Kenwood DPX501 Service Manual page 5

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