Self-solving of frequently asked questions
1
.
Switch on, amplifiers have no sound
A
.
The screen lights are not on, the power supply is out of power, charge to solve it
B
.
Screen lights on, whether the microphone is plugged in the wrong position.
Guarantee
Remarks:
1. This guarantee card should be kept by the user, no replacement if lost.
2. Most new products carry a two-year manufacturer’s warranty from the date of purchase.
Further details, pls read http://www.retevis.com/after-sale/
3. The user can get warranty and after-sales service as below:
• Contact the seller where you buy.
• Products Repaired by Our Local Repair Center.
4. For warranty service, you will need to provide a receipt proof of purchase from the
actual seller for verification.
Exclusions from Warranty Coverage:
1. To any product damaged by accident.
2. In the event of misuse or abuse of the product or as a result of unauthorized alterations
or repairs.
3. If the serial number has been altered, defaced, or removed.
conducted after using up, because frequent charging will accelerate the aging of the
battery chip, and the battery should be recharged every two months when it is not
used for a long time.
4. Because the horn magnetic effect is strong, do not put the machine and the bank card
and other magnetic things together, lest cause the loss of magnetism and cause unne-
cessary trouble
.
5. All the accessories of this product are designed according to the requirements of the
machine. If we need to replace the accessories, we can use the original parts to
achieve the best working condition.
•
There is a risk of explosion if the battery is not replaced properly, and only the same
type or equivalent type of battery can be used to replace the battery.
•
The operating environment of the machine is -10
℃
-45
℃
, and the battery (battery
pack or combination battery) shall not be exposed to such conditions as sunlight, fire
or similar overheating.
•
Batteries are polluting, please dispose of end-of-life batteries and machines properly
2
.
The loudspeaker has a distinct howl
A
.
Make sure you wear a microphone and point the mark at the corner of your mouth.
B
.
When the space becomes small, you should lower the voice appropriately in order
to reduce the howling in reverberation.
8
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