ViewSonic Vx2235wm 5 Service Manual

							
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Control Explanation
Setup Menu displays the menu shown below:
Language  Select allows the user to choose th e language used in the menus and 
control screens.
Resolution Notice  allows the user to enable or disable this notice.
If you enable the Resolution Notice show n above and your computer is set at a 
resolution other than 1680 x 1050,  the following screen appears.
OSD Position  allows the user to move the OSD menus and control screens.
OSD Timeout  sets the length of time the OSD  screen is displayed. For example, 
with a “30 second” setting,  if a control is not pushed within 30 seconds, the 
display screen disappears.
OSD Background  allows the user to turn the OSD background On or Off.
Memory Recall  returns the adjustments back to fa ctory settings if the display is 
operating in a factory Preset Timing Mode listed in the Specifications of this 
manual. 
						

							
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4. Circuit Description 
1.RTD 2553V 
Realtek RTD2553V series products are all-in-one LCD m onitor controllers supporting UXGA / WSXGA+ / WXGA+ / SXGA 
(optional), and integrate Realtek high performance ADC, TMDS Rx(optional),scaling engine, OSD engine, LVDS Tx,    RSDS 
Tx and so on. Moreover, all products are pin compatible in QFP128-pin package to save cost and make the design easier. 
 
 
 
2. RTD2120 
This chip is the micro-processor of LCD monitor. It uses the  design ware DW8051 of Synopsys as the 8051 core of this chip 
and is compatible with other industry 8051 series. Also, 96Kb yte FLASH with 8 bit bus is embedded in this chip which is 
licensed from TSMC 0.18um e-FLASH process. Here we use the package of PLCC44/LQFP48 if we would like to have a 
discrete MCU controller or we make a multi-chip package with our LCD monitor controller to form one chip package to save 
the cost of package and PCB material. 
 
  
						

							
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5. Adjustment Procedure 
A. Function Test and Alignment Procedure 
1. All Modes Reset 
You should do “All Model Reset” (Refer to Chap 3. Hot Ke ys for Function Controls) first. This action will allow 
you to erase all end-user’s settings and restore the factory defaults. 
  2. Auto  Image Adjust   The Auto Adjust is aimed to offer a  best screen quality by built-in ASIC.  For optimum screen quality, the user 
has to adjust each function manually.  A.Turn the computer and LCD monitor on. 
B. Press the ‘ Auto’ button on monitor keypad to Auto Adjust. 
C. The LCD monitor will start the Auto Adjust process  automatically and run for 10 consecutive seconds, during 
which time you will notice the image change. 
3. Firmware  Test Patten: Burn in Model (Refer to Chap3. Hot Keys for Function Control) 
-Make sure the F/W is the latest version. 
 
4. DCC Test Patten: EDID program 
-Make sure it can pass test program. 
  5. Window Shut Down Test Signal: 1280*1024@60Hz
 
Test Pattern:   
 
Checkered Pattern Every One Pixel (50%Green & 50%Blue) 
Inspection Item: Flicker, Mura 
  6. Window BG Test Signal: 1280*1024@60Hz
 
Test Pattern:   
 
Window standard pattern 
Inspection Item: Line Defect, Function Defect & Mura 
7. 25 Gray 
Test Signal: 1280*1024@60Hz
 
Test Pattern:   
 
Full Screen 25% White (Gray) 
Inspection Item: Particle, Line Defect & Mura 
  8. 50 Gray Test Signal: 1280*1024@60Hz
 
Test Pattern:   
 
Full Screen 50% White (Gray) 
Inspection Item: Bright Dot, Pa rticle, Line Defect & Mura 
  9. White Box Test Signal: 1280*1024@60Hz
 
Test Pattern:   
 
Window standard pattern 
Inspection Item: Particle, Line Defect, Power, Image Remain & Mura  
						

							
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10. Black Box 
Test Signal: 1280*1024@60Hz
 
Test Pattern:   
 
Window standard pattern 
Inspection Item: Bright Dot, Line Defect & Power 
  11. RED 
Test Signal: 1280*1024@60Hz
 
Test Pattern:   
 
Full Screen Red   
Inspection Item: Bright Dot,  Partial & Line Defect 
 
12. Green 
Test Signal: 1280*1024@60Hz
 
Test Pattern:   
 
Full Screen Green 
Inspection Item: Bright Dot,  Partial & Line Defect 
  13. Blue 
Test Signal: 1280*1024@60Hz
 
Test Pattern:   
 
Full Screen Green 
Inspection Item: Bright Dot,  Partial & Line Defect 
  14. Gray_Scale_0-100_V64 
Test Signal: 1280*1024@60Hz
 
Test Pattern:   
 
Vertical 64 (256) Gray Scale (Right  → Left ，From 0 to 100% White) 
Inspection Item: Line Defect & Function Defect   
 
  15. Function Test Display pattern 
 
Item Pattern  Description  Remark 
1  Gray_Scale_0-100_V  Vertical 64 (256) Gray Scale (right
→left ，From 0 to 100% White) 
Figure 1 
2  Gray_Scale_0-100_H  Horizontal 64 (256) Gray Scale (up
→down ，From 0 to 100% White) 
Figure 2 
3 Black  Full Screen Black  Figure 3 
4  Red  Full Screen 50% Red  Figure 4 
5 Green  Full Screen 50% Green  Figure 5 
6  Blue  Full Screen 50% Blue  Figure6 
7 White Full Screen White Figure7 
8 Black_Tile  Black Tile Under White Background  Figure 8 
  
						

							
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Figure 1  Figure 2 
  
Figure 3  Figure 4 
  
Figure 5  Figure 6 
 
 
Figure 7  Figure 8 
 
  
   
						

							
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B  BIOS update procedure 
 
1. To setup ISP environment 
 
 
Hardware: 
PC or Notebook , Parallel(Prin ter) cable , ISP tool( Fig 1) 
 
Software: 
ISP driver .  
If the O.S. was Win2000 or Win XP please have to install
 
 
 
 
 
 
  PORT95NT.exe 
 
 
 
 
 
 
Fig1 
 
 
In order to ensure can execute ISP program,  please set BIOS in PC or Notebook as Fig 2 
  
						

							
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Fig 2 
  
						

							
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2.
 Install ISP 
 
 
2.1 User could download ISP driver and PORT95NT install file from Myson Century website( //www.myson.com.tw ) 
2.2 After extracting the zip file, the total files list as Fig  2.2, and double click the file of setup.exe to install. 
 
Fig 2.2 
 
 
2.3 Press  “Next ＂  button to continue., see Fig 2.3 
 
Fig 2.3 
  
						

							
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2.4 Keep default setting or press  “Change ＂  button for selecting the path that you want , and then press “Next ＂button to 
continue, see Fig 2.4. 
 
 
2.5 Press  “Install ＂  button to continue, see Fig 2.5 
 
Fig 2.5 
 
Fig24 
						

							
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2.6 The Installer Information shows package warning, press  “Ignore ＂  button to continue, see Fig 2.6. 
 
Fig 2.6 
 
2.7 Installation has finished, press  “Finish ＂  button, see Fig 2.7. 
 
Fig 2.7