KENWOOD KRC391Y
Service Manual

KRC-391/Y,36/Y,30Y
COMPONENT DESCRIPTION
q SYNTHESIZER UNIT(X14-6892/9002-XX)
REF.No. IC1 IC2 IC4 IC6 IC7 IC8 IC9 IC10 IC11 IC12 Q1 Q10 Q11 Q20 Q40 Q50 Q101 Q151 Q201 Q221-224 Q251 Q301 Q501 Q551 Q552 FUNCTION SYSTEM µ-COM E-VOLUME POWER AMPLIFIER RDS DECODER POWER IC MUTE CONTROL LOGIC EQUALIZER AMPLIFIER SUB MOTOR DRIVER RESET IC EEPROM P.CON.DETECTION BACK-UP DETECTION SERGE DETECTION ACC DETECTION PREOUT MUTE DRIVER 5V SW DSI SW PANEL 5V SW NOISE DETECTION PREOUT MUTE POWER IC SVR SW LOCAL SEEK SW MOTOR DRIVER AVR MAIN MOTOR SW MAIN MOTOR SW OPERATION

Speaker output

3 input NOR gate x 3 For full logical cassette mechanism control For full logical cassette mechanism sub motor driver Detection voltage below 3.0V Detects P.CON voltage. Detects the back-up voltage. Detects serge voltage. Detects ACC voltage. Mutes when the base terminal voltage level becomes "L". Works when the base terminal voltage level becomes "L". LED for DSI works when the base terminal voltage level becomes "H". Works when the base terminal voltage level becomes "L". Supplies VDD to panel. Detects noise. Mutes when the base terminal voltage level becomes "H". Discharges the capacitor's voltage of SVR terminal after the base terminal voltage becomes "H". Changes to the local seeking after the base terminal voltage becomes "H". Works when the base terminal voltage becomes "H". Supplies the power to the motor driver. Works when the base terminal voltage becomes "L". Works when the base terminal voltage becomes "H".

q SWITCH UNIT(X16-1532/1722-XX)
REF.No. IC1 IC2 Q1 Q2 Q3 FUNCTION LCD DRIVER REMOTE SENSOR KEY SCAN SW KEY ILLUMINATION SW KEY ILLUMINATION SW OPERATION

Receives key signal when the base terminal voltage becomes "L". Key illumination color becomes green when the base terminal voltage becomes "H". Key illumination color becomes red when the base terminal voltage becomes "H".

3