Prunus J-777 - User Manual

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PRUNUS J-777 Radio User Manual

◆If you will not use the radio for a long time, please take out the batteries.

◆Please do not use this product near water or put it into liquid.

◆Please do not use this product near the environment over 40 degrees Celsius.

◆Each index of the radio is adjusted well, so please do not adjust the components in

the radio.

Thank you for purchasing the PRUNUS J-777 radio. In order to get the best from the

radio please read this manual carefully before using it and take special notice of the

section on precautions.

①Power OFF/ON(FM/AM)

②Tuning knob

③Volume knob

④Earphone jack

⑤Antenna

⑥Power indicator

⑦Frequency display

⑧Speaker

⑨Battery door

The J-777 radio requires 2 AAA batteries (not included) which can be replaced.

Battery installation method:

1. Push the <⑨Battery door> to open the battery compartment.

2. Place the batteries according to its polarity.

3. Close the battery door.

4. Change the battery in time if the sound is distorted or the volume is faint.

Note:

◆When removing the depleted battery, if the battery leaks, remove it and thoroughly

wipe the liquid in the unit.

◆Waste batteries should be placed in designated recycling sites.

Precautions

Functional Components

Power Supply

Radio Reception

1. Push <①Power OFF/ON(FM/AM)> to turn on the radio. You can push to FM or AM

position according to your preferences.

2. Turn the <②Tuning knob> to adjust the position of red pointer inside <⑦Frequency

display> to related frequency, to select radio station.

3. Turn the <③Volume knob> to adjust the volume.

4. When ﬁnished listening, push <①Power OFF/ON(FM/AM)> to turn oﬀ the radio.

Note:

◆When tuning to the FM stations, extend the <⑤Antenna> and adjust the position of

the aerial for the best reception; When receiving AM, rotate the radio to get the best

reception.

◆In order to get better reception, when using the radio indoors, please approach it to

the window and do your best to keep it away from the electronic devices (such as com-

puters, TVs, refrigerators, mobile phones, etc).

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Need help?

Do you have a question about the Prunus J-777 and is the answer not in the manual?

Summary

Product Precautions and Safety

Battery Handling for Storage

Remove batteries from the radio if it will not be used for a long time.

Liquid and Environment Safety

Avoid using the radio near water or in environments over 40 degrees Celsius.

Internal Component Integrity

Do not adjust internal radio components as they are pre-adjusted.

PRUNUS J-777 Functional Components Overview

Power and Band Selection

The power switch also selects between FM and AM bands.

Tuning and Volume Controls

Knobs for adjusting radio frequency and audio output level.

Audio Output and Connection Ports

Includes a speaker and an earphone jack for private listening.

Signal Reception Components

Features an antenna for signal reception and a frequency display.

Battery Compartment Access

The battery door provides access for battery replacement.

Power Supply and Battery Installation

Battery Requirements

The radio requires 2 AAA batteries, which are not included.

Battery Replacement Procedure

Instructions for opening the compartment, inserting batteries, and closing.

Battery Maintenance Notes

Handle leaking batteries carefully and dispose of waste batteries responsibly.

Radio Operation and Reception

Basic Operation Steps

Steps to turn on, tune, adjust volume, and turn off the radio.

Optimizing Reception

Tips for extending the antenna, positioning, and avoiding electronic interference.

Advanced Features and Support

Headphone Usage

Connect headphones to the earphone jack to mute the speaker.

Human Body Induction Effect

Explanation of how holding the radio can affect reception quality.

After-Sale Service Contact

Information on contacting customer support via QR code or email for assistance.

The PRUNUS J-777 is a compact and portable FM/AM 2-band radio designed for ease of use and reliable reception. This user manual provides comprehensive instructions for its operation, maintenance, and troubleshooting, ensuring users can get the best experience from their device.

Function Description

The primary function of the PRUNUS J-777 is to receive and play FM and AM radio broadcasts. It features a straightforward interface with essential controls for power, tuning, and volume. The radio is designed for personal listening, offering both an integrated speaker and a headphone jack for private audio. Its compact size and battery-powered operation make it suitable for use in various indoor and outdoor environments.

Important Technical Specifications

Model: J-777
Radio Bands: FM and AM
FM Frequency Range: 88-108 MHz
AM Frequency Range: 520-1710 kHz
Power Source: 2 x AAA batteries (not included)
Audio Output: Built-in speaker and 3.5mm earphone jack
Controls:
- Power OFF/ON (FM/AM selector)
- Tuning knob
- Volume knob
Indicators: Power indicator, Frequency display
Antenna: Extendable antenna for FM, internal antenna for AM
Dimensions: Compact and portable design (exact dimensions not specified in the manual, but implied by the visual representation)
Certifications: CE, FC, RoHS (indicating compliance with European safety, electromagnetic compatibility, and hazardous substance restrictions)

Usage Features

The PRUNUS J-777 is designed for simple and intuitive operation:

Power On/Off and Band Selection: The radio is turned on by pushing the <①Power OFF/ON(FM/AM)> switch to either the FM or AM position, depending on the desired band. To turn off the radio, the switch is returned to the OFF position.
Tuning: Radio stations are selected using the <②Tuning knob>. Users rotate this knob to align the red pointer within the <⑦Frequency display> to the desired frequency.
Volume Control: The <③Volume knob> allows users to adjust the audio output level from the speaker or headphones.
Headphone Listening: For private listening, headphones can be plugged into the <④Earphone jack>. When headphones are connected, the radio automatically switches to headphone mode, muting the built-in speaker. Upon unplugging the headphones, the radio reverts to speaker mode. Users are advised to adjust the volume accordingly when switching between modes.
Antenna for Reception:
- For FM reception, the <⑤Antenna> should be extended and adjusted for optimal signal strength.
- For AM reception, rotating the entire radio can help improve signal quality.
Indoor Reception Tips: When using the radio indoors, it is recommended to place it near a window and keep it away from electronic devices such as computers, TVs, refrigerators, and mobile phones, as these can interfere with reception.
Human Body Induction: The manual notes a common phenomenon where holding the radio can improve weak reception, a characteristic referred to as "Human Body Induction."

Maintenance Features

Proper maintenance ensures the longevity and optimal performance of the PRUNUS J-777:

Battery Installation and Replacement:
1. Open the <⑨Battery door> by pushing it.
2. Insert two AAA batteries, ensuring correct polarity.
3. Close the battery door.
4. Batteries should be replaced promptly if the sound becomes distorted or the volume is faint, indicating low power.
Battery Precautions:
- If the radio will not be used for an extended period, the batteries should be removed to prevent leakage and potential damage.
- In case of battery leakage, the depleted battery should be removed, and any liquid in the unit should be thoroughly wiped away.
- Waste batteries should be disposed of at designated recycling sites.
General Precautions:
- Avoid using the product near water or immersing it in liquid.
- Do not use the product in environments where the temperature exceeds 40 degrees Celsius.
- The radio's internal components are factory-adjusted; users should not attempt to modify or adjust them.
Cleaning: While not explicitly detailed, the general advice for electronic devices suggests cleaning the exterior with a soft, dry cloth. Avoid using harsh chemicals or abrasive materials.

After-Sale Service

For any issues or failures with the radio, customers can access after-sale service by scanning a provided QR code to "Ask a question" on Amazon or by sending an email to prunus-technik@hotmail.com. This ensures support and assistance for users experiencing problems with their device.