Kenwood KSC-900CTR Service Manual
ACTIVE CENTER SPEAKER
K SC-900CTR
7
Q
Q
TEL 13942296513 QQ 376315150 892498299
3
SERVICE MANUAL
6
3
1
5
1
5
0
8
4
2
9
C
2000-12 PRINTED IN JAPAN
B51-7709-00 (4) 3397
9
8
2
9
9
TEL 13942296513 QQ 376315150 892498299
TEL
AMPLIFIER
(W03-5036-08)
13942296513
DC CORD ASSY
(E30-5923-08)
6
7
3
Q
Q
CORD WITH PINJACK
(E30-5904-08)
3
1
PLASTIC CABINET ASSY
(A02-2556-08) (W) (M)
0
5
1
5
BRACKET
(J19-4158-08)
9
2
8
9
4
2
9
8
CORD WITH CONNECTOR
(E30-5905-08)
9
w
w
BRACKET
(J19-4159-08)
w
.
xia
o
y
u
SCREW SET
(N99-2127-08)
1
6
3
.
c
o
m
KSC-900CTR
BLOCK /SCHEMATIC DIAGRAM
Q
Q
3
7
INPUT
6
3
IC2
1
5
AMP
Q2-5
BIAS
REGULATED
POWER SUPPLY SECTION
H.P.F
1
400Hz -12dB/oct
STND-BY
CONTROL
5
0
VOLUME
VCC
TEL 13942296513 QQ 376315150 892498299
LED
B CA D E
PJ1 IC2 IC2
1
1
2
CN3
TEL
2
3
CN2
121
2
C124
3300P
13942296513
D804
R810
R811
15K
C808
1000P
D802
C805
47u16
C806
100u16
82
Q6
22K
R101
1.8K
R102
+
+
Q5
C101
1u50
1u50
R805
68K
R809
C807
0.01
D803
R104
+
R106C105
+
R803
1K
R812 3.3K
R804 3.3K
560
R806
R807
3.3K
22K
22K
33K
R808
Q2
Q3
Q4
1.5K
D801
10K
R103
47K
R801
L801
F801
3
2
C103 100P
R107 10K
56K
R802
C804
47u16
3A
+
C801
10u35
1
+
R113
C116
R115
10K
10u35
27K
R120
47K
C106
8200P
R110
56K
+
C117
R116
22K
100P
IC1
4
6
5
C107
8200P
R108
56K
Q
IN
GND
H.P.F.
Q
C110
47u16
9
1
33K
R125
5
6
R111 68
+
FIL
SBY
C119
100u16
8
ATT
Q6
REMOTE
CONTROL
8
7
4
6
7
3
+
C111
100u16
7
10
POWER AMP
3
2
+
C123
1u50
+
3
NC
IC1
17
8
POWER
AMP
9
VR1
20K
1K
R109
5
1
R112 5.6K
0.1
C113
GND
GND
NC
4
2
SPEAKER
OUT 4
BATT
REM
IC1 : TA8225H
IC2 : NJM4558L
Q2,3,5,6 : 2SC2785
+
Q4 : 2SB1237
1u50
C104
D801 RM10Z:
D802 : MTZJ10B
D803 : MTZJ6.8B
D804 : SEL4114R
0
5
1
+
C114
1000u16
C112
220u10
12
+
11
13
R122
14
C122
16
C120
220u10
15
+
R124
R123
1
0.1
5.6K
68
9
8
C118
C121 R121
9
1000P
0.1 1
8
2
4
2
9
SIGNAL LINE
B LINE
2
8
9
CN1
SP+
1
SP-
2
3
BATT
4
GND
5
REM
6
9
9
TEL 13942296513 QQ 376315150 892498299
9
4
w
w
w
5
2
CAUTION: For continued safety, replace safety critical components only
with manufacturer's recommended parts (refor to parts list).
Indicates safety critical components. To reduce the risk of electric shock,
leakagecurrent or resistance measurements shall be carried out (exposed
parts are acceptably insulated from the supply circuit) before the appliance
is returned to tha customer.
.
xia
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1
6
3
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c
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