Roland SUPER Octave OC-3, Service Notes

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12
Sep.2003
11. Battery Check
• Press the pedal and confirm that CHECK lights up (so that the effects are
switched on).
• Confirm that a plug is connected to either the GUITAR IN jack or BASS
IN jack.
• Disconnect the DC plug from the adapter jack.
• Confirm that CHECK is lit.
If CHECK is dimmer than when used with the adapter, it indicates that the
batteries are going dead.
12. Noise Check
• Connect the DC plug to the adapter jack.
As this checks places a drain on the batteries, use the adapter when
performing this check.
• Confirm that CHECK is lit and that the effects are on.
• Turn all volume controls to maximum. Set the MODE to POLY.
• Connect the short plug (47 k ohm) at “GUITAR IN JACK”.
• Connect plugs to both the OUTPUT (MONO) and DIRECT OUT jacks
and check the residual noise from both jacks with the noise meter.
Confirm that both are JIS-A, at or below -92 dBm.
• Press the pedal so that CHECK goes off, switching off the effects.
• Check the residual noise from DIRECT OUT with the noise meter.
Confirm JIS-A at or below -98 dBm at.
• Connect the monitor speakers to DIRECT OUT.
• Shock-test the unit by dropping it from a height of 10 cm twice. Confirm
that the unit produces no unusual noise.
• Switch the pedal between ON and OFF, and confirm that no switching
noise is produced.
• Switch CHECK so that it is unlit and the effects are switched off.
• Disconnect the plug connected to the DIRECT OUT jack.
• Check the residual noise from OUTPUT (MONO) with the noise meter.
Confirm JIS-A, at or below -98 dBm.
• Connect the monitor speakers to OUTPUT (MONO).
• Shock-test the unit by dropping it from a height of 10 cm twice. Confirm
that the unit produces no unusual noise.
• Switch the pedal between ON and OFF, and confirm that no switching
noise is produced.
• Switch on the CHECK light so that the effects are switched on.
• Rotate each knob to confirm that the unit produces no unusual noise.
4. Exiting Test Mode
• The pedal can be pressed to exit Test mode.
“10. BYPASS MAXIMUM Output Check,” “11. Battery Check,” and “12. Noise
Check” are performed in Normal mode, and are not checked as part of the test
items.
5. Instructions for Performing
Only Desired Tests
• Refer to “2. Entering Test Mode” to switch to Test mode.
• The “DSP, CPU Check” is run automatically when the pedal is released,
and CHECK lights up if there are no errors.
• Rotate the MODE control to the desired test category.
DRIVE: Volume checks, DSP THRU Maximum Output Level.
OCT2: DAC, Jack Switch Check
POLY: MUTE Check, MODE Volume Check
The Volume checks cannot be run in the following sequence: DIRECT LEVEL,
OCT1 LEVEL, CONTROL.
The AF/AD Check is not selectable. It may be run after the Volume checks.
In addition, the DSP THRU Maximum Output Level cannot be run
immediately following the Volume checks. Run the test after switching the
MODE control back to DRIVE.
To run “10. BYPASS MAXIMUM Output Check,” “11. Battery Check,” or “12.
Noise Check,” turn on the power and perform them in Normal mode, without
switching to Test mode.
6. Precautions
Run all checks following repairs or servicing.