Kenwood KAC 6403 free download

File name Kenwood KAC 6403.pdf

POWER AMPLIFIER KAC-6403 SERVICE MANUAL © 2006-1 PRINTED IN JAPAN B53-0378-00 (N) 540 Rear panel (A84-0410-02) Screw washer (N09-6393-08) Fuse (25A) (F52-0014-05) EXPLODED VIEW is on page 5. Screw washer (N09-4215-08) POWER AMPLIFIER A ch FILTER OFF HPF B ch FILTER OFF LPF INPUT SELECTOR LINE IN 1 2 3 4 MIN 5 1 0.5 2 3 4 MIN 5 0.5 0.3 0.2 MAX 0.3 0.2 MAX Ach Bch INPUT SENSITIVITY V Panel (A64-3834-02) FUSE 25A BATT. POWER IN GND P.CON BRIDGED LEFT RIGHT SPEAKER OUT Heat sink (F01-3511-01) Connecting cord assy (E30-6144-05) Screw set (N99-1587-05) Accessory (W01-1606-05) This product uses Lead Free solder. KAC-6403 BLOCK DIAGRAM AUDIO UNIT (X09-8542-70) J1 L LINE IN A IC2 R ISOLATION AMPLIFIER IC2 ISOLATION AMPLIFIER Ach INPUT GAIN CONT. VR1 IC9 +1 C151,153,R165,167 HPF 80Hz 12dB/OCT IC7 Q101,102, 201,202 S2 Q103-114, 119-126 POWER AMPLIFIER Q103-114, 119-126 S2 POWER AMPLIFIER MUTE IC4 L LINE IN B IC4 R ISOLATION AMPLIFIER S1 ISOLATION AMPLIFIER S1 VR2 S3 Bch INPUT GAIN CONT. S3 IC5 LPF+10dB 80Hz 12dB/OCT S3 IC6 +1 -3dB ATT IC5 S3 -1 -3dB ATT Q115-118,215-218 DC DETECT & OVER ROAD PROTECTION Q605 P.CON CIRCUIT TH1 THERMAL PROTECTION +6dB 0dB IC13 OVER VOLTAGE PROTECTION +29.5dB BATTERY P.CON Q203-214, 219-226 POWER AMPLIFIER Q203-214, 219-226 POWER AMPLIFIER L SPEAKER OUT B R J9 L SPEAKER OUT A R +1 -3dB ATT IC9 -1 C152,154,R166,168 HPF 80Hz 12dB/OCT IC7 +1 -3dB ATT A-AB J2 Q3,4 15V AVR L2 DC/DC CONVERTER SPEAKER INPUT COMPONENTS DESCRIPTION AUDIO UNIT (X09-8542-70) Ref. No IC1 IC2 IC3 IC4 IC5 IC6 IC7 IC9 IC13 Q3,4 Q5,6 Q7~10 Application / Function Buffer AMP Isolation AMP Buffer AMP Isolation AMP LPF -3dB ATT Buffer AMP Phase inverter DC/DC converter Constant voltage power supply DC/DC converter DC/DC converter Operation / Condition / Compatibility Amplifies 6dB by decreasing impedance. Decreases common mode noise. Amplifies 6dB by decreasing impedance. Decreases common mode noise. B-Rch side is phase inverter. B-Lch side is buffer amplifier. Decreases impedance. A-Lch side is buffer amplifier. Oscillates and controls DC/DC converter. Controls ±15V constant voltage. Switching FET. Drives Q5's and Q6's gates. 2 KAC-6403 COMPONENTS DESCRIPTION Ref. No Q11,12 Q101,102 Q103~106 Q107~110 Q111,112 Q113,114 Q115~118 Q119~122 Q123~126 Q131,132 Q201,202 Q203~206 Q207~210 Q211,212 Q213,214 Q215~218 Q219~222 Q223~226 Q231,232 Q601 Q602 Q603 Q604 Q605 Q606 Q610 Q611,612 Q613,614 Q615,616 Q617,618 D1 D2,3 D4,5 D6~10 D32~37 D101,102 D103,104 D105,106 D107~111 D201,202 Application / Function DC/DC converter Input mute Power AMP Power AMP Power AMP Power AMP Power AMP Power AMP Power AMP ATT signal control Input mute Power AMP Power AMP Power AMP Power AMP Power AMP Power AMP Power AMP ATT signal control B-class stage mute Mute Input mute Power ON/OFF Power ON/OFF Power ON/OFF Over-current DET DC output voltage DET DC output voltage DET B-class stage mute B-class stage mute Wrong connection protection AVR reference vol