Read Sharp CD-E250 (serv.man13) Service Manual online
CD-E250E
CD-E550E
– 20 –
Figure 20 BLOCK DIAGRAM (3/4)
+7V
+7V
M402
ROTATE
MOTOR
M401
UP/DOWN LOADING
MOTOR
+
–
+3.3V
+3.3V
TO MAIN SECTION
CONSTANT
VOLTAGE
CONSTANT
VOLTAGE
Q411
Q412
Q401,402
Q403,404
Q405,406
Q407,408
Q403,404
Q405,406
Q407,408
LASER
DRIVER
+3.3V
+3.3V
Q409
CD PICKUP UNIT
IC401
LC78646E
SERVO/SIGNAL CONTROL
VDD
LDD
LDS
M
+
–
M
CNP405
CNS205
CNS204
TRACKING COIL
FOCUS COIL
SW1
PICKUP IN
SW403
DISC NO.
DISC NO.
SW404
DISC 1
DISC 1
NM801
SLED
MOTOR
NM802
SPINDLE
MOTOR
M
M
XVDD
RVDD
LVDD
RFVDD
XL401
16.9344 MHz
CD RES
CL
DI
DO
CE
ROTATE
UP_SW
DOWN_SW
OPEN_SW
DISC NO._SW
DISC 1_SW
CLOSE_SW
DRF
VWRQ
MGND
VCC
VCC
IC402
LA6548D
FOCUS/TRACKING/
SPIN/SLED
DRIVER
XIN
XOUT
RES
VWRQ
DO
DI
CL
CE
TIN2 F
TIN1 E
FIN2 B
FIN1 A
TDO
FDO
SPDO
SLDO
CONT5
CONT4
VDD5
LCHO
80
79
75
20
5
1
MUTE
2
30
VREF
REG_IN
REG_OUT
29
9
7
22
24
41
47
46
38
VVDD
77
10
VREF
11
9
8
7
6
25
21
20
14
15
26
5
11 10
11
8
10 9
6
7
4
5
2
3
1
61
62
63
69
57
56
55
51
50
43
44
40
37
19
6
28
26
25
23
22
21
27
4
12
19
3
1
2
+7V (+B5)
DGND
L-CH
1
5
6
4
AGND
R-CH
3
2
42
RCHO
45
68
64
65
66
DRF
67
48
49
ADAVDD
18
~
~
+
–
–
+
+5V
E
VCC
VC
C
A
B
C
F
LD
MD
DISC
UP/DOWN
UP/DOWN
OPEN/CLOSE
SW401
SW402
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