Introduction
This manual provides comprehensive instructions for the setup, operation, maintenance, and troubleshooting of your Sharp QS-2770H Two-Color Printing Calculator. Please read this manual thoroughly to ensure proper use and to maximize the lifespan of your device.
Figure 1: Front view of the Sharp QS-2770H Printing Calculator, showing the display, keyboard, and paper roll.
Setup
1. Power Connection
The Sharp QS-2770H calculator is AC-powered. Connect the provided AC adapter to the power input port on the back of the calculator and then plug it into a standard electrical outlet. Ensure the power switch is in the OFF position before connecting.
2. Paper Roll Installation
- Lift the paper roll arm located at the top rear of the calculator.
- Place a new paper roll (standard 2-1/4 inch width) onto the paper roll holder, ensuring the paper feeds from the bottom of the roll.
- Feed the leading edge of the paper into the printer slot until it emerges from the front of the printer mechanism.
- Lower the paper roll arm back into position.
Figure 2: Side view illustrating the paper roll installation area.
3. Ink Ribbon Installation/Replacement
The calculator uses a two-color ink ribbon (Victor ink ribbon 7010 or equivalent). To install or replace:
- Ensure the calculator is turned off.
- Gently open the printer cover.
- Remove the old ribbon cartridge if present.
- Insert the new ribbon cartridge, ensuring the ribbon is properly threaded through the guides and positioned correctly over the print head. Refer to the diagram on the ribbon cartridge for correct orientation.
- Close the printer cover securely.
4. Initial Settings
Before first use, or after a power interruption, you may need to set the date, decimal point, and rounding settings. Consult the specific key functions on your calculator's keyboard for these adjustments (e.g., DATE key, decimal selector switch).
Operating Instructions
The Sharp QS-2770H features a professional keyboard layout designed for efficient data entry and calculations.
Basic Operations
- Addition/Subtraction: Enter numbers and press + or -.
- Multiplication/Division: Enter numbers and press x or ÷. Press = to display the result.
- Clear Entry (CE): Clears the last entered number.
- Clear All (C/AC): Clears all entries and calculations.
Advanced Functions
- Grand Total (GT): Accumulates results of all calculations. Press GT to display the grand total.
- Markup (MU): Used for cost-sell-margin calculations.
- Percent Changes (%): Calculates percentage increases or decreases.
- Automatic Tax Keys (TAX+, TAX-): Pre-set tax rates for quick tax calculations. Refer to your calculator's specific instructions for setting tax rates.
- Change Sign (+/-): Changes the sign of the displayed number.
- Item Count: Automatically counts the number of entries.
- Memory Functions (M+, M-, MR, MC): Store, recall, add to, or subtract from memory. The QS-2770H features two independent 4-key memories.
The large, fluorescent display provides clear visibility of numbers and operational symbols. The 4.8 lines-per-second ribbon printer ensures fast and legible printouts of your calculations.
Maintenance
Cleaning
To maintain the calculator's appearance and functionality, regularly wipe the exterior with a soft, dry cloth. For stubborn dirt, a slightly damp cloth can be used, but ensure no liquid enters the device. Do not use abrasive cleaners or solvents.
Ribbon and Paper Roll Replacement
Replace the ink ribbon when printouts become faint or inconsistent. Refer to the "Ink Ribbon Installation/Replacement" section under Setup for detailed steps. Replace the paper roll when it runs out, following the "Paper Roll Installation" steps.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Display shows "E" or error code. | Calculation overflow, invalid operation, or internal error. | Press C/AC to clear the error and restart the calculation. Ensure numbers are within the 12-digit capacity. |
| No printout or faint print. | Paper roll empty, paper not loaded correctly, or ink ribbon needs replacement. | Check paper roll and reload if necessary. Replace ink ribbon (Victor ink ribbon 7010). Ensure print mode is enabled. |
| Calculator does not power on. | Power cord not connected, or power outlet issue. | Verify AC adapter is securely connected to both the calculator and a working electrical outlet. |
If problems persist after attempting these solutions, please contact Sharp customer support.
Specifications
Figure 3: Dimensions of the Sharp QS-2770H Printing Calculator.
| Feature | Detail |
|---|---|
| Model Name | QS-2770H 12-Digit Professional Heavy-Duty Commercial Printing Calculator |
| Display | 12-Digit Fluorescent Display |
| Printing Speed | 4.8 lines-per-second |
| Printing Colors | Two-color (Black/Red) |
| Power Source | AC Supply |
| Product Dimensions | 13.3 x 10 x 3 inches (L x W x H) |
| Item Weight | 4.8 pounds |
| Compatible Ribbon | Victor ink ribbon 7010 |
| Key Functions | Date, Markup, Percent Changes, Automatic Tax, Grand Total, Item Count, Change Sign, Two Independent 4-Key Memories |
Warranty and Support
Warranty information for the Sharp QS-2770H Printing Calculator is typically included with your purchase documentation. Please refer to the warranty card or contact Sharp customer service for details regarding coverage and terms.
For technical support, service, or additional inquiries, please visit the official Sharp Calculators store or contact their customer support channels. You can find more information at the Sharp Store on Amazon.
