
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
Ampli
fi
es 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 o5V.
Q22,23
PON5V
When Q23’ base goes Hi, PON5V o5V.
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
IllumB AVR
When Q52&Q53’ go ON, AVR outputs 10V.
Q52,53
IllumB 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.