ONKYO tx-nr646 User Manual

Details on AM/FM reception

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1.  Press TUNER on the main unit several times to select 

either "AM" or "FM".

2.  Press TUNING MODE so that the "AUTO" indicator on 

the display lights.

3.  Press  TUNING  to start automatic tuning.

● Searching automatically stops when a station is 

found. When tuned into a radio station, the "

TUNED " indicator on the display lights. When 

tuned into an FM radio station, the "FM STEREO" 

indicator lights.

● No sound is output while the " TUNED " indicator 

is off.

When the signal from an FM radio station is weak: 

Radio wave may be weak depending on the building 

structure and environmental conditions. In that case, 

perform the manual tuning procedure as explained in the 

next section, "Tuning manually", to manually select the 

desired station.

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1.  Press TUNER on the main unit several times to select 

either "AM" or "FM".

2.  Press TUNING MODE so that the "AUTO" indicator on 

the display goes off.

3.  Press  TUNING  to select the desired radio station.

● The frequency changes by 1 step each time 

you press the button. The frequency changes 

continuously if the button is held down and stops 

when the button is released. Tune by looking at the 

display.

To return to automatic tuning: Press TUNING MODE 

on the main unit again. The unit automatically tunes into a 

radio station. Normally "AUTO" should be displayed.

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It allows you to directly enter the frequency of the radio 

station you want to listen to.
1.  Press TUNER on the remote controller several times to 

select either "AM" or "FM".

2.  Press D.TUN.

3.  Using the number buttons, enter the frequency of the 

radio station within 8 seconds.

● To enter 87.5 (FM), for example, press 8, 7, 5, or 

8, 7, 5, 0. If you entered the wrong number, press 

D.TUN and enter the correct one.

It allows you to register up to 40 of your favorite AM/FM 

radio stations. Registering radio stations in advance allows 

you to tune into your radio station of choice directly.

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1.  Tune into the AM/FM radio station you want to register.
2.  Press MEMORY on the unit so that the preset number 

on the display flashes.

3.  Press  PRESET  several times to select a number 

between 1 and 40 while the preset number is flashing 

(about 8 seconds).