– 45 –
CD-PC1881V
IC1 VHiLA9241M/-1:Servo Amp.(LA9241M) (2/2)
Pin No.
Port Name
Function
51
CL
Micro computer command clock input pin.
52
DAT
Micro computer command data input pin.
53
CE
Micro computer command chip enable input pin.
54
DRF
(DETECT RF) RF level detection output.
55
FSS
(Focus Serch Select) Pin to switch focus search mode. (
±
search for reference voltage)
56
VCC2
VCC pin for servo system and digital system.
57
REF1
Pin to connect pass control for reference voltage.
58
VR
Reference voltage output pin.
59
LF2
Pin to set defect detection time constant of disk.
60
PHI
Pin to connect capacitor for peak hold of RF signal.
61
BHI
Pin to connect capacitor for bottom hold of RF signal.
62
LDO
APC circuit output pin.
63
LDS
APC circuit output pin.
64
VCC1
RF system VCC pin.
Figure 45 BLOCK DIAGRAM OF IC
1
FIN2
FIN1
E
F
TB
TE-
TE
TESI
SCI
TH
TA
TD-
TD
JP
TO
FD
FD-
JP+
TGL
TOFF
TES
HFL
SLOF
CV-
CV+
RFSM
RFS-
SLC
SLI
DGND
FSC
TBC
NC
DEF
CLK
CL
DAT
CE
DRF
FSS
VCC2
REF1
VR
LF2
PHI
BHI
LDO
LDS
SLC
RF AMP
TE
F.SERVO & F.LOGIC
SPINDLE SERVO
SLED SERVO
VCC1
2
3
4
6
7
5
8
9
10
11
12
13
14
15
16
17
18
19
20 21
23
22
25 26
27
28
29
30 31
32
33
34
35
36
37
38
39
40
41
42
43
44
46
47
48
49
50
51
52
53
54
55
56
57
58
59
61
60
62
63
64
45
24
APC
RF DET
REF
VCA
VCA
INTER FACE
BAL
µ
-COM
I/V
T.SERVO & T.LOGIC
FA
FA-
FE FE-
AGND
SP SPI SPG SP-
SPO SLEO
SLO SL- SL+
JP-
