Sharp CD-BK250W Service Manual

– 17 –
CD-BK250W/CD-BK2600W/CD-BK270W
Figure 17 BLOCK DIAGRAM (1/3)
+5V
CNS4
BI4
CNP4
M3
T/T UP DOWN
LOADING
+3.3V
TO DISPLAY SECTION
TO MAIN SECTION
CONSTANT
VOLTAGE
Q2
LASER
DRIVER
+3.3V
+3.3V
Q1
+5V
PICK UP UNIT
IC1
LC78645E
CD SERVO
VVDD LDD LDS
M
SW3
DISC
NUMBER
SW2
CLAMP
SW1
OPEN/
CLOSE
CNP8
CNP7
TRACKING COIL
FOCUS COIL
SW4
PICKUP
IN
M2
SLED
MOTOR
M1
SPINDLE
MOTOR
M
M
R-CH
Q3
XVDD RVDD LVDD ADAVDD RFVDD
XL1
33.8688MHz
OC. DISC NO CLAMP SW CD RES CLK DI DO CE DRF WRQ
+5(+B5) +5(+B5)
DGND L-CH
AGND
VCC3
VCC2
VCC4
VCC1
IC2
M63001FP
FOCUS/TRACKING/
SPIN/SLED
DRIVER
XIN
XOUT
RES
WRQ
DO
DI
CLK
CE
TIN2 TIN1 FIN2 FIN1
TD0
FD0
SPDO
SLDO
CONT5
CONT2 CONT3 CONT4
RCHO
RVSS
LVSS
LCHO
80
42
79
75
20
5
40
18
24
23
14
8
21
22
29
35
41
47
46
7
10
987
15
12
17 25
42
41 8339
4765
16
82
26 27
316452
316452
316452
54
71
61
62
63
69
57
56
55
51
50
40
37
19
28
26
23
22
21
3271689
615432
4543 44 25 70
64
65
66
48
49
18

Sharp CD-BK250W Specifications

General

Brand	Sharp
Model	CD-BK250W
Category	Stereo System
Language	English