Aiwa XR-EM20 manual basically have the same function, Remote control

Remote control		DISPLAY	7 FUNCTION
		PROGRAM	Switches the active function among TAPE, TUNER, AUX
1	7		and CD.
		Selects programmed CD playback mode.
			8 PRESET +,-
		TIMER
2			Tunes in a preset station.
		Selects timer mode.
			9 f/r, t/g
En		SLEEP
			0 VOLUME +,-
3	8	Selects sleep-timer mode.
4		RANDOM/REP	! TONE
5	9	Selects random or repeat CD playback mode.
6	0	CD EDIT/CHECK
		Selects edited CD recording.
	!

3REC/REC PAUSE

Starts and pauses recording when pressed with SHIFT held down.

Buttons with the same or similar names on the main unit		REC MUTE
		Enters 4-second blank spaces during recording.
basically have the same function.
		4 ECD
1	POWER
		AUX
2	0–10, +10
		Select the function of external equipment connected to

CD: selects a track of the specified number.	AUX IN jacks.
Radio: tunes in the station with the specified preset
	cTAPE
number.
The numbered buttons take on these functions when pressed with	TUNER/BAND
	Selects Radio function and the radio band.
SHIFT held down:
CLOCK	sCLEAR

Selects clock mode.

TUNER MODE

Switches between stereo or monaural FM reception.

5SET

Determines the mode.

Stores the received station to preset.

6SHIFT

Hold down when pressing a numbered button to change its function to that printed above the number.

6