Service manual

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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/+ 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
DATCE
DRFFSS
VCC2
REF1VR
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
2322 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-