qtxsound 103.124 User manual

USER MANUAL
KARAOKE STEREO
AMPLIFIERS
103.124 - 36W version
103.127 - 50W version

User Manual
103.124 & 103.127
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Karaoke Stereo Amplifiers
These stylish, low profile karaoke amplifiers offer a range of features to enhance your home
entertainment experience.
* Super-thin aluminum panel
* Large screen fluorescent and dynamic display
* Karaoke volume and echo can be adjusted independently
* Intelligent circuit protection function
* 4-way audio signal selection
* Balance, treble and bass adjustment of master sound channel
* Low leakage toroidal mains transformer
Introduction
In order to take advantage of the functions of your equipment, we suggest you read this
manual carefully before connection and operation. In addition, you will find we improve
design, manufacture process, operation mode and practicability etc to satisfy our users'
demands in all ways. Please keep this manual for future reference. We suggest you reserve
the original packaging.
Specifications
RMS power output (103.124)……………………….18W+18W rms (4Ω)
RMS power output (103.127)……………………….25W+25W rms (4Ω)
Frequency response…………………………….......20Hz – 20kHz
S/N ration……………………………........................≥76dB
Input sensitivity/impedance: Line input……………………………...≤250mV/47kΩ
MIC input……………………………...≤20mV/600Ω

User Manual
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1. Power Switch
2. MIC 1& Input
3. MIC 2& Input
4. MIC 1 Volume
5. MIC 2 Volume
6. MIC Echo
7. VFD Display
8. Audio Input selection of AC-3
9. Audio Input selection of TUNER
10. Audio Input selection of TAPE
11. Audio Input selection of VCD/CD
12. Master Treble
13. Master Bass
14. Master Balance
15. Master Volume

User Manual
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1. VCD/CD Audio input
2. TAPE Audio input
3. TUNER Audio input
4. AC-3 (5.1CH) Audio input
5. Audio output for right surround speaker (6-8 ohm)
6. Audio output for left surround speaker (6-8 ohm)
7. Audio output for centre speaker (6-8 ohm)
8. Audio output for right master speaker (6-8 ohm)
9. Audio output for left master speaker (6-8 ohm)
10. Power supply, 240Vac/50Hz

User Manual
103.124 & 103.127
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1. Left mark and white input port corresponds to left sound channel, right
mark and red input port corresponds to right sound channel.
2. Please make connections as shown in left Figure. When connecting,
Please refer to operation instructions of various parts.
3. Before all connections are completed, don't plug in power plug.
4. Before switching on this machine, please switch on program sources
required firstly.
5. Please complete all connections properly.

User Manual
103.124 & 103.127
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Troubleshooting Guideline
When you find the following problems during use, please refer to the instructions listed
below to troubleshoot the faults. If you cannot remove those faults, you should turn to
qualified electrical maintenance personnel or contact your supplier. Do not dismantle this
machine to repair it yourself there is a risk of electrical shock.
Fault
Possible cause
Troubleshooting
No sound outputs and
fluorescent screen does not
light
Power plug is not plugged in
or not Plugged In properly,
AC fuse is blown
Plug in power plug properly
and reliably Qualified
maintenance personnel
check and repair
No sound outputs, but
power is switched on
Volume knob switch is set to
lowest position Speaker line
and signal line are not
connected properly Input
port of signal source does
not correspond to machine
input No signal inputs
Adjust volume control
switch to a proper position
correctly connect speaker
line and Signal line
Select correct input port
check signal source or
signal line
One of speaker does not
work (no output)
Balance knob switch is not
adjusted properly, speaker
line is not connected
properly or occurs open
circuit single track of signal
source or signal line occurs
open circuit or short circuit
Adjust balance knob switch
connect and check speaker
line properly check signal
source or signal line
Buzz or low-frequency noise
Input signal line is not
connected properly or
grounded
Reconnect or check signal
line
Karaoke does not output
Microphone plug is not
plugged in MIC port
completely microphone
volume is adjusted to lowest
position
Plug in microphone properly
adjust microphone volume
to proper position
Karaoke does not have
echo effect
Digital echo is adjusted to
lowest position
Adjust digital echo to proper
position

User Manual
103.124 & 103.127
7
Key safety measures
Notice: Please read carefully the safety and operation instructions using this machine.
For the purpose of safety, Please comply with operation and use warnings provided here or
shown on this machine. These safety operation instructions should be kept for future
reference.
1. Power – This machine can use only the power indicated in the instructions or
marked on the device.
2. Electrical Shock – Do not use wet hands when plugging in, unplugging or operating
this device. Doing so may cause electrical shock. Do not place the device in, under
or near any wet or damp environments or items.
3. Environment – This device cannot bear a heavy load. Keep device out of direct
sunlight and other heat sources like radiators etc. Do not use or keep the device in
environments which are wet, damp, dusty, have high temperatures, have strong
light and have strong magnetic fields etc.
4. Power line protection – Prevent the power line from being stepped on or pressed by
heavy objects. Special attention should be paid when plugging in the power line,
outlets on the backboard and sockets on the wall. Never pull or drag the power line.
5. Never dismantle casing – Serious electric shock may occur if contact is made with
internal parts. Prevent metal pieces or liquid from getting inside the machines
openings.
6. When not in use for long periods of time, make sure the device is unplugged.