Sharp CD-C602 Service Manual page 34

CD-C602,CP-C602
IC1 VHiLA9241M/-1: Servo Amp., (LA9241M) (2/2)
Pin No.
Port Name
49 DEF Defect detection output pin of disc.
50 CLK Reference clock input pin. 4.23MHz of DSP is input.
51 CL Microcomputer command clock input pin.
52 DAT Microcomputer command data input pin.
53 CE Microcomputer 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 disc.
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.
IC5 VHiM56748FP-1: Focus/Tracking/Spin/Slide Driver (M56748FP)
36 35 34 33
15K 15K
23K
25K
Stand
OP1
by
TSD
OP1
OP1
1 2 3 4
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32 31 30 29
28
10K
PA
PA
10K
10K
PA PA
10K
5 6 7 8 9
Figure 34 BLOCK DIAGRAM OF IC
– 34 –
Function
GND
27 26 25 24
PA
PA
PA PA
10 12 13
11
GND
23 21 20 19
OP1
10K 10K
Vcc
OP1
10K
OP1
10K
14 15 17 18
16
3.6K
10.8K