Lectrosonics T4 User Manual download pdf (Page 12)

IFBT4

LECTROSONICS, INC.

Troubleshooting

NOTE: Always ensure that the COMPAT (compatibility) setting is the same on both transmitter and receiver. A variety of

different symptoms will occur if the settings do not match.

With the IFBR1a receiver no sound will be heard unless the transmitter is set to the IFB mode. When used with

receivers other than the IFBR1a, a variety of symptoms will occur when the COMPAT settings do not match, ranging

from no sound, to level inconsistencies, to distortion of various degrees.

See the section entitled Front Panel Controls and Functions for details on the available compatibility modes and how to

select them.

Symptom: Possible Cause:

Display Dead 1) External power supply disconnected or inadequate.

2) The External DC power input is protected by an auto-reset

polyfuse. Disconnect power and wait about 1 minute for the

fuse to reset.

No Transmitter Modulation 1) Audio input gain setting turned all the way down.

2) Sound source off or malfunctioning.

3) Input cable damaged or mis-wired.

No Received Signal 1) Transmitter not turned on.

2) Receiver antenna missing or improperly positioned.

(The IFBR1/IFBR1a headset cable is the antenna.)

3) Transmitter and receiver not on same frequency.

Check on transmitter and receiver.

4) Operating range is too great.

5) Transmitter antenna not connected.

6) Transmitter switch in the TUNE position. Switch to XMIT mode.

No Sound (or Low Sound Level), and Receiver is powered on.

1) Receiver output level set too low.

2) Receiver earphone cable is defective or mis-wired.

3) Sound system or transmitter input is turned down.

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

meter on transmitter as it is being used. (Refer to Installation &

Operation section for details on gain adjustment.)

2) Receiver output may be mismatched with the headset or earphone.

Adjust output level on receiver to the correct level for the headset

or earphone.

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

and/or use a larger windscreen.

Hiss, Noise, or Audible Dropouts 1) Transmitter gain (audio level) far too low.

2) Receiver antenna missing or obstructed.

(The IFBR1/IFBR1a headset cable is the antenna.)

3) Transmitter antenna missing or mismatched.

Check that the correct antenna is being used.

4) Operating range too great.

5) Defective remote antenna or cable.

Antenna Icon (in Main Window) or Hex Code (in Frequency Window ) Blinking

1) PLL is unlocked. Retune transmitter. Factory service may be

required if problem persists.

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Lectrosonics T4 User Manual Page 12

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