Kenwood KAC 649 S Service Manual

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KAC7649S(K)iut1p 01.4.27 4:14PM «Ks/7.

KAC-6498

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COMPONENT DESCRIPTION

AUDIO UNIT (X09-5420-10)

REF. No. FUNCTION OPERATION
01-4 MUTE Decreases shock noise in first moment when P.CON. turns on or off.
05-12 DIFFERENTIAL AMPLIFIER

Q13 RIPPLE FILTER

014-17 DIFFERENTIAL AMPLIFIER

018-21 TEMPERATURE COMPENSATION Detects temperature of the heat sink, and protects bias current driI't.
022-29 OVER-CURRENT PROTECTION Detects over-current, and limits the power stage current.

Q30-37 POWER AMPLIFIER DRIVER

038-45 POWER STAGE

Q46 P.CON. DETECTION

Detects P.CON-ON. and turns 047 on or off.

Q47 POWER SWITCH

Supplies power to l05.

Q48 MUTE ON/OFF

Turns Q49 on or off.

Q49 MUTE DRIVER

050,51 SWITCHING POWER STAGE

Q52 OVER-CURRENT PROTECTION

The detected over-current stops IC5'5 working.

Q53 OVER-VOLTAGE PROTECTION

When over-voltage puts on BATT, 053 turns P.CON. off.

IC3,4 (2/2) : INVERTER

054.55 CONSTANT VOLTAGE POWER SUPPLY Supplies + and - 15v power.
056,57 SWITCHING DRIVER
058-61 DIFFERENTIAL AMPLIFIER
IC1,2 INPUT BUFFER/ ISOLATION AMPLIFIER Makes a" '"pm s'gna'. 6 m°.'e dB 5'9"
and cancels automobile neise.
33,4 Ic3,4 (1/2) ; LPF

ICS SWITCHING REGULATOR

Oscillator for DC/DC converter.

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KAC7649S(K)iut1p 01.4.27 4:14 PM «3? 12

KAC-6498

SPECIFICATIONS

Audio Section
Rated Power Output (49)
A, B Channel (20-20KHZ, 0.08% THD)....
A, B Channel (DIN45324, +B=14.4V) ......
Rated Power Output (29)

A, B Channel (1 KHz, 0.8% THD) ....................
Bridged Power Output (49, 1KHz, 0.8% THD) ..
Max Power Output (49, Normal) ...........................

Max Power Output (49, Bridge) .....................
Low Pass Filter (A, B channel, 12dB/oct.) .....

High Pass Filter (A, B channel, 12dB/oct.) .............

Frequency Response (+0, -3dB)....
Signal to Noise Ratio .....................

Sensitivity (Max) (rated output) ..............................

Sensitivity (Min) (rated output)
Input Impedance ........................

General
Operating Voltage (11V-16V allowable) ......
Current Consumption (1KHz, 10% THD)....

Installation Size (Width x Height x Depth) ..............
Weight ....................................................................

..... 30WX4
..... 30Wx4

..... 40WX4
..... 80WX2

.............................................. 60WX4

..... 160W X 2
..... 80Hz

.............................................. 150Hz

..... 5H2 » 50KHz
..... 100dB

.............................................. 0.2V

..... 5.0V
..... 10KQ

..... 14.4V
..... 18A

.............................................. 261 mm x 57mm x 220mm
.............................................. 3.0Kg

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

KENWOOD SERVICE CORPORATION

P.O. Box 22745, 2201 East Dominguez Street,

Long Beach, CA90801-5745, U.S.A.

KENWOOD ELECTRONICS CANADA INC.
6070 Kestrel Road, Mississauga, Ontario, Canada L5T 188

KENWOOD ELECTRONICS LATIN AMERICA S.A.
P.O. Box 55-2791 Paitilla, Plaza Credicorp Bank Panama,
Piso 9, Oficina 901, Calle 50, Panama, Republic of Panama

KENWOOD ELECTRONICS BRASIL LTDA.

Av. Moema, 170-17, Andar-Cobertura ",B
Ed. Maximum Service Center, 04077-020 Moema,
Séo Paulo»SP-Brasil

KENWOOD ELECTRONICS UK LIMITED

Kenwood House, Dwight Road, Watford,
Herts, WD1 8EB, United Kingdom

KENWOOD ELECTRONICS DEUTSCHLAND GMBH

Rembrflcker Str. 15, 63150 Heusenstamm, Germany

KENWOOD ELECTRONICS FRANCE S.A.
13, Boulevard Ney, 75018 Paris, France

KENWOOD ELECTRONICS BELGIUM N.V.

Mechelsesteenweg 418, B-1930 Zaventem, Belgium

KENWOOD ELECTRONICS ITALIA S.p.A.
Via G. Sirtori 7/9, 20129 Milano, Italy

KENWOOD IBERICA S.A.

Bolivia, 239-08020 Barcelona, Spain

KENWOOD ELECTRONICS AUSTRALIA PTY. LTD.

(A.C.N. 001 499 074)
16 Giffnock Avenue, Centrecourt Estate, North Ryde,
N.S.W. 2113, Australia

KENWOOD ELECTRONICS (HONG KONG) LTD.

Unit 3712»3724, Level 37, Tower 1, Metroplaza,
223 Hing Fong Road, Kwai Fong, N.T., Hong Kong

KENWOOD ELECTRONICS GULF FZE
P.O.Box 61318, Jebel Ali, Dubai, U.A.E.

KENWOOD ELECTRONICS (THAILAND) CO., LTD.
2019 New Pechburi Road, Bangkapi, Huaykwang,

Bangkok, 10320 Thailand

KENWOOD ELECTRONICS SINGAPORE PTE LTD.
1 Genting Lane, #07-00, Kenwood Building, Singapore 349544

KENWOOD ELECTRONICS (MALAYSIA) SDN BHD

#4.01 Level 4, Wisma Academy Lot 4A, Jalan 19/1,
46300 Petaling Jaya, Selangor Darul Ehsan, Malaysia

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