Sharp CDC2900 Service Manual - Page 17

Lc78622ne, Servo/signal, Control, La9241m, Servo Amp., To Main To Ic601, To Main,

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Page 17 highlights

CD-C622/C2900 Figure 17 BLOCK DIAGRAM (1/3) - 17 - PICKUP UNIT FOCUS COIL TRACKING COIL M2 SLED MOTOR M M1 SPINDLE MOTOR M PICKUP IN SW4 TO FD SPO NC SLD SL- SL+ DRF CL DAT CE ~ ~ VVDD VDD LVDD RVDD XVDD +5V Q1 Q52 +B1 62 64 LD0 VCC1 22 1 FIN2 2 FIN1 3E 4F IC1 LA9241M SERVO AMP. JP- 32 CV+ 40 SLC 43 SL1 44 15 16 27 23 29 30 31 54 51 52 53 +5V XL1 45 44 XIN XOUT 6 23 36 41 43 31 2 IC2 4 LC78622NE LCHO 37 8 SERVO/SIGNAL LVSS 38 11 9 EFMO CONTROL RVSS 39 RCHO 40 10 EFMIN 12 CLV+ 27 20 JP- CONT1 24 RES. CQCK. COIN CONT2 25 SQOUT. RWC. WRQ 51 62 ~ 64 53 ~ 58 26 33 38 39 46 BI1B 2 1 Q51 CL, DAT, SELIAL CONTROL/CE CNP99 3 2 +5V 1 BI1A 2 1 1 2 3 4 5 6 CNP11 TO MAIN SECTION (TO IC601) 1 2 7 20 25 23 SL+. SL-. DRF 42 41 6 7 4 5 IC3 M63001FP FOCUS/ TRACKING/ 20 40 24 18 28 15 SPIN/SLED 39 16 DRIVER 38 26 37 27 36 8 ~ 14 21 22 29 ~ 35 +B1 +B5 PU-IN SW 10 GND (D) 10 9 MECHA UP 9 8 GND (D) 8 7 DISK NO. 7 6 OPEN/CLOSE 6 5 GND (D) 5 4 M- 4 3 M+ 3 2 GND (M) 2 1 1 CNP10 CNS10 SW2 MECHA UP SW3 DISC No. SW1 OPEN/CLOSE M M3 LOADING SOLM1 TO MAIN SECTION +4.3V REGULATOR Q81 +7.3V (B1)

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– 17 –
CD-C622/C2900
Figure 17 BLOCK DIAGRAM (1/3)
27
1
2
3
4
1
8
6
7
18
24
40
20
4
5
15
23
16
26
27
7
2
25
20
29
21
22
35
14
38
39
28
41
42
37
36
PU-IN SW
XL1
XIN
LD0
FIN2
JP–
CV+
SLC
SL1
FIN1
E
F
TO
FD
SPO
NC
SLD
SL–
SL+
DRF
CL
DAT
CE
VCC1
6
+5V
PICKUP IN
SW4
FOCUS COIL
TRACKING COIL
M1
SPINDLE
MOTOR
M
M
M2
SLED
MOTOR
PICKUP UNIT
9
IC2
LC78622NE
SERVO/SIGNAL
CONTROL
+B1
IC3
M63001FP
FOCUS/
TRACKING/
SPIN/SLED
DRIVER
IC1
LA9241M
SERVO AMP.
RES. CQCK. COIN
SQOUT. RWC. WRQ
~
~
~
CL, DAT, SELIAL CONTROL/CE
Q51
SL+. SL–. DRF
9
8
7
6
5
4
3
2
1
GND (D)
MECHA UP
GND (D)
DISK NO.
OPEN/CLOSE
GND (D)
M–
M+
GND (M)
9
8
7
6
5
4
3
2
1
CNP10
M
+5V
+B1
62
64
45
36
23
43
37
31
38
39
40
24
25
10
1
2
2
1
3
3
2
1
4
5
6
10
26
58
53
10
12
20
32
40
43
44
53
52
51
54
31
30
29
23
27
16
15
41
44
Q1
Q52
+4.3V
Q81
+7.3V (B1)
REGULATOR
TO MAIN SECTION
(TO IC601)
XOUT
EFMO
EFMIN
CLV+
JP–
CONT2
CONT1
LCHO
LVSS
RVSS
RCHO
VVDD
VDD
LVDD
RVDD
XVDD
SW1
OPEN/CLOSE
SW2
MECHA UP
SW3
DISC No.
M3
LOADING
SOLM1
TO MAIN
SECTION
CNS10
+B5
~
~
CNP11
BI1B
2
1
BI1A
CNP99
+5V
2
4
8
33
38
39
46
~
64
62
51
11
22