WARNING: Invoking the test described below will result in the clearing of data memory and mode settings.
Summary of Contents for Casio fx-991EX Page 1 QUICK START GUIDE fx-991EX The fx-991EX “ClassWiz” features a high-resolution display, making it easier to view formulas and symbols. This remarkable screen can display between 2-6 times as many characters as other scientific calculators, yet still runs on solar power. Do not try using the calculator while the battery is completely dead (fx-991ES PLUS). The battery that comes with the calculator discharges slightly during shipment and storage. Because of this, it may require replacement sooner than the normal expected battery life.
The fx-82TL has a display self-test, and a simple keyboard test.
Display Test. The display self-test for the fx-82TL is invoked by pressing and holding the SHIFT key, then pressing the reset button (labeled 'P') located on the back of the calculator. The SHIFT key is pressed to advance through the display test patterns. The first test pattern energizes alternate rows of segments. The second test pattern is a blank display, the third and fourth test patterns energize alternate segments, and the fifth test pattern energizes all segments. Continuing to press the SHIFT key will cycle through the second through fifth display patterns.
Pressing the ALPHA key from the fifth test pattern (all segments energized), will restart the display self-test from the first pattern. Pressing the ALPHA key from the second test pattern (blank display), will display the fifth test pattern (pressing ALPHA again will restart the display self-test).
The reset button on the back of the calculator can be pressed at any time to exit the display self-test.
Keyboard Test. From any of the display test patterns, press the right-cursor key (Replay right key). However, it is recommended that the keyboard test only be invoked from the first or fifth test pattern. The display will shimmer while the key is held down (it appears that alternate rows of segments are being quickly energize and deenergized). You can then proceed to press any key, except the AC/ON, on the keyboard. The display will shimmer as long as a key is held down. Pressing the AC/ON key will exit the self-test and return the calculator to normal operation.