TJ Media TA-550, Руководство пользователя

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Grounding precautions Safety
Warning
Make sure to connect the ground wire to the ground outlet.
The unit not grounded or improperly grounded can cause fire or electric shock.
Also, the possibility of getting electric shocks from other devices(monitor, karaoke machine, microphone)
connected to the amp.
What is grounding?
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 needs to be
grounded and class 3 grounding construction must be performed to prevent fires or electric shocks.
Grounding is the most basic safety device in any electronic devices, and insufficient grounding device can cause
degrading performance of the unit, damages to the unit or malfunctioning. Thus proper grounding device 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, 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 materia.(equipment grounding)
- To prevent electric shocks by dispersing high voltage currents from high voltage clash accidents that can
damage human.(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
equipments 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.
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