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ACTIVE CENTER SPEAKER
KSC-900CTR
SERVICE MANUAL
C 2000-12 PRINTED IN JAPAN B51-7709-00 (4) 3397
AMPLIFIER (W03-5036-08)
PLASTIC CABINET ASSY (A02-2556-08) (W) (M)
DC CORD ASSY (E30-5923-08)
CORD WITH PINJACK (E30-5904-08)
CORD WITH CONNECTOR (E30-5905-08)
BRACKET (J19-4158-08)
BRACKET (J19-4159-08)
SCREW SET (N99-2127-08)
KSC-900CTR
BLOCK /SCHEMATIC DIAGRAM
INPUT IC2 AMP H.P.F
400Hz -12dB/oct VOLUME
POWER AMP ATT IC1
SPEAKER OUT 4
Q2-5
STND-BY CONTROL BIAS REGULATED VCC BATT
Q6 REMOTE CONTROL
REM
POWER SUPPLY SECTION LED
A
B
C
D
E
PJ1
CN2
1 2 1 R101 22K 2
1
2
1
C101 1u50 +
R104 22K R103 10K
IC2
3 2 1 C103 100P R107 10K C801 10u35 + R801 47K R802 56K R110 56K C106 8200P C107 8200P 5 6 R108 56K
IC2
8 4 7 C123 1u50 + R109 VR1 1K 20K
SIGNAL LINE B LINE IC1 IC2
C104 1u50 +
CN3
C124 3300P
: TA8225H : NJM4558L
R102 1.8K
C105 1u50 +
R106 22K
Q2,3,5,6 : 2SC2785 Q4 : 2SB1237 D801 D802 D803 D804 : : : : RM10Z MTZJ10B MTZJ6.8B SEL4114R
H.P.F.
D802
Q2
R803 1K R812 3.3K R804 3.3K
C804 47u16 +
R111 68 R113 10K C111 100u16 + C110 47u16 +
R112 5.6K C114 1000u16 + C112 12 220u10 + 11 13 14 C122 R122 0.1 1
2
C116 10u35 +
10
D804
R115 27K
C117 100P
C806 R805 100u16 560 + R810 Q5 82 R806 33K R809 68K
FIL
17
9
7
IC1
C113 0.1
C805 47u16 +
CN1
1 SP+ C118 1000P
4 IN GND
Q3 Q4
R808 1.5K L801 R120 47K R116 22K 6 5 GND SBY
POWER AMP
GND
R811 15K C808 1000P
C807 0.01
NC
NC
R124 5.6K
C120 15 220u10 +
C121 R121 0.1 1
3
Q6
R807 3.3K
16
2 SP3 4 BATT 5 GND 6 REM
3
2
C119 100u16 +
R125 33K
8
D803 D801
1
F801
4
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.
5
2
3A
R123 68
KSC-900CTR
EXPLODED VIEW/PARTS LIST
A B
A A
PLASTIC CABINET (A02-2547-08)
1
DC CORD ASSY (E30-5923-08) CORD WITH PINJACK (E30-5904-08)
A
A
PLASTIC CABINET ASSY (A02-2556-08) (W) (M) BRACKET (J19-4159-08) CORD WITH CONNECTOR (E30-5905-08) BRACKET (J19-4158-08)
B B B
B
SCREW SET (N99-2127-08) A B C D E F G H J 3x10 (BLK) 3x8 (BLK) 2x8 (BLK) 3x8 3x12 3x6 (BLK) WASHER WASHER WASHER : N82-3010-45 : N50-3008-45 : N82-2008-45 : N09-3762-08 : N09-3763-08 : N50-3006-45 : N16-0030-46 : N15-1030-08 : N19-0458-08 CASE (A02-2557-08)
B B F
2
IC (TA8225H)
B F
B
WARRANTY CARD INSTRUCTION MANUAL ITEM CARTON CASE (M) ITEM CARTON CASE (W) POLYSTYRENE FIXTURE
: B46-0100-50 : B61-1090-00 : H51-1626-08 : H51-1627-08 : H10-8195-08 CASE (A02-2558-08)
3
B
C C
AMPLIFIER (W03-5036-08)
FUSE
3A
Parts with the exploded numbers larger than 700 are not supplied.
3
KSC-900CTR
SPECIFICATIONS
[AMPLIFIER] Audio
Max. Power Output .................................................................................................................................. 35W Rated Power Output ................................................................................................................................ 20W Frequency Response ........................................................................................................... 400 ~ 50,000Hz Signal to Noise Ratio .............................................................................................................................. 85dB Total Harmonic Distortion .................................................................................................................. 0.15% Sensitivity ................................................................................................ Vol Max. 200mV / Vol Min. 5000mV
Power Supply
Operating Voltage (-GND) ..................................................................................................................... 14.4V Current Consumption (Max.) ................................................................................................................... 2.4A
[SPEAKER] Electrical
Nominal Impedance .................................................................................................................................... 4 Power Handling Peak Input Power .............................................................................................................................. 60W Maximum Input Power ....................................................................................................................... 35W Rated Input Power ............................................................................................................................. 20W Frequency Response ............................................................................................................ 300 ~ 70,000Hz
Design
System .................................................................................................................................. 2Way 2Speaker Enclosure ............................................................................................................................................. Sealed Mounted Speaker [mm] [in.] MATERIAL
Woofer Diaphragm Surround Magnet Diaphragm Magnet 70×40 15 - t4×2 16 15 - t2 3×1.6 Pulp Cone (Black) Cloth Neodymium Hypernyl Dome Type (Gray) Neodymium
Tweeter
3/4
Dimension
Width Height Depth
SP [mm]
140 46.3 118.5 (with bracket) 180g (with bracket) 1.3kg 11g
AMP [mm]
156 40 77 362g
Weight
Net Weight (PC.) Gross Weight Weight of Magnet
5.5×2 (wo) 2.75g (tw)
KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice.
KENWOOD CORPORATION
14-6, Dogenzaka 1-chome, Shibuya-ku, Tokyo, 150-8501 Japan