Operating Notes; Important Notes; Charging The Batteries In The Headphones; Replacing Batteries - AKG Acoustics HEARO 787 SURROUND Mode D'emploi

4 Operating Notes

4.1 Important Notes

Placing the transmitter:
Refer to fig. 8.
Refer to fig. 9.
Switching noise:
High volume levels:
Interference:
4.2 Charging the Batteries in
the Headphones
Important!
Important!
Refer to fig. 10 (a, b).

4.3 Replacing Batteries

Refer to fig. 12.
14
• Your HEARO 787 SURROUND is a radio frequency device that conforms to the strict European and FCC
standards. For physical reasons that are not related to the quality of the product, extremely strong inter-
ference sources may affect reception. In order to maintain interference-free listening pleasure, do not oper-
ate your HEARO 787 SURROUND in the close vicinity of radio equipment, cellular telephones, or directly
above TV or computer monitor picture tubes. The supplied connecting cables are long enough to allow the
transmitter to be placed at a safe distance from interference sources.
Reflections off metal surfaces may reduce the range of your transmitter. Therefore, be sure to place the
transmitter at least 8 inches (20 cm) away from any kind of metal surface.
• 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.
• Listening over headphones at high volume levels, particularly over extended periods of time, may damage
your hearing.
• Interference caused by other users of the same LPD band are beyond AKG's control.
If you operate the headphones on dry batteries, never try to charge the batteries using the transmit-
ter's charging feature. This would cause serious damage to your headphone system. Dispose of dead
batteries conforming to local waste disposal rules.
In order to ensure the longest possible service life for the rechargeable batteries, we deliver them
uncharged. Therefore, charge the supplied batteries before first operating your headphones system.
Note: Before first charging the batteries inside the headphones, pull the protective foil out of the left-hand earphone
following the direction of the arrow.
The batteries will make electrical contact with the electronic circuitry of the headphones.
Charging on the transmitter:
1. Check that the transmitter is connected to a
power outlet.
Since the charging function operates inde-
pendently of the rest of the transmitter circuitry,
you do not need to press the ON key (6) to charge
the batteries.
Refer to figs. 10, 1, and 2:
2. Place the headphones on the transmitter
The charging contacts on the transmitter and
those on the headphones will automatically close
the charging circuit and charging will start.
The CHARGE label (12) on the transmitter and the
status LED (1a) on the headphones will illuminate
red to indicate the batteries are being charged.
The batteries will be fully charged after approxi-
mately 14 hours. The CHARGE label (12) on the
transmitter and the status LED (1a) on the head-
phones will continue shining red.
3. Remove the headphones from the transmitter to
stop the charging. (The CHARGE label (12) on the
transmitter will go out. The status LED (1a) on the
headphones will extinguish if the headphones are
OFF or change to green if the headphones are ON.)
If you forget to remove the headphones, do not
panic. You can leave the headphones on the
transmitter for as long as you like without risking
to overcharge the batteries.
The capacity of any rechargeable battery will decrease over time. If you feel that you need to recharge the
supplied batteries more often than would be convenient, you may consider replacing the batteries with new
AAA size 1.2 V rechargeable or 1.5 V alkaline dry batteries.
1. Rotate the ear pad on the left-hand earphone approximately 10° CCW to unlock the bayonet mount and
remove the ear pad.
2. Remove the dead rechargeable or dry batteries.
3. Insert the new batteries aligning them with the polarity symbols inside the battery compartments (3) in the
earphone.
4. Replace the ear pad on the earphone and rotate the ear pad approximately 10° CW to the point that you
can feel it has locked.
Using the optional external charger:
Important: Check that the AC voltage stated on
the optional charger is identical to the AC volt-
age available where you will use your system.
Using the charger with a different AC voltage
may cause damage to the unit.
Refer to figs. 11, 1, and 2:
1. Plug the charging cable on the charger into the
charging jack (2a) on the headphones.
2. Plug the charger into a convenient power outlet.
The status LED (1a) on the headphones will illumi-
nate red.
The batteries will be fully charged after approxi-
mately 14 hours. (The status LED (1a) on the
headphones will continue shining red.)
3. Disconnect the charging cable from the charging
jack (2a) on the headphones to stop the charging.
The status LED (1a) on the headphones will extin-
guish if the headphones are OFF or change to
green if the headphones are ON.
If you forget to disconnect the charging cable, do
not panic. You can leave the headphones con-
nected to the charger for as long as you like with-
out risking to overcharge the batteries.
HEARO 787 SURROUND