Roland GT-6 Service Notes page 14

Sep. 2001
fig.LCD13
2) Pressing further (maximum value) displays "***" on the right display.
fig.LCD10
or
fig.LCD14
3) Finally, returning the pedal forward (minimum value) displays "***" on the
left display, and the inspection for that pedal is complete.
fig.LCD11
or
fig.LCD15
After the EXP PEDAL inspection completes, it will automatically proceed to
the next inspection.
7.
Battery
fig.LCD16
The voltage of the memory backup battery is displayed.
To proceed to the next inspection, press the [EXIT] button.
8.
MIDI IN/OUT
fig.LCD18
Connect the MIDI IN connector and the MIDI OUT connector with a MIDI
cable.
"No Connect" is displayed if the connectors are not connected with a MIDI
cable.
If the connectors are properly connected, "Verify OK !" is displayed.
After the MIDI IN/OUT inspection completes, it will automatically proceed to
the next inspection.
fig.LCD17
9.
OUTPUT D/A
Note : Check both L(MONO) and R.
Also, when the OUTPUT jack is used for a single channel, the L and R
signals will be internally mixed, therefore, empty plugs must be inserted
in the R channel for L(MONO) channel measurement and in the
L(MONO) channel for R channel measurement, respectively.
fig.LCD19
16
Confirm these three points.
A) Using an oscilloscope, observe that a short wave is obtained from OUTPUT
.
B) Since output mute is automatically made 'On/Off', make sure that it is on.
C) Confirm that the level changes when the OUTPUT knob is turned.
fig.LCD20
Oscilloscope : 1.0 V/DIV, 0.5 ms/DIV
Mute = Off Mute = On
fig.1
fig.2
D) Confirm that a same waveform as that from OUTPUT is obtained from
Phones.
E) Confirm that a short wave is obtained from Send and that mute is effective.
Oscilloscope : 1.0 V/DIV, 0.5 ms/DIV
Mute = Off Mute = On