Kenwood KAC-6404 Service Manual
Power amp
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Also See for KAC-6404:
- Product information (52 pages) ,
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- Instruction manual (29 pages)
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POWER AMPLIFIER
KAC-6404/7404
KAC-M645/M845
SERVICE MANUAL
A ch FILTER
B ch FILTER
LINE IN
OFF
LPF
OFF
LPF
[MIN]
[MAX]
[MIN]
[MAX]
A ch
B ch
B ch
INPUT SENSITIVITY[V]
LPF FREQUENCY[Hz]
KAC-7404(E type)
MAXIMUM
KAC-6404(K type)
MAXIMUM
POWER
KAC-M645(M type)
MAXIMUM
POWER
KAC-7404/M845
SPEAKER
LEVEL INPUT
4/3/2 Channel
Power Amplifier
POWER
KAC-6404(E type)
4/3/2 Channel
Power Amplifier
MAXIMUM
POWER
KAC-M845(M type)
4/3/2 Channel
Power Amplifier
MAXIMUM
POWER
© 2007-12 PRINTED IN JA PAN
B53-0606-00 ( N ) 519
KAC-6404/M645
FUSE [25A]
BRIDGED
FUSE [40A]
BATT.
P.CON
LEFT
POWER IN
KAC-7404/M845:Fuse (40A):(F52-0016-05)
KAC-6404/M645:Fuse (25A):(F52-0014-05)
4/3/2 Channel
P ower Amplifier
4/3/2 Channel
Power Amplifier
This product uses Lead Free solder.
RoHS
This product complies with the
SPEAKER OUTPUT
RIGHT
Connecting cord assy
(E30-6144-05)
19cm
Screw & wrench key set
(N99-1587-15)
Accessories
(W01-1606-05)
directive for the European market.
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Table of Contents
Related Manuals for Kenwood KAC-6404
Summary of Contents for Kenwood KAC-6404
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Page 1: Service Manual
[MIN] [MAX] [MIN] [MAX] A ch B ch B ch INPUT SENSITIVITY[V] LPF FREQUENCY[Hz] POWER IN KAC-7404/M845:Fuse (40A):(F52-0016-05) KAC-6404/M645:Fuse (25A):(F52-0014-05) KAC-7404(E type) 4/3/2 Channel Power Amplifier Connecting cord assy MAXIMUM POWER (E30-6144-05) 19cm Screw & wrench key set KAC-6404(K type) - Page 2 H.P.F IC1,2 Q103-125 ON /OFF. Q127,131 Q101 ISO- H.P.F MUTE (80Hz/-12dB) POWER AMP SENS. IC1,2 Q104-126 Q128 ,132 Q102 ISO- H.P.F MUTE (80Hz/-12dB) (INV) POWER AMP IC3,4 Q203-225 Q201 Q227 ,231 ISO- MUTE L.P.F POWER AMP SENS. (50~200Hz IC3,4 Q204-226 -12dB) Q228 ,232 Q202...
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Page 3: Components Description
KAC-6404/7404/M645/M845 COMPONENTS DESCRIPTION ● AUDIO UNIT (X09-8722-70/2-71) Ref. No. Application / Function IC1-4 Isolation circuit LPF Phase inversion IC8,9 Buffer amplifi er IC10 Temperature detection comparator IC13 DC/DC converter Q1,2,5,6 DC/DC converter power driver Q3,4 Constant voltage circuit (±15V) power driver... -
Page 4: Pc Board (Foil Side View)
KAC-6404/7404/M645/M845 PC BOARD (FOIL SIDE VIEW) AUDIO UNIT X09-8722-70/2-71 (J76-0469-01) TP55 W166 W151 TP41 W141 W167 W152 W142 W153 W132 TP54 W133 R449 R453 W186 R439 W149 W116 C419 W117 W586 TP356 W585 W576 TP368 W168 W169 W170 TP56 IC13... - Page 5 KAC-6404/7404/M645/M845 W551 C417 C217 R443 R471 R231 C219 R451 R271 R239 Q225 TP364 W552 R449 R253 TP366 R255 R243 R237 TP37 R439 W116 TP44 W100 TP38 Q119 W117 W195 TP356 W576 W515 C209 W519 R126 C215 W599 W533 TP31 W194...
- Page 6 KAC-6404/7404/M645/M845 IC1-5,7-10 BA4560RF D1,33 1N5406-TSC Q1,2,5,6 STP60NF06FP Q113,114,213,214 TL494IDR D2,3 UDZS16B 2SD2012-F 2SC4081(S) IC13 FCH10A20 2SB1375-F Q119,120,219,220 FRH10A20 Q7,8,602 2SC4097 2SC1627A-F D6,34,36,105,111,205,211 Q9,10 2SA1577 Q121,122,221,222 LM1MA142WK-G Q11,12 : DTA114EUA 2SA817A-F D7-11,101-104,107-110, Q101,102,115,116,127,128, Q123,124,223,224 201-204,207-210,601-603, 131,132,201,202,215,216, ∗ 605,608,613,615,616 227,228,231,232,605,606, Q125,126,225,226 1SS355 610-613,616,618 ∗...
- Page 7 KAC-6404/7404/M645/M845 ∗ SW12V ∗ 2200u16 5.0V ∗ ∗ 2200u16 IC13 2.5V IN1+ IN2+ IN1- IN2- ∗ FBACK 0.01 ∗ 3300u16 4.7K OUTCTRL 330K 3.3K ∗ ∗ 3300u16 10u50 R265 10u50 DC/DC CONVERTER TP358 R261 TP359 2-70 : +35.5V 0.01 2-71 : +24.7V -1.5dB...
- Page 8 KAC-6404/7404/M645/M845 SW12V SW12V R235 Q119 AL POWER AMP R233 R245 ∗ Q123 Q111 Q113 ∗ C259 R249 Q115 TP360 TP58 TP37 C215 C201 Q103 Q105 TP38 10u50 R227 R622 R265 ∗ R251 Q117 TP364 D105 Q101 R247 ∗ Q125 R237...
- Page 9 KAC-6404/7404/M645/M845 ∗ 2SA817A-F ∗ TP55 2SA992-A 18uH 14.4V 2SC1627A-F ∗ FUSE TP54 2SC1845-A 40A/25A 18uH 10u50 BATT TP368 TP53 P CON TP45 TP49 R257 C223 10 1/2W 0.047 TP46 R457 C423 TP50 10 1/2W 0.047 2SA1576A TP47 TP51 R258 C224 10 1/2W 0.047...
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Page 10: Exploded View
KAC-6404/7404/M645/M845 EXPLODED VIEW : N09-6365-05 φ2.6x13 : N80-3010-43 φ3x10 : N82-2608-43 φ2.6x8 : N89-3006-43 φ3x6 : N89-3008-48 φ3x8 : N89-3014-48 φ3x14 : N09-6447-05 φ3x10 M6 AU : N07-0003-08 M4 AU : N09-4214-08 ONLY USED KAC-7404/M845 ONLY USED KAC-7404/M845 Bundled to the transistor. -
Page 11: Parts List
CC73GCH1H030C CHIP C 3.0PF C23,24 CK73GB1H103K CHIP C 0.010UF K C427,428 CC73GCH1H101J CHIP C 100PF E : KAC-7404 E1 : KAC-6404 (Europe) K : KAC-6404 (North America) Indicates safety critical com po nents. M1 : KAC-M845 M2 : KAC-M645 (Other Areas) - Page 12 J 1/4W RK73GB2A474J CHIP R 470K J 1/10W R323-326 RK73EB2E104J CHIP R 100K J 1/4W E : KAC-7404 E1 : KAC-6404 (Europe) K : KAC-6404 (North America) Indicates safety critical com po nents. M1 : KAC-M845 M2 : KAC-M645 (Other Areas)
- Page 13 0 OHM J 1/16W R616 RD14BB2C392J 3.9K J 1/6W W556-558 R92-2053-05 CHIP R 0 OHM J 1/8W E : KAC-7404 E1 : KAC-6404 (Europe) K : KAC-6404 (North America) Indicates safety critical com po nents. M1 : KAC-M845 M2 : KAC-M645 (Other Areas)
- Page 14 2SA1576A(R,S) TRANSISTOR D613 1SS355 DIODE Q618 2SC4081 TRANSISTOR NCP18WB473J0S THERMISTOR D614 UDZS10B ZENER DIODE E : KAC-7404 E1 : KAC-6404 (Europe) K : KAC-6404 (North America) Indicates safety critical com po nents. M1 : KAC-M845 M2 : KAC-M645 (Other Areas)
- Page 15 KAC-6404/7404/M645/M845 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...
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Page 16: Specifications
Max Power Output Current Consumption KAC-7404/M845 ........720 W (180 W × 4) KAC-7404/M845 ............36 A KAC-6404/M645 ........500 W (125 W × 4) KAC-6404/M645 ............19 A Rated Power Output Dimensions (W × H × D) Normal (4 Ω) (20 Hz – 20 kHz, 1 % THD) .... - Page 17 KAC-6404/7404/M645/M845 PC BOARD (FOIL SIDE VIEW) AUDIO UNIT X09-8722-70/2-71 (J76-0469-01) TP55 W551 W166 W151 TP41 W141 C417 C217 W167 W152 W142 W153 R443 R471 R231 W132 C219 TP54 R451 R271 Q225 R239 W133 TP364 W552 R449 R453 TP366 R253 R255...
- Page 18 L1-3 PHASE INVERTER Q224 NAME 10,11 28,29 223,224 225,226 415,416 421,422 449-452 10u50 +11V KAC-7404 R436 2-70 2SC4468NF 2SA1695NF 3.3K 1.2K 6.8K 1.5K 5.6K BR POWER AMP Q220 KAC-M845 KAC-6404 2-71 2SC4467NF 2SA1694NF 2.7K 5.6K 1.5K 4.7K 4.7K KAC-M645 KAC-6404/7404/M645/M845...