Lectrosonics Inc SMWBB2 ユーザーズマニュアル

24

Troubleshooting

Symptom: 

    Possible 

Cause:

1.  Batteries are inserted incorrectly.

when Power Switch “ON” 

2.  Batteries are low or dead.

1.  Gain control turned all the way down.

when Signal Should be Present 

2.  Batteries are inserted incorrectly. Check power LED.

   

3.  Mic capsule is damaged or malfunctioning.

   

4.  Mic cable damaged or miswired.

   

5.  Instrument Cable damaged or not plugged in.

   

6.  Musical instrument output level set too low.

Receiver Indicates RF But No Audio 

1.  Audio source or cable connected to transmitter is defective. Try 

   

  using an alternate source or cable.

   

2.  Make sure the compatibility mode is the same on transmitter and 

  

  receiver.

   

3.  Ensure musical instrument volume control is not set to minimum.

   

4.  Check for correct pilot tone indication on the receiver. See item on 

   

  page 16 entitled 

Receiver RF Indicator Off 

1.  Ensure that the transmitter and receiver are set to the same 

   

  frequency, and that the hex code matches.

   

2.  Transmitter not turned on, or battery is dead.

   

3.  Receiver antenna missing or improperly positioned.

   

4.  Operating distance is too great.

   

5.  Transmitter may be set to the Standby Mode. See page 8.

1.  Receiver output level set too low.

Indicates Proper Audio Modulation 

2.  Receiver output is disconnected; cable is defective or miswired.

   

3.  Sound system or recorder input is turned down.

Distorted Sound   

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

   

  LEDs on transmitter and receiver while distortion is being heard.

   

2.  Receiver output level 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.  Transmitter and receiver may not be set to the same compatibility 

   

  mode. Some mis-matched combinations will pass audio.

   

4.  RF interference. Reset both transmitter and receiver to a clear  

   

  channel. Use scanning function on receiver if available.

1.  Reposition microphone, or use a larger windscreen, or both.

   

2.  Omni-directional mics produce less wind noise and breath pops 

   

  than directional types.

Hiss and Noise -- Audible Dropouts 

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

   

2.  Receiver antenna missing or obstructed.

   

3.  Operating distance too great.

   

4.  RF interference. Reset both transmitter and receiver to a  

   

  clear channel. Use scanning function on receiver if available.

   

5.  Musical instrument output set too low.

   

6.  Microphone capsule picking up RF noise. See item on page 21 

  

  entitled 

Microphone RF Bypassing.

Excessive Feedback (With Microphone) 

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

   

  and/or reduce receiver output level.

   

2.  Microphone too close to speaker system.

   

3.  Microphone is too far from user’s mouth.

It is important that you follow these steps in the sequence listed.