Sharp EL-9900 Operating Guide - Page 3

Changing the keyboard Using the reversible keyboard of this calculator changes not only its appearance, but also its internal functions and configurations. To change the keyboard: Note: 1. Press to turn off the calculator's power. 2. Open the battery compartment cover. Hold the calculator as illustrated. 3. Slide the keyboard eject tab (KEYBOARD EJECT) down. The keyboard will be ejected. Be careful not to drop the keyboard on the floor, as this may damage it. 4. Turn the keyboard over, and place it back in the calculator as illustrated. Secure by gently pressing the keyboard until you hear the notch click. Clean the edges and contact points of the keyboard and the keyboard tap before reattaching the keyboard to the main unit. DO NOT touch the pad portion in the keyboard tap. 5. Replace the battery compartment cover. 6. Press . 7. Make sure that the message shown on the right appears. 8. Press . 1