Block Diagram Of Ic - Sharp CDC2900 - 3-CD Compact Stereo System Service Manual

CD-C622/C2900
IC1 VHiLA9241M/-1:Servo Amp.(LA9241M) (2/2)
Pin No. Port Name
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 REFI 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 PH1 Pin to connect capacitor for peak hold of RF signal.
61 BH1 Pin to connect capacitor for bottom hold of RF signal.
62 LDD APC circuit output pin.
63 LDS APC circuit output pin.
64 VCC1 RF system VCC pin.
VCC1 LDS
64 63
FIN2 1
FIN1 2
I/V
3
E
F 4
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
LDD BH1 PH1
62 61 60
APC
RF DET
VCA
BAL VCA
TE
F.SERVO & F.LOGIC
17 18 19
FD- FA FA-
Figure 48 BLOCK DIAGRAM OF IC
Function
LP2 VR REFI VCC2
59 58 57 56
REF
-COM
INTER FACE
SPINDLE SERVO
20 21 22 23 24 25 26
FE FE- AGND SP SPI SPG SP-
NC
– 48 –
FSS DRF CE DAT CL CLK DEF
55 54 53 52 51 50 49
SLC
RF AMP
SLED SERVO
27 28 29 30 31
SPD SLEQ SLD SL- SL+ JP-
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