Service manual
CD-C471
W
ICl
VHiLA9241
M/-l
:Servo
Amp.,(LA9241
M)
(2/2)
Pin No.
Port Name
Function
51
CL
52
DAT
53
CE
54
DRF
55
FSS
56
vcc2
57
REFI
58
VR
59
LF2
60
PHl
61
BHl
62
LDD
63
LDS
64
VCCl
Micro computer command clock input pin.
Micro computer command data input pin.
Micro computer command chip enable input pin.
(DETECT RF) RF level detection output.
(Focus
Serch
Select) Pin to switch focus search mode.
(rt
search/+ search for reference voltage)
VCC pin for servo system and digital system.
Pin to connect pass control for reference voltage.
Reference voltage output pin.
Pin to set defect detection time constant of disk.
Pin to connect capacitor for peak hold of RF signal.
Pin to connect capacitor for bottom hold of RF signal.
APC circuit output pin.
APC circuit output pin.
RF system VCC pin.
FE-
BAL
-
VCA
’
-
TSERVO
&
T.LOGIC
F.SERVO
&
F.LOGIC
IF
SPINDLE SERVC
)
1
I I
iLED
SERVC
Figure 47 BLOCK DIAGRAM OF
IC