Sharp ER-A750, Service Manual

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3-6. Liquid Crystal Display Diagnostics
The ER-A750 LCD display is checked.
The test program displays the patterns in the following sequence.
Every time when the ENTER key is pressed, the next pattern is
displayed. When the ENTER key is pressed at the final pattern, or
when the CANCEL key is pressed at the midst of the check, the
display returns to the menu screen.
1) Liquid Crystal Display Check
1 Check content
The test patterns are displayed in the following sequence. When
the ENTER key is pressed, the next pattern is displayed.
•
Black and white pattern at 1 dot pitch
•
Reversed pattern of the above
•
Vertical stripe pattern at 1 dot pitch
•
Reversed pattern of the above
•
Horizontal stripe pattern at 1 dot pitch
•
Reversed pattern of the above
•
The outermost peripheral of the LCD’s active area is displayed
in one-dot line.
•
"H" pattern. "H" is displayed in 40 digits and 15 lines. The 15th
line only has 39 digits of "H."
3 Terminating procedure
Press the ENTER key at the final pattern, or press the CANCEL
key to terminate the check.
3-7. Rear Display Diagnostics
The rear display is checked.
The test program displays the following patterns. When the CANCEL
key is pressed, the display returns to the diagnostics menu.
1) Rear Display Check
1 Check content
The test patterns are displayed in the following sequence. When
the ENTER key is pressed, the next pattern is displayed.
•
The test pattern below is displayed.
•
The test pattern with all the elements ON is displayed.
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