![background image](http://html1.mh-extra.com/html/viewsonic/va1721wmb-17-lcd-monitor/va1721wmb-17-lcd-monitor_service-manual_1020659017.webp)
- 17 –
ViewSonic Corporation
Confidential - Do Not Cop
VA1721wmb
4.4 INTRODUCTION OF IC
TSUM16AK(U401):
integrate ADC, OSD, SCALER, MCU, LVDS, convert analog RGB
into digital and room and shrink scaling output to LCD panel.
PIN Function:
AP1084K32LA(U702):
DC power convert, used to 5v convert 3.3v.
Pm25LV512A/010A/020/040(U402):
The PM25LV010 are 512 Kbit/1 Mbits/2 Mbit/4
Mbit3.0 Volt-only Serial Peripheral Interface(SPI) Flash memories. The devices
are designed to support 33MHz fastest clock rate in the industry in normal read
mode, 100MHz in fast read mode and the bottom 4Kbyte sector into four smaller
1 Kbyte sectors features(except Pm25LV512A), The devices use a single low
voltage, ranging from 2.7 Volt to 3.6 Volt, power supper to perform read, erase
and program operations. The devices can be programmed in standard EPROM
programmers as well.
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
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
_
ADC
21
PWM1
PWM1; 4mA driving strength; Output
29
PWM0
PWM0; 4mA driving strength; Output
4
BYPASS
For External Bypass Capacitor
32
XIN
Xin; Crystal Oscillator Input
33
XOUT
Xout; Crystal Oscillator Output
44
、
50
、
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
12
、
68
、
97
、
117
VDDC
Digital Core Power 1.8V
Содержание VA1721wmb - 17" LCD Monitor
Страница 22: ...22 ViewSonic Corporation Confidential Do Not Cop VA1721wmb Block Diagram...
Страница 36: ...36 ViewSonic Corporation Confidential Do Not Cop VA1721wmb...
Страница 37: ...37 ViewSonic Corporation Confidential Do Not Cop VA1721wmb Sep2 Inpute the S N and execute Enter...
Страница 38: ...38 ViewSonic Corporation Confidential Do Not Cop VA1721wmb...
Страница 39: ...39 ViewSonic Corporation Confidential Do Not Cop VA1721wmb Sep3 Key the Enter and write the data...
Страница 40: ...40 ViewSonic Corporation Confidential Do Not Cop VA1721wmb Sep4 If ddc program OK and show data compare ok...
Страница 41: ...41 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 5 7 Packing Procedure...
Страница 42: ...42 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 6 Troubleshooting Flow Chart...
Страница 55: ...55 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 8 Exploded Diagram And Spare Parts List...
Страница 56: ...56 ViewSonic Corporation Confidential Do Not Cop VA1721wmb Packing For Shipping...
Страница 60: ...60 ViewSonic Corporation Confidential Do Not Cop VA1721wmb Picture 19...
Страница 61: ...61 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 10 Block Diagram...
Страница 70: ...70 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 12 PCB Layout Diagram 12 1 MAIN BOARD PCB TOP VIEW...
Страница 71: ...71 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 12 2 MAIN BOARD PCB BUTTON VIEW...
Страница 72: ...72 ViewSonic Corporation Confidential Do Not Cop VG1721wm VA1721wm 12 3 POWER PCB TOP VIEW...
Страница 73: ...73 ViewSonic Corporation Confidential Do Not Cop VG1721wm VA1721wm 12 4 POWER PCB BUTTON VIEW...
Страница 74: ...74 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 12 5 KEY BOARD TOP VIEW 12 6 KEY BOARD BUTTON VIEW...
Страница 75: ...75 ViewSonic Corporation Confidential Do Not Cop VA1721wmb 12 7 POWER PCB TOP BUTTON VIEW Q...