WARNING: Invoking the test described below will result in the clearing of data memory.

The EL-500L has built-in display and keyboard test functions. The self-test for the EL-500L is invoked by pressing and holding the 2ndF and STO keys, then pressing the reset button on the back of the calculator.

The display test is invoked first. Five different test patterns are displayed. The first test pattern is all segments/pixels/indicators on, with the remaining four patterns being various combinations of alternating segments/pixels/indicators. Press any key four times to step through the various test patterns. Press any key a fifth time to invoke the keyboard test.

The keyboard test requires pressing every key once. The keys do not need to be pressed in any particular order, except that the equal key must be pressed last. As each key is pressed, a row of pixels within a character cell will be displayed.

Finally press the equal key to complete the self-test. The message "GOOD 500A" will be momentarily displayed before the calculator clears itself.

(If you accidently press the equal key before completing the keyboard test, "Error" will be displayed. The reset button on the back of the calculator must be pressed to clear the error and exit self-test.)

WARNING: Invoking the test described below will result in the clearing of data memory and mode settings.

The EL-506D has built-in a display test function. With the calculator off, the display test for the EL-506D is invoked by pressing and holding the 2ndF and ) (right parenthesis) keys, then pressing the ON/C key.

The display test consists of five test patters, which the calculator steps through automatically at approximately one second per pattern. The first pattern is all segments except for the "busy" indicator energized. (The first pattern looks similar to the first test pattern of the EL-520G pictured below.) The second pattern is all segments off. The third pattern is alternate segments of the character and numeric portions of the display energized and "01" displayed in the exponent portion of the display. The fourth pattern is the other segments of the character and numeric portion of the display energized and "02" displayed in the exponent portion of the display. The fifth pattern only displays the "busy" indicator. When the display test finishes, the calculator is cleared and mode settings are restored to their factory defaults.

WARNING: Invoking the test described below will result in the clearing of data memory.

The EL-520G has built-in display and keyboard test functions. The self-test for the EL-520G is invoked by pressing and holding the 2ndF and M+ keys, then pressing the reset button on the back of the calculator.

The display test is invoked first. Four different test patterns are displayed. The first test pattern is all segments/pixels/indicators on, with the remaining three patterns being various combinations of alternating segments/pixels/indicators. Press the equal key three times to step through the various test patterns. Press the equal key a fourth time to invoke the keyboard test.

The keyboard test starts with "KEY" displayed at the left and some of the digit segments displayed. The keyboard test requires pressing every key once. The keys do not need to be pressed in any particular order, except that the equal key must be pressed last. As each key is pressed a digit segment or decimal point will be displayed.

Finally, press the equal key, "OK 520 540" is displayed. The reset on the back of the calculator must be pressed to exit the self-test function. Pressing the equal key again will restart the self-test

(If you accidently press the equal key before completing the keyboard test, "NG" will be displayed. The reset button on the back of the calculator must be pressed to clear the error and exit self-test.)

From top to bottom, the first four images are
the four display test patterns. The fifth image
is the start of the keyboard test. The sixth
image is the completed keyboard test before
pressing the equal key. The last image is
displayed upon successful completion of the test.

WARNING: Invoking the test described below will result in the clearing of data memory.

These calculators have built-in display and keyboard test functions. The self-test for the these calcuators is invoked by pressing and holding the 2ndF and M+ keys, then pressing the reset button on the back of the calculator.

The display test is invoked first. Five different test patterns are displayed. The first test pattern is all segments/pixels/indicators on, with the remaining four patterns being various combinations of alternating segments/pixels/indicators. Press any key four times to step through the various test patterns. (The test patterns are very similar to those shown below for the EL-546L.) Press any key a fifth time to invoke the keyboard test.

The keyboard test requires pressing every key once. The keys do not need to be pressed in any particular order, except that the equal key must be pressed last. As each key is pressed, a row of pixles within a character cell will be displayed.

Finally press the equal key to complete the self-test. The message "GOOD" along with the model number will be momentarily displayed before the calculator clears itself.
The EL-506L specifically displays "GOOD 506/556".
The EL-509LH and 531L specifically display "GOOD 509/531".
The EL-509RH, EL-531R and EL-531V specifically display "GOOD 509,531".

(If you accidently press the equal key before completing the keyboard test, "Error" will be displayed. The reset button on the back of the calculator must be pressed to clear the error and exit self-test.)

The first image is the display
at the start of the keyboard
test. The second image shows
the display upon successful
completion of the keyboard
test before the equal key is
pressed to exit the self-test
function.

WARNING: Invoking the test described below will result in the clearing of data memory.

The EL-546L has built-in display and keyboard test functions. The self-test for the EL-546L is invoked by pressing and holding the 2ndF and M+ keys, then pressing the reset button on the back of the calculator.

The display test is invoked first. Five different test patterns are displayed. The first test pattern is all segments/pixels/indicators on, with the remaining four patterns being various combinations of alternating segments/pixels/indicators. Press the equal key four times to step through the various test patterns. Press the equal key a fifth time to invoke the keyboard test.

The keyboard test requires pressing every key once. The keys do not need to be pressed in any particular order, except that the equal key must be pressed last. As each key is pressed, a column of pixles within a character cell will be displayed.

Finally press the equal key to complete the self-test. The message "GOOD 546" will be momentarily displayed before the calculator clears itself.

(If you accidently press the equal key before completing the keyboard test, "Error" will be displayed. The reset button on the back of the calculator must be pressed to clear the error and exit self-test.)

From top to bottom, the first five
images are the five display test
patterns. The sixth image is the
start of the keyboard test.