Kenwood DM-3090 Service Manual page 37

U
R1827
Q1821
270
Q1822
+B
+B
+B
5ch MOTOR DRIVER
1.2V 1 REG+
3.7V 2
REGB
1.25V
1.6V 3 IN1+
4 VBS1
+B
5 Vm1
1.6V 6 IN1-
1.6V 7 OUT1
8 VM1-
9
VM1+
10 GND
11 GND
2.4V 12 VM2+
2.6V 13 VM2-
1.6V 14 OUT2
1.6V 15
IN2-
1.6V 16 IN2+
3.1V 17
MUTE1
18
MUTE2
19
SS.GND
VREF
1.6V 20
C1631
21 VREFO
1
1.6V
V
J1730 0 R1733 1K
R1758 1K
R1759 1K
R1953 47
( 74 )
R1951 0 R1994
( 71 )
47
R1952 47
( 70 )
R1940 220
( 12
)
J1950 LR190
0 22
( 72 )
Q1801
+B
+
( 34
)
Q1803 Q1802
( 35 )
R1463
10K
( 36 )
R1461
10K
( 21 )
R1459
10K
( 37 )
( 5
)
C1425
0.047
( 12
)
Q1451
( 6
)
R1947
+B
47
( 1 )
+B
+B
R1620
CH3IN 42 1.7V
0
OUT3 41 1.7V 5.1V
IN3- 40 1.6V
VBS2 39
Vm2 38
+B
IN3 37 1.6V
36
NC
VM3- 35 2.1V
35
34 2.9V
VM3+
34
33
GND
32
GND
VM4+ 31 2.6V
31
VM4- 30 2.5V
30
VM5+ 29 2.6V
29
VM5- 28 2.5V
28
OUT5 27 1.6V
IN5- 26 1.6V
25
IN5+ 1.6V
R1667
IN4+ 24 1.2V
22K
23 R1666
IN4- 1.2V
22K
R1668
OUT4 22
6.8K
1.6V
W
MAIN
-CNW301
2/2
CN1902
24 MUTE
23 DFSO
22 DFSI
21 DADATA
20 BCLK
19 LRCLK
R1995 0
18 ADDATA
17 SYSCLK
J1720
0
16 DVDD
L1950
15 DVDD
1uH
14 D.GND
MAIN
-CNP471
13 D.GND
12 D.GND
2/2
11 D.GND
R1466
10 DSTB
220
R1464
9 MODATA
220
R1462
8 KDATA
6.8K
R1460
7 SERCH
6.8K
R1458
6 DSCK
6.8K
R1454
5 MD-ST
1K
R1452
4 RESET
3.3K
R1456
3 LOAD SW
1K
+B 2 BUCKUP
R1939
1 PDOWN
1K
+
CAUTION: For continued safety, replace safe-
ty critical components only with manufacturer's
recommended parts (refer to parts list).
cates safety critical components. For contin-
ued protection against risk of fire, replace only
25
with same type and rating fuse(s). To reduce
the risk of electric shock, leakage-current or
24
resistance measurements shall be carried out
(exposed parts are acceptably insulated from
the supply circuit) before the appliance is
returned to the customer.
The DC voltage is an actual reading measured
with a high impedance type voltmeter. The
measurement value may vary depending on
the measuring instruments used or on the
product. Refer to the voltage during RECORD-
ABLE MD PLAY unless otherwise specified;
The value shown in ( ) is the voltage mea-
sured at the moment of STOP. The voltage
followed by (REC) refers to the value during
MD RECORDING.
23
22
27
28
Y22-7510-00
X Y
indi-
DM-3090