Sharp CD-C5H Service Manual page 55

IC1 VHiLA9241M/-1:Servo Amp., (LA9241M) (2/2)
Port Name
Pin No.
51 CL
52 DAT
53 CE
54 DRF
55 FSS
56 VCC2
57 REFI
58 VR
59 LF2
60 PHI
61 BHI
62 LDD
63 LDS
64 VCC1
IC1 VHiLA9241M/-1:Servo Amp., (LA9241M)
VCC1
64
1
FIN2
2
FIN1
I/V
E 3
4
F
TB 5
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 BHI PHI
63 62 61 60
APC
VCA
BAL VCA
TE
F.SERVO & F.LOGIC
17 18
FD- FA
Figure 55 BLOCK DIAGRAM OF IC
Function
LF2 VR REFI
59 58 57
REF
RF DET
µ-COM
INTER FACE
SPINDLE SERVO
19 20 21 22 23 24
FA- FE FE-
SP SPI SPG
AGND
– 55 –
CD-C5H,CP-C5H
DRF
DAT
VCC2 CL
FSS CE CLK DEF
56 55 54 53 52 51 50
SLC
RF AMP
SLED SERVO
25 26 27 28 29 30 31
SPO SLEO SLD SL-
SP-
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+
32
SL+ JP-