Kenwood KAC-8404 Service Manual
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Kenwood KAC-8404 Service Manual

Kenwood KAC-8404 Service Manual

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See also: Training Manual , Instruction Manual
POWER AMPLIFIER
KAC-8404

SERVICE MANUAL

Fuse (40A)
(F52-0016-05)
FUSE[40A]
Accessories
(W01-1606-05)
4/3/2 Channel
4/3/2 Channel
P .CON
LEFT
RIGHT
LEFT
BRIDGED
POWER IN
SPEAKER OUTPUT
SPEAKER OUTPUT
Screw & wrench key set
(N99-1820-05)
This product complies with the
© 2007-11 PRINTED IN JA PAN
B53-0600-00 ( N ) 519
RIGHT
SP LEVEL INPUT
BRIDGED
SIGNAL SENSING
LINE IN
TURN-ON
Connecting cord assy
(E30-6144-05)
19cm
This product uses Lead Free solder.
RoHS
Dressing Panel
(A21-6635-02): (E,K type)
(A21-6636-02): (M type)
E,K type
M type
directive for the European market.

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Summary of Contents for Kenwood KAC-8404

  • Page 1: Service Manual

    POWER AMPLIFIER KAC-8404 SERVICE MANUAL © 2007-11 PRINTED IN JA PAN B53-0600-00 ( N ) 519 Dressing Panel (A21-6635-02): (E,K type) (A21-6636-02): (M type) E,K type 4/3/2 Channel M type 4/3/2 Channel Fuse (40A) (F52-0016-05) FUSE[40A] P .CON LEFT RIGHT...
  • Page 2 X09-874 X08-443 L..P.F / OFF/ H.P.F POWER AMP IC3,4 Q301,315 Q303 ST / SENS. MONO IC3,4 POWER AMP (INV) Q302,316 Q304 IC1,2 IC5,7 POWER AMP Q401,415 Q403 40Hz B.Boost SEL. SENS. +18dB IC1,2 IC5,7 POWER AMP ST / (INV) Q404 Q402,416 MONO Q709...

  • Page 3: Components Description

    KAC-8404 COMPONENTS DESCRIPTION ● PREAMPLIFIER UNIT (X08-4430-10) ● AUDIO UNIT (X09-8740-10) Ref. No. Application/Function Ref. No. Application/Function IC1-3 HPF, LPF IC1-4 Isolation circuit Reverse circuit DC-DC IC IC5,7 Bass Boost Q1,2 Switch IC6,8,9 HPF, LPF Q3-6 Gate driver IC10 Attenuator circuit...

  • Page 4: Pc Board (Foil Side View)

    KAC-8404 PC BOARD (FOIL SIDE VIEW) AUDIO UNIT X09-8740-10 (J76-0471-01) Q302 Q312 Q314 Q310 Q306 R302 Q308 C302 R322 R320 Q305 W242 W268 Q304 Q309 W239 W240 W271 W310 Q303 R309 W265 W264 W263 R332 W254 W270 R331 W259 R715...
  • Page 5 KAC-8404 X09-8740-10 Ref. No. Address C405 R407 CN44 W223 W230 R417 Q405 W226 Q409 R401 D401 R419 R415 Q403 Q301 Q407 Q302 R411 Q303 R422 Q304 R420 Q305 Q306 Q307 Q308 Q404 Q309 Q408 Q310 R412 W207 Q311 Q312 R404...
  • Page 6 KAC-8404 PC BOARD (FOIL SIDE VIEW) X08-4430-10 B/2 PREAMPLIFIER UNIT X08-4430-10 B/2 (J76-0468-02) Ref. No. Address IC10 Q301 Q302 Q303 Q304 Q305 Q306 Q307 W267 Q308 Q309 Q310 Q311 W119 Q312 W253 W256 W251 Q313 W257 W254 W100 Q314 W262...
  • Page 7 KAC-8404 PC BOARD (FOIL SIDE VIEW) PREAMPLIFIER UNIT X08-4430-10 A/2 (J76-0468-02) R207 R221 R223 R209 R226 R224 R232 C216 W204 W209 R210 R208 R231 C215 R212 R225 W902 C204 C221 C223 C211 R204 R206 C118 R120 R121 C224 R203 R205...
  • Page 8 KAC-8404 IC1-4 BA4560RF RM4ZLF-J4NF TL494IDR D2-4,301,302,401,402, 703,705-707,713 Q1,2 DTA114EUA Q307,308,407,408 1SS355 +15.0V Q3,4 2SC4097 2SC1627A-F D5,101,201,711,712 +15V Q5,6 2SA1577 Q309,310,409,410 LM1MA142WK-G Q7-10 STP60NF06FP 2SA817A-F FCH10A20 2SD2012-F Q311,312,411,412 FRH10A20 2SB1375-F 2SC4468NF D8,9 UDZS16B Q301,302,401,402 Q313,314,413,414 D102,202,303,304,403, 2SC3419(Y)-F 2SA1695NF LM1MA142WA-G Q303,304,403,404 Q701...
  • Page 9 Q404 R412 R721 2.2K Q412 TP720 R402 D709 R727 Q408 2.2K 6 7 8 9 10 11 12 1 2 3 6 7 8 CN44 KAC-8404 (1/2) SIGNAL LINE GND LINE B LINE X08-B/2- X08-B/2- B LINE X08-B/2- X09-8740-10 (2/2)
  • Page 10 KAC-8404 (X08-4430-10) (A/2) C109 0.01 TP103 TP105 R105 C111 R103 10K 10u35 TP101 R101 (2/2) TP119 TP117 C107 0.01 TP109 R119 IC1(1/2) FREQ- IC2(2/2) C113 TP107 UENCY 10u35 R107 C105 ST/MONO 2.2K 0.33 R113 16K TP113 TP115 R114 C116 C101 0.01...
  • Page 11 KAC-8404 (X08- ) (B/2) INPUT SENSITIVITY 103A +15V +15V TP121 TP315 R122 390 C305 TP117 C311 C901 C903 R338 C301 220P 220P Q305 Q307 10u50 R321 R123 390 TP122 Q303 R341 R301 R305 Q315 C116 Q301 0.01 TP301 TP305 R315...
  • Page 12 Q414 X09- TP719 D406 C418 C423 A-MUTE 100P 100P POP MUTE DTA114EUA DC OFFSET OVER CURRENT C416 PRTECTION OVER CURRENT R422 Q412 SW14V C412 R722 Q710 -33.6V C707 10u50 33.6V 11V AVR KAC-8404 (2/2) X09- X09- CN44 CN33 X08-4430-10 (3/3)

  • Page 13: Exploded View

    KAC-8404 EXPLODED VIEW φ2.6x12 : N09-6312-05 M4x8 : N09-6726-05 φ3x10 : N80-3010-43 φ3x12 : N83-3012-48 : N89-3006-43 φ3x6 φ3x8 : N89-3008-48 : N09-6447-05 φ3x10 M6 AU : N07-0003-08 M4 AU : N09-4214-08 Bundled to the Bundled to the transistor. transistor.

  • Page 14: Parts List

    0.047UF K R205,206 RK73GB2A242J CHIP R 2.4K J 1/10W C217-220 CK73GB1H103K CHIP C 0.010UF K R207-210 RK73GB2A103J CHIP R J 1/10W E1 : KAC-8404 (Europe) K : KAC-8404 (North America) M1 : KAC-8404 (Other Areas) Indicates safety critical com po nents.
  • Page 15 CHIP R 0 OHM J 1/16W R704,705 RK73GB2A123J CHIP R J 1/10W W261 R92-2053-05 CHIP R 0 OHM J 1/8W E1 : KAC-8404 (Europe) K : KAC-8404 (North America) M1 : KAC-8404 (Other Areas) Indicates safety critical com po nents.
  • Page 16 CHIP R 1.0K J 1/10W CK73GB1H103K CHIP C 0.010UF K RK73GB2A103J CHIP R J 1/10W RK73GB2A223J CHIP R J 1/10W E1 : KAC-8404 (Europe) K : KAC-8404 (North America) M1 : KAC-8404 (Other Areas) Indicates safety critical com po nents.
  • Page 17 CHIP R 0 OHM J 1/16W R707 RK73GB2A682J CHIP R 6.8K J 1/10W W294-296 R92-2053-05 CHIP R 0 OHM J 1/8W E1 : KAC-8404 (Europe) K : KAC-8404 (North America) M1 : KAC-8404 (Other Areas) Indicates safety critical com po nents.
  • Page 18 2SC4468NF TRANSISTOR Q413,414 2SA1695NF TRANSISTOR Q701 2SB1241 TRANSISTOR Q702-704 2SC4081 TRANSISTOR Q705 2SA1576A(R,S) TRANSISTOR Q706 2SC4081 TRANSISTOR Q707 2SA1576A(R,S) TRANSISTOR E1 : KAC-8404 (Europe) K : KAC-8404 (North America) M1 : KAC-8404 (Other Areas) Indicates safety critical com po nents.
  • Page 19 KAC-8404 PARTS LIST CAPACITORS 2 2 0 • Capacitor value CC45 Color* 010 = 1pF 0 = 22pF 1 = Type ... ceramic, electrolytic, etc. 4 = Voltage rating 100 = 10pF 2 = Shape ... round, square, etc. 5 = Value...

  • Page 20: Specifications

    High Pass Filter Frequency (-12 dB/oct.) Weight ................2.8 kg ............50 – 200 Hz (variable) Bass Boost Circuit (40 Hz) (B channel) ....0/ +18 dB KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be General changed without notice.

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