Roland Juno-GJ Service Notes page 20

Apr. 2006
Step 2/4 INPUT (LINE), OUTPUT A
Checks the AUDIO INPUT, OUTPUT A and AUDIO INPUT LEVEL knob.
The following message appears in the screen.
fig.25
1.
Connect an oscillator to the AUDIO INPUT L and R jacks, and connect an
oscilloscope to the OUTPUT L and R jacks.
2.
Adjust the VOLUME knob to MAX, and adjust the AUDIO INPUT
LEVEL knob to MIN.
3.
Input the following Input Signal 1 to AUDIO INPUT L and R.
Input Signal 1: Stereo Sine Wave, 1 kHz, 2 V pp
4.
Check the output signals from OUTPUT A L and R change (increase or
decrease) correctly correspond to the operation of the AUDIO INPUT
LEVEL knob.
5.
When the AUDIO INPUT LEVEL knob is adjusted to MAX, confirm the
output signals of OUTPUT A L and R are as Output Signal 1.
Output Signal 1: Stereo Sine Wave, 1 kHz, 6 V pp
6.
Next, when inputting Input Signal 2 to AUDIO INPUT L and R, confirm
the output signals of OUTPUT A L and R change to Output Signal 2.
Input Signal 2: Stereo Sine Wave, 20 kHz, 2 V pp
Output Signal 2: Stereo Sine Wave, 20 kHz, 4.8 V pp
7.
After confirming, press the [F6] button.
Step 3/4 INPUT (LINE), OUTPUT B
Checks the OUTPUT B.
The following message appears in the screen.
fig.26
1.
Remove the connections of the OUTPUT A L and R jacks, and connect the
oscilloscope to the OUTPUT B L and R jacks.
2.
Adjust both the VOLUME knob and the AUDIO INPUT LEVEL knob to
MAX.
3.
When inputting the following Input Signal 1 to AUDIO INPUT L and R,
confirm the output signals of OUTPUT B L and R are like Output Signal
1.
Input Signal 1: Stereo Sine Wave, 1 kHz, 2 V pp
Output Signal 1: Stereo Sine Wave, 1 kHz, 6 V pp
4.
Next, when inputting Input Signal 2 to AUDIO INPUT L and R, confirm
the output signals of OUTPUT B L and R change to Output Signal 2.
Input Signal 2: Stereo Sine Wave, 20 kHz, 2 V pp
Output Signal 2: Stereo Sine Wave, 20 kHz, 4.8 V pp
5.
After confirming, press the [F6] button.
Step 4/4 INPUT (MIC), OUTPUT A
Checks the MIC input.
The following message appears in the screen.
fig.27
1.
Remove the connection of the AUDIO INPUT R, and leave the connection
of L (MONO)/MIC as it is.
2.
Adjust both the VOLUME knob and the AUDIO INPUT LEVEL knob to
MAX.
3.
When inputting the following Input Signal 1 to AUDIO INPUT L
(MONO)/MIC, confirm the output signal of OUTPUT A L (MONO) is
like Output Signal 1.
Input Signal 1: Mono Sine Wave, 1 kHz, 0.16 V pp
Output Signal 1: Mono Sine Wave, 1 kHz, 6 V pp
4.
After confirming, press the [F6] button.
14. USB
Checks the function of USB.
When entering the USB test, the following message appears in the screen.
fig.28
Connect the JUNO-G and PC (equipped with an USB connector, OS: Windows
Me/2000/XP) with an USB cable.
When they are connected correctly, the message Status: Connect appears.
Cancel the connection with the JUNO-G by device eject button shown in the
taskbar at the lower right of the PC screen.
If the test is OK, the test program advances to the next test item automatically.
JUNO-G/JUNO-G (J)
21