Kenwood KRC-29Y, Service Manual

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REF.
No.
FUNCTION OPERATION
IC1 LCD DRIVER
IC2 REMOTE SENSOR
Q1 KEY SCAN SW Receives key signal when the base terminal voltage becomes "L".
Q2 KEY ILLUMINATION SW
Key illumination color becomes green when the base terminal voltage
becomes "H".
Q3 KEY ILLUMINATION SW
Key illumination color becomes red when the base terminal voltage
becomes "H".
REF.
No.
FUNCTION OPERATION
Q1 P.CON. DETECTION Detects P.CON voltage
Q10 BACK-UP DETECTION Detects the back-up voltage.
Q11 SERGE DETECTION Detects serge voltage.
Q20 ACC DETECTION Detects ACC voltage.
Q40 PREOUT MUTE DRIVER Mutes when the base terminal voltage level becomes "L".
Q50 5V SW Works when the base terminal voltage level becomes "L".
Q101 DSI SW LED for DSI works when the base terminal voltage level becomes "H".
Q151 PANEL 5V SW
Works when the base terminal voltage level becomes "L". Supplies
VDD to panel.
Q201 NOISE DETECTION Detects noise.
Q221-224 PREOUT MUTE Mutes when the base terminal voltage level becomes "H".
Q251 POWER IC SVR SW
Discharges the capacitor's voltage of SVR terminal after the base
termial voltage becomes "H".
Q301 LOCAL SEEK SW Changes to the local seeking after the base terminal voltage becomes "H".
Q501 MOTOR DRIVER AVR
Works when the base terminal voltage becomes "H". Supplies the
power to the motor driver.
Q551 MAIN MOTOR SW Works when the base terminal voltage becomes "L".
Q552 MAIN MOTOR SW Works when the base terminal voltage becomes "H".
KRC-29Y/35R,379R/RY,479R/RY,481R
3
COMPONENT DESCRIPTION
SYNTHESIZER UNIT (X14-641x-xx)
SWITCH UNIT (X13-989x-xx)
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