1. Introdución
This manual provides instructions for the proper use and maintenance of your Texas Instruments TI-503SV Pocket Calculator. The TI-503SV is an 8-digit LCD display calculator designed for basic arithmetic operations, making it suitable for everyday calculations.

Figure 1: The Texas Instruments TI-503SV Pocket Calculator, showing its 8-digit LCD display and keypad layout.
2. Configuración
2.1 Instalación da batería
The TI-503SV calculator is powered by batteries. To install or replace batteries:
- Localiza a tapa do compartimento das pilas na parte traseira da calculadora.
- Using a small screwdriver or coin, gently open the battery compartment.
- Insert the required batteries, ensuring correct polarity (+ and - terminals). Refer to the markings inside the compartment.
- Pecha a tapa do compartimento da batería de forma segura.
The calculator is designed for immediate use upon battery installation. No additional setup is typically required.
3. Instrucións de funcionamento
This section details the basic functions and operations of the TI-503SV calculator.
3.1 Encendido/apagado
- Para activar a calculadora, prema o botón ON/C chave.
- The calculator will automatically power off after approximately 5-10 minutes of inactivity to conserve battery life.
3.2 Operacións aritméticas básicas
Enter numbers using the numeric keypad and perform operations as follows:
- Suma (+): Introduza o primeiro número, prema +, introduza o segundo número, prema =.
- Resta (-): Introduza o primeiro número, prema -, introduza o segundo número, prema =.
- Multiplicación (x): Introduza o primeiro número, prema x, introduza o segundo número, prema =.
- División (÷): Introduza o primeiro número, prema ÷, introduza o segundo número, prema =.
3.3 Funcións limpas
- Borrar entrada (CE): Clears the last entered number or operation without affecting previous calculations. Pressing CE once clears the current entry.
- Borrar todo (ON/C): Clears all entries and operations, resetting the calculator to zero. Pressing ON/C twice (or once if no entry) clears everything.
3.4 Funcións de memoria
The calculator includes memory functions to store and recall values.
- Memory Plus (M+): Engade o valor mostrado á memoria.
- Memory Minus (M-): Resta da memoria o valor mostrado.
- Memory Recall/Clear (MRC):
- Press once to recall the value stored in memory.
- Press twice to clear the memory (sets memory to zero).
3.5 Outras funcións
- Porcenttage (%): Usado para porcentaxestage cálculos. Por example, to calculate 10% of 50: enter 50, press x, introduza 10, prema %.
- Square Root (√): Calculates the square root of the displayed number. Enter number, press √.
- Cambio de sinal (+/-): Cambia o signo do número mostrado de positivo a negativo ou viceversa.
4. Mantemento
4.1 Limpeza
Para limpar a calculadora, use un pano suave e seco. Para a sucidade persistente, dóreo lixeiramenteampen the cloth with water or a mild, non-abrasive cleaner. Avoid using harsh chemicals, solvents, or abrasive materials, as these can damage the display or casing.
4.2 Substitución da batería
When the display becomes dim or the calculator functions erratically, it is likely time to replace the batteries. Refer to section 2.1 Instalación da batería for instructions. Always dispose of used batteries responsibly according to local regulations.
4.3 Almacenamento
Store the calculator in a cool, dry place away from direct sunlight, extreme temperatures, and high humidity. If storing for an extended period, it is recommended to remove the batteries to prevent leakage.
5 Solución de problemas
If you encounter issues with your TI-503SV calculator, refer to the following common problems and solutions:
| Problema | Causa posible | Solución |
|---|---|---|
| A pantalla está en branco ou escura. | Pilas baixas ou agotadas. | Substitúa as pilas. Comprobe a polaridade correcta. |
| A calculadora non se acende. | Sen baterías, baterías descargadas ou baterías instaladas incorrectamente. | Check battery installation and replace if necessary. Press ON/C. |
| Resultados de cálculo incorrectos. | Incorrect key entry, or previous calculation not cleared. | Preme ON/C twice to clear all and re-enter calculation. Verify input. |
| As teclas non responden. | Dirt or debris under keys, or internal malfunction. | Gently clean around keys. If problem persists, contact support. |
6. Especificacións
Key specifications for the Texas Instruments TI-503SV Pocket Calculator:
- Modelo: TI-503SV
- Tipo de visualización: LCD de 8 díxitos
- Fonte de enerxía: Alimentado por batería
- Tipo de calculadora: Función estándar
- Dimensións do produto: 1 x 1 x 1 polgadas (aproximado)
- Peso do artigo: 3.2 onzas (aproximadamente)
- Fabricante: Texas Instruments
7. Garantía e soporte
For warranty information or technical support, please refer to the documentation included with your purchase or visit the official Texas Instruments websitio. Garda o comprobante de compra para reclamacións de garantía.
Official Texas Instruments Websitio: educación.ti.com