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Kenwood KAC-9405 Service Manual

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POWER AMPLIFIER
KAC-8405
KAC-9405/9405M

SERVICE MANUAL

M type
Fuse (30A)
(F52-0045-05)
Screw & wrench key set
(N99-1820-05)
© 2009-12 PRINTED IN JA PAN
B53-0772-00 ( N ) 341
Connecting cord assy
(E30-6144-05)
19cm
This product uses Lead Free solder.
RoHS
This product complies with the
Dressing Panel
(A21-6752-01): (K type)
(A21-6753-01): (E type)
(A21-6782-01): (M type)
E,M type
directive for the European market.

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  Summary of Contents for Kenwood KAC-9405

  • Page 1: Service Manual

    POWER AMPLIFIER KAC-8405 KAC-9405/9405M SERVICE MANUAL © 2009-12 PRINTED IN JA PAN B53-0772-00 ( N ) 341 Dressing Panel (A21-6752-01): (K type) (A21-6753-01): (E type) (A21-6782-01): (M type) M type E,M type Fuse (30A) (F52-0045-05) Screw & wrench key set...
  • Page 2: Block Diagram

    KAC-8405 KAC-9405/9405M BLOCK DIAGRAM H.P.F Q501,503 POWER AMP CLIPPER IC1,2 Q505 ISO-AMP MUTE SENS. L.P.F SENS. L.P.F Q502, POWER AMP IC1,2 Q506 ISO-AMP MUTE (INV) CLIPPER MONO H.P.F IC12 H.P.F Q601,603 IC9,10 POWER AMP CLIPPER IC3,4 Q605 BASS ISO-AMP MUTE...
  • Page 3: Components Description

    KAC-8405 KAC-9405/9405M COMPONENTS DESCRIPTION ● AUDIO UNIT (X09-8940-10) Ref. No. Application / Function IC1~4 Isolation circuit Non-inverting circuit IC6~IC8,IC11~IC13 HPF, LPF IC9~IC10 Bass Boost circuit IC14 DC-DC IC IC15 ATT circuit Voltage supply Over voltage detection circuit P-CON Q4,Q7~Q9 Smoke and fi re prevention circuit...
  • Page 4 KAC-8405 KAC-9405/9405M PC BOARD (FOIL SIDE VIEW) X09 B/2 AUDIO UNIT X09-8940-10 A/2 (J76-0655-11) Q529 C524 Q532 IC10 C521 W200 C522 C528 W434 W201 R548 R568 Q520 W428 D515 W429 Q599 R560 R550 R573 R558 R554 C526 R538 W505 W423...
  • Page 5 KAC-8405 KAC-9405/9405M X09-8940-10 Ref. No. Address Ref. No. Address Q527 Q528 C524 R665 Q529 Q534 Q530 C528 R548 W387 W372 Q531 W364 W386 Q526 R560 Q532 R558 R657 C526 Q533 R556 W423 W402 Q534 R651 R643 W418 Q597 C619 W317...
  • Page 6 KAC-8405 KAC-9405/9405M (X09-8940-10) (A/2) TP210 IC2(1/2) TP103 R101 C103 15V AVR 10u50 R105 C117 R111 TP209 47u16 4.7K IC1(1/2) R117 10K R109 12K R113 TP102 C113 100P TP100 TP105 TP107 R114 TP101 C114 100P TP106 TP108 R110 12K TP202 R118 10K...
  • Page 7 KAC-8405 KAC-9405/9405M THERMAL DET 5V AVR Q711 TP38 R749 Q713 TP719 Q712 D706 DC/DC CONTROL D707 TP730 R752 Q714 6.8K IC14 DC/DC 7 : 3 R28 1K TP56 TP51 IN1+ IN2+ IN1- TP53 TP47 TP34 FBACK IN2- 2200u16 TP41 330K...
  • Page 8 KAC-8405 KAC-9405/9405M 29.0V POWER AMP R575 47K C529 6P R553 TP519 TP543 R563 Q527 Q515 TP541 Q507 Q511 R567 C513 R549 Q523 1.1K C511 TP503 TP901 R501 R509 C501 TP527 5.6K 5.6K 10u50 R569 C507 Q521 1.1K TP517 Q525 R517...
  • Page 9 KAC-8405 KAC-9405/9405M CAUTION : For continued safety, re place safe ty critical 26uH 14.4V com po nents only with manu- f a c t u re r ’s re c o m m e n d e d C902 parts (refer to parts list).
  • Page 10: Exploded View

    KAC-8405 KAC-9405/9405M EXPLODED VIEW : N09-6365-05 : N09-6726-05 : N80-3008-43 : N89-3008-48 : N89-3016-48 : N09-6447-05 : N09-4214-08 Bundled to the Bundled to the transistor. transistor. (X09-894) (A/2) Bundled to the transistor. (X09-894) (B/2) Parts with the exploded numbers larger than 700 are not supplied.
  • Page 11: Parts List

    CK73GB1H102K CHIP C 1000PF C107,108 CK73GB1H103K CHIP C 0.010UF K C623,624 CC73GCH1H060D CHIP C 6.0PF C625,626 CK73GB1H473K CHIP C 0.047UF K E1: KAC-8405 (Europe) K: KAC-8405 (North America) Indicates safety critical com po nents. M1: KAC-9405 M2: KAC-9405M (Other Areas)
  • Page 12 J 1/10W R427,428 RK73GB2A103J CHIP R J 1/10W R30 -32 RK73GB2A103J CHIP R J 1/10W R429,430 RK73GB2A163J CHIP R J 1/10W E1: KAC-8405 (Europe) K: KAC-8405 (North America) Indicates safety critical com po nents. M1: KAC-9405 M2: KAC-9405M (Other Areas)
  • Page 13 J 1/2W W322 RK73EB2E000J CHIP R J 1/4W W323 RK73GB2A000J CHIP R J 1/10W R701 RK73GB2A222J CHIP R 2.2K J 1/10W E1: KAC-8405 (Europe) K: KAC-8405 (North America) Indicates safety critical com po nents. M1: KAC-9405 M2: KAC-9405M (Other Areas)
  • Page 14 HSU119TRF-E DIODE W440-442 RK73EB2E000J CHIP R J 1/4W D203,204 RKZ6.8KG(B2) ZENER DIODE W443 RK73GB2A000J CHIP R J 1/10W D501,502 1SS302-F DIODE E1: KAC-8405 (Europe) K: KAC-8405 (North America) Indicates safety critical com po nents. M1: KAC-9405 M2: KAC-9405M (Other Areas)
  • Page 15 ✽ 2SC4154(F) TRANSISTOR Q613,614 ✽ ISA1602AM1(F) TRANSISTOR Q615,616 ✽ KTA1268-P TRANSISTOR Q619,620 2SC4081(S) TRANSISTOR Q621,622 ✽ 2SC4154(F) TRANSISTOR Q623,624 ✽ KTA1268-P TRANSISTOR E1: KAC-8405 (Europe) K: KAC-8405 (North America) Indicates safety critical com po nents. M1: KAC-9405 M2: KAC-9405M (Other Areas)
  • Page 16: Specifications

    Signal to Noise Ratio ............ 95 dB Input Impedance ............10 kΩ Low Pass Filter Frequency (-12 dB/oct.) KENWOOD follows a policy of continuous advancements ........... 50 Hz – 200 Hz (variable) in development. For this reason specifi cations may be changed without notice.
  • Page 17 KAC-8405 KAC-9405/9405M PC BOARD (FOIL SIDE VIEW) X09 B/2 AUDIO UNIT X09-8940-10 A/2 (J76-0655-11) Q529 C524 R665 Q532 Q534 IC10 C521 W200 C522 C528 W434 W201 R548 R568 W387 W372 W428 W364 D515 Q520 W386 Q526 W429 Q599 R560 R550...
  • Page 18 (X09-8940-10) (A/2) 26uH 29.0V 14.4V THERMAL DET POWER AMP TP210 IC2(1/2) R575 47K R101 C103 TP103 C902 15V AVR Q711 TP519 C529 6P R553 BATT 10u50 R105 R111 C117 0.01 TP209 47u16 TP543 4.7K Q527 R563 TP38 Q531 R749 Q713 IC1(1/2) Q515 TP541...

This manual is also suitable for:

Kac-8405Kac-9405m