Lectrosonics Inc UM400E 사용자 설명서

15

Before going through the following chart, be sure that you have a good battery in the transmitter. It is important that 

you follow these steps in the sequence listed.

Symptom 

 

 

 

 

Possible Cause

TRANSMITTER BATTERY LED OFF 

1)   Battery is inserted backwards. 

   

2)  Battery is dead.

NO TRANSMITTER MODULATION LEDs 

1)  Gain control turned all the way down. 

   

2)  Battery is in backwards. Check power LED. 

   

3)  Mic capsule is damaged or malfunctioning. 

   

4)  Mic cable damaged or mis-wired.

RECEIVER RF LAMP OFF 

1)  Transmitter not turned on. 

   

2)  Transmitter battery is dead. 

   

3)  Receiver antenna missing or improperly positioned. 

   

4)  Transmitter and receiver not on same frequency. Check  

   

 

switches/display on transmitter and receiver. 

   

5)  Operating range is too great. 

   

6)  Transmitter antenna not connected

1)  Receiver output level set too low.

2)  Receiver output is disconnected; cable is defective 

MODULATION 

 

or mis-wired. 

   

3)  Transmitter is not set to same frequency as receiver. Check that  

   

 

frequency select switches on receiver and transmitter match. 

   

4)  Sound system or recorder input is turned down.

DISTORTED SOUND 

1)  Transmitter gain (audio level) is far too high. Check mod level  

   

 

lamps on transmitter and receiver as it is being used.  

   

 

(Refer to Operating Instructions - Adjusting Gain) 

   

2)  Receiver output may be mismatched with the sound system or  

   

 

recorder input. Adjust output level on receiver to the correct  

   

 

level for the recorder, mixer or sound system. 

   

3)  Excessive wind noise or breath “pops.. Reposition microphone  

   

 

and/or use a larger windscreen.

HISS AND NOISE -- AUDIBLE DROPOUTS 

1)  Transmitter gain (audio level) far too low. 

   

2)  Receiver antenna missing or obstructed. 

   

3)  Transmitter antenna missing or folded against housing. 

   

4)  Operating range too great.

EXCESSIVE FEEDBACK 

1)  Transmitter gain (audio level) too high. Check gain adjustment  

   

 

and/or reduce receiver output level. 

   

2)  Transmitter too close to speaker system. 

   

3)  Mic is too far from user’s mouth.

Troubleshooting