109
XR-A550MD
D6.5/4.75 ~ 5.25V
MECHA
ACTUATOR
6.5/4.75 - 5.25V
D3.2V
AVCC
DVDD
DVDD
D3.2V
DIGITAL
3.2V
D3.2V
D4.3V
A3.2V
D4.3V
D3.2V
D3.2V
BACKUP
VOLTAGE
CONVERT
VOLTAGE
CONVERT
E
2
PROM
MOTOR
DRIVER
IC1601
AUDIO INPUT
AUDIO OUTPUT
BACKUP
MD MICON
MD SYSTEM
CONTROL
MICROCOMPUTER
DIGIN(EIAJ)
PDOWN
DIGOUT(EIAJ)
GND
GND
1
2
4
3
PLL
EXTERNAL
A/D
CONVERTER
D/A
CONVERTER
R.IN
R.OUT
AA.GND
AD.GND
AA.GND
L.IN
L.OUT
LOAD IN
RESET
MD-ST
DSCK
SERCH
1
2
24
23
22
21
20
19
18
17
16
15
14
4
5
6
7
8
9
13
10
11
12
3
D.GND
D.GND
D.GND
D.GND
DSTB
MDDATA
KDATA
4M
DRAM
ENCODER/DECODER
COMPRESSION
EXPAND LSI
ATRAC
IC1201
OSCILLATOR
XL1201
(33.8688MHz)
SW1956
SW1955
SW1954
SW1953
SW1952
MD
RECORDING HEAD
M901
SPINDLE MOTOR
M902
SLIDE MOTOR
M903
LOADING SW
REC SW
PLAY SW
LEAD IN SW
A-B SIGNAL
E-F SIGNAL
RF1 - RF4 SIGNAL
RF SIGNAL
PROCESS
IC1101
LOADING MOTOR
(HEAD UP/DOWN COMBINED)
M
M
DISC PROTECTION SW
M
LASER DIODE
MONITOR DIODE
RF4
RF3
RF2
RF1
FOR
LIGHT
RECEIVER
ERROR
SIGNAL
FOR
LIGHT
RECEIVER
RF
F
A
B
E
FOCUS
TRACKING
LIGHT PICKUP UNIT
7.3 BLOCK DIAGRAM
MD SECTION
www. xiaoyu163. com
QQ 376315150
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TEL 13942296513
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TEL 13942296513 QQ 376315150 892498299
TEL 13942296513 QQ 376315150 892498299
