9 Troubleshooting
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| Problem |
| Possible Cause |
| Remedy |
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| No sound. | 1. | AC adapter is not connected to receiver and/or power | 1. | Connect AC adapter to receiver and/or power outlet. |
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| outlet. |
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| 2. | Receiver is OFF. | 2. | Push POWER switch to switch receiver ON. |
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| 3. | Receiver is not connected to mixer or amplifier. | 3. | Connect receiver output to mixer or amplifier input. |
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| 4. | Microphone or instrument is not connected to body- | 4. | Connect microphone or instrument to audio input on |
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| pack transmitter. |
| bodypack. |
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| 5. | Transmitter is tuned to different frequency than re- | 5. | Tune transmitter and receiver to the same frequency. |
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| ceiver. |
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| 6. | Transmitter is "OFF" or transmitter MUTE switch at | 6. | Switch transmitter "ON" or set MUTE switch to ”ON” |
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| "MUTE". |
| position. |
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| 7. | Transmitter batteries are not inserted properly. | 7. | Insert batteries conforming to "+" and |
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| 8. | Transmitter batteries/battery pack dead. | 8. | Replace batteries/charge battery pack. |
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| 9. | Transmitter is too far away from receiver or squelch | 9. | Move closer to receiver or choose lower squelch |
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| threshold setting is too high. |
| threshold setting. |
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| 10. | Obstructions between transmitter and receiver. | 10. | Remove obstructions. |
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| 11. | Receiver is invisible from transmitter location. | 11. | Avoid spots where you cannot see receiver. |
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| 12. | Receiver too close to metal objects. | 12. | Remove offending objects or move receiver away. |
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| 13. | Transmitter and receiver Preset versions are not | 13. | Check Preset versions on transmitter and receiver. |
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| identical. |
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| Noise, crackling, unwanted signals. | 1. | Antenna location. | 1. | Relocate receiver or antennas. | |
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| 2. | Interference from other wireless systems, TV, radio, | 2. | Switch off interference sources or defective appli- |
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| CB radios, or defective electrical appliances or instal- |
| ances or tune transmitter and receiver to a different |
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| lations. |
| frequency; have electrical installation checked. |
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| Distortion. | 1. | GAIN control on transmitter is set too high or too low. | 1. | Decrease or increase GAIN setting just enough to |
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| stop the distortion. |
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| 2. | Interference from other wireless systems, TV, radio, | 2. | Switch off interference sources or defective appli- |
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| CB radios, or defective electrical appliances or instal- |
| ances or tune transmitter and receiver to a different |
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| lations. |
| frequency; have electrical installation checked. |
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Momentary loss of sound ("dropouts") at | • | Antenna location. | • | Relocate receiver or antennas. If dead spots persist, | ||
| some points within performance area. |
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| mark and avoid them. | |
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| Error Messages |
| Problem |
| Remedy |
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| ERR.>SYS< | • | Frequency settings cannot be changed. | 1. | Switch power to receiver OFF and back ON after |
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| about 10 seconds. |
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| 2. | If problem persists, contact your AKG Service Center. |
only |
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| ERR.>PRE< | • | Error in selected Preset. | 1. | Continue with previous Preset. | |
Receiver |
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| 2. | Select |
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| 3. | If problem occurs frequently, contact your AKG Serv- | |
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| ice Center. |
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| TXBand | 1. | Transmitter frequency band is not identical with re- | 1. | Use transmitter with the same frequency band as the |
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| ceiver frequency band. |
| receiver. |
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| 2. | RF output too high/low. | 2. | Use transmitter with lower/higher Rf output. |
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transmitter |
| ERR.>USR< | • | Last setting cannot be loaded. | 1. | Set frequency and squelch threshold again. |
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| 2. | If problem occurs frequently, contact your AKG Serv- | |
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| ice Center. |
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| ERR.>RF< | • | PLL error. (Receiver cannot lock on to selected fre- | 1. | Set different frequency. |
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| quency.) | 2. | If problem persists, contact your AKG Service Center. | |
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Receiver |
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| Err.>IR< | • | Infrared transmisison failed. | • | (5 cm). | |
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| Point transmitter infrared sensor directly at receiver | ||||
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| infrared emitter from a distance of approx. 2 inches |
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| 1. | Transmitter cannot identify battery as dry or | 1. | Remove battery and reinsert after approx. five sec- | |
only |
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| rechargeable type. |
| onds. |
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| 2. | Transmitter was switched on during charging. | 2. | Remove transmitter from charger, switch off, and | |
Transmitter |
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| restart charging (cf. CU 400 manual) |
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| >ChArGE< | • | Battery is not fully charged. | 1. | charged rechargeable battery. | |
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| Charge transmitter using CU 400 charger. | ||||
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| (rechargeable battery only) |
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| 2. | Replace transmitter battery with new dry or fully |
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44 | WMS 470 |
