
-43.3V
-1.1V
0.3V
Q28 R136
-43.9V 5
C150
+ 47 1/4W
47P
2ND
D52 Q104
55V
-56.5V
R309 R319 220 1/4W
56.6V
10K R321
Q69
42.7V 220 1/4W
42.1V
0V
1.1V
C317 Q109
R333
150P
47 1/4W 1
1.2V
+
IDLE Cch
2
-1.2V
0.4V
5
-15.7V
1
Q65
4
-43.3V
-1.1V
Q67 0.3V
R335 5
-43.9V
C349 47 1/4W
47P
2ND
Q110
D91
-56.5V
55V
3 1 5 1 5 0 8 +55V 9
55V
R209 R219 220 1/4W 56.5V
R221
10K
Q49 220 1/4W
42.7V
42.1V
0V
1.1V
C217 Q105
R233
150P
47 1/4W 1
1.2V
+
IDLE LSch
2
-1.2V
0.4V
5
-15.8V
1
4
Q45 -43.3V
0.3V -1.1V
Q47
R235 5
-43.9V
C249 47 1/4W
47P
2ND
Q107
D71
55V
-56.5V
R210
56.6V
R220 220
10K
R222
1/4W
0V
42.7V 220 1/4W
42.1V 1.1V Q106
C218
R234
Q50
47 1/4W 1
1.2V 150P
+
IDLE RSch
2
-1.2V 0.4V
5
1
-15.7V
4
Q46 -43.3V
0.3V -1.1V
Q48
R236 5
-43.9V
C250
+ 47P 47 1/4W
2ND
Q108
D72
55V
-56.5V
+17V
17V
m
c o
.
The DC voltage is an actual reading measured with a high impedance type voltmeter with no signal input.
The measurement value may vary depending on the measuring instruments used or on the product.
BG BH
2
8 9 9
+56V
D55 D59
R147
100 1/4W R143
3 55.2V
0V 3.3K 0V
Q31
1/4W R86
Q31-34,
22 1/4W
CN21 R145
0V 51-54,71,73
4
1 750 CURRENT L2
C125 LIMIT
2
0V
0.01
2
R85
0V Q33 22 1/4W
0V
L1
R149
D57
3
100 1/4W -1.0V
57V
+56V
D56 D60
R148
100 1/4W
R144
3 55.2V
3.3K 0V
0V
1/4W Q32
CN22 R146
0V
4
1 750
C126
2
0V 0.01
L4
2
R88
R154
22 1/4W
Q34
0V 47K
0V
R150
D58
3 100 1/4W
-1.0V
R87
22 1/4W
L3
57V
+56V
L5
D93 D95
R347
R89
100 1/4W 22 1/4W
3 R343 55.2V
3.3K
0V 0V
Q71
1/4W
CN25 R345
0V
4
1 750
C325
2
0V 0.01
2 IDLE T.P.1-5
13.2mV(30mA)
Q73
0V R353
0V
47K
R349
3 D94
100 1/4W -1.0V
57V
2 4 9 8 2 9 9 +55V
+56V
D75 D79
R247
100 1/4W
R243 55.2V
3
0V 3.3K 0V
Q51
1/4W
CN23 R245
0V
4
1 750
C225
2
0V
0.01
2
Q53
0V R253
0V
47K
R249
3 D77
100 1/4W
-1.0V
+
57V
+56V
D76 D80
R248
100 1/4W R244
3 55.2V
3.3K
0V 0V
Q52
1/4W
CN24 R246 0V
4
1
750
C226
2
0V 0.01
R382
2
R254 R391 6.2K
0V Q54
47K 100K
0V 0V
R392
R250 100K +
3 D78
100 1/4W -1.0V
57V
+17V
17V