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ViewSonic Corporation
Confidential - Do Not Copy
VG720
4.4 INTRODUCTION OF IC
STUM56AK(U401):
integrate ADC, OSD, SCALER, MCU, LVDS, convert analog RGB
into digital and room and shrink scaling output to LCD panel.
PIN Function:
AIC1084-33PM (U702):
DC power convert, used to 5v convert 3.3v.
LT1117-18(U701):
DC power convert, used to 5v convert 3.3v.
Pin Symbol
Description
70
SDO
SPI flash serial data output; Input w/5V-tolerant
71
CSZ
SPI flash chip select; output
72
SCK
SPI flash serial select; output
73
SDI
SPI flash serial data input; output
65
DDCA_SDA/RS232_TX DDC data for analog interface; 4mA driving
strength/UART transmitter/GPIO; I/O w/5V-tolrant
66 DDCA_SDA/RS232_RX DDC data for analog interface/UART
transmitter/GPIO;Input w/5V-tolrant
36
DDCD_SDA
DDC data for DVI interface; 4mA driving strength;
I/O w/5V-tolerant
37
DDCD_SCL
DDC clock for DVI interface; Input w/5V-tolerant
19
RST
Chip reset; High reset; Input w/5V-tolerant
22
RSTN
Chip reset; Low reset; Input w/5W-toerant
11 VCTRL
Regulator
control;
Output
63 HSYNCO
Analog
HSYNC
input
64 VSYNCO
Analog
VSYNC
input
62
REFP
Internal ADC top de-coupling pin
61
REFM
Internal ADC bottom de-coupling pin
51 REXT
External resistor 390 ohm to AVDD
_
DVI
21
PWM1
PWM1; 4mA driving strength; Output
29
PWM0
PWM0; 4mA driving strength; Output
4 BYPASS
For
External
Bypass
Capacitor
33
XIN
Xin; Crystal Oscillator Input
34
XOUT
Xout; Crystal Oscillator Output
44
、
50 AVDD
_
DVI
DVI Power 3.3V
60
AVDD
_
ADC
ADC Power 3.3V
52
AVDD
_
PLL
PLL Power 3.3V
34
AVDD
_
MPLL
MPLL Power 3.3V
14
、
67
、
95
、
103
、
115
VDDP
Digital Output Power 3.3V
13
、
38
、
41
、
47
、
96
、
116
VDDC Digital
Core
Power
1.8V
Содержание VG720 - 17" LCD Monitor
Страница 37: ...37 ViewSonic Corporation Confidential Do Not Copy VG720 Sep2 Inpute the S N and execute Enter...
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Страница 39: ...39 ViewSonic Corporation Confidential Do Not Copy VG720 Sep3 Key the Enter and write the data...
Страница 40: ...40 ViewSonic Corporation Confidential Do Not Copy VG720 Sep4 If ddc program OK and show data compare ok...
Страница 41: ...41 ViewSonic Corporation Confidential Do Not Copy VG720 5 7 Packing For Shipping...
Страница 43: ...43 ViewSonic Corporation Confidential Do Not Copy VG720 6 Troubleshooting Flow Chart...
Страница 61: ...61 ViewSonic Corporation Confidential Do Not Copy VG720 8 Exploded Diagram And Spare Parts List...
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Страница 66: ...66 ViewSonic Corporation Confidential Do Not Copy VG720 Picture 9 Picture 10 Picture 11 Picture 12 Picture 13...
Страница 79: ...79 ViewSonic Corporation Confidential Do Not Copy VG720 12 PCB Layout Diagram 12 1 MAIN BOARD PCB TOP VIEW...
Страница 80: ...80 ViewSonic Corporation Confidential Do Not Copy VG720 12 2 MAIN BOARD PCB BUTTON VIEW...
Страница 81: ...81 ViewSonic Corporation Confidential Do Not Copy VG720 12 3 KEYBOARD TOP VIEW 12 4 KEYBOARD BUTTON VIEW...
Страница 82: ...82 ViewSonic Corporation Confidential Do Not Copy VG720 12 5 POWER PCB TOP VIEW...
Страница 83: ...83 ViewSonic Corporation Confidential Do Not Copy VG720 12 6 POWER PCB BUTTON VIEW...
Страница 84: ...84 ViewSonic Corporation Confidential Do Not Copy VG720 12 6 AUDIO PCB TOP VIEW...
Страница 85: ...85 ViewSonic Corporation Confidential Do Not Copy VG720 12 6 AUDIO PCB BUTTON VIEW...