•Never try to take the calculator apart.
•Use a soft, dry cloth to clean the exterior of the calculator.
•Whenever discarding the calculator or batteries, be sure to do so in accordance with the laws and regulations in your particular area.
* Company and product names used in this manual may be registered trademarks or trademarks of their respective owners.
Removing the Hard Case
Before using the calculator, slide its hard case downwards to remove it, and then affix the hard case to the back of the calculator as shown in the illustration nearby.
Turning Power On and Off
Press O to turn on the calculator.
Press 1A(OFF) to turn off the calculator.
Auto Power Off
Your calculator will turn off automatically if you do not perform any operation for about 10 minutes. If this happens, press the Okey to turn the calculator back on.
Adjusting Display Contrast 
Display the CONTRAST screen by performing the following key operation: 1N(SETUP)c8(]CONT'). Next, use d and e to adjust contrast. After the setting is the way you want, press A.
Important: If adjusting display contrast does not improve display readability, it probably means that battery power is low. Replace the battery.
Key Markings
Pressing the 1 or S key followed by a second key performs the alternate function of the second key. The alternate function is indicated by the text printed above the key.
The following shows what the different colors of the alternate function key text mean.
Alternate function
s
Keycap function
If key marking text | It means this: | |
is this color: | ||
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Yellow | Press 1 and then the key to access the | |
applicable function. | ||
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Red | Press S and then the key to input the | |
applicable variable, constant, or symbol. | ||
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Purple (or enclosed | Enter the CMPLX Mode to access the function. | |
in purple brackets) | ||
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Green (or enclosed in | Enter the | |
green brackets) | ||
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