WMS 400 V 1.10
1. Charge transmitter using CU 400 charger.
2. Replace transmitter battery with new dry or fully charged rechargeable battery.

6 Troubleshooting

Problem

No sound.

Noise, crackling, unwanted signals.

Distortion.

Momentary loss of sound ("dropouts") at some points within performance area.

Error Messages

 

ERR.>SYS<

only

 

Receiver

ERR.>PRE<

 

 

TXBand

 

 

transmitter

ERR.>USR<

 

and

ERR.>RF<

Receiver

Err.>IR<

 

 

 

only

>-h<

Transmitter

>ChArGE<

 

 

(rechargeable battery only)

 

 

32

 

Possible Cause

 

Remedy

1.

AC adapter is not connected to receiver

1.

Connect AC adapter to receiver and/or

 

and/or power outlet.

 

power outlet.

2.

Receiver is OFF.

2.

Push POWER switch to switch receiver ON.

3.

Receiver is not connected to mixer or

3.

Connect receiver output to mixer or ampli-

 

amplifier.

 

fier input.

4.

Microphone or instrument is not connected

4.

Connect microphone or instrument to

 

to bodypack transmitter.

 

audio input on bodypack.

5.

Transmitter is tuned to different frequency

5.

Tune transmitter and receiver to the same

 

than receiver.

 

frequency.

6.

Transmitter is "OFF" or transmitter MUTE

6.

Switch transmitter "ON" or set MUTE

 

switch at "MUTE".

 

switch to ”ON” position.

7.

Transmitter batteries are not inserted

7.

Insert batteries conforming to "+" and "-"

 

properly.

 

marks.

8.

Transmitter batteries/battery pack dead.

8.

Replace batteries/charge battery pack.

9.

Transmitter is too far away from receiver or

9.

Move closer to receiver or choose lower

 

squelch threshold setting is too high.

 

squelch threshold setting.

10.Obstructions between transmitter and

10.Remove obstructions.

 

receiver.

 

 

11.Receiver is invisible from transmitter location.

11.Avoid spots where you cannot see receiver.

12.Receiver too close to metal objects.

12.Remove offending objects or move receiv-

 

 

 

er away.

13.Transmitter and receiver Preset versions

13.Check Preset versions on transmitter and

 

are not identical.

 

receiver.

1.

Antenna location.

1.

Relocate receiver or antennas.

2.

Interference from other wireless systems,

2.

Switch off interference sources or defective

 

TV, radio, CB radios, or defective electrical

 

appliances or tune transmitter and receiver

 

appliances or installations.

 

to a different frequency; have electrical

 

 

 

installation checked.

1.

GAIN control on transmitter is set too high

1.

Decrease or increase GAIN setting just

 

or too low.

 

enough to stop the distortion.

2.

Interference from other wireless systems,

2.

Switch off interference sources or defective

 

TV, radio, CB radios, or defective electrical

 

appliances or tune transmitter and receiver

 

appliances or installations.

 

to a different frequency; have electrical

 

 

 

installation checked.

Antenna location.

Relocate receiver or antennas. If dead

 

 

 

spots persist, mark and avoid them.

 

Problem

 

Remedy

Frequency settings cannot be changed.

1.

Switch power to receiver OFF and back

 

 

 

ON after about 10 seconds.

 

 

2.

If problem persists, contact your AKG

 

 

 

Service Center.

Error in selected Preset.

1.

Continue with previous Preset.

 

 

2.

Select error-free Preset.

 

 

3.

If problem occurs frequently, contact your

 

 

 

AKG Service Center.

1.

Transmitter frequency band is not identical

1.

Use transmitter with the same frequency

 

with receiver frequency band.

 

band as the receiver.

2.

RF output too high/low.

2.

Use transmitter with lower/higher Rf out-

 

 

 

put.

Last setting cannot be loaded.

1.

Set frequency and squelch threshold again.

 

 

2.

If problem occurs frequently, contact your

 

 

 

AKG Service Center.

PLL error. (Receiver cannot lock on to

1.

Set different frequency.

 

selected frequency.)

2.

If problem persists, contact your AKG

 

 

 

Service Center.

Infrared transmisison failed.

Point transmitter infrared sensor directly at

 

 

 

receiver infrared emitter from a distance of

 

 

 

approx. 2 inches (5 cm).

1.

Transmitter cannot identify battery as dry

1.

Remove battery and reinsert after approx.

 

or rechargeable type.

 

five seconds.

2.

Transmitter was switched on during charg-

2.

Remove transmitter from charger, switch off,

 

ing.

 

and restart charging (cf. CU 400 manual)

Battery is not fully charged.

 

 

 

 

 

 

Page 38
Image 38
AKG Acoustics WMS 400 user manual Troubleshooting, Error Messages, Only, Possible Cause Remedy, Problem Remedy

WMS 400 specifications

AKG Acoustics has long been recognized as a premier brand in the professional audio industry, particularly in the realm of wireless microphone systems. Among its celebrated offerings, the WMS 4000, WMS 400, and WMS 40 series stand out for their advanced technology and robust performance, catering to a range of applications from live performances to studio recordings.

Starting with the WMS 4000, this system is engineered for versatility and reliability. It features a sophisticated transmission diversity system that minimizes dropouts and ensures clear audio quality. The WMS 4000 offers an extensive frequency range, accommodating diverse environments and frequencies. A standout feature is its digital pilot tone, which automatically mutes the transmitter when it is switched off, effectively preventing unwanted noise during transitions. With a range of up to 300 meters, the WMS 4000 is ideal for large venues, allowing performers ample space to move without compromising sound quality.

Next, the WMS 400 series maintains the high standards set by its predecessor while providing a more accessible option for mid-level performers. It combines ease of use with quality audio performance, boasting a user-friendly interface that simplifies setup and operation. The WMS 400 employs an efficient frequency management system, which automatically scans the environment to select the best frequencies available, ensuring optimal performance with minimal interference. The system also features a rugged metal chassis, enhancing durability for live applications.

The WMS 40 series serves as an entry-level solution, perfect for beginners and small venues. It is lightweight and features a straightforward design, making it easy to operate for users without extensive technical knowledge. One of its most notable characteristics is its plug-and-play functionality, allowing for quick setup without complicated configurations. The WMS 40 series also offers excellent sound quality through its crystal-clear audio transmission and robust reception, making it a popular choice for schools, theaters, and small events.

All of these systems benefit from AKG's heritage in sound engineering, incorporating advanced audio processing technologies that ensure superior sound fidelity. They also come with a variety of microphone options, including handheld, lavalier, and headworn microphones, providing flexibility to meet different performance needs. Whether for a professional stage or an intimate setting, the AKG WMS series delivers outstanding performance, reliability, and user-friendly features that cater to a wide range of audio applications.