1, equipment shell charged phenomenon check sequence

Equipment shell charged - power supply line is damaged - line phase is correct - equipment grounding is correct - the use of voltage is correct.

2, the sound system volume

The device volume is insufficient, the amplifier and speaker line level settings are correct - speaker wire connection is solid - phase power amplifier and speakers are the same, the attenuation of the appropriateness of the equalizer.

Resonance and feedback 3, sound field.

Resonance sound feedback - check the room response whether peak - room structure and decoration is reasonable, the crossover point and low gain is reasonable, the reverberation time is too long.

4, the interference noise

Audio system with noise and light interference - sound and lighting power is separated and light power and control lines are from the audio signal line too close - silicon box is too close from the audio equipment.

Speaker whether shielded transmission noise signal is reasonable, all signal lines properly grounded signal is correct - power phase all audio equipment is consistent.

5, the light is out of control

Lights out - controller program is correct - address code lamp is correct - connection control line is correct - shielding control line is bad or interference - lamp spacing adjustment is appropriate, the light electricity switch contact is good.

6, computer light bulbs are often damaged (750 hours)

A light bulb is easy to bad installation is reliable if contaminated dust and moisture - bulb heat is good - voltage is normal, if the power switch frequent operation.

7, the video image is not normal

Video image is not normal and program modes is correct - equipment enclosures are charged - signal shielding are high level interference - projector is normal - projection lamp performance is inferior.

8, a wireless microphone sound instability

The sound is not stable, whether the system has the high frequency interference source and antenna connection is correct - receiver tuning is correct and microphone and microphone quantity is excessive battery power is insufficient