User Manual
1
ATOMIC
Quick
Set-Up Guide
ADVW721 (RF8338-51)
900MHz
PLL Headphones
Manual Tuning
2
Congratulations on the purchase of ADVW721 (RF8338-51) (900MHz) Stereo RF
Wireless Headphones to enjoy the revolutionary technology of Phase Lock Loop (PLL)!
Please check the supplied component against the following list:
1 x Transmitter
1 x Headphones
1 x Power Supply (AC/DC 12V 200mA Adaptor for Transmitter)
1 x 3.5mm Stereo Audio Cord
1 x 3.5mm Y-connection Cord
1 x Charging Cord
FUNCTION KEYS
HEADPHONES
1
2
3
4
5
6
7
8
9
(1) Headbelt
(2) Ear Cushion
(3) Power ON/OFF Switch
(4) Channel Tuning Knob
(5) Volume Control Knob
(6) Power LED Indicator
(7) Charging Socket
(8) Battery Compartment
(9) Battery cover
3
TRANSMITTER:
Transmitter Front Side:
(10) Charging LED Indicator
(11) Power LED Indicator
Transmitter Rear Side:
(12) Channel CH1/CH2/CH3 Switch
(13) Audio IN Socket
(14) Charging Socket
(15) DC IN Socket
ACCESSORIES:
(16) 3.5mm Y-connection Cord
(17) 3.5mm Stereo Audio Cord
(18) AC/DC Adaptor
(19) Charging Cord
10
11
13
15
14
12
16
17
18
19
4
INSTALLATION
Please follow this quick set-up guide to ensure trouble free installation of your
headphones.
Step 1:
Connect the 3.5mm Stereo Audio Cord (17) to the audio output socket (i.e. PHONE/
HEADPHONE 3.5mm socket) of your audio source, e.g. TV, HiFi, CD, DVD player etc.
*** If your audio source has 2 RCA output sockets (red and white in colour), use the
90mm Y-connection Cord (16) for connection, if necessary.
Step 2:
Connect the other end of the 3.5mm Stereo Audio Cord (17) to the Audio IN Socket (13)
at the rear side of the transmitter.
Step 3:
Connect one end of the AC/DC Adaptor (18) to the DC IN Socket (15) at the rear side of
the transmitter, and the other end to the main electric wall outlet.
Step 4:
The transmitter will be automatically ON when there is audio signal from the audio
source (please make sure that the transmitter is powered on by the AC/DC adaptor in
Step 3). Then the Power LED Indicator (11) will glow Green to confirm that the
transmitter is ready for operation. Place the transmitter on a dry, cool place preferably
above head level.
*** The transmitter has auto-cut-off function. When there is no audio signal for over
70+/-10 seconds, the power of the transmitter will be automatically cut off.
Step 5:
Open the Battery Cover (9). Insert 2 pcs AAA size batteries into the Battery
Compartment (8) at the Left hand side of the headphones observing the correct polarity.
Then close the Battery Cover (9), and switch the headphones ON (3).
Step 6:
Switch on your music device (TV. HiFi, CD, DVD etc.) and start your media playing.
Step 7:
Adjust the channel Tuning Knob (4) Select the Correct channel and The good quality
sound. Adjust the Volume Control Knob (5) to a comfortable sound level.
5
CHANNEL SELECTION
There are 3 channels altogether for this PLL Headphone. At the rear side of the
transmitter, there is a Channel CH1/CH2/CH3 Switch (12).
Frequency Channel
912.40MHz CH1
913.00MHz CH2
913.60MHz CH3
The 3 different channels are auto-locked by the latest PLL technology, enable you to
enjoy the great sound quality in high stability.
CHARGING THE HEADPHONES
Battery type: Rechargeable batteries AAA
No. of cells: 2pcs
Rated capacity: 300 mAH / 9 hrs
Rated DC output voltage (V): 2.4V
Rated DC output current (A): 60mA
Step 1:
Insert 2 pcs AAA size rechargeable batteries into the Battery Compartment (8) at the Left
hand side of the headphones.
Step 2:
Switch OFF (3) the headphones.
Step 3:
Connect the transmitter to a conveniently located electric wall outlet with the supplied
AC/DC Adaptor (18).
Step 4:
Insert one end of the Charging Cord (19) to the Charging Socket (14) at the rear side of
transmitter and the other end to the Charging Socket (7) of headphones.
The batteries should be charged for a full 12 hours before use. During charging process,
the Charging LED Indicator (10) will glow RED showing the headphone is being charged.
*** Regular (non-rechargeable type) batteries can also be used to operate this
headphone. However, you must never attempt to charge non-rechargeable batteries in
this appliance as this could prove dangerous.
Step 5:
When the batteries have been charged, remember to remove the Charging Cord from the
headphones.
6
*** Charging procedure should never exceed 48 hours.
Caution! To avoid risk of fire or injury, do not attempt to recharge non-rechargeable
batteries.
Replace only with the same or equivalent type recommended by the manufacturer.
Please dispose of old, defective batteries in an environmentally friendly manner in
accordance with the relevant legislation.
TROUBLE SHOOTING GUIDE
If you encounter any trouble in setting up the Headphones, please check the following
points:
(1) Distorted sound quality or unclear sound:
~ Check if the sound of your audio source is distorted and whether the volume control
is tuned to the suitable level.
~ Check if the batteries in the headphones have insufficient power. Replace fresh ones if
necessary.
~ Check if you have selected the best channel, Turn the Channel Tuning Knob (4)
again to check.
~ Check if the distance between the headphones and transmitter are within the effective
range. (The effective range of the device is approx. 100M in open area.) Place the
headphones closer to the transmitter.
(2) No Sound from the headphones:
~ Make sure that your audio equipment, the transmitter and headphones are properly
connected, powered and switched ON.
~ Check if the batteries are inserted properly into the battery compartment.
~ Check if the transmitter is powered on with the AC/DC adaptor: the Power LED
Indicator (11) will glow GREEN showing the transmitter is powered (only when there
is audio signal from the audio source).
~ Check if all the connection cords are properly connected.
(3) Mono Sound:
~ Check if the audio source is mono only, use stereo audio source.
(4) Interference:
~ At the rear side of the transmitter, there is a Channel CH1/CH2/CH3 Switch (12),
select a different channel and adjust the Channel Tuning Knob (4) Select the Correct
channel and The good quality sound.
(5) Power auto-cut-off:
~ The transmitter has auto-cut-off function. When there is no audio signal for a
prolonged period, the power of the transmitter will be automatically cut off. You just
need to switch on the audio sources again.
7
The ventilation should not be impeded by covering the ventilation openings with items,
such as newspaper, tablecloths, curtains, etc.
No naked flame sources, such as lighted candles, should be placed on the apparatus.
If you still have problem after checking the above points, please contact your customer
service. Do not try to loosen the screws of the products to fix the problem.
All the above are subject to our final change without further notice.
Copyright by Atom Industrial Ltd.2003
8
SPECIFICATION
Model ADVW721 (RF8338-51) (900MHz)
Description Radio Frequency (UHF)
Wireless Headphones System
(Power Auto Cut Off/ Phase Lock Loop/
Rechargeable function
Transmitter
No. of Channels 3
Carrier Frequency Channel 1: 912.40MHz
Channel 2: 913.00MHz
Channel 3: 913.60MHz
Effective Range 100 meters
Power Supply AC/DC Adaptor
Headphones
Frequency Responses 20 - 20,000 Hz
Signal to Noise Ratio 50dB
Distortion <1%
Channel Separation 30dB
Power Supply 2 x 1.2V AAA size rechargeable batteries OR
2 x 1.5V AAA size normal batteries (Optional)
System Included: 1 x Transmitter
1 x Headphones
1 x AC120V DC 12V 200mA (UL) adaptor for
transmitter
1 x 3.5mm Stereo Audio Cord
1 x 3.5mm Y-connection Cord
1 x Charging Cord
Operation is subject to the following two conditions: (1) this device may not cause
interference, and (2) this device must accept any interference, including interference that
may cause undesired operation of the device.
Warning: Changes or modifications to this unit not expressly approved by the party
responsible for compliance could void the user’s authority to operate the equipment.