Kenwood kac-x522 Service Manual
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Kenwood kac-x522 Service Manual

Power amplifier
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POWER AMPLIFIER
KAC-X522
SERVICE MANUAL
Fuse (30A)
(F52-0015-05)
Cover
(F07-1177-02)
Screw washer
Screw washer
(N07-0003-08)
(N09-4214-08)
FUSE(30A×2)
POWER IN
© 2006-1 PRINTED IN JAPAN
B53-0374-00 ( N ) 589
Heat sink
(F01-3533-01)
FAN
VOLT
MENU
TEMP
CURR
Dressing panel
(A21-6505-02)
ID NUMBER
TO H/U
REMOTE
RESET
LINE IN
LINE OUT
Panel
(A64-3924-02)
Screw & Wrench key set
(N99-1770-15)
Screw set
(N99-1577-15)
Accessory
(W01-1606-05)

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  • Page 1 POWER AMPLIFIER KAC-X522 SERVICE MANUAL © 2006-1 PRINTED IN JAPAN B53-0374-00 ( N ) 589 Heat sink (F01-3533-01) VOLT MENU TEMP CURR Screw washer Screw washer Dressing panel (N07-0003-08) (N09-4214-08) (A21-6505-02) FUSE(30A×2) POWER IN ID NUMBER TO H/U REMOTE RESET...

  • Page 2: Block Diagram

    KAC-X522 BLOCK DIAGRAM (X09-5760-11) POWER AMP L.P.F Q101,102 IC3,4,6 IC1,10 MUTE I.S.A I.F.S CONT. H.P.F DRIVER (X08-4150-11) to H/U DC PROT u-COM to POWER AMP CURRENT PROT V PROT. TEMP PROT. SW 5V 5V AVR Q356,358 FAN AVR +15V AVR...
  • Page 3 KAC-X522 COMPONENTS DESCRIPTION Ref. No Application / Function Operation / Condition / Compatibility Head unit communication buffer Microprocessor Reset IC E2PROM Current detection IC10 Isolation amplifier 5V AVR Q51~54 DC/DC output driver Q55~60 DC/DC +15V AVR Q62,63 -15V AVR Q64,65...

  • Page 4: Microcomputer's Terminal Description

    KAC-X522 MICROCOMPUTER’S TERMINAL DESCRIPTION MICROPROCESSOR (X09 : IC6) 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-X522 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-X522 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: Circuit Description

    KAC-X522 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.

  • Page 8: Pc Board (Component Side View)

    KAC-X522 PC BOARD (COMPONENT SIDE VIEW) PREAMPLIFIER UNIT X08-4150-11 (J76-0010-12) MONO R101 R102 R103 R104 R106 R105 C101 R115 C102 R114 C103 R107 R108 R111 R112 X08-4150-11 Ref. No. Address Refer to the schematic diagram for the values of resistors and capacitors.

  • Page 9: Pc Board (Foil Side View)

    KAC-X522 PC BOARD (FOIL SIDE VIEW) PREAMPLIFIER UNIT X08-4150-11 (J76-0010-12) TP15 TP23 TP29 TP25 TP30 TP21 TP123 TP125 TP124 TP121 TP31 TP118 TP106 TP119 TP28 TP117 TP105 TP120 TP72 TP104 TP116 TP64 TP103 TP122 TP60 TP102 TP126 TP59 TP127 TP101...
  • Page 10 KAC-X522 PC BOARD (FOIL SIDE VIEW) 2.5mV AUDIO UNIT X09-5760-11 A/2 (J76-0013-11) DC voltmeter W253 W132 D133 2.5mV W544 W539 DC voltmeter Q133 Q137 Q136 Q134 Q135 Q139 Q119 W210 W148 W113 W520 W211 W179 W112 W149 W180 R171 R168...
  • Page 11 KAC-X522 X09-5760-11 Ref. No. Address Ref. No. Address Q123 X09 B/2 Q124 Q125 Q126 Q127 Q128 D251 Q129 C252 IC10 Q130 C251 R330 Q131 W517 R331 Q132 Q133 Q140 Q138 Q120 R332 R333 Q134 Q135 C309 Q136 R162 R172 R170...
  • Page 12 KAC-X522 (X09-576x-xx) Q50,68,70,71,97,101,102,143,144,148, 2SC4081 D1,303,306-308,311,313,314,319 STZ6.8N IC1,9,10 BA4560F MODEL C15,16, C141, 149,301,304,341-344,357 D2,81,302,315 LM1MA142WK-G UPC494GS-A UNIT NAME 101,102 Q51,52 2SC4097 D3,103,301 LM1MA142WA-G P82B96PN KAC-PS521 Q53,54 2SA1577 D51,52 RM4ZLF-J1NF BA10393F 0-10 22u25 100u6.3 KAC-X521 Q55-60 2SK3662-F S5566B-Q 784224YGC117A 2SD2012-F UDZS4.7B PST3436UL-E...
  • Page 13 KAC-X522 15.0V C310 C309 0.01 CURRENT SIGNAL AMP (1/2) SIGNAL LINE 0.01 R331 D309 (2/2) GND LINE R441 B LINE R333 DC/DC CON R332 B LINE 5.0V -15.0V 15.0V +15V AVR R65 10 CN10 3900u16 IC10 (1/2) ∗ 3900u16 R17 10K C13 15P 0.01...
  • Page 14 100P appliance is returned to the customer. 5.0V • DC voltages are as measured with a high impedance voltmeter. Values may vary slightly due to variations between individual instruments or/and units. KAC-X522 (1/2) X09-5760-11 A/2 (3/3)
  • Page 15 KAC-X522 PREAMPLIFIER UNIT (X08-415x-xx) LOW PASS TP184 +10dB type TP61 TP187 TP186 TP78 0.022 3.3K 2.2K IC5(4/4) TP37 15.0V -15.0V TP63 TP62 ∗ TP181 TP76 TP31 TP30 TP25 ∗ TP20 0.22 0.22 TP64 0.22 0.22 HI P IC1(1/4) (4/4) TP29 TP180 I.F.S...
  • Page 16 TP115 customer. 3.5V 1.5V • DC voltages are as measured with a high impedance volt- meter. Values may vary slightly due to variations be- tween individual instruments or/and units. ED1(SEGMENT) KAC-X522 (2/2) X08-4150-11 (2/2)

  • Page 17: Exploded View

    KAC-X522 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 18: Parts List

    KAC-X522 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 19 KAC-X522 PARTS LIST PREAMPLIFIER UNIT (X08-4150-11) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation RK73GB2A222J CHIP R 2.2K J 1/10W CD04BJ1E221M ELECTRO 220UF 25WV RK73GB2A224J CHIP R 220K J 1/10W CD04BJ1V100M ELECTRO 10UF 35WV...
  • Page 20 KAC-X522 PARTS LIST AUDIO UNIT (X09-5760-11) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation J13-0602-05 FUSE HOLDER R119,120 RD14BB2C102J 1.0K J 1/6W R121-124 RD14BB2C221J J 1/6W L33-1972-05 CHOKE COIL (25UH) R125-128 RD14BB2C682J 6.8K J 1/6W...
  • Page 21 KAC-X522 PARTS LIST AUDIO UNIT (X09-5760-11) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation R323 RK73GB2A392J CHIP R 3.9K J 1/10W S79-0853-05 DIP SWITCHES R324 RK73GB2A272J CHIP R 2.7K J 1/10W R325,326 RK73GB2A105J CHIP R 1.0M...
  • Page 22 KAC-X522 PARTS LIST AUDIO UNIT (X09-5760-11) Desti- Desti- Ref. No. Parts No. Description Ref. No. Parts No. Description nation nation 2SB1241 TRANSISTOR DTC114EUA DIGITAL TRANSISTOR 2SB1238 TRANSISTOR 2SC4081 TRANSISTOR 2SA1576A TRANSISTOR Q70,71 2SC4081 TRANSISTOR 2SK246(BL)-F Q91,92 DTA114EUA DIGITAL TRANSISTOR 2SC4081...
  • Page 23 KAC-X522 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 24: Specifications

    Signal to Noise Ratio ..........105dB Amplifier Control Section (EQ) 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 ............

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