Sony XM-1502SX Training Manual page 45

0.2mW
LASER POWER
IC6
SLED
COIL
CD
DRIVE
OPTICAL
UNIT
DAX21EG
IC5
SPIN
DRIVE
IC1
RF AMP
LD
LD CTL
FOCUS
/TRACK
AMP
SERVO BD.
Although most of the ICs that control CD operation are on the CD Servo board (see Figure 4-8), the CD cannot
begin without the main CPU nor output sound without the audio processing both on the main board. Table 4-8
lists the CD ICs and their functions.
It is interesting to note that if the CD assembly were unplugged (CN6 and CN7) so there is no communications
between CD IC8 and the main CPU IC1010 via IC2003, the MEX-1HD will take 51 seconds for the 9kHz / 10kHz
AM spacing to appear on the display when power is input. It normally takes 5 seconds for the AM spacing to
appear.
ZCS3FX
ZCS1FX
INTRQ
IC8
ATAPI
CD ROM
RF,TE, FE
POWER
FIGURE 4-8 - STORAGE DEVICES
CLK
MAIN BD.
XCS4
CN7 CN2002
3
XCS1
4
XCS0
IC2003
10
CPU
INTR
INTERFACE
XCS0
INT
XCS1
R
HARD
DRIVE
(HDD)
ATAPI
DATA
BUS
CN6 CN2003
PWR
BOARD
CN3001 CN701
43
4. Car Music Storage Unit
FROM CPU IC1010
CS5
XIRQ
IC4001
DSP
SDO TO D/A IC371
MG
MEM
STICK
DISPLAY ICS
ADDRESS
DATA BUS
X1RQ1
IC4301
USB
INTERFACE
INT1
CN702 CN525
9
P.S.
MAIN_PON
4
5
SUB BD.
+12V BATT.
MEM
STICK
IN
SOCKET
IC4002
EEPROM
D 5V
PS4100
D I/O
IN
CS2,ACK,RST
FROM
IC1010 CPU
120 IC501
77 81
ACC
4-4A125 11/13/02