AKG K 910, Инструкция пользователя

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7 Important Notes
1. Operating switches on or connecting the transmitter to
your audio source may cause clicks which at high volume
settings may affect your hearing. Therefore, be sure to set
the VOLUME control on the headphones to minimum
before switching between different sources (tuner,
turntable, CD player, etc.) or connecting the transmitter.
2. Listening over headphones at high volume levels, particularly
over extended periods of time, may damage your hearing.
3. Your K 910 is a radio frequency device that conforms
to the strict European standards. For physical reasons
that have nothing to do with the quality of the product,
extremely strong interference sources may affect
reception. In order to maintain interference-free listening
pleasure, do not operate your K 910 in the close vicinity
of radio equipment, cellular telephones, or directly above TV
or computer monitor picture tubes (see fig. 12).
The supplied connecting cable is long enough to allow the
transmitter to be placed at a safe distance from
interference sources.
Interference caused by other users of the same frequency
band is beyond AKG’s control.
8 Specifications
>
SYSTEM PERFORMANCE
Modulation: FM
Carrier frequency band: 864 MHz (LPD band) or 916 MHz
Selectable carrier frequencies: FREQ 1: 863.5/915.5 MHz
FREQ 2: 864.0/916.0 MHz
FREQ 3: 864.5/916.5 MHz
>
T 910 TRANSMITTER
Power supply: 12 V DC, 200 mA
Radiation angle: approx. 360°
Max. radiated power: 10 mW ERP (Equivalent Radiated Power)
Max. range (free field*): 916 MHz: approx. 100 ft. (30 m)
864 MHz: approx. 330 ft. (100 m)
Weight: approx. 10 oz. (280 g)
> K 910 HEADPHONES
Power supply: 3 VDC (2 x 1.2 V, 550 mAh AAA size
NiMH rechargeable batteries supplied)
Battery life: approx. 15 hours (NiMH rechargeable batteries)
Frequency range:: 18 Hz – 20.000 Hz
Max. SPL: ~ 105 dB SPL
Distortion: ≤ 1%
Type: semi-open dynamic headphones
Weight(inc. of batteries): approx. 10 oz. (280 g)
* under ideal transmission conditions
This equipment in its 864 MHz version conforms to the
standards listed in the Declaration of Conformity.
To order a free copy of the Declaration of Conformity,
visit
http://www.akg.com or contact sales@akg.com .
9 Troubleshooting
>
SYMPTOM
No sound
POWER ON/CHARGE LED
are not lit
Mono sound on
headphones
Loud noise
Distorted sound
>
POSSIBLE CAUSE
1.
AC adapter is not connected to transmitter
and/or AC outlet.
2. Transmitter is not connected to audio source.
3. Connected audio source is switched off.
4.
Volume control on audio source is at zero.
5. Batteries are low.
6. Headphones are switched off.
7. VOLUME control on headphones is at zero.
1. Transmitter is not connected to AC power.
2. Batteries are not correctly aligned with
polarity marks.
3. Headphones are incorrectly positioned on
transmitter.
1. Connected audio source operates in
mono mode.
2. Transmitter is not correctly connected to
audio source.
1. Transmitter and receiving frequencies are
not identical.
2. Audio level at transmitter input is too low.
3. Input signal is noisy.
4. Batteries are dead.
5. Transmitter position.
1. Audio level at transmitter input is too high.
2. Transmitter and headphones carrier
frequencies do not match.
3.
Batteries are dead.
>
REMEDY
1.
Connect AC adapter to transmitter and/or
AC outlet.
2. Connect transmitter to audio source.
3. Switch audio source on to feed signal to
transmitter input.
4. Set audio source volume to desired level.
5. Charge batteries.
6. Switch headphones on.
7. Set VOLUME control to desired level.
1. Connect transmitter to AC power.
2. Check orientation of batteries in battery
compartment.
3. Place headphones on transmitter correctly.
1. Switch audio source to stereo mode.
2. Check cable connection between transmitter
and audio source.
1. Press AUTOTUNING switch on headphones
or use FREQ selector to select different
carrier frequency and press AUTOTUNING
on headphones.
2. Increase audio source volume.
3. Check audio source.
4. Charge batteries.
5. Relocate transmitter (refer to fig. 11).
1. Decrease audio source volume..
2. Use FREQ selector on transmitter to select
different carrier frequency and press
AUTOTUNING switch on headphones.
3. Charge batteries.
ENGLISH
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21752_CorpDes_AKG_BDA_910_Int_0807.indd 16-17 11.09.2007 9:41:33 Uhr