TJ TA-E41, Руководство пользователя, Страница: 9 / 36

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Warning
Make sure to connect the ground wire to the ground terminal.
The unit not grounded or improperly grounded can cause fire or electric shock.
Also, there is the possibility of getting electric shocks from other devices(monitor,
karaoke machine, microphone) connected to the amp.
What is grounding?
This product is used in karaoke bar or karaoke room, and operates with other devices such as
karaoke machine, speaker, LDP, video channel separator, satellite receiver and microphone in
complex connections, therefore needs to be grounded and class 3 grounding construction must be
performed to prevent fires or electric shocks.
Grounding is the most basic safety measure in any electronic devices, and insufficient grounding
device can cause degrading performance of the unit, damages to the unit or malfunctioning.
Thus proper grounding measure must be installed in order to prevent injuries, damages to the unit
and malfunctioning.
Improper grounding installation can prevent circuit breaker from working properly in cases of over
load or other mechanical problems of the unit, making damages to the unit or fire unpreventable.
Also, residual current device may not function properly, be unable to prevent injuries to human from
electric shock, and it is especially dangerous in humid, raining weather.
Rapid voltage fluctuations(from few hundred thousand to million V) from thunderbolts can cause fire,
damage to the unit, or even injuries.
Reasons for grounding construction
- To prevent electric shocks from residual current due to blazed or damaged insulating material.
(equipment grounding)
- To prevent electric shocks from high voltage clash accidents that can damage human by
dispersing high voltage currents to the ground..(system grounding)
- To prevent thunderbolt damages.(shielding)
- To make relays to work fast and accurately in case of ground fault accidents in power cables,
high voltage cables, bus lines.(grounding)
- Reduce dielectric strength and suppress voltage to ground in abnormal high voltage situations
from equipment or relays.
If not grounded
If there is an electric leakage in electronics equipment, metal casing is charged electricity and can
injure human upon touching.
This unit is used in karaoke bar or karaoke room, and operates with other devices such as
karaoke machine, speaker, LDP, video channel separator, satellite receiver and microphone in
complex connections, therefore, if not grounded properly or no ground constructions were done,
there is a high chance of electric shock damage through lips touching microphone.
If grounded
If metal casing is grounded, most of the electric leakage goes to the ground through ground wire,
preventing electric shocks.
Grounding will also reduce malfunctioning of the unit and noises, allowing the unit to perform as
designed.
Grounding precautions