Introduction
This manual provides detailed instructions for the Sharp Printing Calculator CS-2635LW. Please read this manual thoroughly before using the calculator to ensure proper operation and to maximize its features. Keep this manual for future reference.

Front view of the Sharp CS-2635LW Printing Calculator, showing the display, keypad, and paper roll mechanism.
Setup
1. Unpacking
Carefully remove the calculator and all accessories from the packaging. Verify that all components are present: the calculator unit, AC adapter, and user manual.
2. Power Connection
Connect the supplied AC adapter to the power input port on the calculator and then plug it into a standard electrical outlet. The calculator operates on electric power and includes a CR2032 backup battery for memory retention.
3. Paper Roll Installation
- Open the paper roll cover.
- Place a new paper roll onto the paper roll holder.
- Feed the end of the paper roll into the printer mechanism until it catches.
- Close the paper roll cover.

The calculator with a paper roll correctly installed, ready for printing.
4. Backup Battery Installation
The calculator uses a CR2032 battery for memory backup. Locate the battery compartment, usually on the underside of the unit. Insert the CR2032 battery with the correct polarity (+/-) as indicated. This battery ensures data retention even when the main power is disconnected.

Rear view of the calculator, showing the power input and potentially the battery compartment location.
Operating Instructions
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 =.
- Press CE to clear the last entry, or C to clear all entries.
2. Special Functions
- Tax Calculation (+/- TAX): Use the dedicated +TAX and -TAX keys for tax calculations. Refer to the full manual for setting tax rates.
- Memory Functions (M+, M-, *M): Use M+ to add to memory, M- to subtract from memory, and *M to recall memory.
- Rounding: The calculator features rounding functions. Consult the full manual for specific rounding settings.
3. Printing
The CS-2635LW features two-color printing (black/red) at 4.3 lines per second. Negative results are highlighted in red for easy identification. Ensure the paper roll is correctly installed and the ink ribbon is functional for optimal printing.

Side view of the calculator, highlighting the ergonomic keypad design.
Maintenance
1. Cleaning
Wipe the calculator's exterior with a soft, dry cloth. For stubborn dirt, use a slightly damp cloth with mild detergent, then wipe dry. Do not use abrasive cleaners or solvents. Keep the display and printer mechanism free of dust and debris.
2. Paper Roll Replacement
When the paper roll is nearly empty, replace it following the steps outlined in the "Paper Roll Installation" section under Setup.
3. Ink Ribbon Replacement
The ink ribbon should be replaced when printouts become faint or colors are inconsistent. Open the printer cover, remove the old ribbon cartridge, and insert a new one, ensuring it is properly seated. Refer to the full manual for detailed instructions specific to ribbon replacement.
4. Backup Battery Replacement
If memory settings are lost when the calculator is unplugged, the CR2032 backup battery may need replacement. Follow the steps in the "Backup Battery Installation" section under Setup.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Calculator does not power on. | AC adapter not connected or faulty. | Ensure AC adapter is securely connected and plugged into a working outlet. Test the outlet with another device. |
| No printout or faint print. | Paper roll empty or incorrectly installed; ink ribbon worn out. | Replace paper roll. Reinstall paper roll correctly. Replace ink ribbon. |
| Incorrect calculation results. | Incorrect input; incorrect mode setting; internal error. | Double-check all entered numbers and operations. Ensure the calculator is in the correct mode (e.g., decimal settings). Try resetting the calculator (refer to the full manual for reset procedures). |
| Memory data lost after power off. | CR2032 backup battery is depleted or missing. | Replace the CR2032 backup battery. |
Specifications
- Model: Sharp CS-2635LW
- Display: 12-digit Digitron display
- Printing Speed: 4.3 lines per second
- Printing Type: Two-color (black/red)
- Power Source: Electric power with CR2032 backup battery
- Dimensions: 36.7 cm (L) x 23.7 cm (W) x 9.7 cm (H)
- Weight: 850 grams
- Key Functions: Tax calculation (+/- TAX), Memory functions (M+, M-, *M), Rounding
- Material: Metal, Plastic
- Compatible Environments: Commercial, Retail, Office
Warranty Information
This Sharp product is covered by a standard manufacturer's warranty. For specific warranty terms, conditions, and duration, please refer to the warranty card included with your product or contact Sharp customer service. Keep your proof of purchase for warranty claims.
Customer Support
For technical assistance, troubleshooting beyond this manual, or service inquiries, please contact Sharp customer support. Contact details can typically be found on the manufacturer's website or in the product packaging. Please have your model number (CS-2635LW) and serial number ready when contacting support.





