VIETA VMHW800BK User Manual page 9

Symptom 1
No sound comes when the Power is on.
May caused by:
1. No input sound source
2. Volume knob in the lowest position
3. Voice switch o
4. USB/SD card not plugged
Symptom 2
Distortion of sound.
May caused by:
1. Volume is too loud.
2. Audio file error.
Symptom 3
No sound comes from the microphone.
May caused by:
1. Microphone socket may not be
plugged properly
2. Microphone switch may not be on
3. Microphone volume is on lowest mode
Symptom 4
Unable to charge or the battery works only for short duration.
May caused by:
1. Connect with power cord to charge
2. Battery not fully charged
3. Battery life may have ended
Symptom 5
No sound comes after inserting USB/SD card.
May caused by:
1. Incorrect file format
2. USB/SD card may not be plugged
in properly
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Solution:
1. Input AUX signal
2. Adjust volume
3. Turn on voice switch
4. Plug USB/SD card, play MP3.
Solution:
1. Turn the volume down.
2. Check and change the audio file.
Solution:
1. Ensure the microphone is
correctly plugged into the socket
2. Turn on the microphone
3. Adjust the microphone volume
as per users wish
Solution:
1. Check if power cord connected properly
2. Extend charging time; normally it takes
6-8 hours to fully charge
3. Replace old batteries with the same
specification as the old batteries
Solution:
1. File format should be MP3
2. Plug USB/SD card correctly