Samsung MAX-557 - Page 6

3. Basic circuit operation
3-1. CD section
3-1-1. KA9220 (RF + SSP) : WICO1
Description
1 AVEE(R) Analog negative power supply input pin for RF part.
2 CPH Capacitor connection pin of mirror hold.
3 CBH Capacitor connection pin of defect bottom-hold
4 TESTD Defect test pin
5 TESTM Mirror test pin
6 Test Input pin for test
7 PFSET Peak frequency setting pin for focus, tracking compensation and fc (cut off frequency)
of CLV LPF
8 SSTOP Check the position pin of pick-up whether inside or not.
9 DIRC Direct 1 Track Jump Control Pin
10 AVCC Analog positive power supply input pin for SERVO part.
11 WDCH Auto-sequencer clock-input pin(Normal speed = 88.2KHz, Double speed=176.4KHz)
12 SMPD Connection pin of DSP SMPD
13 SMON Connection pin of DSP SMON, spindle servo ON at "H"
14 N/C No connection pin
15 TGSW Providing time constant to change the high frequency tracking gain
16 RTG Capacitor connection pin to switch the tracking gain of high frequency
17 LFR Capacitor connection pin to perform rising low bandwidth of focus servo Joop
18 FSW High frequency gain of focus servo loop can be changed by FS3 switch ON or OFF
19 HFGD Reducing high frequency gain with capacitor connected between pin 18 and pin 19.
20 FSCH Time constant external pin to generate focus search waveform
21 VREG! External regulator voltage input pin for VCO
22 ISET Determining the peak value of focus search,track jump and SLED kick
23 VREG 3.5V Regulator output pin
24 FVC Pin connected external resistor to adjust free running frequency of VCO
25 SMEF 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 u-com
28 MLT Latch input pin from p-com
29 MDAT Data input pin from u-com
30 RESET Reset input pin from u-com, 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 Analog negative power supply input pin for SERVO part
35 APDI Input pin of DSP phase comparison output (PHAS)
36 F8M Output pin of analog VCO
Normal speedc= 8.64 MHz, Double speed = 17.28MHz
37 AASC Auto-Asymmetry control input pin
38 EFMO EFM Comparator output pin
39 SLEN Non-inverting input pin of SLED SERVO amplifier
40 SLEO 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 Inverting input pin of spindle servo amplifier
44 SPDLO Spindle servo amplifier output pin
45 FCE Invering input pin of focus servo complifier.
46 FSEO Output pin of focus sevoe amplifier
47 TKEI Non-inverting input pin of tracking servo amplifier
48 TKEO Output pin of tracking servo amplifier
49 N/C No connection
50 ATS Anti-shock input pin
MAX-557
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