Sharp LC-26GA4D, Service Manual

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LC-26GA4D
LC-26GA4U
4. COM BIAS adjustment
Shift to the [COM BIAS] item with the cursor UP/DOWN key and select a numeric value with the cursor
RIGHT/LEFT key.
Changing the numeric value with the cursor UP/DOWN key will make appear the test pattern. Make an
adjustment so that the flicker near the center of the screen is minimized.
Adjusting procedure by use of [RS-232C]
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Get ready the PC with COM port (RS-232C) running on Windows 95/98/ME/2000/XP operating system,
as well as the RS-232C cross cable.
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Start the unit with the RS-232C cable connected.
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Start the terminal software. (The freeware readily available on the Internet will do.)
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Make the following settings.
Baud rate 9600
Data 8 bits
Parity None
Stop bit 1 bit
Flow control Not implemented
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If the settings are correct, the terminal software indicates "ERR" against pressing of the "ENTER" key.
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After the settings are done correctly, it is possible to make an adjustment by typing in the command
shown in the table below and pressing the "ENTER" key on the keyboard.
Command entry is successful if the terminal software indicates "OK" when the "ENTER" is pressed.
If "ERR" is shown, retry to enter the command.
RS232C command table
Command Function Remarks
MSET1001
MOFR****
MOFG****
MOFB****
MGAR****
MGAG****
MGAB****
MINF0000
MINF0001
MINF0002
Starting the white balance adjustment
Adjusting the R GAMMA L value
Adjusting the G GAMMA L value
Adjusting the B GAMMA L value
Adjusting the R GAMMA H value
Adjusting the G GAMMA H value
Adjusting the B GAMMA H value
Displaying the R GAMMA table
Displaying the G GAMMA table
Displaying the B GAMMA table
Ending the adjustment with a numeric value
other than 1001
Range: 0000~0255
Range: 0000~0255
Range: 0000~0255
Range: 0000~0255
Range: 0000~0255
Range: 0000~0255