Kenwood kac-x522 Service Manual

Also see for KAC-X522: Instruction manual

Contents

Kenwood kac-x522 Service Manual Manual pdf 7 page image

KAC-X5227CIRCUIT DESCRIPTIONAD-ID309 (2/2)IC9(1/2)IC9AMP RECTMPU AD-PORTOUTPUTVOLTAGEDETECTIONLEVEL10u352701K10K7 5615K0.01 0.0110K1813K4703247L54+IC3J4 D302D301to OTHER AMPRECEIVETRANSMISSONto MPUTRANSMISSONRECEIVEBOTH DIRECTIONBUFFER42314.3K4.3K2702709571011 8610u2510K1.8K1.8KVCCSXGNDRXTXTYSYRY 67853214CLKDATANo. Item Alignment Point Method Align For Note Fig.Connect a DC voltmeter between1 IDEL CURRENT VR1 (Lch) the following emitter resistors. 2.5mV Over 2 minutes PC BOARDVR2 (Rch) R167 (L) aging is required. on page 10.R168 (R)ADJUSTMENT● Current detection circuitAmplify and rectify potential differences attwo points in the primary-side current circuitand send it to the AD-port of the MPU andobtain data for displaying current value.● Constant current output circuitRemove troubles caused by the potentialdifferences between the constant currentoutput and the GND, so that the GND po-tential differences between the head unit andthe AMP is not overlapped in the AMP tohead unit communication.● I2C bufferUsing an IC for I2C communication, be-tween-AMP communication is conducted sothat there will be no trouble from GND po-tential differences.10K10KJ3Q301Q303Q305Q307to Head unitHead unit GNDCONSTANTCURRENT AMPGNDfromMPU34 2 1117812610591347 47REQCHead unit-GND100K12K1.5K1.5K20K