Component Description; Operation - Kenwood KRC-29Y Service Manual

QQ
3 7 63 1515 0
SYNTHESIZER UNIT (X14-641x-xx)
REF.
No.
Q1 P.CON. DETECTION
Q10 BACK-UP DETECTION
Q11 SERGE DETECTION
Q20 ACC DETECTION
Q40 PREOUT MUTE DRIVER Mutes when the base terminal voltage level becomes "L".
Q50 5V SW
Q101 DSI SW
Q151 PANEL 5V SW
Q201 NOISE DETECTION
Q221-224 PREOUT MUTE
Q251 POWER IC SVR SW
Q301 LOCAL SEEK SW
Q501 MOTOR DRIVER AVR
Q551 MAIN MOTOR SW
TE
L 13942296513
Q552 MAIN MOTOR SW
SWITCH UNIT (X13-989x-xx)
REF.
No.
IC1 LCD DRIVER
IC2 REMOTE SENSOR
Q1 KEY SCAN SW
Q2 KEY ILLUMINATION SW
Q3 KEY ILLUMINATION SW
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COMPONENT DESCRIPTION

FUNCTION
Detects P.CON voltage
Detects the back-up voltage.
Detects serge voltage.
Detects ACC voltage.
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
termial 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".
FUNCTION
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".
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KRC-29Y/35R,379R/RY,479R/RY,481R
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OPERATION

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OPERATION
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