Front panel tests
There are three front p
anel tests: one to test the functionality of the front panel keys and two
to test the display. In the event of a test failure, refer to Display board checks for details on
troubleshooting the display board.
KEYS test
The KEYS test lets you check the functionality of each front panel key. Perform the following
steps to run the KEYS test.
1
. Display the MAIN MENU by pressing the MENU key.
2. Select TEST, and press ENTER to display the SELF-TEST MENU.
3. Select DISPLAY-TESTS, and press ENTER to display the following menu:
FRONT PANEL TESTS
KEYS DISPLAY-PATTERNS CHAR-SET
4. Select KEYS, and press ENTER to start the test. When a key is pressed, the label name
for that key will be displayed to indicate that it is functioning properly. When the key
is released, the “No keys pressed” message is displayed.
5. Pressing EXIT tests the EXIT key. However, the second consecutive press of EXIT
aborts the test and returns the instrument to the FRONT PANEL TESTS MENU.
Continue pressing EXIT to back out of the menu structure.
DISPLAY PATTERNS test
The display patterns test lets you verify that each pixel and annunciator in the vacuum fluores-
cent display is working properly. Perform the following steps to run the display patterns test:
1. Display the MAIN MENU by pressing the MENU key.
2. Select TEST,
and press ENTER to display the SELF-TEST MENU.
3. Select DISPLAY-TESTS, and press ENTER to display the following menu:
FRONT PANEL TESTS
KEYS DISPLAY-PATTERNS CHAR-SET
4. 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:
• 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.
5.
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.
Troubleshooting 4-3
2410-902-01.book Page 3 Monday, November 7, 2005 2:49 PM
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