LG HT353SD Manual De Servicio página 36

1. IC501 MPEG(MT1389L)
• DESCRIPCIÓN DE PINS
• Abbreviations:
SR: Slew Rate
PU: Pull Up
PD: Pull Down
SMT: Schmitt Trigger
4mA~16mA: Output buffer driving strength.
Pin Main
125 RFIP
126 RFIN
127 RFG
128 RFH
1 RFA
2 RFB
3 RFC
4 RFD
5 RFE
6 RFF
7 AVDD18_2
8 AVDD33_1
9 XTALI
10 XTALO
11 AGND33
12 V20
13 V14
14 REXT
15 MDI1
16 MDI2
17 LDO1
18 LDO2
19 AVDD33_2
20 DMO
21 FMO
22 TRAY_OPEN
23 TRAY_CLOSE
24 TRO
25 FOO
26 FG
27 USB_DP
28 USB_DM
29 VDD33_USB
30 VSS33_USB
31 PAD_VRT
32 VDD18_USB
95 DACVDDC
96 VREF
97 FS
98 DACVSSC
99 CVBS
Copyright © 2008 LG Electronics. Inc.Todos los derechos reservados.
Sólo con fines de capacitación y mantenimiento
Alt. Type
Analog I nterface (66)
Analog Input
OPOUT Analog Input
OPINP Analog Input
OPINN Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog Input
Analog power
Analog power
Input
Output
Analog Ground
Analog output
Analog output
Analog Input
Analog Input
Analog Input
Analog Output
Analog Output
Analog Power
Analog Output
Analog Output
Analog Output
Analog Output
Analog Output
Analog Output
GPIO2 Analog
Analog Input
Analog Input
USB Power
USB Ground
Analog Inout
USB Power
Power
Analog
Analog
Ground
Analog
Description
AC coupled DVD RF signal input RFIP
AC coupled DVD RF signal input RFIN
Main beam, RF AC input path
Main beam, RF AC input path
RF main beam input A
RF main beam input B
RF main beam input C
RF main beam input D
RF sub beam input E
RF sub beam input E
Analog 1.8V power
Analog 3.3V power
27MHz crystal input
27MHz crystal output
Analog Ground
Reference voltage 2.0V
Reference voltage 1.4V
Current reference input. It generates reference current for
RF path. Connect an external 15K resistor to this pin and
AVSS
Laser power monitor input
Laser power monitor input
Laser driver output
Laser driver output
Analog 3.3V power
Disk motor control output. PWM output
Feed motor control. PWM output
Tray PWM output/Tray open output
Tray PWM output/Tray close output
Tracking servo output. PDM output of tracking servo
compensator
Focus servo output. PDM output of focus servo
compensator
1) Motor Hall sensor input
2) GPIO
USB port DPLUS analog pin
USB port DMINUS analog pin
USB Power pin 3.3V
USB ground pin
USB generating reference current
USB Power pin 1.8V
Power
Bandgap reference voltage
Full scale adjustment (suggest to use 560 ohm)
Ground pin for video DAC circuitry
Analog composite output
2-27 Sólo para uso interno de LGE