Kenwood KDC-MP628, Service Manual

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KDC-MP628/MP7028/MP728
MP8029/W7031/W7031Y
3
COMPONENTS DESCRIPTION
●
ELECTRIC UNIT (X34-3xxx-xx)
Ref. No. Application / Function Operation / Condition
IC10 AUDIO8V REF POWER SUPPLY 1.27V output
IC60 SWITCHING REGULATOR CONTROLLER
VFD / Mechanism digital power supply.
OUT1 : VFD (4.7V), OUT2 : Mechanism digital (5V)
IC80 FL+B VFD power supply (57V)
IC100 RESET IC "L" when detection voltage is 3.6V or less
IC102 SYSTEM
µ
-COM FM/AM tuner / Changer / CD mechanism / Panel / Volume / Tone control
IC103 MUTE DRIVER Mute control
IC104 E2PROM Installer memory
IC200 POWER CONTROL IC Power control switching
IC300 E-VOL & SOURCE SELECTOR Source / Volume / Tone control
IC400 RDS DECODER
IC450 PANEL MECHA MOTOR DRIVER
IC451 G-ANALYZER Analog gravity sensor
IC500 SPECTRUM ANALYZER BUFFER AMP & AGC Spectrum analyzer buffer / Auto gain control
IC600
±
9V AVR 5V pre-out power supply
IC601~603 5V PREOUT AMP Buffer/Gained control
IC750 POWER IC Front L/R and a rear L/R signal amplification
IC800 AUDIO3.3V REF SUPPLY / SVR6.8V REF SUPPLY
Supplying audio 3.3V reference voltage to E-VOL/LPF
Supplying SVR6.8V reference voltage to IC750 (POWER IC)
Q10,11 AUDIO8V AVR When Q11 base is “H”, A8V is output
Q12 SW14V When base is “H”, SW14V is output
Q20,21 B.U.5V AVR When backup is “ON”, BU5V is output
Q22,23 SW5V When Q23 base is “H”, SW5V is output
Q30,32 MOTOR+B AVR (PANEL MECHA) When Q9 base is “H”, 7.5V MOTOR+B is output
Q31,33 SERVO+B AVR When Q33 base is “H”, 8V SERVO+B is output
Q40,42,45 PANEL5V AVR When Q42 base is “H”, PANEL5V is output
Q41,43,44 ILLUMINATION AVR When Q43 base is “H”, 10.5V ILLUMI voltage is output
Q50~52 SW16W (SERGE PROTECTION) When Q51 base is “H”, SW16V (13V) is output
Q60 VFD (4.7V) AVR SW When base is “H”, VFD AVR is turned “OFF”
SWITCHING REGULATOR FREQUENCY
Q61
CONTROL SW (IC60)
IN1 IN2 PANEL MECHA
L L WAIT
L H OPEN
H L CLOSE
H H STOP
F SEL2 (BASE)
F SEL1
L H
(BASE)
L 400kHz 600kHz
H 650kHz 850kHz