Introduction
This manual provides essential information for the safe and effective use of your Heine ML4 LED Headlight System. Please read these instructions carefully before operating the device and retain them for future reference. The Heine ML4 LED Headlight offers powerful, coaxial illumination for various professional applications, featuring an ultra-bright 3SLED, adjustable light intensity, and a portable power supply.
Safety Information
- Eye Safety: Do not look directly into the LED light source. Avoid directing the light into the eyes of patients or other individuals.
- Electrical Safety: Use only the provided Heine mPack and plug-in transformer. Do not use damaged cables or power supplies. Ensure the device is disconnected from power before cleaning.
- Heat: The LED headlight may generate heat during prolonged use. Avoid direct contact with the light housing for extended periods.
- Cleaning: Follow the cleaning instructions carefully to prevent damage to optical components or electronic parts.
- Storage: Store the device in a dry, clean environment, away from extreme temperatures and direct sunlight.
- Modifications: Do not attempt to modify or repair the device. Refer all servicing to authorized personnel.
Package Contents
Verify that all components are present in your package:
- Heine ML4 LED Headlight Unit
- Professional L Headband
- Heine mPack Portable Power Pack
- Plug-in Transformer (100-240 V compatible) with 4 international plugs
- User Manual (this document)
Setup
1. Headband Assembly
- Carefully attach the ML4 LED Headlight unit to the designated mounting point on the Professional L Headband. Ensure it is securely fastened.
- Adjust the headband for a comfortable and stable fit on your head. Use the adjustment knob at the back of the headband to tighten or loosen as needed.
- Position the headlight unit so that the light beam is centered with your line of sight.
2. Power Pack Connection
- Connect the cable from the ML4 LED Headlight to the Heine mPack Portable Power Pack. Ensure a firm connection.
- The mPack can be clipped to a belt or placed in a pocket for portability.
3. Charging the mPack
- Connect the plug-in transformer to the charging port on the mPack.
- Plug the transformer into a suitable electrical outlet (100-240 V).
- The mPack features a charge status display to indicate charging progress and remaining operating charge. A full charge typically takes 2 hours.
- Disconnect the transformer once charging is complete or before use.

This image displays the complete Heine ML4 LED Headlight system. It includes the adjustable headband with the LED headlight unit attached, the mPack portable power pack, and the plug-in transformer for charging. All components are shown in their respective positions, illustrating the full product package.
Operating Instructions
1. Power On/Off
Locate the power button or switch on the mPack. Press or toggle it to turn the headlight on. Repeat the action to turn it off.
2. Brightness Adjustment
The mPack features a stepless light intensity control. Rotate the knob on the mPack to increase or decrease the brightness of the LED headlight. Adjust to an optimal brightness setting to prevent reflections and ensure clear visibility.
3. Spot Size Adjustment
The ML4 LED Headlight allows for adjustment of the light spot size. Locate the adjustment mechanism on the headlight unit and manipulate it to achieve the desired spot diameter (e.g., 30 mm to 80 mm at 420 mm working distance). A smaller diameter is often ideal for ENT and Dental applications.
4. Viewing Angle Adjustment
The angle of declination is stepless and individually adjustable. Use the articulation points on the headlight unit to position the light beam precisely for your examination needs.
5. Optional Yellow Filter
If your system includes an optional yellow filter, attach it to the headlight unit as instructed. This filter reduces blue light, which can be beneficial in certain applications, such as avoiding premature hardening of composites in dentistry.
Maintenance
1. Cleaning
- Headband: The headband can be wiped clean with a damp cloth and mild detergent. Ensure it is completely dry before storage.
- Headlight Unit: Gently wipe the exterior of the headlight unit with a soft, lint-free cloth. For optical surfaces, use a lens cleaning solution and a specialized optical cleaning cloth. Avoid abrasive cleaners or solvents.
- mPack: Wipe the mPack with a damp cloth. Do not immerse in liquids.
2. Storage
When not in use, store the Heine ML4 LED Headlight System in its protective case or a clean, dry environment. Avoid extreme temperatures, humidity, and direct sunlight. Ensure the mPack is partially charged (not fully depleted or fully charged for long-term storage) to prolong battery life.
3. Battery Care
The mPack Portable Power Pack uses a rechargeable battery. To maximize battery life:
- Avoid completely discharging the battery regularly.
- Charge the battery fully before first use.
- If storing for extended periods, charge the battery to approximately 50% every few months.
Troubleshooting
| Problem | Possible Cause | Solution |
|---|---|---|
| Headlight does not turn on | mPack battery is depleted; Loose connection; Faulty mPack or headlight | Charge the mPack; Check all cable connections; Contact authorized service for repair. |
| Light is dim or flickers | Low battery; Loose connection; LED nearing end of life | Charge the mPack; Check connections; Contact authorized service for replacement. |
| Spot size adjustment is stiff | Accumulated dust or debris; Mechanical issue | Gently clean the mechanism; Do not force adjustment; Contact authorized service. |
| mPack not charging | Transformer not connected properly; Faulty transformer or mPack | Ensure transformer is securely plugged into mPack and wall outlet; Test with another outlet; Contact authorized service. |
Specifications
- Illumination: Up to 50,000 lux at a working distance of 250 mm
- Color Temperature: 6,250 Kelvin
- LED Operating Life: 1 W Super-High Output LED rated at up to 50,000 hours
- Spot Adjustment: 30 mm to 80 mm at 420 mm working distance
- Angle of Declination: Stepless and individually adjustable
- Power Source: Corded Electric (via mPack and transformer)
- Special Feature: Portable
- Material: Glass (for optics)
- Transformer Compatibility: 100 – 240 V
Warranty and Support
This Heine product is manufactured to high-quality standards. For specific warranty information, please refer to the warranty card included with your purchase or contact your authorized Heine dealer. For technical support, service, or spare parts, please contact your local Heine representative or visit the official Heine website.





