Roland Juno-GJ Service Notes page 19

Apr. 2006
All Over
fig.19
Nothing
fig.20
At last, press the [F6] button to advance to the next test item.
10. AD
Checks the functions of rotary volume or slide volume.
When entering the AD test, the following message appears in the screen.
fig.21
Except for the VOLUME knob and the AUDIO INPUT LEVEL knob on the rear
panel, rotate or slide all knobs, sliders, the pitch bend lever and the expression
pedals connected to the CONTROL jack and the HOLD jack one by one from
MAX to MIN within available range.
* Set the knob of EV-5 to 0.
Check the color of the corresponding bar changes light when each knob/slider
is adjusted to MIN.
When all bars change light and test result is OK, the test program advances to
the next test item automatically.
20
11. Mute
Checks the muting circuit.
When entering the Mute test, the following message appears in the screen and
the built-in demo song starts to play.
fig.22
Rotate the VOLUME knob toward the MAX position slowly, confirm the
sound is outputted from the PHONES jack.
Next, confirm the sound is muted while the [F4] button is pressed.
Press the [F6] button to advance to the next test item.
12. MIDI
Checks the MIDI signal flows correctly.
When entering the MIDI test without connecting MIDI IN and MIDI OUT with
a MIDI cable, the following message appears in the screen.
fig.23
Connect MIDI IN and MIDI OUT with a MIDI cable. When the test is OK, the
test program advances the next test item automatically.
13. Sound
Checks the audio input/output circuit.
Step 1/4 PHONES
Checks the audio signals (L and R) from the PHONES jack.
When the following message appears in the screen, connect an oscilloscope to
the PHONES jack.
fig.24
Adjust the VOLUME knob to MAX, and confirm the following audio signals
are outputted correctly.
L: 110 Hz sine wave
R: 220 Hz sine wave
After confirming, press the [F6] button.
JUNO-G/JUNO-G (J)