![background image](http://html1.mh-extra.com/html/viewsonic/va502mb-1/va502mb-1_service-manual_1020920023.webp)
3.) Into factory mode of VA502mb
Turn on power, press the MENU button, pull out the power cord, and then plug the power cord.
Then the factory OSD will be at the left top of the panel.
4.) Bias adjustment:
Set the
Contrast
to 70
Adjust the
Brightness
to 100
.
5.) Gain adjustment:
Move cursor to “-F-” and press MENU key
A. Adjust 9300 color-temperature
(1). Switch the Chroma-7120 to
RGB-Mode
(with press “MODE” button )
(2). Switch the MEM. channel to Channel 9 ( with up or down arrow on chroma 7120 )
(3). The LCD-indicator on chroma 7120 will show x = 0.283
±
0.03, y =0.298
±
0.03,Y = 200
±
20 cd/m
2
(4). Adjust the RED of color1 on factory window until chroma 7120 indicator reached the
value R=100
(5). Adjust the GREEN of color1 on factory window until chroma 7120 indicator reached the
value G=100
(6). Adjust the BLUE of color1 on factory window until chroma 7120 indicator reached the
value B=100
(7). Repeat above procedure ( item 4,5,6) until chroma 7120 RGB value meet the
tolerance =100
±
5
B. Adjust 6500 color-temperature
(1). Switch the chroma-7120 to
RGB-Mode
(with press “MODE” button )
(2). Switch the MEM .channel to Channel 10( with up or down arrow on chroma 7120 )
(3). The LCD-indicator on chroma 7120 will show x = 0.313
±
0.03, y = 0.329
±
0.03, Y = 200
±
20 cd/m
2
(4). Adjust the RED of color3 on factory window until chroma 7120 indicator reached the
value R=100
(5). Adjust the GREEN of color3 on factory window until chroma 7120 indicator reached the
value G=100
(6). Adjust the BLUE of color3 on factory window until chroma 7120 indicator reached the
value B=100
(7). Repeat above procedure ( item 4,5,6) until chroma 7120 RGB value meet the
tolerance =100
±
5
20
ViewSonic Corporation
Confidential - Do Not Copy
VA502mb-1
Summary of Contents for VA502mb-1
Page 10: ...7 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 13: ...10 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 14: ...11 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 16: ...PIN Descriptions 13 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 18: ...Block Diagram PIN Function 15 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 38: ...5 7 Packing Procedure 35 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 42: ...39 ViewSonic Corporation Confidential Do Not Copy VA502mb 1 6 Troubleshooting Flow Chart...
Page 43: ...7 Block Diagram 40 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 53: ...9 PCB Layout Diagrams MAIN BOARD 50 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 54: ...POWER BOARD 51 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 56: ...53 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 57: ...AUDIO BOARD 54 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 58: ...KEY BOARD 55 ViewSonic Corporation Confidential Do Not Copy VA502mb 1...
Page 61: ...58 ViewSonic Corporation Confidential Do Not Copy VA502mb 1 Packing for Shipping...