Sharp EL-2135 12-Digit Electronic Desktop Calculator User Manual

1. ບົດແນະນຳ

This manual provides detailed instructions for the proper use and maintenance of your Sharp EL-2135 12-digit electronic desktop calculator. Designed for general purpose calculations, this lightweight and ergonomically designed calculator is ideal for both school and office environments. It features a clear 12-digit LCD display and operates efficiently with dual power sources.

2. ຄຸນນະສົມບັດທີ່ສໍາຄັນ

• ຈໍສະແດງຜົນ LCD 12 ຕົວເລກ: Provides clear and easy-to-read numerical output.
• Comfortable Desktop Size: Optimized dimensions for stable and convenient use on any desk.
• Elegant Gray Body: Durable ABS plastic construction with a professional aesthetic.
• Square Root Function: Dedicated button for quick square root calculations.
• ແຫຼ່ງພະລັງງານຄູ່: Operates on both solar power and a lithium-ion battery, ensuring functionality even in low light conditions.

3. ຕັ້ງຄ່າ

3.1 ການເປີດເຄື່ອງ

The Sharp EL-2135 calculator utilizes a dual power system: solar and battery. It will automatically draw power from the solar cell when sufficient light is available. In dim lighting or darkness, the included lithium-ion battery will provide power. No manual power-on switch is typically required; the calculator activates upon light exposure or key press.

3.2 ການຕິດຕັ້ງ/ປ່ຽນແບັດ

The calculator comes with a lithium-ion battery pre-installed. If battery replacement becomes necessary:

1. Ensure the calculator is off or in a well-lit area to utilize solar power.
2. ຊອກຫາຊ່ອງໃສ່ຫມໍ້ໄຟຢູ່ດ້ານຫຼັງຂອງໜ່ວຍ.
3. ເປີດຝາປິດຢ່າງລະມັດລະວັງ.
4. Remove the old battery and insert a new CR2032 lithium-ion battery, ensuring correct polarity (+/-).
5. ປິດຝາປິດຊ່ອງໃສ່ຫມໍ້ໄຟຢ່າງປອດໄພ.

Note: Dispose of used batteries according to local regulations.

4. ຄໍາແນະນໍາການດໍາເນີນງານ

4.1 ການດຳເນີນງານທາງຄະນິດສາດພື້ນຖານ

Perform addition, subtraction, multiplication, and division using the dedicated keys:

• ເພີ່ມ (+): ໃສ່ຕົວເລກທໍາອິດ, ກົດ +, ໃສ່ຕົວເລກທີສອງ, ກົດ =.
• ການຫັກລົບ (-): ໃສ່ຕົວເລກທໍາອິດ, ກົດ -, ໃສ່ຕົວເລກທີສອງ, ກົດ =.
• ການຄູນ (×): ໃສ່ຕົວເລກທໍາອິດ, ກົດ ×, ໃສ່ຕົວເລກທີສອງ, ກົດ =.
• ພະແນກ (÷): ໃສ່ຕົວເລກທໍາອິດ, ກົດ ÷, ໃສ່ຕົວເລກທີສອງ, ກົດ =.

4.2 ໜ້າທີ່ພິເສດ

• ຮາກຂັ້ນສອງ (√): Enter a number, then press the √ key to calculate its square root.
• ເປີເຊັນtage (%): ໃຊ້ສໍາລັບເປີເຊັນtage ການ​ຄິດ​ໄລ່​. ຕົວຢ່າງample, ເພື່ອຄິດໄລ່ 10% ຂອງ 200: ໃສ່ 200, ກົດ ×, ໃສ່ 10, ກົດ %.
• Grand Total (GT): Accumulates the results of all calculations performed after the last GT clear. Press GT ເພື່ອສະແດງຜົນລວມທັງໝົດ.
• Mark-up/Mark-down (MU): ໃຊ້ສຳລັບການຄິດໄລ່ອັດຕາກຳໄລ.
• ແຈ້ງ​ການ​ເຂົ້າ (CE): ລຶບລ້າງຕົວເລກ ຫຼືການດຳເນີນການທີ່ປ້ອນເຂົ້າຫຼ້າສຸດໂດຍບໍ່ສົ່ງຜົນກະທົບຕໍ່ການຄຳນວນທີ່ຜ່ານມາ.
• Clear All (CA): Clears all entries and calculations, resetting the calculator.
• Memory Plus (M+): ເພີ່ມຄ່າທີ່ສະແດງໃຫ້ກັບຫນ່ວຍຄວາມຈໍາ.
• Memory Minus (M-): ລົບຄ່າທີ່ສະແດງອອກຈາກຫນ່ວຍຄວາມຈໍາ.
• Recall Memory (RM): Displays the value currently stored in memory.
• Clear Memory (CM): ລຶບຄວາມຊົງຈຳ.

4.3 ຈໍສະແດງຜົນ

The 12-digit LCD display shows numbers clearly. If the result of a calculation exceeds 12 digits, an error indicator may appear, or the number may be displayed in scientific notation if supported.

5. ບໍາລຸງຮັກສາ

5.1 ການທໍາຄວາມສະອາດ

ເພື່ອເຮັດຄວາມສະອາດເຄື່ອງຄິດເລກ, ໃຊ້ຜ້າອ່ອນໆ, ແຫ້ງ. ສໍາລັບຝຸ່ນ stubborn, ເລັກນ້ອຍ dampen the cloth with water or a mild, non-abrasive cleaner. Avoid using harsh chemicals, solvents, or abrasive materials, as these can damage the casing ແລະສະແດງ.

5.2 ການເກັບຮັກສາ

Store the calculator in a cool, dry place away from direct sunlight and extreme temperatures. Prolonged exposure to heat or cold can affect battery life and electronic components. When not in use for extended periods, ensure it is stored in a manner that prevents accidental key presses.

6. ການແກ້ໄຂບັນຫາ

• ຈໍສະແດງຜົນຫວ່າງເປົ່າ ຫຼືມືດ:
  • Ensure the calculator is in a well-lit area for solar power.
  • Check if the battery needs replacement. Refer to Section 3.2.
• ການ​ຄິດ​ໄລ່​ທີ່​ບໍ່​ຖືກ​ຕ້ອງ​:
  • ກົດ CA (Clear All) button to reset the calculator.
  • Verify that you are entering numbers and operations correctly.
• ປຸ່ມບໍ່ຕອບສະໜອງ:
  • Clean the keys and surrounding areas to remove any debris.
  • If the issue persists, the calculator may require professional servicing.

7. ຂໍ້ມູນຈໍາເພາະ

8. ຮູບພາບຜະລິດຕະພັນ

9. ການຮັບປະກັນແລະການສະຫນັບສະຫນູນ

For warranty information, please refer to the documentation included with your purchase or contact your retailer. For technical support or service inquiries, please visit the official Sharp webເວັບໄຊ ຫຼືຕິດຕໍ່ພະແນກບໍລິການລູກຄ້າຂອງເຂົາເຈົ້າ. ຮັກສາໃບຮັບເງິນການຊື້ຂອງທ່ານໄວ້ເປັນຫຼັກຖານການຊື້ສໍາລັບການຮຽກຮ້ອງການຮັບປະກັນໃດໆ.