Troubleshooting 4-3
Front panel tests
There are three front panel 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 trou-
bleshooting 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 message “No keys pressed” 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 SELF-TEST MENU. Continue pressing
EXIT to back out of the menu structure.
DISPLAY PATTERNS test
The display test lets you verify that each pixel and annunciator in the vacuum fluorescent dis-
play is working properly. Perform the following steps to run the display 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 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.
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.
Summary of Contents for SourceMeter 3A 2420
Page 2: ...Model 24203A SourceMeter Service Manual A G R E A T E R M E A S U R E O F C O N F I D E N C E...
Page 15: ...1 Performance Verification...
Page 31: ...2 Calibration...
Page 53: ...3 Routine Maintenance...
Page 56: ...3 4 Routine Maintenance...
Page 57: ...4 Troubleshooting...
Page 70: ...4 14 Troubleshooting...
Page 71: ...5 Disassembly...
Page 78: ...5 8 Disassembly...
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Page 84: ...6 Replaceable Parts...
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Page 107: ...A Specifications...
Page 112: ...A 6 Specifications...
Page 113: ...B Command Reference...
Page 124: ...B 12 Command Reference...
Page 125: ...C Calibration Programs...
