EFC's Used on Various Versions of this Device
The efc's listed below can be used as a starting point for an upgrade. Often more than one EFC will be listed for a function. You'll need to test these to see which one works with your device.
Device: Audio / 0670        Brands
Protocol: Aiwa;
Devices: 343;  , ;   ;   ;    
Pid: 005E ; 
Fixed: EA 80; 
Function EFC
Volume + 015
Volume - 142
Mute 146
Power 019
 

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Function EFC
Volume +
Volume -
Mute
Power
 015
142
146
019