3
KDC-BT40U/BT645U
KDC-U546BT
COMPONENTS DESCRIPTION
●
SWITCH UNIT (X16-678x-xx)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC2
Remote Control Sensor
Q20
Key Scan Timing Adjust
When the base is Hi, key scan starts.
Q21
Grid Reversing Driver
When the base is Hi, GRID1 is ON.
Q22
Grid Reversing Driver
When the base is Hi, GRID2 is ON.
Q23
Grid Reversing Driver
When the base is Hi, GRID3 is ON
●
ELECTRIC UNIT (X34-662x-xx)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
System
μ
-COM
Controls FM/AM tuner, CD mechanism, Panel, volume and tone.
IC2
E-VOL
Controls the source, volume and tone.
IC4
Power Supply IC
Outputs 5Vx2, 8.3V, 10.2V, P-CON and P-ANT.
IC6
Power IC
Ampli
fi
es the front L/R and the rear L/R to 50W maximum.
IC7
RDS IC
RDS decoder.
IC8
Reset IC
Lo when detection voltage goes below 3.6V.
IC51
SW REG
Power supply for D+5.1V. (to USB and panel)
IC52
Hi-side SW
Detection of USB over-current.
IC501
Tuner IC (ATomIC)
Tuner IC.
IC900
LPF
Bluetooth outputs low pass
fi
lter.
IC901
D+3.3V AVR IC
Power supply for BT+3.3V.
Q2,3
Servo+B AVR
When Q3'base goes Hi, AVR outputs 7.5V.
Q11,12
Control SW for Servo+B
ON when the base goes Hi.
Q13
Control SW for IC4
ON when the base goes Hi.
Q14
Control SW for IC4
ON when the base goes Lo.
Q53
FREQ CONT SW for IC51
When the base goes Lo, switching frequency becomes 1.3MHz.
When the base goes Hi, switching frequency becomes 1.8MHz.
Q101
ACC DET
ON when the base goes Hi during ACC is applied.
Q102
Surge DET
When the base goes Hi, surge voltage is detected.
Q103
BU DET
ON when the base goes Hi during BU is applied.
Q104,105
Mute Control
ON when the base goes Hi.
Q301
Panel 5V SW
ON when the base goes Lo.
Q707~706
Pre-out Mute SW
When a base goes Hi, Pre-out is muted.
Q707
Mute Driver for Pre-out
ON when the base goes Lo.
Q901
BT Module Reset Control
When the base goes Hi, BT module is reset.
Q902
Level Shift (5V
→
3.3V)
Dual FET.
●
CD PLAYER UNIT (X32-6260-01)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
Mechanism
μ
-COM
Controls DSP and peripheral circuit.
USB host controller. (Compliant with Universal Serial Bus Speci
fi
cation Rev2.0)
IC2
Servo DSP with Built-in Audio DAC
Built-in MP3·WMA·AAC decoder.
Built-in 1M-bit-SRAM.
IC3
4ch BTL Driver
Driver for focusing & tracking coil, driver for sled & spindle motor, and operation
for disc loading & ejection.
IC4
iPod Authentication
Connection authentication for iPod.
MFI341S2162: iPhone-compliant.