Kenwood KAC-PS650D Service Manual

Also see for KAC-PS650D: Instruction manual

Contents

KAC-PS650D/X650D3CIRCUIT DESCRIPTION71K1K361468PR3694.7KC359C3586 1268P543 5421R368871491011R36012135V4.7K4.7KR370R371UP-GATEDOWN-GATEC331R351 R35447PC3542.2K47u25C353100KR3576800PC371R37662KR37533K1KR3550.1+10u16 1K1KR356+651.5KR35974.7KR3581800P3K4.7K 3410KR363R366 82820R365 1 0.0110KR367C3571.5KR364OUTPUTMUTE680KC352R353910 745611 12C356R36234 34345500DEAD TIMEUP DOWN UP5D313(2/4)IC13 D312IC13(1/4)IC12(3/4) D311IC12(1/4)(2/4)IC12D310(4/4)IC12IC10 (2/2)Q13D5IC10D305D309D306(1/2)(1/2)IC11: Triangular wave form: Analogue signal: PWM wave formAfter PWM wave form is divided into up-gateand down-gate wave forms, this circuit makesoff-timing so that up-gate and down-gate waveforms do not turn on at same time.This circuit creates PWM wave formafter comparing triangular wave formand analogue signal .Triangular Wave Former CircuitPWM Wave FormerDead Time Oscillation Circuit21 receives mute signal from MUTE-2 terminal of u-COM ,and bias voltage of is short-circuited, and driver transistorsand final transistors on X08- get in condition of non-operation,and shock noise is prevented.Shock Noise Prevention Circuit21R17951010u16+33R183VR5 1.8KR12910KR452R45610K10KR517R51347R514476.8KR4576.8KR45810KR453R45410K47u251KR516+u-COM"MUTE-2"10KR451C464R44810KB10KR455+B220C151D153D151D435Q429Q426Q427Q428D431Q1595345