Lenovo 9220-HB1 - How to enter service mode – power and inverter schematic – 20 inch LCD Color Monitor
Service
mode / Factory mode:
* Turn 'ON' the power.* Press the MENU button; and pull out the power cord; and then plug the power cord again.
* The the factory OSD will be at the left top of the panel.
* Turn the Power-button 'OFF' to quit from factory mode.
White-
Balance, Luminance Adjustment
Approximately 30 minutes should be allowed for warm up before proceeding
White-Balance adjustment.
1. How to do the Chroma-7120 MEM. Channel setting
A. Reference to chroma 7120 user guide
B. Use “SC” key and “NEXT” key to modify x, y, Y value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust
2. Setting the color temp. you want
A. MEM.CHANNEL 3 (7800 color):
7800 color temp. parameter is x = 296±18, y = 311±18, Y = 180 cd/m2 ,
B. MEM.CHANNEL 4 (6500 color):
6500 color temp. parameter is x = 313±18, y = 329±18, Y =180 cd/m2
3. Enter into factory mode of 9220-HB1.
1. How to do the Chroma-7120 MEM. Channel setting
A. Reference to chroma 7120 user guide
B. Use “SC” key and “NEXT” key to modify x, y, Y value and use “ID” key to modify the TEXT description Following is the procedure to do white-balance adjust
2. Setting the color temp. you want
A. MEM.CHANNEL 3 (7800 color):
7800 color temp. parameter is x = 296±18, y = 311±18, Y = 180 cd/m2 ,
B. MEM.CHANNEL 4 (6500 color):
6500 color temp. parameter is x = 313±18, y = 329±18, Y =180 cd/m2
3. Enter into factory mode of 9220-HB1.
4. 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.
Set the Contrast to 50; Adjust the Brightness to 80.
5.
Gain adjustment:
Move cursor to “-F-” and press MENU key
A. Adjust 7800 color-temperature
1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM. Channel to Channel 3 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 296±18, y = 311±18, Y = 180 cd/m2
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±2
Move cursor to “-F-” and press MENU key
A. Adjust 7800 color-temperature
1. Switch the Chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM. Channel to Channel 3 (with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 296±18, y = 311±18, Y = 180 cd/m2
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±2
B. Adjust
6500 color-temperature
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 4(with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 313±18, y = 329±18, Y =180 cd/m2
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 reachedthe 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±2
C. Turn the Power-button off to quit from factory mode.
1. Switch the chroma-7120 to RGB-Mode (with press “MODE” button)
2. Switch the MEM.channel to Channel 4(with up or down arrow on chroma 7120)
3. The LCD-indicator on chroma 7120 will show x = 313±18, y = 329±18, Y =180 cd/m2
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 reachedthe 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±2
C. Turn the Power-button off to quit from factory mode.
SMPS Circuit diagram
Inverter
Click on the schematics to magnify
