Hama 00089321, Быстрый старт

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8. Troubleshooting
Problem: Poor reception
Solution:
• Is aerial coupler AC-1 plugged into the base unit, or are you using the blind
coupler (this has no cable)?
• Plug aerial coupler AC-1 into the base unit and attach the aerial.
• Is the aerial connected correctly Is it attached to the screen? Is it at the right
distance from the car body? All parts of the aerial should be at least 4 cm from
the car body for optimal functionality.
• If reception is still bad, try the blind coupler. (Excluding the possibility of a
coupler, aerial or cable malfunction).
• Check the connection to the aerial or change the aerial coupler.
Problem: Buzzing noise:
In rare cases, your conversation partner may hear buzzing noises intermittently during
conversations.
Solution: Gradually push the mobile phone upwards, checking repeatedly at which
point the buzzing stops. For some mobile phones, the optimal position is when the
device protrudes some 15 mm from the base unit.
Note: If during a conversation you touch both mobile phone and hand-free set
simultaneously, buzzing noises may result. This is perfectly normal as your hand
transmits the radio waves.
Problem: Recharging problem
Solution: Check to see if the recharger functions with a different mobile phone. Have
you used the right adapter? If the charging cable is defective, please contact our
service department.
Problem: The holder presses buttons/does not fi t (clamping jaws of the
hands-free set).
Solution:
With some mobile phones with buttons on the sides, closing the clamping jaws may
permanently hold down a button on the mobile telephone.
This can be remedied by cutting away the foam of the clamping jaw in the respective
area. Do so with extreme care.
Problem: Device does not function
Solution: Check whether the green LED of the HTM-7 lights up. If not, verify whether
the 12 V cable has been properly plugged in.
7.6 Changing aerial couplers and connecting external aerial
In order to swap the pre-mounted blind aerial coupler for another one, you must fi rst
detach it from the base unit. Take the base unit in one hand, hold the blind aerial
coupler with the other hand, and pull it away from the base unit without snagging the
edges, (see Figure 7. It illustrates an aerial coupler that is removed half-way.)
Now plug the included AC-1 Type A aerial coupler into the base unit. Pay attention to
the guide rails on the base unit when doing so (do not apply force). Slide the aerial
coupler and base unit together until completely seated.
Place the window attachment aerial on a suitable location on the windscreen of your
vehicle. Carefully route the aerial cable to the aerial coupler. The aerial cable must
not be buckled or mechanically stressed!
Important: Neither the aerial nor the cable should obstruct the view or operation of
the car! If necessary, have the aerial mounted by a qualifi ed technician.
Now, connect the aerial cable plug to the FME socket of the aerial coupler.
7.7 Aerial coupler
7.7.1 Operating principle of the aerial coupler
The aerial coupler serves to reduce transmission and reception signal loss caused
by poor reception of radio waves that typifi es the use of a mobile phone in a car.
For optimum reception of radio waves, the mobile would have to be held directly on
the windscreen. In practice, however, the mobile phone transmits waves directly
inside the vehicle interior, which may improve transmission performance but reduce
connection quality.
The aerial coupler, however, channels the transmission signal directly from the mobile
phone and routes it to the included aerial. This included aerial is affi xed directly to the
windscreen.
In many cases, depending on how the signal fi eld strength is shown on the mobile
phone LC display, you can see the effect of the aerial coupler.
In areas with insuffi cient radio wave coverage, the mobile phone will, for example,
show only 50% signal fi eld strength (depicted on the LCD, for example, as two out of
four bars). If the mobile phone is properly adjusted, the aerial coupler can improve the
displayed strength from two to four bars.
Aerial coupler,
half-way detached
Fig. 7
All manuals and user guides at all-guides.com