1. Introduction
This user manual provides detailed instructions for the JINGHAO D590 Hearing Amplifiers. Designed for individuals with mild to moderate hearing loss, these rechargeable BTE (Behind-The-Ear) devices offer clear sound amplification with noise-canceling capabilities and a convenient charging dock. Please read this manual thoroughly to ensure proper use, maintenance, and optimal performance of your hearing amplifiers.
Image 1.1: JINGHAO D590 Hearing Amplifiers with Charging Dock.
2. Package Contents
Verify that all items listed below are included in your package:
- JINGHAO D590 Hearing Devices (2 units)
- Charging Dock
- User Manual
- Portable Case
- Earphone Domes (3 pairs of various sizes)
- Cleaning Brush
- USB Charging Cable (Type-C)
Image 2.1: All components included in the JINGHAO D590 package.
3. Product Overview
Familiarize yourself with the components and controls of your JINGHAO D590 Hearing Amplifiers.
3.1 Hearing Amplifier Components
Image 3.1: Detailed view of the hearing amplifier, showing the Multi-function buttons, MIC, Ear tube, and Receiver/Ear dome.
- Multi-function button (+): Volume Up / Mode Switch
- Multi-function button (-): Volume Down / Power On/Off
- MIC: Microphone for sound input.
- Ear tube: Connects the main unit to the ear dome.
- Receiver/Ear dome: Delivers amplified sound into the ear canal.
3.2 Charging Dock
Image 3.2: The charging dock with indicator lights for charging status.
- Charging Slots: Place hearing amplifiers here for charging.
- Hearing aid Indicator light: Indicates charging status (Yellow: Charging, Green: Fully Charged).
4. Setup
4.1 Initial Charging
Before first use, fully charge your hearing amplifiers. Connect the USB charging cable to the charging dock and a power source. Place the hearing amplifiers into the charging slots. The indicator light will turn yellow during charging and green when fully charged. A full charge takes approximately 2 hours and provides about 20 hours of use.
4.2 Selecting and Inserting Ear Domes
Choosing the correct ear dome size is crucial for comfort and sound quality. Experiment with the provided ear domes to find the size that fits snugly and comfortably in your ear canal, creating a good seal to prevent feedback (whistling).
- Select an ear dome size that feels comfortable and provides a secure fit.
- Attach the selected ear dome firmly to the receiver end of the ear tube.
- Gently insert the ear dome into your ear canal, ensuring it fits snugly. The main unit of the hearing amplifier should rest comfortably behind your ear.
5. Operation
5.1 Power On/Off
To power on the device, long press the volume "-" button. To power off, long press the volume "-" button again.
Image 5.1: Powering on/off and adjusting volume using the multi-function buttons.
5.2 Volume Adjustment
Use the "+" and "-" buttons to adjust the volume. There are 6 levels of volume adjustment. Adjust gradually to a comfortable listening level.
5.3 Mode Selection
The JINGHAO D590 offers three distinct listening modes to adapt to various environments. Short press the volume "+" button to cycle through the modes:
- Standard Mode: Ideal for regular conversations in everyday settings.
- Conversation Mode: Optimized for low volume environments, ensuring softer voices are heard more clearly (e.g., meetings).
- Outdoor Mode: Designed for traffic or varying ambient sounds, providing clearer sound in noisy outdoor environments.
Image 5.2: Explanation of the three available listening modes.
6. Maintenance
Regular cleaning and proper care will extend the lifespan and ensure optimal performance of your hearing amplifiers.
- Daily Cleaning: Use the provided cleaning brush to gently remove any earwax or debris from the ear domes and the sound outlet.
- Wipe Down: Wipe the main unit with a soft, dry cloth. Do not use water or cleaning solutions directly on the device.
- Storage: When not in use, store the hearing amplifiers in their charging dock or portable case to protect them from dust and damage.
- IP54 Water & Dust Resistance: The device has an IP54 rating, meaning it is protected against splashes, sweat, and dust accumulation. However, it is not waterproof and should not be submerged in water.
Image 6.1: The JINGHAO D590 features IP54 water and dust resistance.
7. Troubleshooting
This section addresses common issues you might encounter and their solutions.
| Problem | Possible Cause | Solution |
|---|---|---|
| Background noise / Static sound | Normal electric current sound, especially at higher amplification levels. | Insert the device into your ear before turning it on. Gradually increase the volume. Users typically adapt to this sound within 2-3 weeks. |
| Squealing / Whistling (Feedback) | Ear dome not properly inserted or air leakage around the ear dome. | Ensure the ear dome is correctly sized and fits snugly in the ear canal. Turn on the device only after it is securely in your ear. |
| Device not charging normally | Poor connection between the hearing amplifier and the charging dock. | Slightly adjust the position of the hearing amplifiers in the charging dock to ensure a perfect connection. The indicator light should turn yellow when connected properly. |
| Low or no sound | Low battery, ear dome blocked by wax, or incorrect volume setting. | Charge the device fully. Clean the ear dome and sound outlet thoroughly. Increase the volume using the "+" button. |
8. Specifications
Technical specifications for the JINGHAO D590 Hearing Amplifiers:
| Parameter | Value |
|---|---|
| Product Name | Hearing Aid |
| Product Color | Classic Grey |
| Applicable Objects | Mainly suitable for people with mild and moderate hearing loss |
| Maximum OSPL90 | ≤120dB+3dB |
| High Frequency Average | 108dB±4dB |
| Full Range Sound Gain | 25dB±5dB |
| Frequency Response Range | 400Hz～3000Hz |
| Equivalent Input Noise Level | 29dB±3dB |
| Total Harmonic Distortion | ≤7%+3% |
| Charging Time | About 2 hours |
| Body Using Time | About 20 hours |
| Water & Dust Resistance | IP54 |
| Batteries | 1 Lithium Ion battery (included) |
| Package Dimensions | 10.8 x 10.8 x 6.9 cm |
| Item Weight | 4 Grams |
| Manufacturer | JINGHAO |
| Model Number | D590 |
| Country of Origin | China |
9. Warranty and Support
For warranty information and customer support, please refer to the documentation provided with your purchase or contact JINGHAO customer service directly. Keep your proof of purchase for any warranty claims.
Manufacturer: JINGHAO
Seller: JINGHAO MEDICAL (as per Amazon listing)
