Lefavor KSD110 / 936R Digital Thermostat Soldering Iron Kit Instruction Manual

Important Safety Warnings

Please read this manual carefully before use to prevent accidents and injuries.

• WARNING: Misuse may lead to death or serious injury.
• CAUTION: Misuse may cause physical injury or damage to property.
• Always use a grounded power cord and plug the device into a three-hole grounded socket. Do not modify the plug or use ungrounded adapters.
• The soldering tip becomes extremely hot. Do not touch the soldering tip or nearby metal parts when the iron is powered on or cooling down.
• Inform others in the vicinity that the soldering iron is in use and hot.
• Unplug the soldering iron and allow it to cool completely before changing tips or performing maintenance.
• Do not use the soldering iron near flammable or explosive materials.
• Do not use the soldering iron with wet hands or pull the power cord forcefully.
• Do not use the soldering iron for tasks other than soldering.
• Do not strike the soldering iron against the workbench to remove residual solder, as this can severely damage the iron.
• Do not modify the soldering iron or replace parts with non-original components. Use original factory parts for replacements.
• Keep out of reach of children.

Product Features

• Compact design with three buttons for powerful functionality.
• Rapid heating and temperature recovery.
• High-quality ceramic heating element.
• Two temperature display modes: Celsius (°C) and Fahrenheit (°F).
• Microcomputer temperature compensation.
• Power cord made of high-temperature resistant, soft, and insulated material.
• Clear LED display for easy monitoring.
• Handle made of imported engineering materials, highly resistant to high temperatures and ESD anti-static treatment.
• Password management function.

Package Contents

The Lefavor Digital Thermostat Soldering Iron Kit typically includes:

• Digital Thermostat Soldering Iron (80W or 120W model)
• Soldering Iron Stand
• Cleaning Sponge
• Solder Wire
• Desoldering Pump
• Tweezers (ESD-15)
• Assorted Soldering Tips (e.g., B, 2.4D, I, 3C, K types)

Setup Instructions

1. Install Soldering Tip:
   Unscrew the retaining nut at the base of the soldering iron tip. Insert the desired soldering tip into the heating element. Ensure it is seated correctly. Screw the retaining nut back on firmly, but do not overtighten.
   

   

2. Prepare Cleaning Sponge:
   Slightly dampen the cleaning sponge with water. The sponge will expand when wet. It should be moist, not dripping wet.
   

   

   

3. Place Soldering Iron on Stand:
   Always place the soldering iron securely on its stand when not in use to prevent accidental burns or damage.
4. Connect Power:
   Plug the soldering iron into a suitable grounded power outlet (110V US PLUG or 220V EU PLUG, depending on your model). Upon connection, the iron will enter a standby/sleep state, and the LED display will be off.
   

   

Operating Instructions

1. Power On:
   Long press the middle '#' button (often marked with a star or power symbol) for more than 3 seconds. The system will perform a self-check (LEDs will light up for 2 seconds), then enter normal working mode.
   

   

   

2. Temperature Adjustment:
   Use the '+' button to increase the temperature and the '-' button to decrease it. A single press adjusts the temperature incrementally. Hold the '+' or '-' button for more than 2 seconds for rapid temperature adjustment.
   

   

3. Celsius/Fahrenheit Switching:
   Double-click the middle '#' button to switch between Celsius (°C) and Fahrenheit (°F) display modes. The display will flash, indicating the change, and the new setting will be saved automatically.
   

   

4. Soldering Technique:
   Apply a small amount of solder to the tip to 'tin' it. Bring the hot tip into contact with both the component lead and the PCB pad simultaneously. Feed solder onto the joint, not directly onto the iron tip. Remove the solder wire, then remove the iron. Allow the joint to cool naturally.
   

   

5. Power Off:
   Long press the middle '#' button for more than 3 seconds during operation. The heating will stop, and the iron will enter sleep mode with the LED display off.

Advanced Functions

Temperature Calibration

If the displayed temperature differs from the actual measured temperature, you can calibrate the iron:

1. In normal working state, press and hold the '-' and '+' buttons simultaneously for less than 5 seconds to enter calibration mode. The display will show a flashing value.
2. Use the '+' button to increase the calibration value or the '-' button to decrease it. This value represents the temperature compensation (±99 units, where 1 unit is approximately 1°C or 1.8°F).
3. Press the '-' button to save the setting. The system will automatically exit calibration mode after 5 seconds of inactivity and return to normal operation.

Sleep Setting

The soldering iron features an intelligent sleep function. When the iron is idle for a set period, it will enter sleep mode to conserve energy and prolong tip life. You can adjust the sleep settings:

1. Press and hold the '-' button for 3-5 seconds to enter the function mode.
2. Lightly press the '-' button to cycle through options until the sleep icon ('SLP') is displayed.
3. Use the '+' and '-' buttons to adjust the sleep time (e.g., change the hundred, ten, or individual digit values).
4. Press the '-' button again to save the setting.

Password Management

The soldering iron includes a password management feature to prevent unauthorized changes to settings.

Initial Password Setting:

1. With the power disconnected, press and hold the '+' button, then connect the power. The LED display will show '---', indicating entry into password setting mode.
2. The default initial password is '000'. To set a new password, use the '+' button to change the digit value and the '-' button to shift to the next digit.
3. Once the desired password is set, press and hold the '-' button to confirm and exit.

Unlocking with Password:

If a password is set, you must enter it to access certain settings. The process involves holding the '+' button while powering on, then entering the correct password using the '+' and '-' buttons.

Forgotten Password Recovery:

If you forget your password, you can reset it:

1. Follow the steps to enter password setting mode (hold '+' while plugging in).
2. Enter the unlock password '123'. If correct, you can proceed to modify or clear the password.
3. Alternatively, entering '321' will clear the original password to '000'.

Maintenance

• Tip Cleaning: Regularly wipe the soldering tip on the damp cleaning sponge to remove oxidation and old solder. This helps maintain good heat transfer and extends tip life.
• Tip Tinning: After cleaning and before storing, always 'tin' the tip with a fresh layer of solder to prevent oxidation.
• Tip Replacement: When the soldering tip wears out or becomes damaged, replace it with a new one. Ensure the iron is unplugged and cool before attempting to replace the tip.
• General Cleaning: Keep the soldering iron handle and body clean and free from dust and debris.
• Storage: Store the soldering iron in a dry, safe place, away from moisture and extreme temperatures.

Troubleshooting

Common Issues & Solutions:

• Iron not heating / Displaying 'H-3' or 'HE' error:
  This often indicates an issue with the heating element or its connection.
• Ensure the soldering tip is correctly installed and the retaining nut is tightened. Loose connections can cause this error.
• Check if the heating element is properly seated.
• If the issue persists, the heating element might be faulty and require replacement.
• Temperature not stable or inaccurate:
• Perform a temperature calibration as described in the 'Advanced Functions' section.
• Ensure the soldering tip is clean and properly tinned. Oxidation can affect temperature accuracy.
• Soldering iron not turning on:
• Check the power connection and ensure the outlet is working.
• Ensure you are long-pressing the '#' button for more than 3 seconds to power on.
• Solder not melting easily:
• Increase the temperature setting.
• Clean and re-tin the soldering tip.
• Ensure you are using appropriate solder for your application.

Specifications

User Tips

• Optimal Temperature: For best results and to protect the soldering tip, use the lowest effective temperature for your soldering task. Higher temperatures can degrade the tip faster.
• Ventilation: Always work in a well-ventilated area. Soldering fumes can be harmful. Consider using a fume extractor or working near an open window.
• Tip Care: Keep your soldering tip clean and tinned. A dirty or oxidized tip will not transfer heat efficiently, making soldering difficult.
• Error H-3/HE: If you encounter an 'H-3' or 'HE' error, first check that the soldering tip and heating element are securely installed. If the issue persists, it may indicate a fault with the heating element.
• Material Compatibility: While soldering irons are primarily for electronics, some users inquire about soldering iron and aluminum. Standard soldering irons are generally not suitable for aluminum without specialized flux and solder, and even then, it can be challenging.

Warranty and Support

For detailed warranty information, please refer to the official product documentation provided by the seller. General support and troubleshooting can often be found in the comprehensive user manual available as a PDF:

For a complete user manual, please refer to the User Manual (PDF).