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Kenwood KAC-6403 Service Manual

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POWER AMPLIFIER
KAC-6403

SERVICE MANUAL

Rear panel
(A84-0410-02)
Screw washer
(N09-4215-08)
A ch FILTER
B ch FILTER
OFF
HPF
OFF
LPF
1
2
2
0.5
3
3
0.3
4
4
MIN
5
0.2
MAX
MIN
Ach
INPUT SENSITIVITY
Screw washer
(N09-6393-08)
Fuse (25A)
(F52-0014-05)
INPUT SELECTOR
LINE IN
1
0.5
0.3
5
0.2
MAX
Bch
V
Panel
(A64-3834-02)
© 2006-1 PRINTED IN JAPAN
B53-0378-00 ( N ) 540
EXPLODED VIEW is on page 5.
Heat sink
(F01-3511-01)
Connecting cord assy
(E30-6144-05)
Screw set
(N99-1587-05)
Accessory
(W01-1606-05)
This product uses Lead Free solder.

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Summary of Contents for Kenwood KAC-6403

  • Page 1: Service Manual

    POWER AMPLIFIER KAC-6403 SERVICE MANUAL © 2006-1 PRINTED IN JAPAN B53-0378-00 ( N ) 540 Rear panel Screw washer EXPLODED VIEW is on page 5. (A84-0410-02) (N09-6393-08) Screw washer Fuse (25A) (N09-4215-08) (F52-0014-05) Heat sink (F01-3511-01) Connecting cord assy (E30-6144-05)

  • Page 2: Block Diagram

    KAC-6403 BLOCK DIAGRAM AUDIO UNIT (X09-8542-70) Q101,102, Q103-114, C151,153,R165,167 201,202 119-126 ISOLATION POWER AMPLIFIER 80Hz 12dB/OCT AMPLIFIER -3dB ATT SPEAKER INPUT LINE IN A Q103-114, OUT A GAIN C152,154,R166,168 119-126 CONT. ISOLATION POWER AMPLIFIER 80Hz 12dB/OCT AMPLIFIER -3dB ATT MUTE...
  • Page 3 KAC-6403 COMPONENTS DESCRIPTION Ref. No Application / Function Operation / Condition / Compatibility Q11,12 DC/DC converter Turns on or off IC13 output. Q101,102 Input mute Absorbs shook noise when power turns on or off. Q103~106 Power AMP 1st deferential amplifier.
  • Page 4 KAC-6403 COMPONENTS DESCRIPTION Ref. No Application / Function Operation / Condition / Compatibility D203,204 Current mirror Current mirror load for 2nd deferential amplifier. D205,206 B-class stage mute Prevents reverse flow. D207~211 Over-current DET Prevents reverse flow. D601 LED control Controls D610’s power indicator.

  • Page 5: Pc Board (Foil Side View)

    KAC-6403 PC BOARD (FOIL SIDE VIEW) AUDIO UNIT X09-8542-70 (J76-0189-01) B-Lch 2.5mV DC voltmeter Q213 W165 W157 W533 W194 IDL+ Q223 W158 W167 W537 W195 W159 R455 W160 R449 Q217 R447 C419 R441 W168 Q219 R439 W112 W101 C421 TP44...
  • Page 6 KAC-6403 B-Rch 2.5mV DC voltmeter X09-8542-70 Ref. No. Address Ref. No. Address Q131 Q132 Q201 Q202 C314 C114 Q203 C316 Q214 R126 IDL- Q204 W533 IDL- IDL+ R124 Q224 Q205 R456 C420 Q226 R324 R455 C315 R450 Q225 R440 R442...
  • Page 7 KAC-6403 AUDIO UNIT (X09-8542-70) Q3,4 CONSTANT VOLTAGE Q5-12 POWER SUPPLY DC/DC CONVERTER 25.0V 15.0V DC/DC TP57 CONVERTER IC13 2.4V IN1+ IN2+ 5.0V IN1- 2.2K IN2- 3300u16 4.7K FBACK OUTCTRL TP356 1000P 2.2K R27 22K 3.6V TP357 14.2V -15.0V -25.0V TP60...
  • Page 8 KAC-6403 TP56 TP55 14.4V 14.4V Q604-606 R257 C223 POWER ON/OFF TP62 Q604 10 1/2W 0.047 TP54 Q603 R457 C423 INPUT 10u 50 10 1/2W 0.047 MUTE BATT DC/DC D603 TP368 R604 CONVERTER R258 C224 10 1/2W 0.047 TP53 R601 P CON...

  • Page 9: Exploded View

    KAC-6403 EXPLODED VIEW φ2.6x13 N09-6365-05 N80-3010-43 N83-3006-43 N89-3008-48 N80-3010-43 M4,Ni N09-4215-08 M6,Ni N09-6393-08 (Insulated sheet is contained in transistor) (X09-) X09-854 (Insulated sheet is contained in transistor) Parts with the exploded numbers larger than 700 are not supplied.

  • Page 10: Parts List

    KAC-6403 PARTS LIST New parts EXPLODED VIEW is on page 5. 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.
  • Page 11 KAC-6403 PARTS LIST AUDIO UNIT (X09-8542-70) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation E63-0939-05 PIN JACK (4P) R227,228 RK73FB2B473J CHIP R J 1/8W E58-1031-05 RECTANGULAR RECEPTACLE R229,230 RK73GB2A182J CHIP R 1.8K J 1/10W...
  • Page 12 KAC-6403 PARTS LIST AUDIO UNIT (X09-8542-70) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R443,444 RK73GB2A471J CHIP R 1/10W W526 R92-1252-05 CHIP R 0 OHM J 1/16W R445-448 RD14NB2E4R7J 1/4W W527 R92-2053-05 CHIP R...
  • Page 13 KAC-6403 PARTS LIST AUDIO UNIT (X09-8542-70) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation Q9,10 2SA1577 TRANSISTOR Q11,12 DTA114EUA DIGITAL TRANSISTOR Q101,102 2SC4081 TRANSISTOR Q103-106 2SA1576A(R,S) TRANSISTOR Q107-110 2SC1845-A(F,E) TRANSISTOR Q111,112 2SA992-A(F,E) TRANSISTOR Q113,114...

  • Page 14: Specifications

    Current Consumption .................. 25A Dimensions (W x H x D) ............ 330 x 60 x 230 (mm) Weight ..................2.7kg (6.0 lbs) KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. Installation Self-tapping screw (ø4 x 16 mm)

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