LG FFH-171A Manual page 20

PIN DESCRIPTION
Pin No. Symbol
1 MCP Capacitor connection pin for mirror hold
2 DCB Capacitor connection pin for defect Bottom hold
3 FRSH Capacitor connection pin for time constant to generate focus search waveform
4 DCC2 The input pin through capacitor of defect bottom hold output
5 DCC1 The output pin of defect bottom hold
6 FSET The peak frequency setting pin for focus, tracking servo and cut off frequency of CLV LPF
7 VDDA Analog ACC for servo part
8 VCCP VCC for post filter
9 GC2I Amplifier negative input pin for gain and low pass filtering of DAC output CH2
10 GC2O Amplifier output pin for gain and low pass filtering of DAC output CH2
11 CH2I The input pin for post filter channel2
12 CH2O The output pin for post filter channel2
13 CH1O The output pin for post filter channel1
14 CH1I The input pin for post filter channel1
15 GC1O Amplifier output pin for gain and low pass filtering of DAC output CH1
16 GC1I Amplifier negative input pin for gain and low pass filtering of DAC output CH1
17 RRC The pin for noise reduction of post filter bias
18 VSSP VSS for post filter
19 MUTEI The input pin for post filter muting control
20 ISET The input pin for current setting of focus search, track jump and sled okick voltage
21 VREG The output pin of regulator
22 WDCK The clock input pin for auto sequence
23 SMDP The input pin of CLV control output pin SMDP of DSP
24 SMON The input pin for spindle servo ON through SMON of DSP
25 SMEF The input pin of provide for an external LPF time constant
26 FLB Capacitor connection pin to perform rising low bandwidth of focus loop
27 FS3 The pin for high freqency gain change of focus loop with internal FS3 switch
28 FGD Reducing high freqency gain with capacitor between FS3 pin
29 LOCK Sled runaway prevention pin
30 TRCNT Track count output pin
31 ISTAT Internal status output pin
32 ASY The input pin for asymmetry control
33 EFM EFM comparator output pin
34 VSSA Analog VSS for servo part
35 MCK Micom clock input pin
Description
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