5
KDC-BT6544U/BT6544UY
/BT7043U/BT742U
●
SWITCH UNIT (X16-6500-21)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC2
Remote Controller
Remote control receiver.
Q5
PAN5V
When the base goes Hi, PAN5V is supplied for IC2.
Q20
Key Scan Timing Adjustment
When the base goes Hi, key scan starts.
Q21
PAN5V
When the base of Q5 goes Hi, PAN5V is supplied for IC2.
Q22
Grid Reversing Driver
When the base goes Hi, GRID1 is ON.
Q23
Grid Reversing Driver
When the base goes Hi, GRID2 is ON.
Q24
Grid Reversing Driver
When the base goes Hi, GRID3 is ON.
Q51
Left Sub-ILLUMI Controller
When the base goes Hi, left sub-illumination is ON.
Q52
Center 3-key ILLUMI Controller
When the base goes Hi, center 3-key illuminations are ON.
Q53
Right Sub-ILLUMI Controller
When the base goes Hi, right sub-illuminations are ON.
●
CD PLAYER UNIT (X32-6260-00)
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.
IC5
3.3V
→
5.0V Level Shift
Converts communication signal from 3.3V to 5.0V.
IC6
5.0V
→
3.3V Level Shift
Converts communication signal from 5.0V to 3.3V.
IC7
BU1.5V / BU3.3V Regulator
Power supply for digital back-up.
Power supply for mechanism
μ
-COM.
IC8
E2PROM
Memory for ROM correction.
Countermeasure for software malfunction.
IC9
A3.3V Regulator
Power supply for digital, analog and audio line.
Q3
D1.5V Output
The output voltage in which the power supply that diverges from the BU1.5V line
is turned on and off is used as D1.5V.
Q5
B.3.3V Output
The output voltage in which the power supply that diverges from the BU3.3V line
is turned on and off is used as D3.3V.
Q6
Control signal Inverter
Controls Q5.
Q7
APC (Auto Power Control)
Laser diode driver.
Q9
Control signal Inverter
Because the detection logic of LOE/LIM_SW is different in the mechanism
μ
-COM and the system
μ
-COM, the logic to the mechanism
μ
-COM side is
reversed.
D1
Laser Diode Protection
Prevents reverse bias which is applied to laser.
Laser destruction prevention.
D2,3
Countermeasure against Static Electricity
The potential difference between DGND and AGND is absorbed, and the
malfunction by static electricity is prevented.
COMPONENTS DESCRIPTION
