Roland V-Synth GT Service Notes page 32

May, 2007
13. MIC IN
This tests the audio signal input from the MIC IN connector and the operation
of the PHANTOM power source.
A screen like the one shown below is displayed on the LCD.
fig.13-micin.eps_90
Make sure the PHANTOM switch is set to OFF.
Input an audio signal to a dynamic microphone connected to the MIC IN
connector.
Make sure that output occurs at the MAIN OUT (L/R) connectors and that the
volume level changes when INPUT MIC LEVEL is turned.
Next, change the dynamic microphone connected to the MIC IN connector to a
condenser microphone.
Set the PHANTOM switch to ON.
Input an audio signal to the condenser microphone connected to the MIC IN
connector.
Make sure that output occurs at the MAIN OUT (L/R) connectors and that the
volume level changes when INPUT MIC LEVEL is turned.
If no problem is encountered, press [
14. XLR (PHANTOM)
A screen like the one shown below is displayed on the LCD.
fig.14-xlr-phantom.eps_90
No inspection is performed for this item.
* On reaching the next test item, "15. MUTE/BEEP," a hum is played at high
volume level. Turn down the VOLUME control.
Press [ ] to advance to the next test item.
] to advance to the next test item.
15. MUTE/BEEP
This performs verification of the MUTE circuit and the beep sound.
A screen like the one shown below is displayed on the LCD.
fig.15-mute-beep.eps_90
The hum is output from the MAIN OUT (L/R) connectors.
[-OCT] flashes and [+OCT] is lighted.
Make sure that the volume of the audio output from MAIN OUT is lowered
while [-OCT] is depressed.
Make sure that the volume of the audio output from MAIN OUT returns to its
original level when [-OCT] is released.
Make sure that a beep is played when [+OCT] is pressed.
If no problem is encountered, press [
16. S-BOARD
This verifies whether the S-Board is operating correctly.
A screen like the one shown below is displayed on the LCD.
fig.16-sboard.eps_90
This verifies the version of the S-Board program.
A SAX phrase is played and output from the MAIN OUT (L/R) connectors.
If no problem is encountered, press [
V-SYNTH/GT
] to advance to the next test item.
] to advance to the next test item.
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