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Documentation made available quickly and It is good quality. Thanks.
KDC-X679
COMPONENTS DESCRIPTION
Ref. No. Q10,11 Q12 Q13,15,16 Q17,18 Q19~21 Application / Function SERVO+B AVR (Panel Mecha) SW for IC7 FL&ILL AVR AUDIO 10.5V AVR Pre-Amp -9V AVR to OP Amp for Pre-out. Q22 and 24 works as a differential amplifier, Q23 works as a driver and +9.4V is supplied Q22~24 Q25,26 Q27,30 Q28,29 Q31 Q32 Q33,34 Q35 Q36 Q37,38 Q39 Q40 Q41,42 Pre-Amp +9V AVR to OP Amp for Pre-out. P-ANT SW P-CON SW P-CON Protection Ex Amp Control Buffer Small lamp det SW SERGE Det. BU det ACC det Pre-out mute driver Sub-out mute driver AC-out mute driver AM+B SW When Q32�base goes Hi, Q32 is turned on. When Q33�base goes Hi, IC4 is changed into a standby state. When Q35�base gose Hi, Q27 is turned on. When Q36�base gose Hi, Q29 is turned on. When a base gose Lo, mute driver is turned on. When a base gose Lo, mute driver is turned on. When a base gose Lo, mute driver is turned on. When Q42�base gose Hi, AM+B is out. DSI lights when the base is �L�. Q44 DSI Driver DSI turns off when the base is �H�. DSI turns on and off when panel is taken off. Q45,46 Q47~52 Q56,57 Q58,59 Q60 Panel 5V SW Pre-out mute SW AC-out mute SW Sub-out mute SW Level meter mute SW When Q46�base gose Hi, PANEL 5V is out. When a base gose Hi, Pre-out is muted. When a base gose Hi, AC-out is muted. When a base gose Hi, Sub-out is muted. When a base gose Hi, Level meter is muted. When Q23�base goes Hi, P-ANT SW outputs 14V. When Q30�base goes Hi, AVR outputs 14V. Protect Q27 by turning on when P-CON output is grounded. Operation / Condition / Compatibility When Q10�base goes Hi, S+B AVR outputs 8.5V. When Q12�base gose Lo, IC7 is turned on. When Q13�2pin goes Hi, ILL AVR outputs 10.5V. When Q16�base goes Hi, AVR outputs 10.5V. Q19 and 21 works as a differential amplifier, Q20 works as a driver and -9.1V is supplied
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