Sharp CD-C440W Service Manual page 45

IC1 VHiLA9240M/-1:Servo Amp. (LA9240M) (2/2)
Pin No. Port Name
51 CL
52 DAT
53 CE
54 DRF
55 FSS
56 VCC2
57 REFI
58 VR
59 LF2
60 PH1
61 BH1
62 LDD
63 LDS
64 VCC1
VCC1
64
FIN2 1
FIN1 2
I/V
E 3
4
F
5
TB
6
TE-
7
TE
8
TESI
9
SCI
T.SERVO & T.LOGIC
10
TH
11
TA
12
TD-
13
TD
14
JP
15
TO
16
FD
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. (± 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.
LDS LDD BH1 PH1
63 62 61 60
APC
VCA
BAL VCA
TE
F.SERVO & F.LOGIC
17 18
FD- FA
Figure 45 BLOCK DIAGRAM OF IC
Function
LP2 VR REFI
59 58 57
REF
RF DET
µ-COM
INTER FACE
SPINDLE SERVO
19 20 21 22 23 24
FA-
FE FE- AGND SP SPI
– 45 –
CD-C440W/CP-C440W
VCC2 FSS DRF CE DAT CL CLK
56 55 54 53 52 51 50
SLC
RF AMP
SLED SERVO
25 26 27 28 29 30
SPG SP- SPD SLEQ SLD SL- SL+
DEF
49
48 NC
47 TBC
46 FSC
45 DGND
44
SLI
43 SLC
42 RFS-
41 RFSM
40 CV+
39 CV-
38 SLOF
37
HFL
36 TES
35 TOFF
34 TGL
33 JP+
31 32
JP-