5
DPX501/501U/501UY
DPX-MP2090U
●
SWITCH UNIT (X16-353x-xx)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
Remote Control IC
Q1~3
GRID_DRIVER
Each transistor’s base is “L” then GRID is on.
Q6,7
SW5V
The power supply of IC1 is turned on when Q6’s base level goes “L”.
Q8
DBO LED SW
DBO LED is turned on when Q8’s base level goes “H”.
Q9
RED SW
RED LED is turned on when Q9’s base level goes “H”.
Q12
VFD Restart
Key scan start at Q12’s base goes “H”, when the set’s power is on.
●
CD PLAYER UNIT (X32-5830-00)
Ref. No.
Application / Function
Operation / Condition / Compatibility
IC1
Mechanism
µ
-com
IC2
Signal Processor
IC4
BTL Driver
Spindel motor, sled (including loading & eject) motor and pick-up actuator
IC5
SW3.3V Regulator
3.3V power supply for IC2, pick-up, IC18 digital part
IC13
Audio Active Filter
2nd LPF
IC14
A5V Regulator
3.3V power supply for DAC
IC15
DSP for Compression Audio Decoder
ACDrive decoder, MP3/WMA/AAC decoder
IC16
Compression Audio Codec SDRAM
IC17
Decoder Software &
Unique ID Strage Flash ROM
IC18
Audio D-A Converter (24-bit external)
External 24-bit for audio
IC19
BU3.3V Regulator
3.3V power supply for
µ
-com
IC20
1.8V Regulator
1.8V power supply for IC15 core part
IC21
Decoder/SDRAM/Flash ROM/
Power supply for decoder, SDRAM, flash ROM and USB driver.
USB Driver 3.3V Regulator
3.3V power supply for IC15 port parts, IC16, IC17, IC25, IC26 and IC28.
IC25
USB Host Controller
IC26
Switching among IC15 & Flash ROM &
For DSP for Compression Audio Decoder, Flash ROM, SDRAM and USB
SDRAM & USB
IC28
Clock SW
To SDRAM
Q3
Level Shift 3.3V
→
5V
Q6,7
Level Shift 3.3V
→
5V
Q8
APC (Auto Power Control)
Q9,10
Anticipation Sub-beam Delay
During non-searching
Q17
USB Hi-side SW
D2
Static Electricity Countermeasure
For IC2 built-in reset terminal
D3
Laser Diode Protection
D9
Static Electricity Countermeasure
COMPONENTS DESCRIPTION