Samsung RCD-750 - Page 23

Pin No. Symbol Vo Description
20 FSCH 0 Time constant external pin to generate focus search waveform
21 VREGI l External regulator voltage input pin for VCO
22 ISET Determing the peak value of focus search, track jump and SLED kick
23 VREG oO 3.5V Regulator output pin
24 FVC I Pin connected external resistor to adjust free running frequency of VCO
25 SMEF I Providing an external LPF time constant of CLV SERVO Loop
26 BPF | Providing time constant for Loop filter of VCO
27 MCK | Clock input pin from micom
28 MLT I Latch input pin from micom
29 MDAT | Data input pin from micom
30 RESET | Reset input pin from micom, reset at "L"
31 LOCK Pin for operation of the sled runaway prevention function at "L"
32 TRCNT Track count output pin
33 ISTAT Internal status output pin
34 AVEE (S) Analog negative power supply input pin for SERVO part
35 APDI I Input pin of DSP phase comparison output (PHAS)
36 F8M oO Output pin of analog VCO
Normal speed = 8.64 MHz, Double speed = 17.28MHz
‘37 AASC Auto-Asymmetry control input pin
38 EFMO oO EFM comparator output pin
39 SLEN I Non-inverting input pin of SLED SERVO amplifier
40 SLEO oO Output pin of SLED SERVO amplifier
41 SLEI | . Inverting input pin of SLED SERVO amplifer
42 TEST2 Test input pin to change speed mode
Normal speed = "H", Double speed = "L"
43 SPDI I Inverting input pin of spindle servo amplifier
44 SPDLO O Spindle servo amplifier output pin
45 FCE | Invering input pin of focus servo complifier.
46 FSEO 0 Output pin of focus sevoe amplifier
47 TKEI | Non-inverting input pin of tracking servo amplifier
48 TKEO O Output pin of tracking servo amplifier
49 N/C No connection
50 ATS | Anti-shock input pin
51 TZC I Tracking Zero Grossing input
RCD-750
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