Trevi MRA 784USB, User Manual

RC 

820

3

MRA 784USB

ENGLISH

1.  Power on LED
2.  Volume control
3.  AM/FM band selector
4.  Tuning control
5.  AUX-IN input
6. Speaker
7.  5V DC power supply input
8.  Telescopic antenna
9.  Battery compartment
10. PLAY/PAUSE >II key to start/stop playback. Holding  

it pressed, it switches between SD card and USB input  

and vice versa
11. Key 



, to select the previous track 

12. PLAY/PAUSE LED indicator (it blinks during playback  

and it is steadily on when the PAUSE function is active) 
13. SD/MMC card slot
14. 



 key, to select the next track

15. USB storage device port
16. RADIO/MP3 PLAYER function selector

SETUP

Open the battery compartment (9), insert four AA 1.5V 
batteries, carefully respecting the polarities indicated on the 
appliance. Close the battery compartment again.
As an alternative an external adapter (not supplied) can be 
used after connecting it to the DC 5V socket (7).

RADIO

1.  Make sure that the RADIO/MP3 PLAYER selector  
(16)    

is on the RADIO position (pressed).

2.  Switch on the radio through the volume adjusting knob    
(2), you will hear a click.
3.  Select the desired wave band using the AM/FM band  

selector (3).
4.  Select your favourite station using the tuning control  

(4). 
5. Adjust the volume by means of the volume control  

(2).

8

9

7

1

4

3

6

5

2

13
12

15

11 10 14

16

To obtain the best reception in FM, extend and point the 
antenna. If the reception is bad, try adjusting the length and 
orientation of the antenna. However, the FM reception quality 
depends very much on where the appliance is placed. 
The AM antenna is located inside the appliance; therefore you 
need to point the appliance to obtain the best reception. 

USB/SD CARD READER OPERATION

1.  Insert an SD memory card in the SD slot (13) or a USB  

device in the USB port (15).

Note: The player may not support some devices equipped with 
USB socket due to incompatibility with some processors.

2.  Make sure that the RADIO/MP3 PLAYER selector  

  (16) is on the MP3 PLAYER position (released).
3.  Switch on the radio through the volume adjusting knob    
(2), you will hear a click.
4.  After a few seconds the player will automatically start  

playing the detected audio tracks.
5.  Press the PLAY/PAUSE >II key (10) to activate the  

pause, the LED indicator (12) is steadily on.
6.  To disable the pause, press the PLAY/PAUSE >II key  

(10) again, the LED indicator (12) blinks.
7.  Press the 



 key (14) while listening to move to the  

next track. Press the 

 

key (11) to move to the   

previous one.
8.  If both the USB device and the SD card are connected  

it is possible to change the device currently read by the  

appliance by holding the PLAY/PAUSE >II key (10)  

  press for about two seconds.

AUX-IN INPUT

1.  Switch on the radio through the volume adjusting knob    
(2), you will hear a click.

Note: the position of the RADIO/MP3 PLAYER function selector 
(16) is not important during playback from an AUX IN input.

2.  Connect any unit with an audio output with the specific    
cable to the AUX-IN input (5).
3. Control the external unit with its controls.

CARE AND MAINTENANCE

This is a high-precision electronic appliance; do not use it in 
very humid or dusty places or subject to sudden rises/falls 
in temperature. Keep out of direct sunlight. Use a slightly 
damp soft cloth for cleaning. Avoid solvents and abrasive 
substances.

TECHNICAL FEATURES

Power supply: ....................................DC IN 5V
   ..........................................................4 x battery AA 1,5V
Frequency bands: ............................ FM 87.5 - 108 MHz 
   ..........................................................AM 526 - 1606 KHz
Size: ....................................................... 108x170x105mm