Roland SUPER Octave OC-3, Service Notes

Page: 11 / 16

11
OC-3
7. MUTE Check
• Confirm that the MODE control is set to POLY. CHECK lights up.
• Use the oscillator to input a sine wave at 200 Hz, +5 dBm (FLAT) to
GUITAR IN or BASS IN.
• Check the waveform output from both OUTPUT (MONO) and DIRECT
OUT with the oscilloscope. Confirm that the waveform is the same as
that shown in the figure.
fig.test-MUTE_50
1V/DIV, 1mS/DIV
• Check the output level from both OUTPUT (MONO) and DIRECT OUT
with the noise meter. Confirm that each waveform output is FLAT and at
or below -74 dBm.
8. MODE Volume Check
• Confirm that CHECK lights up when the MODE control is set to POLY.
• Set the MODE control is to OCT2. Confirm that CHECK goes off.
• Set the MODE control is to DRIVE. Confirm that CHECK lights up.
Rotate the knob slowly and firmly.
9. DSP THRU MAXIMUM Output
Check
• Confirm that the MODE control is set to DRIVE.
• Use the oscillator to input a sine wave at 200 Hz, +5 dBm (FLAT) to
GUITAR IN or BASS IN.
• Check the waveform output from both OUTPUT (MONO) and DIRECT
OUT with the oscilloscope. Confirm that the waveform is the same as
that shown in the figure and that there is no distortion.
fig.test-MAXdsp_50
1V/DIV, 1mS/DIV
• Check the output level from both OUTPUT (MONO) and DIRECT OUT
with the noise meter. Confirm that each is FLAT and b3 dBm
and +6 dBm.
10. BYPASS MAXIMUM Output Check
• Press the pedal.
• Confirm that CHECK goes off and then comes on again (exiting Test
mode).
• Press the pedal again, and confirm that CHECK goes off (so that the
effects are switched off).
• Use the oscillator to input a sine wave at 200 Hz, +5 dBm (FLAT) to
GUITAR IN or BASS IN.
• Connect plugs to both the OUTPUT (MONO) and DIRECT OUT jacks,
and check the waveform output from both jacks with the oscilloscope.
Confirm that the waveform is the same as that shown in the figure, with
no waveform output from OUTPUT (MONO) and no distortion in the
waveform output from DIRECT OUT.
fig.test-MAXdout_50
1V/DIV, 1mS/DIV
• Check the output level from both OUTPUT (MONO) and DIRECT OUT
with the noise meter. Confirm that the DIRECT OUT output level is
FLAT and b3 dBm and +6 dBm, and that the OUTPUT (MONO)
output is FLAT and at or below -80 dBm.
• Disconnect the plug connected to the DIRECT OUT jack.
• Check the waveform output from OUTPUT (MONO) with the
oscilloscope. Confirm that the waveform is the same as that shown in the
figure and that there is no distortion in the waveform.
fig.test-MAXout_50
1V/DIV, 1mS/DIV
• Check the OUTPUT (MONO) output level with the noise meter. Confirm
that the output level is FLAT and b3 dBm and +6 dBm.