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Kenwood KAC-6402 Service Manual
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Kenwood KAC-6402 Service Manual

Power amplifier
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See also: Instruction Manual
POWER AMPLIFIER
KAC-6402

SERVICE MANUAL

KAC-6402
(E type,M type)
KAC-6402
(K type)
Fuse
(F52-0014-05)
4/3/2channel
Powe Amplifie
MAXIMUMPOWER
© 2005-5 PRINTED IN JAPAN
B53-0285-00 ( N ) 1708
4/3/2channel
Power Amplifier
This product uses Lead Free solder.
Connecting cord assy
(E30-6144-05)
190mm
Accessory
(W01-1606-05)
Screw set
(N99-1587-05)

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Summary of Contents for Kenwood KAC-6402

  • Page 1: Service Manual

    POWER AMPLIFIER KAC-6402 SERVICE MANUAL © 2005-5 PRINTED IN JAPAN B53-0285-00 ( N ) 1708 KAC-6402 (E type,M type) 4/3/2channel Powe Amplifie MAXIMUMPOWER Connecting cord assy KAC-6402 (K type) (E30-6144-05) 4/3/2channel Power Amplifier 190mm Accessory (W01-1606-05) Fuse Screw set (F52-0014-05) (N99-1587-05) This product uses Lead Free solder.

  • Page 2: Block Diagram

    KAC-6402 BLOCK DIAGRAM LINE IN ISOLATION POWER SPEAKER AMPLIFIER LPF+6dB AMPLIFIER OUT AL INPUT FREQ. CONT. GAIN CONT. LINE IN ISOLATION POWER SPEAKER AMPLIFIER LPF+6dB AMPLIFIER OUT AR ST/MONO MUTE LINE IN ISOLATION POWER SPEAKER AMPLIFIER LPF+6dB AMPLIFIER OUT BL INPUT FREQ.
  • Page 3 KAC-6402 COMPONENTS DESCRIPTION Ref. No. Application / Function Operation / Condition / Compatibility Q613,614 DC output voltage detection Latch circuit at DC detection Q615,616 B-class step mute transistor Circuit for turning OFF input of power amplification step Q617,618 B-class step mute transistor...

  • Page 4: Pc Board (Foil Side View)

    KAC-6402 PC BOARD (FOIL SIDE VIEW) AUDIO UNIT X09-5890-10 (J76-0087-11) Q213 S D G W172 Q223 Q225 W123 R455 W173 W131 W113 W112 C421 R441 Q219 Q221 R449 R443 Q217 W403 W176 W601 W177 W382 W383 D206 W384 W110 W111...
  • Page 5 KAC-6402 C115 W344 R126 R124 R329 R313 Q214 C309 R307 R327 R324 R317 R309 C303 R311 R326 R454 R325 C301 Q225 Q224 Q226 W329 R456 R323 R301 C420 R123 R440 R442 D208 R310 R312 R302 R318 C312 C422 R125 R314...
  • Page 6 KAC-6402 (X09-5890-10) 25.0V 15.6V TP57 2.2K 3300u16 3300u16 2.2K -15.6V -25.0V TP60 R1 8.2K R2 8.2K TP358 TP359 LINE IN DC/DC CONVERTER 14.4V 15.0V 15.0V TP23 TP63 TP225 TP226 C103 R101 10u50 R105 TP65 TP66 R159 20K (2/2) R111 C111...
  • Page 7 KAC-6402 14.4V 14.4V +B SW TP62 Q604 Q603 MUTE R604 IC13 D603 2.4V IN1+ IN2+ D601 5.0V 5.0V IN1- IN2- 5.0V Q605 Q601 6.8K 5.0V FBACK OUTCTRL TP356 TP379 Q602 14.2V Q606 1000P 14.2V R24 16K 3.6V TP357 14.2V 10u50...
  • Page 8 KAC-6402 TP56 TP55 14.4V W601 R257 C223 10 1/2W 0.047 TP54 R457 C423 10u 25V 10 1/2W 0.047 BATT 2SB1375-F TP368 2SA817A-F R258 C224 2SD2012-F 10 1/2W 0.047 TP53 2SA992-A P CON TP49 2SC1627A-F TP45 2SC1845-A TP50 R458 C424 TP46 1/2W 0.047...

  • Page 9: Exploded View

    KAC-6402 EXPLODED VIEW φ4x8 : N09-6218-05 φ2.6x12 : N09-6312-05 φ3x10 : N80-3010-43 φ3x6 : N83-3006-43 φ3x8 : N89-3008-48 (X09-) (X09-5890) VR1 VR4 VR3 S2 S3 S5 S4 Bundled to the transister. (X09-) (X09-) Parts with the exploded numbers larger than 700 are not supplied.

  • Page 10: Parts List

    KAC-6402 PARTS LIST New parts Parts without Parts No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Ref. No. Parts No. Description Ref. No.
  • Page 11 KAC-6402 PARTS LIST AUDIO UNIT (X09-5890-10) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation C903,904 CC45FSL1H471J CERAMIC 470PF R205,206 RK73FB2B433J CHIP R J 1/8W C905,906 CC73GCH1H030C CHIP C 3.0PF R207,208 RK73FB2B822J CHIP R 8.2K...
  • Page 12 KAC-6402 PARTS LIST AUDIO UNIT (X09-5890-10) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R419,420 RK73FB2B101J CHIP R J 1/8W W309-311 R92-2053-05 CHIP R 0 OHM J 1/8W R421,422 RK73FB2B622J CHIP R 6.2K J 1/8W...
  • Page 13 KAC-6402 PARTS LIST AUDIO UNIT (X09-5890-10) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation D107-110 1SS355 DIODE Q617 2SA1576A(R,S) TRANSISTOR D111 LM1MA142WK-G DIODE Q618 2SC4081 TRANSISTOR D201 1SS355 DIODE NT732ATTD103J THERMISTOR D203,204 1SS355 DIODE...

  • Page 14: Specifications

    RMS Watts per channel @ 4Ω < 1% THD+N .............. 40W x 4 RMS Watts per channel @ 2Ω < 1% THD+N .............. 50W x 4 KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice.

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