ViewSonic Vx2255wmb-2 Service Manual

							

 
 
         832 X 624 @ 75Hz (Apple,Mac II)
         1024 X 768 @ 60Hz (VESA)
         1024 X 768 @ 70Hz (VESA)
         1024 X 768 @ 75Hz (VESA)
  1280 X 1024 @ 75Hz (VESA)
(37)     Manufacturer's Reserved Timing:
         1152 X 870 @ 75Hz (Apple,Mac II)
(38-53)  Standard Timing Identification:
         1600 X 1200 @60Hz
         1400 X 1050 @60Hz
         1440 X 900 @60Hz
         1280 X 960 @60Hz
         1280 X 1024 @60Hz
         1152 X 864 @75Hz
         Not Used
         Not Used
______________________________________________________________________
(54-71) Detailed Timing / Descriptor Block 1:
                  1680x1050  Pixel Clock: 146.25 MHz
______________________________________________________________________
         Horizontal Image Size: 474 mm     Vertical Image Size: 296 mm
         Refreshed Mode: Non-Interlaced    Normal Display- No Stereo
Horizontal:
         Active Time: 1680 pixels          Blanking Time: 560 pixels
         Sync Offset: 104 pixels           Sync Pulse Width: 176 pixels
         Border: 0 pixels                  Frequency: 65.29 KHz
Vertical:
         Active Time: 1050 lines           Blanking Time: 39 lines
         Sync Offset: 3 lines              Sync Pulse Width: 6 lines
         Border: 0 lines                   Frequency: 59.95 Hz
Digital Separate, Horizontal Polarity (-) Vertical Polarity (+)
______________________________________________________________________
(72-89) Detailed Timing / Descriptor Block 2:
         Monitor Serial Number:
         QKA070100001
______________________________________________________________________
(90-107) Detailed Timing / Descriptor Block 3:
         Monitor RangeLimits:
         Min Vertical Freq- 50 Hz
         Max Vertical Freq- 75 Hz
         Min Horiz. Freq- 24 KHz
         Max Horiz. Freq- 82 KHz
         Pixel Clock- 170 MHz
         Secondary GTF- Not Supported
______________________________________________________________________
(108-125) Detailed Timing / Descriptor Block 4:
         Monitor Name:
         VX2255wm-2
(126)    No Extension EDID Block(s)
(127)    CheckSum OK
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VX2255wmh-2_D
                            Time:  08:19:00
                        Date:  Tue Jan 16, 2007
______________________________________________________________________
                        VIEWSONIC CORPORATION
                    EDID Version # 1,  Revision # 3
                  DDCTest For: ViewSonic VX2255wm-2
______________________________________________________________________
EDID Block 0, Bytes 0-127
128 BYTES OF EDID CODE:
         0   1   2   3   4   5   6   7   8   9
      ________________________________________
  0  |  00  FF  FF  FF  FF  FF  FF  00  5A  63
 10  |  1F  9B  01  01  01  01  01  11  01  03
 20  |  80  2F  1E  78  2E  DC  55  A3  59  48
 30  |  9E  24  11  50  54  BF  EF  80  A9  40
 40  |  90  40  95  00  81  40  81  80  71  4F
 50  |  01  01  01  01  21  39  90  30  62  1A
 60  |  27  40  68  B0  36  00  DA  28  11  00
 70  |  00  1C  00  00  00  FF  00  51  4B  41
 80  |  30  37  30  31  30  30  30  30  31  0A
 90  |  00  00  00  FD  00  32  4B  18  52  11
100  |  00  0A  20  20  20  20  20  20  00  00
110  |00  FC  00  56  58  32  32  35  35  77
120  |  6D  2D  32  0A  20  20  00  37
______________________________________________________________________
(08-09)  ID Manufacturer Name ________________  = VSC
(11-10)  Product ID Code _____________________  = 9B1F
(12-15)  Last 5 Digits of Serial Number ______  = Not Used
(16)     Week of Manufacture _________________  = 01
(17)     Year of Manufacture _________________  = 2007
(10-17)  Complete Serial Number ______________  = See Descriptor Block
(18)     EDID Version Number _________________  = 1
(19)     EDID Revision Number ________________  = 3
(20)     VIDEO INPUT DEFINITION:
         Digital Signal
         Non- VESA DFP 1.x Compatible
(21)     Maximum Horizontal Image Size ________________    =  470 mm
(22)     Maximum Vertical Image Size __________________    =  300 mm
(23)     Display Gamma ________________________________    =  2.20
(24)     Power Management and Supported Feature(s):
         Active Off/Very Low Power, Standard Default Color Space,
         Preferred Timing Mode
         Display Type = R/G/B Color
(25-34)  CHROMA INFO:
         Red X- 0.640 Green X- 0.284 Blue X- 0.142 White X- 0.313
         Red Y- 0.349 Green Y- 0.617 Blue Y- 0.067 White Y- 0.329
(35)     ESTABLISHED TIMING I:
         720 X 400 @ 70Hz (IBM,VGA)
640 X 480 @ 60Hz (IBM,VGA)
         640 X 480 @ 67Hz (Apple,Mac II)
640 X 480 @ 72Hz (VESA)
         640 X 480 @ 75Hz (VESA)
         800 X 600 @ 56Hz (VESA)
         800 X 600 @ 60Hz (VESA)
(36)     ESTABLISHED TIMING II:
         800 X 600 @ 72Hz (VESA)
         800 X 600 @ 75Hz (VESA)
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         832 X 624 @ 75Hz (Apple,Mac II)
         1024 X 768 @ 60Hz (VESA)
         1024 X 768 @ 70Hz (VESA)
         1024 X 768 @ 75Hz (VESA)
         1280 X 1024 @ 75Hz (VESA)
(37)     Manufacturer's Reserved Timing:
         1152 X 870 @ 75Hz (Apple,Mac II)
(38-53)  Standard Timing Identification:
         1600 X 1200 @60Hz
         1400 X 1050 @60Hz
         1440 X 900@60Hz
         1280 X 960 @60Hz
         1280 X 1024 @60Hz
         1152 X 864 @75Hz
         Not Used
         Not Used
______________________________________________________________________
(54-71) Detailed Timing / Descriptor Block 1:
1680x1050  Pixel Clock: 146.25 MHz
______________________________________________________________________
         Horizontal Image Size: 474 mm     Vertical Image Size: 296 mm
         Refreshed Mode: Non-Interlaced    Normal Display- No Stereo
Horizontal:
         Active Time: 1680 pixels          Blanking Time: 560 pixels
         Sync Offset: 104 pixels           Sync Pulse Width: 176 pixels
         Border: 0 pixels                  Frequency: 65.29 KHz
Vertical:
         Active Time: 1050 lines       Blanking Time: 39 lines
         Sync Offset: 3 lines              Sync Pulse Width: 6 lines
         Border: 0 lines                   Frequency: 59.95 Hz
Digital Separate, Horizontal Polarity (-) Vertical Polarity (+)
______________________________________________________________________
(72-89) Detailed Timing / Descriptor Block 2:
         Monitor Serial Number:
         QKA070100001
______________________________________________________________________
(90-107) Detailed Timing / Descriptor Block 3:
         Monitor Range Limits:
         Min Vertical Freq- 50 Hz
         Max Vertical Freq- 75 Hz
         Min Horiz. Freq- 24 KHz
         Max Horiz. Freq- 82 KHz
         Pixel Clock- 170 MHz
         Secondary GTF- Not Supported
______________________________________________________________________
(108-125) Detailed Timing / Descriptor Block 4:
         Monitor Name:
         VX2255wm-2
(126)    No Extension EDID Block(s)
(127)    CheckSum OK
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5. Adjustment Procedure 
 
 5.1  Key Function Description 
CONTROL KEY KEYS FUNCTION 
[AUTO] [2]  By pressing [AUTO] key,  “Auto Image Adjust” is performed 
[MENU] [1]  By pressing [MENU] key, Main menu display   
[▼ ] [▲ ]  A. When “MENU OSD” display, press these keys to change the contents of an 
adjustment item, or change an adjustment value 
B. When “MENU OSD” is un-display, press these keys to change brightness and  contrast 
[POWER] []  Power on or power off the monitor 
  5.2  Hot Key Operation  
[1] Main  Menu 
[2] Input toggle (Analog / Digital)   
[▼ ]  To immediately activate  Brightness/Contrast menu. 
[▼ ] +[▲ ]  Recall both of Contrast and Brightness to default 
[1] + [2]  Toggle 720x400 and 640x400 mode when input 720x400 
or 640x400 mode 
[1] + [
▼] + [ ▲] 
(Keep pushing 3 sec)  White Balance. (Not shown on user’s guide) 
[1] + [
▼] Power Lock 
[1] + [ ▲] OSD Lock 
[2] + [ ▼] HDCP switch  Æ on = DDC/CI ; off = DDC2B 
[▼ ] +[▲ ] + [] Factory Mode 
Remark : All the short cuts function are only available while OSD off 
 
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5.3 OSD Control  
5.3.1 OSD table 
Layer 1 Layer 2 Layer 3 
Auto Image Adjust     
Contrast (+ / -)   Contrast/Brightness 
Brightness (+ / -)   
Vo l u m e  Volume (+ / -) Audio  Mute On/Off 
sRGB   
9300K   
7500K  
6500K   
5400K   
Red (+ / -) 
Green (+ / -) 
Color Adjust 
User Color  Blue (+ / -) 
Information     
H Position (+ / -) H/V Position 
V Position (+ / -) 
H Size  + / - 
Fine Tune + / - 
Manual Image Adjust 
Sharpness + / - 
English 
French 
German 
Italian 
Spanish 
Finnish 
Japanese 
Simplified Chinese 
Language Select 
Traditional Chinese 
Resolution Notice  On/Off 
H Position (+ / -) OSD Position 
V Position (+ / -) 
OSD Time Out   
Setup Menu 
OSD Background On/Off 
Memory Recall     
  
						

							

5.3.2 OSD lock Menu function 
                          OSD Lock Menu Function Check 
Item Method Phenomenon 
Activate OSD lock  [1] + [▲] 10S  Press any of buttons1, 
▼,  
 ▲ , 2 will appear OSD Locked 
3s 
Deactivate OSD lock:  [1] + [ ▲] 10S(again) 
 
NOTICE:  
When the OSD is locked will lock all functions. 
Status bar indicating OSD Lock or Unlock is in progress and when complete it will indicate “OSD 
Locked” 
        OSD Lock should not lock Power Button and Power Lock function 
5.3.3 Power lock Menu function 
                        Power Lock Menu Function Check 
Item Method Phenomenon 
Activate Power Lock  [1] + [ ▼] 10S  Can not turn off the LCD; 
Press the power button will 
appear Power Button 
Locked OSD 3s; 
LCD would automatically turn 
back On when power is 
restored after a power failure 
Deactivate Power Lock    [1] + [
▼] 10S(again)   
NOTICE:  
Status bar indicating Power Button lock or unlock is in progress and when complete it will indicate 
“Power Button Locked” 
  Power should only be lockable in the “On State” 
 
 
 
 
 
 
 
 
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5.3.4 Resolution notice function 
 
Resolution Notice Menu 
Item Method Phenomenon 
Activate  
Resolution Notice Menu Resolution Notice OSD should show 
on screen after changing to 
non-native mode for 30 sec,   
And it should disappear after 10s   
or by pushing button [1] or [2] 
------ 
Deactivate  
Resolution Notice Menu 
Push button [2] under Resolution 
Notice OSD, select Disable 
------- 
5.3.5 Factory Mode Introduction 
  When input the signal, press “power key” to turn off the monitor. Press”
 [2] +[] “at the 
same time so as to enter factory mode. After  power on, press ‘’Menu[1]’’ key, you can see the 
Factory menu.   
INL
 MT220WW01  : Currently using panel model name 
V2 070328  : Currently using firmware version information. 
Auto Color  : Automatically ca librate chip ADC parameter by using chip internal DAC 
Color Temperature  : The R, G, B of 9300K and 7500K and 6500K and 5400K and User Mode 
    Colors are all generated from scaling back end. 
5.4 Burn-in pattern 
If it is a new monitor, and  in factory mode, if no VGA  signal input, Burn-in pattern 
will self generate automatically. Burn in patterns are: full Red, Green, Blue, White and 
Black. You can not escape from Burn-in pattern  until plug in VGA Cable or press the power 
key to turn the monitor off and then turn it on. 
5.5 Auto Color (Automatically  calibrate chip ADC parameter 
by using chip internal DAC) 
If it is a new-built set and it is first time to do  the “auto color”, please confirm the following steps: 
-Connect the VGA cable with the standard video pattern generator and display 5-mosic pattern 
on the monitor. 
- Press “Power” to power off the monitor. 
- Press”  
[▼ ] +[ ▲] + [] “simultaneously to enter factory mode. 
- Press ‘’Menu[1]’’, then press ‘’Auto[ 2]’’ to execute Auto color item. 
- After the “Auto Color” process finished, please press “Power” to restart monitor. 
 
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5.6  EDID (Rewrite EDID data to EEPROM) 
If we need to rewrite the EEPROM data, please confirm the following steps. 
1. Plug in VGA Cable; we can rewrite the EDID data to EEPROM by using “EDID Rewrite” 
program. 
2. If the “EDID Rewrite” process finished , please pull out VGA cable and press ‘’2’’+’’ ▲’’ at the 
same time. 
3. Pull out AC power cable or press power key to restart. 
5.7      Upload firmware to MCU via VGA Cable 
5.7.1 Connect ISP board between m onitor and PC as below configure 
 
 
 
 
 
 
  
 
 
5.7.2 Using mStar ISP Tool Update FW:   
(1). Seletct “Read”, Choose the corr esponding firmware, load to MCU. 
(2). Select “Connect”, auto connect for ISP. 
 
 
 
 
 
 
 
ISP Board 
Print Port D-SUB 
LCD Monitor 
D-Sub 
Insert to Print 
Port 25pin 
Service 
cable
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(3). Select “Run”, start ISP.   
 
 
 
 
(4). When the picture show “Verify OK”, ISP finished.   
 
 
 
 
 
 
 
 
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5.7.3  After repair, to ensure the quality you should do the following 
test and adjustment 
 
Item Content Equipment 
Test OSD function  1.Signal is set as 1680x1050@60Hz   
2. LCM button are from left to right, checking whether each single 
function key and compound function key can be worked.  Chroma 
Signal Generator 
Contrast Check 1. Set input mode to 1680x1050@60Hz 
2. Set Pattern to 32 gray shades 
3. Set contrast to the max. The brightest 6~8 shades brightness cannot 
be distinguished.  Chroma 
Signal Generator 
Color Temperature 1. Do “Auto color” at 1680 x 1050@60Hz, 5-Mosic pattern 
2. Measure color temperature, check it complies with the following 
temperature: 
        5400K x=0.335 +/- 0.02, y=0.350 +/- 0.02  6500K x=0.313 +/- 0.02, y=0.329 +/- 0.02 
7500K x=0.299 +/- 0.02,y=0.315 +/- 0.02 
9300K x=0.283 +/- 0.02, y=0.298 +/- 0.02  Chroma Signal 
Generator and color 
analyzer 
Modes switching 
check  1. Use Chroma Pattern Generator to make sequence.   
VESA (640x480 800x6 00 1024x768 1280x1024 ), MAC 832x624 
DOS (640x350 720x400), the detail supported modes and power 
saving signal. 
2. Confirm the above timing modes must be full screen and the  picture must be normal. 
3. LED is Orange at power saving mode.  Chroma Signal 
Generator 
Y measurement at 
default setting 
1. Set brightness to default value 100 and contrast to default value 
70 at 6500K 
2. At full white patter, Measure Y, which should be  ≥ 250cd/m²   Chroma Signal 
Generator and Color 
Analyzer 
Panel Flicker 
check  1. Mode: 1680x1050@60Hz 
2. Set Brightness& contrast to default value 
3. Do “Auto Image Adjust” 
4. Shut down PC to check whether there’s glitter on the center of the 
picture.  Equipment::            
Chroma Signal 
Generator & PC 
Power saving 1. Mode: 1680x1050@60Hz 
2.  Pattern: full white 
3. Brightness: Max. 
4. Contrast: Default  
5.  Check power consumption at each modes 
State  Power Consumption LED color 
Normal 
≤ 42W  Blue 
Stand By  < 2W  Orange 
Power Key Off  ＜
1Ｗ  
No   Chroma signal 
generator and Power 
meter 
AC input: 230V/50Hz 
 
 
 
 
 
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