Bosch PRA MultiPower Original Instructions Manual page 16

16 | English
The battery charge-control indicator b indicates the current
battery pack status. When the battery charge-control indica-
tor flashes, the battery pack must be charged.
Indication Capacity
2/3
1/3
<1/3
Reserve
Battery pack empty
To remove a battery, open the lid 27 of the storage compart-
ment.
– Operation with 10.8 V battery: Press the unlocking but-
tons 34 on the battery and pull it out of the battery port 24.
– Operation with 14.4/18 V battery: Press the unlocking
button 34 on the battery and pull it off the battery recepta-
cle 25.
Operation with Power-supply Plug
 Observe the mains voltage! The voltage of the power
source for the power-supply plug must correspond with
the data on the type plate of the power-supply plug.
Open the protective cap of the 12 V connection socket 11. In-
sert the plug-in connector 30 of the 12 V power-supply plug
into the 12 V connection socket 11. Connect the power-sup-
ply plug to the mains supply.
 Use only the original Bosch power-supply plug intend-
ed for your radio. This measure alone enables trouble-
free operation of the radio.
When you remove the plug-in connector, close the protective
cap of the 12 V connection socket 11 again to protect against
dirt.
The power-supply plug 31 can be stored in the storage com-
partment of the radio when it is not being used. To do so, open
the lid 27 of the storage compartment. Place the power-sup-
ply plug with the mains connection in the receptacle 22.
Inserting/Replacing the Back-up Battery
Back-up batteries must be inserted to store the time and radio
stations on the radio. Alkali-manganese batteries are recom-
mended for this.
Open the lid 27 of the storage compartment. If necessary, re-
move the power-supply plug 31.
To open the battery lid 21, press the latch 20 and remove the
battery lid. Insert the back-up batteries. When inserting, pay
attention to the correct polarity according to the representa-
tion on the inside of the battery lid.
Mount the back-up battery lid 21 again.
Replace the back-up batteries if the time is no longer stored
on the radio and the display dims.
Always replace all batteries at the same time. Only use batter-
ies from one brand and with the identical capacity.
 Take the back-up batteries out of the radio when you
are not using it for a prolonged period of time. The back-
up batteries can corrode and self-discharge during pro-
longed storage.
1 609 92A 12F | (9.2.15)
Operation
 Protect the radio against moisture and direct sunlight.
The radio is suitable only for use in dry indoor areas.
Audio Operation
Switching On and Off
To switch on the radio, press the On/Off button 1. The dis-
play 2 is activated and the audio source selected the last time
the radio was switched off will be played.
Each time after pressing a button, the display 2 is illuminated
for several seconds.
To switch off the radio, press the On/Off button 1 again. The
currently selected audio source will be stored.
To save energy, only switch the radio on when you are using it.
Adjusting the Volume
A medium volume (value of 10) is always set when you switch
on the radio.
To increase the volume, press the "Vol +" button 7; to reduce
the volume, press the "Vol –" button 8. The volume setting
"VL" is indicated with a value between 0 and 20 for a few sec-
onds in indicator f on the display.
Before adjusting or changing a radio station, set the volume to
a lower setting; before starting an external audio source, set
the volume to medium.
The sound can be switched off by pressing the "Mute" button
5. To switch the sound on again, either press the "Mute"
button 5 once more or either of the "Vol +" 7 or "Vol –" but-
tons 8.
Adjusting the Sound
An equalizer is integrated into the radio to ensure optimum
sound reproduction.
To change the bass level manually, press the "EQ" button 15
once. The display will show "BA" and the stored bass level in
indicator f. Press the "Equalizer" button 15 again for the
treble. "TR" and the stored treble level will be shown in indi-
cator f.
The bass and treble levels can be adjusted between –5 and
+5. To increase the indicated value, press the "Vol + " button
7; to lower the value, press the "Vol –" button 8. The
changed values are automatically stored when indicator f
changes back to the time indication a few seconds after last
pressing either of the buttons.
Selecting an Audio Source
To select an audio source, press the "Source" button 18 re-
peatedly until the required internal audio source (see "Set-
ting/Storing Radio Stations", page 17) or external audio
source (see "Connecting External Audio Sources", page 17)
is shown on the display:
– "FM": FM radio,
– "AM": AM radio,
– "BT": External audio source (e.g. smartphone) via the
Bluetooth® connection,
– "AUX 1": External audio source (e.g. smartphone or CD
player) via the "AUX 1" 3.5-mm socket 26 on the outside,
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