Kenwood KRF-V7771D Service Manual page 31

CC CD
Q Q
3 7 6 3 1 5 1 5 0
(X11-3800-XX) (A/7)
1
(X11-3813-00) (A/7)
X11-C/7
-CN5
1/6
A
E1
1
VOL IN SR
2
GND
3
VOL IN SL
X08-
4
CN12
GND
5
VOL IN SW
2 3/6
6
S-MUTE 6
7
VOL IN C
G 8
GND +17V
9
VOL IN R
10 16.3V
GND C531 R533
11 47u16 3.9K
6 8
VOL IN L
-
+
12 5
SW-MUTE 12 +
7
13
20dB ATT 13 IC49
14 (1/2)
A-MUTE 14
15
B-MUTE 15
BUFFER
3
IC49
(2/2)
3
C532 R534
+ 1
47u16 3.9K
2
-
+
4
-16.5V
T E
L 1 3 9 4 2 2 9 6 5 1 3
4
J2
R2
Rch 1 1
220
REC OUT
R1
Lch 2 2
220
CD2/TAPE2
R6
Rch 3 3
1K
PLAY IN
R5
Lch 4 4
1K
5
J1
+
R10
Rch 1
5
220 ON:15.4V
OFF:-15.9V
REC OUT
R9
Lch 2 6
220
MD/TAPE
R14
Rch 3 7
1K
PLAY IN
R13
Lch 4
1K
R18
Rch 5 8
6
1K
CD1
R17
Lch 6 9
1K
w w w
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
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.
7
CE CF
E2
IC42
SELECTOR
(DIRECT DAC
LOW BOOST)
(BYPASS TONE)
+17V
R542
3K
16.3V
Rch
IC42
R537
C325
100
0.01
L
R
-16.5V
R538
100
Lch
R541 3K
(
25 )
17V 17V 17V
+17V +17V
C512 0.1
C514 0.1
C516 0.022
R510 10K R512
R508 10K R507
10K 6 10K
- 7
R502 R504 5 R501 R503
+
33K 18K IC48 33K 18K
16.3V
(2/2)
R506 8 R505 8
2 6
LOW
- 1 -
33K 33K
3 BOOST(L) 5
+ +
4 4
IC48 IC47
(1/2) (1/2)
-16.5V
17V
A-MUTE S-MUTE SW-MUTE -20dB ATT
DRIVE DRIVE DRIVE DRIVE
+17V +17V
Q15 Q23 Q19
+ + +
ON:15.4V ON:15.4V
OFF:-15.9V OFF:-15.9V
ON:15.4V
OFF:-15.9V
C350
2.5V 0.1u50
ON:1.8V ON:1.8V ON:1.8V
Q16 OFF:4.9V Q24 OFF:4.9V Q20 OFF:4.9V
17V 17V
x a o
y
i
indicates safety critical components. For continued protec-
CG CH
8
CN3
9 8 7 6 5 4 3 2 1
15
14
13
+17V
17V
R544
3.9K
R348 470K
R347 470K
R346 470K
C339 100P
17V
( 2 )
+17V
Q Q
C511 0.1 R511
3 7 6 3
10K
C513 0.1 ( 6 )
C515 0.022
R509 10K
2
- 1
3
+
IC47
(2/2)
16.3V
LOW
7
BOOST(R) ( 4 )
C521 ( 9 )
0.01
-16.5V
17V
15.5V B-MUTE
DRIVE
D13
+17V
Q17
+
Q21
ON:15.4V
OFF:-15.9V
(
25
(
+
Q18
ON:1.8V
Q22 OFF:4.9V
ON:1.8V
OFF:4.9V
17V
u 1 6 3
.
CI CJ
2 4
9 9 8
INPUT SEL.
IC2 Lch
14 15
GND CLK
13 16
ST DATA
12 17
IN
11 T2 18
7
( 1 )
REC
1 5 1 5 0 8 9 2 4
10 CD2/T2 19
4
( 5 )
REC
9 AV AUX T2 PLAY 20
8 21
IN
7 22
OUT
A ROOM B
6 23
OUT
5 24
T2
( 3 )
PLAY
4 25
SL
3 26
T1
PLAY ( 7 )
2 27
CD1
( 8 )
1 28
VSS VDD
-16.5V 16.3V
)
4 )
C16
C14 C13 150P
+17V
150P 0.01
17V 17V
m
c o
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.
CK CL
2
9 9
INPUT SEL.
IC1 Rch
14 15
GND CLK
13 16
STB DATA
12 17
IN
11 18
T2
6
REC
9 8 2 9 9
10 19
CD2/T2
5
REC
9 20
AV AUX T2 PLAY
8 21
IN
7 22
OUT
A ROOM B
6 23
OUT
5 24
T2
PLAY
4 25
SR
3 26
T2 +17V
PLAY 16.3V
2 27
IC3
CD
(1/2)
C25 8 3
47u25 1 +
1 28
2
VSS VDD +
-
R27
100
-16.5V 16.3V
REC OUT
BUFF
R28
100
C26 6
47u25 7 -
5
+ +
IC3
C17 4
(2/2)
0.01
-16.5V
17V 17V