Kenwood KACX621 free download

File name Kenwood-KACX621 caramp.pdf

POWER AMPLIFIER KAC-PS621 KAC-X621 SERVICE MANUAL © 2004-2 PRINTED IN JAPAN B53-0140-00 (N) 2704 Heat sink (F01-1752-01) FAN VOLT MENU TEMP CURR Screw (N07-0003-08) Screw (N09-4214-08) 23 POWER IN ID NUMBER Fuse (25A) (F52-0014-05) Cover (F07-1140-12): KAC-X621 (F07-1141-12): KAC-PS621 Screw set (N99-1752-05) 9 01 25 25 25 456 78 TO H/U REMOTE RESET LINE IN LINE OUT Screw set (N99-1577-15) Accessory (W01-1606-05) KAC-PS621/X621 BLOCK DIAGRAM 6dB 12dB 24dB OPERATION MO/ST IFS ON/OFF FILTER HPF/OFF/LPF SENSITIVITY 5V-0.2V AMP CONT ON/OFF IC1,10 IN L OUT IN R OUT ISO AMP ISO AMP IC1 ISF IC5 HPF LPF IC4,6 BUFFER IC3 CONTROL AMP Q101 MUTE Q107-135 POWER AMP OUT-L ISF HPF BUFFER CONTROL AMP MUTE POWER AMP OUT-R IC6 DISP. O.C. PROTE. D.C. PROTE. u-COM FAN Q66 O.V. PROTE. T.M. PROTE. 5V AVR Q61 H/U COM AMP COM Q62 -15V AVR GND P-CON +15V AVR DC/DC CONV. BATT COMPONENTS DESCRIPTION PREAMPLIFIER UNIT (X08-4150-10) Ref. No IC1 IC3 IC4 IC5 LPF Lch : 6dB voltage amplification IC6 Rch : Signal 180 reverse and 6dB voltage amplification IC7 LCD driver Controlled by microprocessor Infrasonic filter Tone and volume variable 6dB voltage amplification HPF Controlled by microprocessor Application / Function Operation / Condition / Compatibility AUDIO UNIT (X09-5770-10) Ref. No IC1 IC2 IC3 Buffer DC/DC converter AMP communication buffer Application / Function Operation / Condition / Compatibility 2 KAC-PS621/X621 COMPONENTS DESCRIPTION Ref. No IC5 IC6 IC7 IC9 IC10 Q50 Q51~54 Q55~60 Q61 Q62,63 Q64,65 Q66,68 Q69 Q70,71 Q81 Q91,92 Q97 Q101,102 Q103~112 Q113~118 Q119,120 Q121~124 Q125~132 Q133~140 Q141 Q142~145 Q146,147 Q148,149 Q249,250,263 Q301~307 Q310 Q313 Q341~344 Q346 Q347~349 Q351,352 Q353~358 Q403 Q404 Q601,602 Application / Function H/U communication buffer Microprocessor Reset IC Current detection Isolation amplifier 5V AVR DC/DC output driver DC/DC drive (Final) +15V AVR -15V AVR DC/DC converter (IC2) ON/OFF 5V AVR 5V AVR ON/OFF P-CON control +15V AVR (Constant current) DC/DC control AMP communication stability power supply Mute A class first stage amplifier A class 2nd stage amplifier Final temperature compensation Amplifier current detection (Current limiter) Final driver Final Mute control Shock noise prevention AMP current detection DC detection ATT control H/U communication output driver H/U communication ON/OFF H/U communication output driver H/U communication input driver H/U communication output driver AMP and H/U communication ON/OFF control BATT voltage output Fan stability power supply LCD backlight LED control LED control DC/DC drive (Final) Synchronized with temperature detection Controlled by microprocessor Operation / Condition / Compatibility 3 KAC-PS621/X621 MICROCOMPUTER'S TERMINAL DESCRIPTION MICROPROCESSOR : 784224YGC117 (X09 : IC6) Block Digram AMP communication I/F AMP_SCL AMP_SDA Audio control AUDIO_SCL AUDIO_SDA AUDIO_MUTE E2PROM I2C communication LX BUS I/F LX_REQ_M LX_REQ_S LX_DATA_M LX