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Kenwood kac-8403 Service Manual

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POWER AMPLIFIER
KAC-8403

SERVICE MANUAL

BOOST
CONTROL SYSTEM
Fuse (40A)
(F52-0016-05)
Accessories
(W01-1606-05) x3
4/3/2 Channel
Power Amplifier
Screw set
(N99-1794-05)
© 2006-11 PRINTED IN JAPAN
B53-0469-00 ( N ) 957
Connecting cord assy
(E30-6144-05)
19cm
This product uses Lead Free solder.
RoHS
This product complies with the
Dressing Panel
(A21-6561-02): (K type)
(A21-6562-02): (E,M type)
E,M type
K type
directive for the European market.

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  Summary of Contents for Kenwood kac-8403

  • Page 1: Service Manual

    POWER AMPLIFIER KAC-8403 SERVICE MANUAL © 2006-11 PRINTED IN JAPAN B53-0469-00 ( N ) 957 Dressing Panel (A21-6561-02): (K type) (A21-6562-02): (E,M type) 4/3/2 Channel BOOST E,M type Power Amplifier CONTROL SYSTEM K type Fuse (40A) (F52-0016-05) Screw set Connecting cord assy...
  • Page 2: Block Diagram

    KAC-8403 BLOCK DIAGRAM INPUT SENS Q201-225 IC5 (X08) Q241,242 ISOLATION SPEAKER 12dB MUTE POWER AMP AMPLIFIER OUTPUT LINE IN FREQ HPF/OFF IC1 (X08) ISOLATION 12dB SPEAKER POWER AMP MUTE AMPLIFIER OUTPUT INVERT ST/MONO INPUT SENS IC4 (X08) Q401-426 Q443,444 IC7,8 (X08)
  • Page 3: Components Description

    KAC-8403 COMPONENTS DESCRIPTION PREAMPLIFIER UNIT (X08-4200-12) Ref. No. Application / Function Ref. No. Application / Function Q221 For ACH voltage amplifying step differential amplifying IC1 (2/2) ARch reversal buffer Q222,223 For ACH final current amplifying IC1 (1/2) BRch reversal buffer...
  • Page 4: Pc Board (Foil Side View)

    KAC-8403 PC BOARD (FOIL SIDE VIEW) BLch 2.5mV ARch 2.5mV AUDIO UNIT X09-5840-12 A/2 DC voltmeter DC voltmeter (J76-0074-21) Q623 W277 W244 W573 W296 W245 W275 W519 W520 W548 W572 W524 W318 TH602 W521 W525 R258 W516 R445 R260 W562...
  • Page 5 KAC-8403 ALch 2.5mV X09 B/2 DC voltmeter D600 W140 W133 W515 R251 R257 Q225 Q223 Q211 W149 W135 X09-5840-12 W158 W130 R641 Ref. No. Address Ref. No. Address W142 R247 R245 W120 Q407 W127 W167 W153 Q408 W121 Q409 Q410...
  • Page 6 KAC-8403 PC BOARD (FOIL SIDE VIEW) PREAMPLIFIER UNIT X08-4200-12 (J76-0070-12) TP179 TP177 FAN+B +15V TP176 A-ISO-GND-1 A-ISO GND-2 B-ISO-GND-2 TP180 LOGO-LED B-ISO-GND-1 R601 TP175 TP187 AMP-AL ISO-AL AMP-AR W131 MONO R224 C229 200mV W124 C210 W130 R243 R244 R216 R220...
  • Page 7 KAC-8403 (X09-5840-xx) (A/2) +15V +15V 15.6V D101 TP23 TP63 C103 (2/4) TP66 (1/4) R109 R101 10u50 R170 C115 10u50 POWER C217 R107 R125 TP64 Q201 Q203 R201 C201 TP69 TP65 R111 C131 100P 10u50 C100 TP68 1000P TP24 R100 TP74...
  • Page 8 KAC-8403 2SD2012-F Q214,221,421,422 2SA817A-F RM4ZLF-J 2SB1375-F Q220,223,423,424 2SC4468NF D3,4 02DZ16F-Y Q3,6 2SK3662-F Q222,225,425,426 2SA1695NF FCH10A20 +15V ∗ Q4,5,7,8 Q241,242,280,282,443,444, FRH10A20 Q9,12 2SC4097 481,482,602,605,606,610-613, D7-9,152,203-206,251,260,261,403- R251 R233 35.5V Q10,11 2SA1577 616,618 2SC4081 458,462,463,601-603,605,609,610 Q13,14,619 DTA114EUA Q603,614,615,617 2SA1576A 1SS133 Q219 R241 Q201-204,209,210,217,218,...
  • Page 9 DRV. TP14 -15V -15V TP15 • DC voltages are as measured with a high imped- TP16 ance voltmeter. Values may vary slightly due to LOGO-LED TP17 variations between individual instruments or/and D-GND units. -15V KAC-8403 (1/2) X09-5840-12 A/2 (3/3)
  • Page 10 KAC-8403 (X08-4200-1x) SIGNAL LINE +15V ∗ 15.0V GND LINE TP265 (2/2) B LINE LPF, G10DB 18dB/oct, F=-VRcont B LINE B-CH R205 4.3K (X08-4200-xx) UNIT IC1,4-8 MODEL NAME TP269 KAC-8452(J/K/M/E) 0-10 RC4580IDR ST/MONO KAC-8402(K) 0-11 RC4580IDR ∗ 15.0V KAC-8403(J/K/M/E) 0-12 BA4560RF (2/2) ∗...
  • Page 11 R130 C112 TP255 10u50 tomer. -15.0V C124 PHASE INVERTER 150P • DC voltages are as measured with a high -15V impedance voltmeter. Values may vary +15V slightly due to variations between indi- vidual instruments or/and units. KAC-8403 (2/2) X08-4200-12 (2/2)
  • Page 12: Exploded View

    KAC-8403 EXPLODED VIEW M6x10 : N07-0003-08 M4x9 : N09-4214-08 φ3x12 : N09-6216-05 M4x8 : N09-6287-15 φ3x10 : N80-3010-43 φ2x6 : N82-2006-48 φ3x8 : N89-3008-48 φ3x16 : N89-3016-48 φ3x14 : N09-6217-05 φ3x6 : N83-3006-43 φ3x8 : N89-3008-43 φ3x6 : N89-3006-43 (X09-)
  • Page 13: Parts List

    J 1/4W C221-224 CK73GB1H103K CHIP C 0.010UF K R604 RK73GB2A9R1J CHIP R J 1/10W C225,226 CC73GCH1H101J CHIP C 100PF R31-0246-05 VARIABLE RESISTOR 10K E1 : KAC-8403 (Europe) K : KAC-8403 (North America) M1 : KAC-8403 (Other Areas) Indicates safety critical components.
  • Page 14 50WV C600 CK73GB1H103K CHIP C 0.010UF K C601 CD04BJ1V330M ELECTRO 33UF 35WV C105,106 CC73GCH1H150J CHIP C 15PF C602,603 CD04BJ1H100M ELECTRO 10UF 50WV E1 : KAC-8403 (Europe) K : KAC-8403 (North America) M1 : KAC-8403 (Other Areas) Indicates safety critical components.
  • Page 15 R171 RD14BB2C8R2J J 1/6W R416-418 RK73FB2B151J CHIP R J 1/8W R172 RK73GB2A102J CHIP R 1.0K J 1/10W R419,420 RD14BB2C432J 4.3K J 1/6W E1 : KAC-8403 (Europe) K : KAC-8403 (North America) M1 : KAC-8403 (Other Areas) Indicates safety critical components.
  • Page 16 J 1/10W D107 UMZ6.8N ZENER DIODE R635 RK73GB2A622J CHIP R 6.2K J 1/10W R636 RK73GB2A222J CHIP R 2.2K J 1/10W D152 1SS133 DIODE E1 : KAC-8403 (Europe) K : KAC-8403 (North America) M1 : KAC-8403 (Other Areas) Indicates safety critical components.
  • Page 17 TRANSISTOR Q213 2SC3419(Y)-F TRANSISTOR Q214 2SA817A-F TRANSISTOR Q215,216 2SC1845-A(F,E) TRANSISTOR Q217,218 2SA992-A(F,E) TRANSISTOR Q219 2SC1627A-F TRANSISTOR Q220 2SC4468NF TRANSISTOR Q221 2SA817A-F TRANSISTOR E1 : KAC-8403 (Europe) K : KAC-8403 (North America) M1 : KAC-8403 (Other Areas) Indicates safety critical components.
  • Page 18: Specifications

    Weight ............. 4.1kg (9.0 lbs) Frequency Response (+0, -3dB) ......5Hz~50kHz Sensitivity (rated output) MAX ................0.2V KENWOOD follows a policy of continuous advancements MIN ................5.0V in development. For this reason specifications may be Input Impedance ............10kΩ changed without notice.

This manual is also suitable for:

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