ViewSonic Vx2235wm4 Service Manual
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5. Adjustment Procedure 18 ViewSonic Corporation Confidential - Do Not Copy VX2235wm-4 1. Function Test 1.1 Product - 22” LCD Monitor 1.2 Test Equipment - Color Video Signal & Pattern (or PC with WSXGA+ resolution and a sound card) 1.3 Test Condition Before function test and alignmen t, each LCD Monitor should be run- in and warmed up for at least 30 minutes with the following conditions: (a) In room temperature, (b) With full-white screen, RGB, and Black (c) With cycled display modes, 640*480 (H=43.27kHz, V=85Hz) 800*600 (H=53.7kHz, V=85Hz) 1024*768 (H=68.67kHz, V=85Hz) 1680*1050 (H=64.7kHz, V=60Hz) 1.4 Test Display Modes & Pattern 1.4.1 Compatible Modes Analog Digital 1. 640 x 350 @ 70Hz, 31.5kHz 2. 640 x 400 @ 60Hz, 31.5kHz 3. 640 x 400 @ 70Hz, 31.5kHz 4. 640 x 480 @ 50Hz, 24.7kHz 5. 640 x 480 @ 60Hz, 31.5kHz 6. 640 x 480 @ 67Hz, 35.0kHz 7. 640 x 480 @ 72Hz, 37.9kHz 8. 640 x 480 @ 75Hz, 37.5kHz 9. 640 x 480 @ 85Hz, 43.27kHz 10. 720 x 400 @ 70Hz, 31.5kHz 11. 720 x 480 @ 60Hz, 31.5kHz 12. 720 x 576 @ 50Hz, 31.3kHz 13. 800 x 600 @ 50Hz, 24.7kHz 14. 800 x 600 @ 56Hz, 35.1kHz 15. 800 x 600 @ 60Hz, 37.9kHz 16. 800 x 600 @ 70Hz, 43 kHz 17. 800 x 600 @ 72Hz, 48.1kHz 18. 800 x 600 @ 75Hz, 46.9kHz 19. 800 x 600 @ 85Hz, 53.7kHz 20. 832 x 624 @ 75Hz, 49.7kHz 21. 1024 x 768 @ 50Hz, 39.6kHz 22. 1024 x 768 @ 60Hz, 48.4kHz 23. 1024 x 768 @ 70Hz, 56.5kHz 24. 1024 x 768 @ 72Hz, 58.1kHz 25. 1024 x 768 @ 75Hz, 60 kHz 26. 1024 x 768 @ 85Hz, 68.7 kHz 27. 1152 x 864 @ 75Hz, 67.5 kHz 28. 1152 x 870 @ 75Hz, 68.7 kHz 640 x 350 @ 70Hz, 31.5kHz 640 x 400 @ 60Hz, 31.5kHz 640 x 400 @ 70Hz, 31.5kHz 640 x 480 @ 50Hz, 24.7kHz 640 x 480 @ 60Hz, 31.5kHz 640 x 480 @ 67Hz, 35.0kHz 640 x 480 @ 72Hz, 37.9kHz 640 x 480 @ 75Hz, 37.5kHz 640 x 480 @ 85Hz, 43.27kHz 720 x 400 @ 70Hz, 31.5kHz 720 x 480 @ 60Hz, 31.5kHz 720 x 576 @ 50Hz, 31.3kHz 800 x 600 @ 50Hz, 24.7kHz 800 x 600 @ 56Hz, 35.1kHz 800 x 600 @ 60Hz, 37.9kHz 800 x 600 @ 70Hz, 43 kHz 800 x 600 @ 72Hz, 48.1kHz 800 x 600 @ 75Hz, 46.9kHz 800 x 600 @ 85Hz, 53.7kHz 832 x 624 @ 75Hz, 49.7kHz 1024 x 768 @ 50Hz, 39.6kHz 1024 x 768 @ 60Hz, 48.4kHz 1024 x 768 @ 70Hz, 56.5kHz 1024 x 768 @ 72Hz, 58.1kHz 1024 x 768 @ 75Hz, 60 kHz 1024 x 768 @ 85Hz, 68.7 kHz 1152 x 864 @ 75Hz, 67.5 kHz 1152 x 870 @ 75Hz, 68.7 kHz
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Analog Digital
29. 1280 x 720 @ 50Hz, 37.5 kHz
30. 1280 x 720 @ 60Hz, 45 kHz
31. 1280 x 768 @ 50Hz, 39.6 kHz
32. 1280 x 768 @ 60Hz, 47.8 kHz
33. 1280 x 768 @ 75Hz, 60.3 kHz
34. 1280 x 960 @ 50Hz, 49.4 kHz
35. 1280 x 960 @ 60Hz, 59.7 kHz
36. 1280 x 960 @ 75Hz, 75.2 kHz
37. 1280 x 1024 @ 60Hz, 64 kHz
38. 1280 x 1024 @ 75Hz, 80 kHz
39. 1400 x 1050 @ 60Hz, 65.3 kHz
40. 1400 x 900 @ 60Hz, 55.5 kHz
41. 1400 x 900 @ 75Hz, 75 kHz
42. 1600 x 1200 @ 60Hz, 75 kHz
43. 1680 x 1050 @ 60Hz, 64.7 kHz 1280 x 720 @ 50Hz, 37.5 kHz
1280 x 720 @ 60Hz, 45 kHz
1280 x 768 @ 50Hz, 39.6 kHz
1280 x 768 @ 60Hz, 47.8 kHz
1280 x 768 @ 75Hz, 60.3 kHz
1280 x 960 @ 50Hz, 49.4 kHz
1280 x 960 @ 60Hz, 59.7 kHz
1280 x 960 @ 75Hz, 75.2 kHz
1280 x 1024 @ 60Hz, 64 kHz
1280 x 1024 @ 75Hz, 80 kHz
1400 x 1050 @ 60Hz, 65.3 kHz
1400 x 900 @ 60Hz, 55.5 kHz
1400 x 900 @ 75Hz, 75 kHz
1600 x 1200 @ 60Hz, 75 kHz
1680 x 1050 @ 60Hz, 64.7 kHz
1.4.2 Function Test Display Pattern
Fine Line Morie Pattern (Figure1) Gray Scale Pattern (Figure2)
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Horizontal & Vertical Thickness Pattern (Figure 3) R. Color Pattern (Figure 4)
G. Color Pattern (Figure5) B. Color Pattern (Figure 6)
Full White Patter (Figure 7) Dark Screen Pattern (Figure 8)
21 ViewSonic Corporation Confidential - Do Not Copy VX2235wm-4 Black-White Pattern (Figure 9) 1.5 Function Test and Alignment Procedure 1.5.1 All Modes Reset You should do “All Mode Reset” (Refer to Ch apter III-3. Hot Keys for Function Controls) first. This action will allow you to erase all end-user’s settings and restore the factory defaults. 1.5.2 Auto Image Adjust Please select and enter “Auto Image Adjust ” function on Main Menu to see if it is workable. The “Auto Image Adjust ” function is aimed to offer a better screen quality by built-in ASIC. For optimum screen quality, the user has to adjust each function manually. 1.5.3 Firmware Test Pattern: Burn In Mode (Refer to Ch apter III-3. Hot Keys for Function Controls) - Make sure the F/W is the latest version. 1.5.4 DDC Test Pattern: EDID program - Make sure it can pass test program. 1.5.5 Fine Tune and Sharpness Test Signal: 1680*1050@60Hz Test Pattern: Line Moire Pattern - Check and see if the image has noise and fo cus performs well. Eliminate visual line bar. - If not, readjust by the following steps: (a) Select and enter “ Fine Tune” function on “ Manual Image Adjust ” to adjust the image to eliminate visual wavy noise. (b) Then, select and enter “ Sharpness” function to adjust the clar ity and focus of the screen image. 1.5.6 Boundary Test Signal: 1680*1050@60Hz Test Pattern: Horizontal & Vertical Line Thickness Pattern - Check and see if the image boundary is within the screen frame. - If not, readjust by the following steps:
22 ViewSonic Corporation Confidential - Do Not Copy VX2235wm-4 (a) Select and enter “Manual Image Adjust ” function on OSD Main Menu. (b) Then, select and enter “ Horizontal Size” or “Horizontal/Vertical Position ” function to adjust the video boundary to be full scanned and within screen frame. 1.5.7 White Balance Test Signal: 1680*1050@60Hz Test Pattern: White and Black Pattern 1.5.8 R, G, B, Colors Contrast Test Signal: 1680*1050@60Hz Test Pattern: R, G, B, Color Intensities Pattern and 16 Gray Scale Pattern - Check and see if each color is normal and distinguishable. - If not, please return the unit to repair area. 1.5.9 Screen Uniformity and Flicker Test Signal: 1680*1050@60Hz Test Pattern: Full White Pattern - Check and see if it is in normal condition. 1.5.10 Dead Pixel and Line Test Signal: 1680*1050@60Hz Test Pattern: Dark and White Screen Pattern - Check and see if there are dead pixels on LCD panel with shadow gauge and filter film. - The total numbers and distance of dead pixels should be compliant with the spec. 1.5.11 Mura Test Pattern: White, RGB, Black, & Grey Test Tool: 8% ND Filter - Check if the Mura can pass 8% ND Filter. 1.5.12 Audio Test Signal: Voice signal (optional, depend on model) Test Pattern: liberty - Make sure there is audio output. - Make sure that audio function (volume 80%) is working without noise and resonance. ≦ - Make sure that the sound of right and left speakers are in balance. 1.5.13 Check for Secondary Display Modes Test Signal: Analog: 640*350@70Hz; 640*480@60HZ 720*400@70Hz; 800*600@60HZ/70HZ/75HZ 832*624@75Hz, 1024*768@60HZ/70HZ/75HZ 1280*1024@60/75Hz Digital: 640*350@70Hz; 640*480@60HZ 720*400@70Hz; 800*600@60HZ/70HZ/75HZ 1024*768@60/70/72/75; 1152*870@75Hz, 1280*1024@60Hz/75HZ - Normally when the primary mode 1280*1024@60Hz is well adjusted and compliant with the specification, the secondary display modes will be great possible to be compliant with the spec. But we still have to check with the general test pattern to make sure every secondary is compliant with the specification. 1.5.14 All Modes Reset After final QC step, we have to erase all saved changes again and restore the factory defaults. You should do “All Mode Reset” again. 1.5.15 Power Off Monitor Turn off the monitor by pressing “Power” button.
23 ViewSonic Corporation Confidential - Do Not Copy VX2235wm-4 2. Firmware Upgrade Procedure When you receive the returned monitor, please check whether the firmware version is the latest. If not, please do the following procedures to upgrade it to the latest version. 2.1 Equipment Needed - VX2235WM4 Monitor - Fixture for Firmware Upgrade - VGA Cable - PC (Personal Computer) - LPT Cable - Firmware Upgrade Program - One additional monitor for checking the program execution 2.2 Setup Procedure 2.2.1 Connect P2 of Fixture with printer port of PC by LPT Cable. 2.2.2 Connect P1 of Fixture with Monitor by VGA Cable. 2.2.3 Connect Power Cord to Monitor. 2.2.4 Connect PC to the additional monitor. I. ISP Download program procedure 1 Hardware Connect status: 2 Down load isp program Step 1: Execute ISP.exe
24 ViewSonic Corporation Confidential - Do Not Copy VX2235wm-4 Step 2: Load file Press the Load MCU File button to select the file will be download. (*.hex) Step 3: Run Pressing the Run Button to start download program. Press OK button to Enter ISP mode. Step 4: Download program finish Pressing the OK Button to finish the download program procedure. Trouble shooting: If you find the status like the follow pi cture. Please check the following item. a. The connecting status between PC and ISP board. b. The connecting status between ISP status and Monitor. Turn off the power of monitor (AC plug off ) and disconnect the D-Sub connector . To connect the D-Sub connector and then turn on the power of monitor.(AC plug on)
25 ViewSonic Corporation Confidential - Do Not Copy VX2235wm-4 3. DDC Key In Procedure Note: 1. Every time after replacing the main board, you have to do the DDC key in. 2. If you find the DDC does not conform to the monitor, you have to do the DDC key in. 3.1 Equipment Needed - VX2235WM4 Series Monitor - DDC Card - PC - RS232 cable - DVI-DVI Cable - Barcode Reader - VGA Cable VX2235WM4 DDC Card PC RS232 cable VGA cable BAR code reader 3.2 Setup Procedure 1.Connect VGA Card and DDC Card with RS-232 cable. 2.Barcode Reader connect with keyboard and PC keyboard port. 3.Connect RS-232 Cable and VX2235WM4 with VGA Cable. 4.(when key in DVI DDC information, use VGA transform to DVI port ) 5.Connect Power Cord to VX2235WM4 Monitor.
3.3 DDC Key In Procedure
1.Run DDC.exe
2.Choose model number and conform the Time then Press “ENTER” key.
3.When appear the PIC “ choose DDC Card”, Press ALT+2 .Enter DDC 2B test interface.
Choose DDC Card
4.Press F8 to choose corresponding model.DAT(VX2235WM4A.DAT press“ENTER” key)
VX2235WM4_A means the DDC under analog mode. VX2235WM4D means the DDC under digital
mode.
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5.Press F9 enter the download interface 6.Key in the serial number or use the barcode r eader to scan the barcode of the monitor, and press “ENTER” key. 7.The successful picture is as follows. ”Compare EDID ：OK! Press any key to continue”. 27 ViewSonic Corporation Confidential - Do Not Copy VX2235wm-4