LG RCT689H, Service Manual

Page: 162 / 165

5-43
Pin Pin Name I/O Connection Description
Number
Target
117 SH1 I/O FEP Sample timing signal for ROPC space detection, APC space
detection, and read power detection
118 SH2 I/O FEP Sample timing signal for PCA peak, bottom detection, APC peak
detection, and mean valuer detection
119 SH3 I/O FEP Sample timing signal for PCA mean value detection, APC space
detection, and read power detection, and erase detection
WIDGT VFO punch out signal
120 SH4 I/O FEP ROPC mark detection sampling signal
P24 - General-purpose I/O (GIO/TxD1)
121 WTGT O FEP Write gate
122 BDO I FEP Dropout signal input
123 VDD3 Power supply Power supply I/O pad VDD (3.3V)
124 VSS GND GND Digital Vss
125 VDD12 Power supply Power supply Internal logic VDD (1.2V)
126 OFTR I FEP Off track signal input
127 TC I FEP Track crossing signal input
128 VREFH I FEP 2.2V reference voltage input
129 RVI I/O Res. Fixed current source for LVDS, WBL, and analog blocks
130 AVSSD1 GND GND WOBBLE analog Vss
131 CPOP2 I/O Cap. Res. Filter connection pin for wobble PLL
132 CPOP1 I/O Cap. Res. Filter connection pin for wobble PLL
133 AVDD33DI Power supply Power supply WOBBLE analog VDD (3.3V)
134 SE02 I FEP Error signal output after selection, analog input
135 SE01 I FEP E rror signal output after selection, analog input
136 AVSSA GND GND Servo analog-to-digital converter analog Vss
137 AVDD33A Power supply Power supply Servo analog-to-digital converter analog VDD (3.3V)
138 CDA1 O Cap Smoothing capacitance for DRC-VCO
139 REFTOP O Cap Analog-to-digital converter reference voltage for DRC (TOP)
140 REFBTM O Cap Analog-to-digital converter reference voltage for DRC (BOTTOM)
141 REGDRC O Cap DRC analog-to-digital converter analog VDD (1.2V)
Internal regurator output
142 EQOUTB I FEP RF differential signal (NEG)
143 EQOUTA I FEP RF differential signal (POS)
144 AVDD33DRC Power supply Power supply DRC analog-to-digital converter analog VDD (3.3 V)