ViewSonic VA2016W Service Manual - Page 46

Upload firmware to MCU via VGA Cable, EDID Rewrite EDID data to EEPROM

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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 AC power cable or press power key to restart 7. Upload firmware to MCU via VGA Cable 7.1 Connect ISP board between monitor and PC as below configuration. Insert to Parallel Port on PC ISP Board LCD Monitor D-Sub D-SUB Parallel Port 7.2. Press the "connect" button in ISP.exe, and select the device type, which is used in this monitor. Choose the corresponding firmware version, and load to MCU. 7.3. After finish, please plug out power cable and re-start monitor again. 8. After repair, to ensure the quality you should do the following test and adjustment Item Content Equipment Test OSD 1. Signal is set as 1440×900@60Hz under General-1 function 2.Checking whether each single function key and compound Chroma function key can be worked. Signal Generator Contrast Check 1. Set input mode to 1440×900@60Hz 2. Set Pattern to 32 gray shades Chroma 3. Set contrast to the max. The brightest 5~8 shades Signal Generator brightness cannot be distinguished. Color 1. Do "Auto color Balance" at 1440×900@60Hz, 32gray Temperature shades Chroma Signal 2. Measure color temperature, check it complies with the Generator and following temperature : color analyzer 6500K x = 0.313 +/- 0.03, y = 0.329+/-0.03 9300K x = 0.283 +/- 0.03, y = 0.298+/-0.03 Modes switching1. Use Chroma Pattern Generator to make sequence. check VESA (640x480 800x600 1024x768 1280x1024), Chroma and power saving signal,etc. Signal Generator ViewSonic Corporation 43 Confidential - Do Not Copy VA2016w-2

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43
ViewSonic Corporation
Confidential - Do Not Copy
VA2016w-2
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 AC power cable or press power key
to restart
7.
Upload firmware to MCU via VGA Cable
7.1 Connect ISP board between monitor and PC as below configuration.
7.2. Press the “connect” button in ISP.exe, and select the device type, which is used in
this monitor. Choose the corresponding firmware version, and load to MCU.
7.3. After finish, please plug out power cable and re-start monitor again.
8.
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 1440×900@60Hz under General-1
2.Checking whether each single function key and compound
function key can be worked.
Chroma
Signal Generator
Contrast Check 1. Set input mode to 1440×900@60Hz
2. Set Pattern to 32 gray shades
3. Set contrast to the max. The brightest 5~8 shades
brightness
cannot be distinguished.
Chroma
Signal Generator
Color
Temperature
1. Do “Auto color Balance” at 1440×900@60Hz, 32gray
shades
2. Measure color temperature, check it complies with the
following temperature :
6500K x = 0.313 +/- 0.03, y = 0.329+/-0.03
9300K x = 0.283 +/- 0.03, y = 0.298+/-0.03
Chroma Signal
Generator and
color analyzer
Modes switching
check
1. Use Chroma Pattern Generator to make sequence.
VESA (640x480 800x600 1024x768 1280x1024),
and power saving signal,etc.
Chroma
Signal Generator
Insert to Parallel
Port
on PC
ISP Board
LCD Monitor
D-Sub
Parallel Port
D-SUB