Roland EM-20 - Detailed Test Procedures; Keyboard, Audio Signal, and Speaker Output Tests; Display, Reverb, and Chorus Effect Tests

EM-20/EM-10
July, 1999
l Tc [tn2] (Only for EM-20)
Press the tn2 button and the Display will show:
Action: make sure that the value of the Touch controller ranges from 0 to 127 and changes
accordingly when moving your finger towards right (0/127) and towards left (127/0) When standing
still, the value shown must be 0.
To exit, press the tn8 Exit button.
l Lc [tn3]
Press the tn3 button and the Display will show:
Action : all the symbols and characters existing in the LCD display of EM-20/EM-10 will be shown.
To exit, press the tn8 Exit button.
G tn2 * K Keyboard check
Press the tn2 button and the display will show:
Key yy Velocity zzz yy = {0, C# }
zzz = {Off,1,...,127}
Action : Press some keys of the keyboard, you'll hear a piano sound. The display will show the number
of the pressed key, its name and velocity value.
To exit, press the tn8 Exit button.
G tn3 * A Audio check
Press the tn2 button and the display will show:
l Si [tn1]:
If you press the tn1 button, you'll enter the Audio test.
Before carrying out the audio check, make sure that the AC/DC adaptor is the ACO 12V 1A (230V) type
for the mod. EM-20, and that it is the ACN 500mA 12V (230V) type for the mod. EM-10.
Action : A sine wave sound having a 440 Hz frequency will be heard from the right speaker while a sine
wave sound having a 1760 Hz frequency will be heard from the left speaker.
Check the signal width and make sure that it is 5 Vpp on the right channel and that it is 5.2 Vpp on the left
channel for the mod. EM-10; whereas it should be 6 Vpp on the right channel and 6.2 Vpp on the left
channel for the mod. EM-20. Consider a 5% tolerance value for both models as the above values are
determined by a resistor divider.
To exit, press the tn8 Exit button.
NOTE
NOTE The Audio test can be carried out also when turning the instrument on.
This procedure is described further on. page 23 [* Audio Test tn2 on "power on"].
Display : Sin Wave
Display : Si Ft Ef
Display : YYYY XXXX
Display : Tch 0/127
l Ft [tn2]:
Press the tn2 button and the display will show:
l W1 [tn1]:
Then press tn1 "W1", and the display will show:
Action : A sine wave sound having a 100 Hz frequency will be heard from both, the right and
the left speakers.
To exit, press the tn8 Exit button.
l W2 [tn2]:
Then press tn2 "W2", and the display will show:
Action : A sine wave sound having a 1000Hz frequency will be heard from both, the right and
the left speakers.
To exit, press the tn8 Exit button.
l W3 [tn3]:
Then press tn3 "W3", and the display will show:
Action : A sine wave sound having a 10000Hz frequency will be heard from both, the right
and the left speakers.
To exit, press the tn8 Exit button. To get back to the Main Menu press tn8 Exit again
l Ef [tn3]:
By pressing the tn3 button, the display will show:
Rev = tn1 REVERB Reverb Test
Cho = tn2 CHORUS Chorus Test
l Rev [tn1]:
By pressing the tn1 button, the display will show:
Action : A drum sound with a marked reverb effect will be heard from both speakers. The quality
level of the reverb effect has to be assessed by ear.
NOTE: Due to a multitasking problem, the first drum sound may result to have a less marked
reverb effect than the following ones.
To exit, press the tn8 Exit button. To get back to the Main Menu press tn8 Exit again
l Cho [tn2]:
By pressing the tn2 button, the display will show:
Action : A square wave sound enriched with the chorus effect will be heard from both speakers.
The quality level of the chorus effect has to be assessed by ear.
To exit, press the tn8 Exit button. To get back to the Main Menu press tn8 Exit again
Display : Chorus
Display : Reverber
Display : Rev Cho
Display : 10000Hz
Display : 1000Hz
Display : 100Hz
Display : W1 W2 W3
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