6 Troubleshooting
Problem |
| Possible Cause |
| Remedy |
| 1. | AC adapter is not connected to transmitter | 1. | Connect AC adapter to transmitter and/or |
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| and/or AC outlet. |
| AC outlet. |
| 2. | Transmitter is OFF or not connected to | 2. | Switch transmitter on or connect to audio |
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| audio source. |
| source. |
| 3. | Connected audio source is switched off. | 3. | Switch audio source on to feed signal to |
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| transmitter input. |
| 4. | Wrong input selected. | 4. | Activate the input that is actually used (see |
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| sections 4.3.1 and 4.3.2). |
No sound. | 5. | INPUT control is at zero. | 5. | Turn up INPUT LEVEL control (refer to sec- |
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| tions 4.2.1 and 4.2.2) |
| 6. | Volume control on audio source is set too | 6. | Increase audio source volume to the point |
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| low. |
| that transmitter switches on. |
| 7. | Batteries in wireless headphones are low. | 7. | Charge batteries. |
| 8. | Wireless headphones are switched off. | 8. | Switch wireless headphones on. |
| 9. | Volume control on headphones is at zero. | 9. | Set volume control to desired level. |
| 10.Transmitter cannot process digital input | 10.Set DVD player output to "PCM", "D- | ||
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| signal. |
| PCM", or "Dolby Digital PCM". (Refer to |
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| DVD player manual.) |
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| 1. | Connected audio source operates in mono | 1. | Switch audio source to stereo mode. |
Mono sound |
| mode. |
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|
| 2. | Transmitter is not correctly connected to | 2. | Check cable connection between transmit- |
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| audio source. |
| ter and audio source. |
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| 1. | Audio level at transmitter input is too low. | 1. | Turn up audio source volume control |
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| and/or INPUT LEVEL control on transmit- |
Noise |
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| ter. |
| 2. | Input signal is noisy. | 2. | Check audio source. |
| 3. | Batteries in wireless headphones are low. | 3. | Charge batteries. |
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| 1. | Audio level at transmitter input is too high. | 1. | Turn down audio source volume control |
Distorted sound |
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| and/or INPUT control on transmitter. |
| 2. | Batteries in wireless headphones are low. | 2. | Charge batteries. |
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| 1. | Electrical appliances with poor interference | 1. | Switch off any "suspicious" appliances (if |
Intermodulation noise |
| protection. |
| possible). |
| 2. | Audio source or sound carrier defective. | 2. | Check audio source or sound carrier. |
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Headphones receive unwanted | • | A neighbor uses similar UHF headphones. | • | Set transmitter and headphones to same |
transmitters |
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| channel. |
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Overemphasized bass or treble range | • | Bass or treble control settings on audio | • | Readjust bass or treble controls. |
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| source. |
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| 1. | Transmitter and headphone carrier fre- | 1. | Set transmitter and headphones to same |
Beep sounds heard on wireless |
| quencies do not match. |
| channel. |
headphones | 2. | No or weak reception. | 2. | Change listening position, move closer to |
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| transmitter. |
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| 1. | Interference from other equipment. | 1. | Set transmitter and headphones to a differ- |
Momentary reception dropouts |
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| ent channel. |
(crackling) | 2. | Signal too weak due to reception distur- | 2. | Change listening position, move closer to |
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| bances. |
| transmitter. |
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DIGITAL label flashes twice, transmitter | • | Transmitter cannot process input signal. | • | Set DVD player output to "PCM", "D- |
switches from digital to analog input. |
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| PCM", or "Dolby Digital PCM". (Refer to |
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| DVD player manual.) |
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20
HEARO 888 DIGITAL
