1. Introduction
Thank you for choosing the Olivetti Logos 804t Thermal 14-Digit Bivolt Calculator. This manual provides essential information for the proper setup, operation, and maintenance of your new calculator. Please read this manual thoroughly before using the device to ensure optimal performance and safety.
2. Safety Information
- Always connect the calculator to a power outlet with the correct voltage. This device supports bivolt (dual voltage) input.
- Do not expose the calculator to moisture, rain, or extreme temperatures.
- Avoid dropping the calculator or subjecting it to strong impacts.
- Do not attempt to disassemble or repair the calculator yourself. Refer all servicing to qualified personnel.
- Keep the calculator away from direct sunlight and heat sources.
- Use only Olivetti-approved thermal paper rolls for printing.
3. Product Overview
The Olivetti Logos 804t is a high-performance 14-digit calculator designed for efficiency and ease of use. It features a fast thermal printer and a clear, backlit LCD display.
Figure 3.1: Front view of the Olivetti Logos 804t Thermal Calculator, showing the keyboard, display, and paper roll compartment.
Key Features:
- 14-Digit LCD Display: Two-color backlit for enhanced visibility.
- Fast Thermal Printer: Prints at a speed of 10 lines per second.
- User-Friendly Keyboard: Designed for comfortable and efficient data entry.
- Bivolt Power Supply: Compatible with various electrical power inputs.
- Advanced Functions: Includes cost margin, tax rate calculation, currency conversion, and data correction.
4. Setup
4.1 Power Connection
- Ensure the calculator is placed on a stable, flat surface.
- Locate the power input port on the back of the calculator.
- Connect the provided power cord to the calculator and then to a suitable electrical outlet. The Olivetti Logos 804t features a bivolt power supply, adapting to different voltage standards.
- Press the ON/OFF button to power on the calculator.
4.2 Installing the Thermal Paper Roll
- Open the printer cover, usually located at the top rear of the calculator.
- Insert a new thermal paper roll into the compartment, ensuring the paper feeds from the bottom of the roll.
- Pull a small length of paper out and feed it through the printer mechanism slot.
- Close the printer cover securely. The paper should emerge from the top of the cover.
5. Operating Instructions
This section details the primary functions and operations of your Olivetti Logos 804t calculator.
5.1 Basic Calculations
- Addition (+): Enter the first number, press +, enter the second number, press =.
- Subtraction (-): Enter the first number, press -, enter the second number, press =.
- Multiplication (x): Enter the first number, press x, enter the second number, press =.
- Division (/): Enter the first number, press /, enter the second number, press =.
5.2 Percentage and Variation Calculation
To calculate percentages or variations, use the % key in conjunction with other arithmetic operations. Consult the on-screen prompts or a quick reference guide for specific sequences.
5.3 Tax Rate Calculation
The calculator allows for quick tax calculations. Set the tax rate using the designated function (refer to the calculator's display for prompts), then apply it to values using the TAX+ or TAX- keys.
5.4 Currency Conversion
To convert currencies, you must first program the exchange rate. Once set, use the dedicated currency conversion keys to switch between currencies.
5.5 Cost Margin Function
This function helps calculate profit margins. Input your cost and selling price, then use the COST/SELL/MARGIN keys to determine the margin.
5.6 Data Correction (Call Function)
The Logos 804t includes a data correction feature, often referred to as a "call function," allowing you to review and correct previously entered data before finalizing a calculation. Press the CALL key to access this feature.
6. Maintenance
6.1 Cleaning
- Disconnect the calculator from the power source before cleaning.
- Use a soft, dry cloth to wipe the exterior of the calculator.
- For stubborn dirt, slightly dampen the cloth with water or a mild, non-abrasive cleaner. Do not spray liquids directly onto the calculator.
- Clean the display gently with a soft, lint-free cloth.
6.2 Thermal Paper Roll Replacement
When the paper roll is nearing its end, a red line may appear on the paper, indicating it's time for replacement. Follow the steps in Section 4.2 to install a new roll.
7. Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Calculator does not power on. | Power cord not connected or power outlet issue. | Ensure the power cord is securely connected to both the calculator and a working electrical outlet. Test the outlet with another device. |
| Printer is not printing. | No paper, paper jammed, or incorrect paper type. | Check if the thermal paper roll is installed correctly and has enough paper. Clear any paper jams. Ensure you are using thermal paper. |
| Display shows an error message. | Invalid operation or overflow. | Clear the error by pressing the C/CE key. Review your calculation steps. |
| Incorrect calculation results. | Incorrect data entry or function usage. | Double-check your input values and ensure you are using the correct functions for your calculation. Utilize the data correction feature if available. |
8. Specifications
- Model: Olivetti Logos 804t
- Display: 14-Digit LCD, 2-color backlit
- Printing Speed: 10 lines per second
- Power Source: Bivolt electrical cable
- Dimensions: 41 x 26 x 12 cm (16.1 x 10.2 x 4.7 inches)
- Weight: 1.49 kg (3.28 lbs)
- Material: Plastic
- Type: Financial Calculator
9. Warranty and Support
For warranty information and technical support, please refer to the documentation included with your purchase or visit the official Olivetti website. Keep your purchase receipt as proof of purchase for warranty claims.
For further assistance, you may contact Olivetti customer service through their official channels.