KENWOOD KAC-649S free download

File name SM_kac649s.pdf

A.CH OPERATION STEREO MONO (Lch) A.CH FILTER OFF HPF LPF B.CH FILTER OFF HPF LPF B.CH OPERATION STEREO MONO (Lch) INPUT SELECTOR A B A LINE IN A B 1 2 3 4 0.5 0.3 2 3 4 1 0.5 0.3 L GND SPEAKER LEVEL INPUT R A B (MIN)5 0.2(MAX) A.CH INPUT SENSITIVITY(V) (MIN)5 0.2(MAX) B.CH INPUT SENSITIVITY(V) KAC-649S SERVICE MANUAL POWER AMPLIFIER FUSE(25A) 25 BATT. POWER IN SPEAKER P.CON OUTPUT BRIDGED LEFT RIGHT A B POWER AMPLIFIER LINE OUT A + B L R © 2001-4 PRINTED IN KOREA B51-7802-00 (K) 3387 KAC-649S COMPONENT DESCRIPTION AUDIO UNIT (X09-5420-10) REF. No. Q1-4 Q5-12 Q13 Q14-17 Q18-21 Q22-29 Q30-37 Q38-45 Q46 Q47 Q48 Q49 Q50,51 Q52 Q53 Q54,55 Q56,57 Q58-61 IC1,2 IC3,4 IC5 FUNCTION MUTE DIFFERENTIAL AMPLIFIER RIPPLE FILTER DIFFERENTIAL AMPLIFIER TEMPERATURE COMPENSATION OVER-CURRENT PROTECTION POWER AMPLIFIER DRIVER POWER STAGE P.CON. DETECTION POWER SWITCH MUTE ON/OFF MUTE DRIVER SWITCHING POWER STAGE OVER-CURRENT PROTECTION OVER-VOLTAGE PROTECTION CONSTANT VOLTAGE POWER SUPPLY SWITCHING DRIVER DIFFERENTIAL AMPLIFIER INPUT BUFFER / ISOLATION AMPLIFIER IC3,4 (1/2) : LPF IC3,4 (2/2) : INVERTER SWITCHING REGULATOR OPERATION Decreases shock noise in first moment when P.CON. turns on or off. Detects temperature of the heat sink, and protects bias current drift. Detects over-current, and limits the power stage current. Detects P.CON-ON, and turns Q47 on or off. Supplies power to IC5. Turns Q49 on or off. The detected over-current stops IC5's working. When over-voltage puts on BATT, Q53 turns P.CON. off. Supplies + and - 15V power. Makes an input signal 6 more dB signal, and cancels automobile noise. Oscillator for DC/DC converter. 2 KAC-649S ADJUSTMENT No. ITEM INPUT SETTINGS OUTPUT SETTINGS RECEIVER SETTINGS ALIGNMENT POINTS ALIGN FOR FIG. Connect a cassette receiver or CD receiver. Connect a DC voltmeter between CN1/CN2 and J1 (SP.OUT, L+/R-) (A) VR3 (L ch) VR4 (R ch) (B) VR5 (L ch) VR6 (R ch) 1 IDEL CURRENT - VOLUME : 0 2.5mV (a) (a) 2.5mV DC Voltmeter (a) 2.5mV DC Voltmeter J3 Lch (a) 2.5mV SP. OUT Rch Ach Bch VR3 (A-Lch) VR4 (A-Rch) DC Voltmeter VR6 (B-Rch) VR5 (B-Lch) L R CN1 (A) L R CN2 (B) (a) 2.5mV DC Voltmeter 3 A B C D E PC BOARD (Component side view) 1 AUDIO UNIT X09-5420-10 (J74-1198-21) E1 Q46 R201 D29 R198 R223 W97 R213 R216 R217 C108 J1 Q29 Q37 E B EB W42 W43 W44 L2 C114 C113 W213 Q45 D27 C124 R158 2 W100 W122 R229 R254 R227 C102 W125 W126 R234 R221 R218 C100 C109 C101 W207 R188 R172 R186 W208 W209 W222 Q36 B BE W93 W214 B D28 W110 16 9 Q28 R230 IC5 1 R238 R239 C110 8 C112 D41 C104 BE E C95 R165 E R228 R214 R215 E B Q48 R207 R206 D36 R197 W86 Q63 D40 Q62 Q44 W186 W182 W190 R195 R196 W123 Q53 R185 R250 C96 D30 W149 W225 R187 R251 R136 C86 E Q21 E D42 R145 W323 D37 B B R166 R144 C82 VR6 R135 W165 R253 W166 R155 W167 C77 R128 R112 R127 C76 Q61 E W319 L1 W164 D58 E C115 E R208 W108 R205 B R200 W402 W12 W13 D57 D33 C73 E R149