Sennheiser HDR 145 User manual

HDR 145
Additional Headphones for RS 145 comfort
Instruction manual

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Contents
1
Contents
Important safety instructions ................................................ 2
The HDR 145 RF headphones ................................................. 4
Delivery includes ...................................................................... 4
Product overview ..................................................................... 5
Overview of the headphones ................................................ 5
Overview of the acoustic signals .......................................... 5
Putting the HDR 145 into operation ..................................... 6
Inserting and changing the headphones’
rechargeable batteries ........................................................... 6
Charging the headphones’ rechargeable batteries .......... 6
Adjusting the headband of the headphones ..................... 7
Using the HDR 145 ................................................................... 8
Switching the headphones on and off ................................ 8
Searching for a sound source ................................................ 9
Adjusting the volume ............................................................. 9
Adjusting the balance .......................................................... 10
Switching the acoustic signals (beeps) on and off ........ 10
Cleaning the HDR 145 ........................................................... 11
If a problem occurs ... ............................................................ 12
Accessories and spare parts ................................................. 13
Specifications .......................................................................... 13
Manufacturer Declarations ................................................... 14

Important safety instructions
2
Important safety instructions
• Please read this instruction manual carefully and
completely before using the device.
• Make this instruction manual easily accessible to all users
at all times. Always include this instruction manual when
passing the device on to third parties.
• Do not use the device in situations which require special
attention (e.g. when performing skilled jobs).
• Always keep the device dry and do not expose it to extreme
temperatures.
Intended use of the device
Intended use includes:
• having read this instruction manual, especially the chapter
“Safety instructions”,
• using the device within the operating conditions and
limitations described in this instruction manual.
“Improper use” means using the device other than as
described in this instructions, or under operating conditions
which differ from those described herein.

Important safety instructions
3
Safety instructions for NiMH rechargeable batteries
If abused or misused, rechargeable batteries may leak. In
extreme cases, they may even present
Please understand that Sennheiser does not accept liability
for damage arising from abuse or misuse.
• a heat hazard,
• a fire hazard,
• a leakage hazard,
• an explosion hazard,
• a smoke or gas hazard.
Keep away from children. Only use original Sennheiser
rechargeable batteries.
Observe correct polarity. Do not short-circuit.
Do not expose to
moisture.
Switch rechargeable battery-
powered devices off after use.
Do not pack charged bat-
teries loose – danger of
shorting out/ fire hazard.
Only charge rechargeable
batteries with the appropriate
Sennheiser chargers.
Do not continue to use
defective rechargeable
batteries.
Do not heat above 70 °C/158 °F,
e.g. do not expose to sunlight or
throw into a fire.
Do not mutilate or
dismantle.
Only charge rechargeable bat-
teries at ambient temperatures
between 10 °C and 40 °C.
Immediately remove
rechargeable batteries
from obviously defective
devices.
Dispose of rechargeable
batteries at special collection
points or return them to your
specialist dealer.
When not using rechargeable batteries for extended periods of
time, charge them regularly (about every three months).

The HDR 145 RF headphones
4
The HDR 145 RF headphones
The HDR 145 headphones are part of the RS 145 comfort RF
stereo hi-fi headphone system. The closed, circumaural RF
stereo headphones offer excellent sound quality and allow for
wireless listening everywhere in the house and garden.
The lightweight headphones are extremely comfortable to
wear and very easy to use. The volume can easily be adjusted
to individual needs. Enjoy a completely unrestricted listening
experience without disturbing others.
Delivery includes
1 HDR 145 headphones
2 AAA size NiMH rechargeable batteries, 1.2 V
1 instruction manual

Product overview
5
Product overview
An overview of the headphones is given on the inside front
cover of this instruction manual.
Overview of the headphones
1Headband
2Volume control
3TUNE button
4Balance control for R/L volume adjustment
5ON/OFF switch
6Earpad
Overview of the acoustic signals
Acoustic signal Meaning
6 short beeps No signal!
Transmitter is switched off
or out of range.
2 long beeps Rechargeable batteries are
almost flat.
Sequence of
3 beeps
Headphones have been
switched off.

Putting the HDR 145 into operation
6
Putting the HDR 145 into operation
Inserting and changing the headphones’
rechargeable batteries
Before using the HDR 145 for the first time, you have to insert
the supplied rechargeable batteries.
왘Lift the left earpad 6off as described under “Replacing the
earpads” on page 11.
Charging the headphones’ rechargeable batteries
왘Insert the rechargeable batteries. Observe
correct polarity when inserting the
batteries.
왘Put the earpad 6back in place.
If the operating time decreases drastically even when
the rechargeable batteries are fully charged, the
rechargeable batteries are exhausted and have to be
replaced.
Charge the rechargeable batteries for at least 16 hours
prior to first time use. Subsequent charging time is
about the same time as the previous operating time.
The operating time is up to 23 hours.
왘Place the headphones on the
charging cradle. Make sure that
the charging indictor on the
transmitter lights up red.
The headphones automatically
switch off and the rechargeable
batteries are being charged.
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