5
DPX304/DPX308U/DPX404U
DPX-MP3120/U5120/U5120S
COMPONENTS DESCRIPTION
●
CD PLAYER UNIT (X32-6240-00): DPX304, DPX-MP3120
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC3
4ch BTL Driver
Driver for focusing & tracking coil, driver for sled & spindle motor, and opera-
tion for disc loading & ejection.
IC4
Servo DSP with built-in Audio DAC
With built-in MP3/WMA/ACC decoder and 1M-bit-SRAM.
IC5
BU1.5V/D3.3V REG.
Power supply for BU1.5V.
Power supply for digital/analogue/audio 3.3V.
Q1
APC (Auto Power Control)
Drives LD (Laser Diode).
Q10~12
5V-3.3V Level Shift
Converts signal from 5V to 3.3V, or from 3.3V to 5V.
Q13
Inverter
Inverts ZDET (Zero data DETection) signal.
Q14
D1.5V Output
Switches ON/OFF at one end of BU1.5V line which is separated into 2 direc-
tions.
Uses output voltage as D1.5V.
D1
Level Down
Lowers signal level by about 1.2V so that Lo level signal that turns the regula-
tor ON/OFF surely becomes Lo judgment level of the regulator SW.
D2
Laser Diode Protection
Prevents reverse bias which is applied to laser.
Laser destruction prevention.
D3,4
Static Electricity Countermeasure
Prevents malfunction by static electricity.
●
CD PLAYER UNIT (X32-6260-01): DPX308U/DPX404U, DPX-U5120/U5120S
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 opera-
tion 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.
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 mal-
function by static electricity is prevented.