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Kenwood KAC-649S Service Manual

Kenwood kac-649s power amplifier service manual
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See also: Instruction Manual
POWER AMPLIFIER
KAC-649S

SERVICE MANUAL

POWER IN
BRIDGED
SPEAKER
LEFT
OUTPUT
FUSE(25A)
BATT.
P.CON
© 2001-4 PRINTED IN KOREA
B51-7802-00 (K) 3387
RIGHT
A
B
POWER AMPLIFIER

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Summary of Contents for Kenwood KAC-649S

  • Page 1: Service Manual

    POWER AMPLIFIER KAC-649S SERVICE MANUAL © 2001-4 PRINTED IN KOREA B51-7802-00 (K) 3387 POWER IN BRIDGED SPEAKER LEFT RIGHT OUTPUT FUSE(25A) BATT. P.CON POWER AMPLIFIER...

  • Page 2: Component Description

    KAC-649S COMPONENT DESCRIPTION AUDIO UNIT (X09-5420-10) REF. No. FUNCTION OPERATION Q1-4 MUTE Decreases shock noise in first moment when P.CON. turns on or off. Q5-12 DIFFERENTIAL AMPLIFIER RIPPLE FILTER Q14-17 DIFFERENTIAL AMPLIFIER Q18-21 TEMPERATURE COMPENSATION Detects temperature of the heat sink, and protects bias current drift.
  • Page 3 KAC-649S ADJUSTMENT INPUT OUTPUT RECEIVER ALIGNMENT ALIGN ITEM FIG. SETTINGS SETTINGS SETTINGS POINTS Connect a cassette receiver or CD receiver. Connect a DC VR3 (L ch) voltmeter IDEL VR4 (R ch) between VOLUME : 0 2.5mV CURRENT CN1/CN2 and J1 VR5 (L ch) (SP.OUT, L+/R-)

  • Page 4: Pc Board (Component Side View)

    PC BOARD (Component side view) AUDIO UNIT X09-5420-10 (J74-1198-21) C113 W213 R198 W214 W110 C114 W100 W207 C109 C101 W122 R188 R227 C102 R214 R234 W208 R221 W125 R218 R215 W209 R211 W126 W222 R157 C111 R252 W181 W401 W152 W223 R241 C103...
  • Page 5 AUDIO UNIT (X09-5420-10) 15.4V RIPPLE R150 FILTER R130 R151 INPUT BUFFER / IDLE. ADJ. (A) 3.3K R173 ISOLATION AMPLIFIER 6.8K 15.4V IC1(4/4) IC3(1/2) IC1(1/4) 10u16 R174 5.6K 0.47 0.33 1.8K 10u16 R125 IDLE. ADJ. 5.6K 5.6K 3.3K 10u16 C127 R175 10K(A) R113 1.8K...
  • Page 6 L+(A) C102 R227 L+(B) 0.047 L-(A) C103 R228 L-(B) 0.047 R-(A) R-(B) C104 R229 NJM4565MD R+(A) 0.047 R+(B) C105 R230 P-CON 0.047 BATT Q50,51 SWITCHING POWER R231 STAGE UPC494GS R224 W403 R225 Q56,57 R232 SWITCHING NJM2060M DRIVER KAC-649S (EKM) KAC-649S...

  • Page 7: Exploded View (Unit)

    : N87-3012-46 VR2 VR1 φ2.6x10 : N09-4382-05 φ3x10 (BLK) : N80-3010-45 S1 S3 S4 S5 S2 M4x8 (BLK) : N09-4026-05 φ2.6x6 : N89-2606-46 WASHER : N15-1040-46 φ3x6 : N09-4488-05 KAC-649S (EKM) Parts with exploded numbers larger than 700 are not supplied.

  • Page 8: Parts List

    KAC-649S PARTS LIST ✽ New Parts Parts without Part No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. (X09-5420-10) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Description Description Ref. No. Parts No.
  • Page 9 KAC-649S PARTS LIST ✽ New Parts Parts without Part No. are not supplied. Les articles non mentionnes dans le Parts No. ne sont pas fournis. (X09-5420-10) Teile ohne Parts No. werden nicht geliefert. Desti- Desti- Description Description Ref. No. Parts No.
  • Page 10 KAC-649S PARTS LIST ✽ New Parts Parts without Part 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- Description Description Ref. No. Parts No.

  • Page 11: Specifications

    Current Consumption (1KHz, 10% THD) .............18A Installation Size (Width x Height x Depth)............261mm x 57mm x 220mm Weight........................3.0Kg KENWOOD follows a policy of continuous advancements in development. For this reason specifications may be changed without notice. KENWOOD CORPORATION 14-6, Dogenzaka 1-chome, Shibuya-ku, Tokyo, 150-8501 Japan KENWOOD SERVICE CORPORATION KENWOOD ELECTRONICS ITALIA S.p.A.

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