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Kenwood KAC-PS521 Service Manual
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Kenwood KAC-PS521 Service Manual

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See also: Instruction Manual
POWER AMPLIFIER
KAC-PS521
KAC-X521

SERVICE MANUAL

Fuse (30A)
(F52-0015-05)
Cover
(F07-1138-12): KAC-X521
(F07-1139-12): KAC-PS521
Screw
Screw
(N07-0003-08)
(N09-4214-08)
FUSE(30A×2)
POWER IN
© 2004-2 PRINTED IN JAPAN
B53-0139-00 ( N ) 2439
Heat sink
(F01-1751-01)
FAN
VOLT
MENU
TEMP
CURR
ID NUMBER
TO H/U
REMOTE
RESET
Screw set
(N99-1752-05)
Screw set
(N99-1577-15)
Accessory
(W01-1606-05)

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Summary of Contents for Kenwood KAC-PS521

  • Page 1: Service Manual

    B53-0139-00 ( N ) 2439 Heat sink (F01-1751-01) VOLT MENU TEMP CURR Screw Screw (N07-0003-08) (N09-4214-08) FUSE(30A×2) POWER IN ID NUMBER TO H/U REMOTE RESET Fuse (30A) (F52-0015-05) Screw set Cover (N99-1752-05) (F07-1138-12): KAC-X521 (F07-1139-12): KAC-PS521 Screw set (N99-1577-15) Accessory (W01-1606-05)

  • Page 2: Block Diagram

    KAC-PS521/X521 BLOCK DIAGRAM (X09-5760-10) POWER AMP L.P.F Q101,102 IC3,4,6 IC1,10 MUTE I.S.A I.F.S CONT. H.P.F DRIVER (X08-4150-10) 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-PS521/X521 COMPONENTS DESCRIPTION Ref. No Application / Function Operation / Condition / Compatibility H/U 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 DC/DC converter (IC2) ON/OFF...

  • Page 4: Microcomputer's Terminal Description

    KAC-PS521/X521 MICROCOMPUTER’S TERMINAL DESCRIPTION MICROPROCESSOR : 784224YGC117 (X09 : IC6) ◊ Block Digram 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 LX_RST AUDIO_MUTE HU_BU E2PROM I2C Display data monitor communication AD-I...
  • Page 5 KAC-PS521/X521 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-PS521/X521 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-PS521/X521 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-PS521/X521 PC BOARD (COMPONENT SIDE VIEW) PREAMPLIFIER UNIT X08-4150-10 (J76-0010-12) MONO R101 R102 R103 R104 R106 R105 C101 R115 C102 R114 C103 R107 R108 R111 R112 X08-4150-10 Ref. No. Address Refer to the schematic diagram for the values of resistors and capacitors.

  • Page 9: Pc Board (Foil Side View)

    KAC-PS521/X521 PC BOARD (FOIL SIDE VIEW) PEAMPLIFIER UNIT X08-4150-10 (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-PS521/X521 PC BOARD (FOIL SIDE VIEW) 2.5mV AUDIO UNIT X09-5760-10 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-PS521/X521 X09-5760-10 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-PS521/X521 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 149,301,304,341-344,357 D2,81,302,315 LM1MA142WK-G UPC494GS Q51,52 2SC4097 D3,103,301 LM1MA142WA-G P82B96PN Q53,54 2SA1577 D51,52 RM4ZLF-J1NF BA10393F Q55-60 2SK3662-F S5566B-Q 784224YGC117 SIGNAL LINE 2SD2012-F UDZS4.7B PST3436UL-E GND LINE 2SB1375-F RD16JS(B) BR24C01AF-W B LINE Q63,69,111,112,142,145,302,303,305,306 2SA1576A FCH10A20...
  • Page 13 KAC-PS521/X521 15.0V C310 C309 0.01 CURRENT SIGNAL AMP (1/2) 0.01 R331 D309 (2/2) R441 R333 AL LINE DC/DC C R332 LINE 5.0V -15.0V 5.0V 15.0V +15V AVR R65 10 CN10 3900u16 IC10 (1/2) 22u25 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-PS521/X521 (1/2) X09-5760-10 A/2 (3/3)
  • Page 15 KAC-PS521/X521 (X08-4150-10) 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 10u16 TP30 TP25 TP20 10u16 0.22 0.22 TP64 0.22 0.22 HI P IC1(1/4) (4/4) TP29 TP180 I.F.S...
  • Page 16 TP112 customer. TP113 • DC voltages are as measured TP114 with a high impedance volt- TP115 meter. Values may vary 3.5V slightly due to variations be- 1.5V tween individual instruments or/and units. ED1(SEGMENT) KAC-PS521/X521 (2/2) X08-4150-10 (2/2)

  • Page 17: Exploded View

    KAC-PS521/X521 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 (X09-) : N89-3008-48 (B/2) φ3x16 : N89-3016-48 φ3x14...

  • Page 18: Parts List

    RK73GB2A332J CHIP R 3.3K J 1/10W B11-1446-04 REFLECTION SHEET RK73GB2A222J CHIP R 2.2K J 1/10W B11-1447-04 OPTICAL DIFFUSER RK73GB2A153J CHIP R J 1/10W E1 : KAC-PS521 K : KAC-X521 (E : Europe K : North America) Indicates safety critical components.
  • Page 19 0.010UF K C458-461 CK73GB1H103K CHIP C 0.010UF K C63,64 C90-5588-05 ELECTRO 47UF 25WV C65,66 CK73GB1H103K CHIP C 0.010UF K E41-0928-05 PIN ASSY (3P) E1 : KAC-PS521 K : KAC-X521 (E : Europe K : North America) Indicates safety critical components.
  • Page 20 R95,96 RK73GB2A152J CHIP R 1.5K 1/10W R311 RK73GB2A203J CHIP R 1/10W R97,98 RK73GB2A102J CHIP R 1.0K 1/10W R312,313 RK73GB2A152J CHIP R 1.5K 1/10W E1 : KAC-PS521 K : KAC-X521 (E : Europe K : North America) Indicates safety critical components.
  • Page 21 R479,480 RK73GB2A103J CHIP R J 1/10W VR1,2 R12-0092-05 SEMI FIXED VARIABLE RESIST 220 PST3436UL-E MOS-IC W501-511 R92-2053-05 CHIP R J 1/8W IC9,10 BA4560F E1 : KAC-PS521 K : KAC-X521 (E : Europe K : North America) Indicates safety critical components.
  • Page 22 DTC114EUA DIGITAL TRANSISTOR Q354 DTA114EUA DIGITAL TRANSISTOR Q355 DTC114EUA DIGITAL TRANSISTOR Q356 2SC3902 TRANSISTOR Q357 2SC4081 TRANSISTOR Q358 2SC3902 TRANSISTOR Q403,404 2SC945(A)(Q,P) TRANSISTOR E1 : KAC-PS521 K : KAC-X521 (E : Europe K : North America) Indicates safety critical components.
  • Page 23 KAC-PS521/X521 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

    KENWOOD ELECTRONICS GULF FZE KENWOOD ELECTRONICS UK LIMITED P.O. Box 61318, Jebel Ali, Dubai, U.A.E. Kenwood House, Dwight Road, Watford, Herts, WD18 9EB, United Kingdom KENWOOD ELECTRONICS (THAILAND) CO., LTD. KENWOOD ELECTRONICS DEUTSCHLAND GMBH 956 Udom Vidhya Building (Olympia) Rama IV Road, Silom, Bangrak, Bangkok 10500 Thailand Rembrücker-Str.

This manual is also suitable for:

Kac-x521

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