4
KDC-MP738U/W7541U
/W7541UY/X792/X8009U
COMPONENTS DESCRIPTION
● ELECTRIC UNIT (X34-579x-xx)
Ref. No. Application / Function Operation / Condition / Compatibility
IC10 Audio8V Ref Power Supply Output 1.27V.
IC20 Regulator Power supply for BU3.3V.
IC60 Switching Regulator Power supply for 65V FL+B. (to PANEL)
IC80 Switching Regulator Power supply for D5V. (to USB/PANEL)
IC300 Hi-side SW Detection of USB Over Current & On/Off SW
IC310 G-Sensor Inclination detection (only 0-10)
IC340 RDS decoder IC RDBS & RDS ecoder. (only K & E type)
IC350 OPAMP Vref of IC480
IC450 Power IC Amplifies the front L/R and the rear L/R to 50W maximum.
IC480 Eelectrical Volume & Source Selecter Controls the source, volume, and tone.
IC500 System μ-com Controls FM/AM tuner, the changer, CD mechanism, Panel, volume and tone.
IC510 Reset IC “L” when detection voltage goes below 3.6V or less.
IC520 EEPROM Rom correction
IC530 Muting logic IC Controls logic for muting.
IC600 Logic IC Level Shift (3.3V→5V)
IC602 Logic IC Level Shift (5V→3.3V)
IC700 Sub μ-com USB/CD mechanism control
IC751 EEPROM Rom correction
IC752 iPod Authentication Coprocessor iPod Authentication
Q10 Audio8V AVR When Q11&Q12’ go ON, A8V AVR outputs 8.0V.
Q11,12 Audio8V AVR SW When Q12’ Base goes Hi, Supply current to IC10.
Q13,14 Audio8V AVR SW When Q14’ Base goes Hi, Q13 are ON.
Q20,21 B.U.5V AVR While BU is applied, BU5V AVR outputs +5V.
Q22,23 PON5V When Q23’ base goes Hi, PON5V outputs +5V.
Q30 Servo +B SW When Q31’ go ON, Servo +B outputs 8V.
Q31 Servo +B SW When Q13’ go ON, Q30 are ON
Q40,41 PANEL +5V SW When Q41’ base gose Hi, PANEL +5V is outputs.
Q45,46 FDC SW When PON-ILL (μ-CON) goes ON, AVR outputs 5V. (FL Filament)
Q50,51 Illumination+B AVR When Q52&Q53’ go ON, AVR outputs 10V.
Q52,53 Illumination+B SW When PON-ILL (μ-CON) goes ON, Hi, Q52 is ON.
Q70,71 SW15V When Q13’ go ON, The voltage appears. (~15V)
Q80 Change of Oscillation Frequency When Q80 is turned ON, the oscillation frequency at IC80 in the switching regulator
changes from 1MHz to 2.45MHz.
Q120 B.U Detected SW When Q120’ base gose Hi, B.U voltage is detected.
Q122 ACC Detect SW When Q122’ base gose Hi, Acc voltage is detected.
Q123 Surge Detect SW When Q123’ base goes Hi, Surge voltage is detected.
Q140,143 P-CON SW When Q140’ base goes Hi, AVR outputs 14V.
Q141,142 P-CON Protect Protect Q142 by turning on when P-CON output is grounded
Q150,151 Power Antenna SW When Q151’ base goes Hi, power antenna switch outputs 14V.
Q180 Small-lamp Detect SW When Q180’ base goes Hi, Small-lamp is detected.
