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POWER AMPLIFIER
KAC-X542
SERVICE MANUAL
Screw washer
(N07-0003-08)
FUSE(30A×2)
Fuse (30A)
(F52-0015-05)
Cover
(F07-1178-02)
Screw washer
(N09-4214-08)
POWER IN
© 2006-1 PRINTED IN JAPAN
B53-0375-00 ( N ) 589
Heat sink
(F01-3534-01)
FAN
VOLT
MENU
TEMP
CURR
Dressing panel
(A21-6506-02)
ID NUMBER
TO H/U
REMOTE
RESET
Panel
(A64-3925-02)
Screw & Wrench key set
(N99-1770-15)
Screw set
(N99-1577-15)
Accessory
(W01-1606-05)
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Table of Contents
Related Manuals for Kenwood KAC-X542
Summary of Contents for Kenwood KAC-X542
- Page 1 POWER AMPLIFIER KAC-X542 SERVICE MANUAL © 2006-1 PRINTED IN JAPAN B53-0375-00 ( N ) 589 Heat sink (F01-3534-01) VOLT MENU TEMP CURR Screw washer Screw washer Dressing panel (N07-0003-08) (N09-4214-08) (A21-6506-02) FUSE(30A×2) POWER IN ID NUMBER TO H/U REMOTE RESET...
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Page 2: Block Diagram
KAC-X542 BLOCK DIAGRAM (X09-5780-11) (X08-4160-11) 27db HIGH Q305,307,311 Q323,325 PASS RCA IN ISOLATION DIFFERENTIAL B-CLASS BUFFER MUTE1 AMPLIFIER STAGE STAGE HIGH Q306,308,312 Q320,322 PASS ISOLATION DIFFERENTIAL B-CLASS BUFFER MUTE1 AMPLIFIER STAGE STAGE RCA IN HIGH Q405,407,411 Q423,425 PASS RCA IN... -
Page 3: Audio Unit (X09-5780-11)
KAC-X542 COMPONENTS DESCRIPTION AUDIO UNIT (X09-5780-11) Ref. No Application / Function Operation / Condition / Compatibility IC1,2 Input isolation amplifier Microprocessor Microprocessor reset IC Current detection circuit voltage amplification LX communication LX-CLK, LX-DATA-M comparator AMP I2C communication signal level converter... -
Page 4: Microcomputer's Terminal Description
KAC-X542 MICROCOMPUTER’S TERMINAL DESCRIPTION MICROPROCESSOR (X09 : IC3) Block Diagram AMP communication I/F LX BUS I/F AMP SCL LX REQ M AMP SDA LX REQ S LX DATA M Audio control LX DATA S AUDIO SCL LX CLK AUDIO SDA... - Page 5 KAC-X542 MICROCOMPUTER’S TERMINAL DESCRIPTION Pin No. Pin Name Function Processing Operation Description SCL AMP CLK input/output AMP communication AUDIO SCL CLK input/output with audio chip AUDIO SDA Data input/output with audio chip AUDIO MUTE Mute output to audio chip H : Mute OFF, L : Mute ON...
- Page 6 KAC-X542 MICROCOMPUTER’S TERMINAL DESCRIPTION Pin No. Pin Name Function Processing Operation Description TEST Flash ROM writing Not used Not used VDD0 AVDD AD-I First current detection (for display) AD-V BU voltage detection (for display) 78~80 TEMP1~TEMP3 Temperature detection 1~3 Logic Table...
- Page 7 KAC-X542 CIRCUIT DESCRIPTION Current detection circuit VOLTAGE MPU AD-PORT LEVEL OUTPUT 0.01 0.01 Amplify and rectify potential differences at DETECTION two points in the primary-side current circuit and send it to the AD-port of the MPU and obtain data for displaying current value.
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Page 8: Pc Board (Component Side View)
KAC-X542 PC BOARD (COMPONENT SIDE VIEW) PREAMPLIFIER UNIT X08-4160-11 (J76-0011-12) R247 C906 R248 C108 C102 R104 C114 C104 C106 R112 R126 R108 R116 R213 R233 R115 C115 R105 R217 R103 C101 C105 C103 R122 C107 R111 R107 R129 MONO R128... -
Page 9: Pc Board (Foil Side View)
KAC-X542 PC BOARD (FOIL SIDE VIEW) PREAMPLIFIER UNIT X08-4160-11 (J76-0011-12) TP11 TP13 TP24 TP10 TP14 TP41 TP12 TP20 TP25 TP15 TP40 TP22 TP42 TP17 TP45 TP44 TP23 TP21 TP28 TP30 TP19 TP18 TP34 TP170 TP27 TP31 TP26 TP33 TP152 TP16... - Page 10 KAC-X542 PC BOARD (FOIL SIDE VIEW) 2.5mV 2.5mV 2.5mV AUDIO UNIT X09-5780-11 A/2 (J76-0008-11) DC voltmeter DC voltmeter DC voltm W526 W530 W320 W321 W369 W627 W368 W346 D405 W594 W568 W598 W581 W537 W533 +15V D155 -15V W531 D203...
- Page 11 KAC-X542 2.5mV 2.5mV X09 B/2 DC voltmeter DC voltmeter D160 W511 W526 W156 Q419 W708 D161 D405 D404 W516 W521 W509 W507 W514 W513 W510 W527 R421 W512 R458 R457 R460 Q426 W151 W173 W213 W183 W163 W154 W116 W211...
- Page 12 KAC-X542 AUDIO UNIT (X09-578x-xx) (A/2) 15.0V D101 R170 (1/4) IC1(2/4) R109 R301 C301 10u50 R101 C103 10u50 R107 10K R125 10K C100 1000P R111 10K C131 15P D107 R100 Q905 R112 10K C132 15P R108 R126 10K (3/4) IC1(4/4) R110...
- Page 13 KAC-X542 36.0V Q319 C355 R333 1000P R341 Q323 D203 15.0V Q309 D301 R351 Q315 R337 C921 0.01 CURRENT SIGNAL AMP IDLE Q311 C309 1.5K (2/2) C301 (AL) Q301 Q303 R614 IC6(1/2) 10u50 R313 R174 R187 C315 10u50 R339 R179 R613 10K 1.5K...
- Page 14 KAC-X542 +15V AVR 15.0V DC/DC CONVERTER 3.3K Q901 R187 Q902 -15V AVR 36.0V 6.2K -15.0V ∗ ∗ -36.0V 0.01 5V SW 5V AVR 5.0V 100K 5.0V 8.2K OUT DC DET. 100K 0.01 71 10K 5.6K R573 14.4V R572 FAN+B TRANS.
- Page 15 • DC voltages are as measured with a high impedance voltmeter. Values may vary slightly due to variations between individual instruments or/and units. KAC-X542 (1/2) X09-5780-11 A/2 (4/4)
- Page 16 KAC-X542 PREAMPLIFIER UNIT (X08-416x-xx) CAUTION : For continued safety, replace safety criti- cal components only with manufacturer’s recom- mended parts (refer to parts R122 list). TP31 TP32 8.2K Indicates safety critical IC1(1/4) TP29 TP33 ∗ components. To reduce the TP36 ∗...
- Page 17 INPOUT SENS. HPF,12dB/oct, -15.0V F=VRcont IC4(2/4) TP91 ∗ ∗ 0.22 TP103 TP88 R22 8.2K TP104 -15.0V 15.0V TP90 TP102 KAC-X542 (2/2) (X08-416x-xx) IC1,2,4 NJM2058M-ZB MODEL UNIT C12,14-17,20,21,26,27,36,52,63,64, IC5,6 NJM4565MD-ZB NAME 75,101,102,107,108,114,115,200 SIGNAL LINE LC75853NE-E KAC-PS541 0-10 10u16 B30-1694-05 GND LINE...
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Page 18: Exploded View
KAC-X542 EXPLODED VIEW φ3x12 : N09-6216-05 φ4x8 : N09-6218-05 φ2x5 : N09-6220-05 φ4 WASHER : N15-1040-48 φ2x8(BLK) : N80-2008-43 φ3x10(BLK) : N80-3010-43 φ2x6 : N82-2006-48 φ2.6x6 : N84-2606-48 φ3x6(BLK) : N89-3006-43 φ3x8(BLK) : N89-3008-43 φ3x8 : N89-3008-48 φ3x16 : N89-3016-48 φ3x14... -
Page 19: Parts List
KAC-X542 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 20 KAC-X542 PARTS LIST PREAMPLIFIER UNIT (X08-4160-11) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation RK73GB2A473J CHIP R J 1/10W LC75853NE-E MOS-IC RK73GB2A752J CHIP R 7.5K J 1/10W E-TDA7409DTR ANALOGUE IC RK73GB2A153J CHIP R J 1/10W...
- Page 21 KAC-X542 PARTS LIST AUDIO UNIT (X09-5780-11) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation C150 CD04BJ1C220M ELECTRO 22UF 16WV E63-0922-05 PIN JACK (6P) C161 CD04BJ1H221M ELECTRO 220UF 50WV E56-0856-05 CYLINDRICAL RECEPTACLE (13P) C200 CQ93FMG1H102J...
- Page 22 KAC-X542 PARTS LIST AUDIO UNIT (X09-5780-11) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation RK73GB2A473J CHIP R J 1/10W R359 RD14NB2E221J J 1/4W RK73GB2A123J CHIP R J 1/10W R360 RK73GB2A330J CHIP R J 1/10W...
- Page 23 KAC-X542 PARTS LIST AUDIO UNIT (X09-5780-11) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R522 RK73GB2A203J CHIP R J 1/10W R973,974 RK73GB2A153J CHIP R J 1/10W R523 RD14BB2C473J J 1/6W VR5-8 R32-0294-05 SEMI FIXED VARIABLE RESISTOR...
- Page 24 KAC-X542 PARTS LIST AUDIO UNIT (X09-5780-11) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation W619-622 RK73EB2E000J CHIP R J 1/4W UDZS3.3B ZENER DIODE W623,624 R92-1252-05 CHIP R 0 OHM J 1/16W UDZS10B ZENER DIODE...
- Page 25 KAC-X542 PARTS LIST AUDIO UNIT (X09-5780-11) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation 2SA992-A(F,E) TRANSISTOR Q421,422 2SA965-F TRANSISTOR Q30,31 2SC4081 TRANSISTOR Q423,424 2SC3856NF TRANSISTOR Q41-44 2SC4081 TRANSISTOR Q425,426 2SA1492NF TRANSISTOR 2SC4081 TRANSISTOR Q901,902...
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Page 26: Specifications
Input Impedance ............10kΩ Amplifier Control Section (EQ) (B channel) Bass Frequency ......... 60/80/100/200Hz Bass Level ............-15dB~+15dB KENWOOD follows a policy of continuous advancements Bass Q Factor ........1.00/1.25/1.50/2.00 in development. Treble Frequency ......... 10/12/15/17kHz For this reason specifications may be changed without Treble Level ............