LG CRD-8402B, Service Manual

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16
Pin No. Symbol I/O Description
38 FE I Focus Error Input
39 VC I Center voltage Input
40 VPCO1 O 1,Z,0 Output of VCO2 for wide-Band EFM PLL
41 VCTL I Input of VCO2 Control voltage for Wide-Band EFM PLL
42 FILO O Analog Filter Output for Master PLL (Slave = Digital PLL)
43 FILI I Filter Input for Master PLL
44 PCO O 1,Z,0 Change Pump Output for Master PLL
45 CLTV I Multiplier VCO Control Voltage Input
46 AVS1 Analog GND
47 RFAC I EFM Signal Input
48 BIAS I Asymmetry Circuit Constant Current Input
49 ASYI I Asymmetry Comparator Voltage Input
50 ASYO O 1,0 EFM Full-Swing Output (L=V
SS
, H=V
DD
)
51 AVD1 Analog Power Supply (2.5V)
52 ADC1 Digital Power Supply (2.5V)
53 ADC2 Digital Power Supply (2.5V)
54 VSC1 Digital GND
55 VSC2 Digital GND
56 FOK I/O 1,0 Focus OK Signal IN/OUT
57 MIRR I/O 1,0 Mirror Signal IN/OUT
58 COUT I/O 1,0 Track Number Count Signal IN/OUT
59 GFS O 1,0 GFS Output
60 SCOR O 1,0 Outputs a high signal when either subcode S0 or S1 is detected
61 SQSO O 1,0 SubQ 80bit PCM Peck and Level Data 16bit Output
62 SQCK I SQSO Readout clock Input
63 SENS O 1,Z,0 SENS Output to Sub CPU
64 SCLK I Sens Serial Data Readout Clock Input
Set to high when not used.
65 MUTE I DSP Mute (High:ON, Low:OFF)
66 DRV
DD
Internal DRAM Exclusive Power Supply
67 DRV
SS
Internal DRAM Exclusive GND
68 F16M O 1,0 1/2 Division of XTLI
Not changes with variable pitch.
69 XWAT O 1,0 Wait Signal for Sub CPU Buffer Memory Access, Negative Logic
70 XINT O 1,Z,0 Interrupt Signal to Sub CPU, Negative Logic
71 VDIO1 Digital Power Supply (3.3V)
72 VSIO1 Digital Power Supply GND
73 VSIO2 Digital Power Supply GND
74 XCS I Chip Select Signal from Sub CPU, Negative Logic