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20-4
Routine Maintenance
DISPLAY PATTERNS test
The display test lets you verify that each pixel and annunciator in the vacuum fluorescent
display is working properly. Perform the following steps to run the display test:
1.
2.
3.
4.
5.
CHAR SET test
The character set test lets you display all characters. Perform the following steps to run the
character set test:
1.
2.
3.
4.
5.
Display the MAIN MENU by pressing the MENU key.
Select TEST, and press ENTER to display the SELF-TEST MENU.
Select DISPLAY-TESTS, and press ENTER to display the following menu:
FRONT PANEL TESTS
KEYS DISPLAY-PATTERNS CHAR-SET
Select DISPLAY-PATTERNS, and press ENTER to start the display test. There are five
parts to the display test. Each time a front panel key (except EXIT) is pressed, the next
part of the test sequence is selected. The five parts of the test sequence are as follows:
•
Checkerboard pattern (alternate pixels on) and all annunciators.
•
Checkerboard pattern and the annunciators that are on during normal operation.
•
Horizontal lines (pixels) of the first digit are sequenced.
•
Vertical lines (pixels) of the first digit are sequenced.
•
Each digit (and adjacent annunciator) is sequenced. All the pixels of the selected
digit are on.
When finished, abort the display test by pressing EXIT. The instrument returns to the
FRONT PANEL TESTS MENU. Continue pressing EXIT to back out of the menu
structure.
Display the MAIN MENU by pressing the MENU key.
Select TEST, and press ENTER to display the SELF-TEST MENU.
Select DISPLAY-TESTS, and press ENTER to display the following menu:
FRONT PANEL TESTS
KEYS DISPLAY-PATTERNS CHAR-SET
Select CHAR-SET, and press ENTER to start the character set test. Press any key
except EXIT to cycle through all displayable characters.
When finished, abort the character set test by pressing EXIT. The instrument returns to
the FRONT PANEL TESTS MENU. Continue pressing EXIT to back out of the menu
structure.
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