Kenwood KRF-V7771D Service Manual page 33

CW CX
X11-C/7
-CN7
Q Q
1/6
3 7 6 3 1 5 1 5 0
B
1
X11-A/7
-CN3
4/6
M
X11-A/7
-CN4
4/6
N
2
X11-A/7
-CN1
4/6
O
3
X11-B/7
T E
-CN2 L 1 3 9 4 2 2 9 6 5 1 3
2/6
4
H
X11-B/7
-CN10
2/6
G
(X25- ) (F/7)
J3 G
D55
P1
X25-B/7
-CN11
C
2/6
5
D
X25-B/7
-CN27
Y
2/6
E
J2
AV
AUX
(FRONT)
X08-
CN11
VIDEO
3/6
D56
I
R702
Lch
220
6
X08-
CN14
R701
3/6
Rch
220
200mV/47k
w w w
J
E4
.
CAUTION: For continued safety, replace safety critical components only with manufacturer's rec-
ommended parts (refer to parts list).
tion against risk of fire, replace only with same type and rating fuse(s). To reduce the risk of electric
7
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.
CY CZ
(X25-604X-XX) (A/7)
(X25-6133-00) (A/7)
-16.5V
PHONO EQ AMP
IC1
J1 (1/2)
-17V
R2 C4 R4
1K 10u50 100 5 4 C18 R10
10u50 1K
R1 + 7
+
R6 6
+
-
62K
C16
R14 R12
220P
270K 22K
C10 R8
+
100u10 360 C8 C6
+ 0.012 3300P
PHONO
C12
C9 C7 C5
100u10 R7 0.012 3300P 1000P
+
360
C15
220P R13 R11
+
270K 22K
R5
62K 2 C17 R9
R1 C3 - 1 10u50 1K
1K 10u50 R3 3
+
L2 +
C11
+
100 8
IC1 0.01
LINE: 200mV 16.3V
(2/2)
CN21
FRONT Rch 15
FRONT Lch 14
T2IN-Lch 13
T2IN-Rch 12
A-Lch 11
A-Rch 10
B-Rch 9
B-Lch 8
V1REC-Lch 7 6
V1REC-Rch 6 5
V2REC-Rch 5 4
V2REC-Lch 4 3
GND 3
-17V 2 -17V
+17V 1 +17V +17V
CN22
+17V 1 +17V
-17V 2 -17V
IC23
V2REC-Lch 3 3
(BOTTOM
V2REC-Rch 4 4
VIEW)
VIREC-Rch 5 5
V1REC-Lch 6 6
GND 7
B-Lch 8
C227
100P
B-Rch 9
GND 10
A-Rch 11
A-Lch 12
GND 13
PRE Rch IN 14
PRE Lch IN 15
PRE Lch OUT 16
PRE Rch OUT 17
GND 18
NC 19
NC 20
CN28
GND 1
CLK 2
DAT 3
ST2 4
+5V
1 2 3 4 5 6 7 8 9 4 3 2 1
CN32 CN26
x a o
y
WH2 E
i
indicates safety critical components. For continued protec-
DA DB
8
R18 10
-17V
1/4W
V
ROOM B
PRE OUT(R)
C203
3.3u50 R219
+
1K
ON:0.7V ON:0.7V
OFF:-16.0V OFF:-16.0V
R217
1K
Q3 Q1
Q4 Q2
R218
1K
OFF:-16.0V OFF:-16.0V
ON:0.7V ON:0.7V
C204
3.3u50 R220
+
1K
ROOM B
PRE OUT(L)
-17V -17V -17V
+17V +17V +17V
16.3V
C205
0.01
IC21
16.3V (1/4)
5 4 R211 C209
3.3K 47u25
+ 7
6
+
-
L
ROOM A
BUFFER
Q Q
3 7 6 3
R
IC21
(2/4)
9 R212 C210
-16.5V
- 8 3.3K 47u25
10
+
+
11
+
-17V
-16.5V
INPUT ATT.SEL.
(ROOM B CANCELS PHONO)
5.6V AVR
IC83
OUT IN
+5V +5V +5V
GND
5.6V
+
T
+
-5.6V
GND
5V 5V
OUT IN
R703 -5.6V AVR
IC82
4.7K
13 12 11 10 9 8 7 6 5 4 3 2 1
CN25
u 1 6 3
D
.
DC DD
M N
2 4
9 9 8
CN23 CN24
9 8 7 6 5 4 3 2 1 1 2 3 4 5 6 7 8 9 10
O
W53
C217
R207 3.3u50 W52 W92
+
1K
W48 W96
R209
1K
W47 W94
B-MUTE
(ROOM B
R210 PRE OUT)
1K
C218
R208 3.3u50 W50 W90
+
1K
-17V -17V
+17V
Q32
R416
3.3K
IC21
(3/4)
3
+ 1
2
-
1 5 1 5 0 8 9 2 4
13
- 14
12
+
IC21
(4/4)
INPUT ATT
+10V +10V
10.2V
-10.1V
10V 10V
m
E5
c o
J
The DC voltage is an actual reading measured with a high
impedance type voltmeter with no signal input. The mea-
surement value may vary depending on the measuring
instruments used or on the product.
DE DF
2
9 9
CN29
11 12 13 14 15 16 17 18 1 2
W122
W118
B PRE OUT(R)
B PRE OUT(L)
ON:0.7V ON:0.7V
OFF:-16.0 OFF:-16.0
Q6 Q5
C207 820P C208 820P
Q5,6
K1 B-MUTE
W146
W115
-17V
+17V
D57
R462
C455 1000P 1K
1/4W
N
9 8 2 9 9
+17V
+31V
+8V +8V
+
Q86 10V AVR
+
+10V
21.8V
C828
10.2V
100u16
+
10.9V
R821
D89 2.7K
1/4W
+10V
+17V
+
10V -10V
-17V
-10V
AVR
-10.0V
Q85
-10.7V
+
D39
P2
E2 -17V
+31V
I