Roland EXR-5, Service Note

Page: 18 / 35

Oct.2003
20
Pressing button 1, the display visualizes:
SINE
Test procedure:
1. Insert a stereo jack into the headphones socket;
2. Put the volume potentiometer at max;
3. Check by an oscilloscope that the signals at the stereo jack have the following
values (tol/- 5%):
LEFT RIGHT
Amplitude 3,10Vpp 3,30Vpp
Frequency 880Hz 1760Hz
To exit press button 0 (Exit).
NOTE:
The audio test can also be carried out when powering on. In order to do it, turn the instrument on
while keeping the button 3 pressed.
Frequency test (FT test)
Pressing button 2 you enter
FT
test. The display visualizes:
Pressing button 1, you hear a sine sound of 100 Hz coming from both right and left loudspeakers
and the display visualizes:
To exit press button 0 (Exit).
If you press button 2, you hear a sine sound of 1000 Hz coming from both right and left
loudspeakers and the display visualizes:
To exit press button 0 (Exit).
If you press button 3, you hear a sine sound of 5000 Hz coming from both right and left
loudspeakers and the display visualizes:
To exit press the button 0 (Exit)
twice
.
f 1 f 2 f 3
100 Hz
1000 Hz
5000 Hz