Boss BF-3 User Manual download pdf (Page 9)

BF-3T

Check the waveforms output from both OUTPUTs A and B on the

oscilloscope.

Check that the output waveforms are the same as those shown in the

figure and that they are not distorted.

fig.test-lch_50

OUTPUT A : 50 mV/DIV, OUTPUT B : 500 mV/

DIV, 1mS/DIV

Measure the output levels of both OUTPUTs A and B with a noise meter

(JIS-A).

Check that the output levels are the same as those shown in Test Item 7

above.

Remove the DC plug quickly from the adapter jack, and check battery

operation.

Remove the plug quickly, or the machine will be reset. If the machine is reset

every time you remove the plug, the adapter jack contact or some other part

may be defective.

Check that the same waveforms are output and that “CHECK” LED (red)

is lit.

If the battery is exhauted, LED will light up gloomily.

Check again that the output waveforms are not distorted.

Remove the plug from BASS IN, and check that the “CHECK” LED goes

out with no waveforms shown (power off).

9. Noise Check

Connect a DC plug to the adapter jack, and a 47 k? short-plug to GUITAR

IN.

Set all the volume controls at to their maximum positions.

Check that “CHECK” LED (red) is lit.

Measure the residual noise of both OUTPUTs A and B with a noise meter

(JIS-A).

Check that the noise is -92 dBm or lower.

Press the pedal to turn off the “CHECK” LED (to form a bypass).

Measure the residual noise of both OUTPUTs A and B with a noise meter

(JIS-A).

Check that the noise is -100 dBm or lower.

Connect a monitor speaker to OUTPUT.

Drop the machine twice from a height of 10 cm to apply it shock.

Check that no abnormal noise occurs.

Turn the pedal on and off and turn each volume control, then check that

no abnormal noise occurs.

How to Exit Test Mode

Press the pedal to exit Test mode.

During volume checks 2 through 5, however, you exit volume check if

you press the pedal.

Press the pedal again to exit Test mode.

If an error is found during the DSP or CPU check mentioned in Test Item 1

above, you cannot exit Test mode by pressing the pedal. Remove the DC plug

from the adapter jack, and turn off the power of the machine.

The noise check mentioned in “9. Noise check” above is not done in

Test mode, it is done in Normal mode.

How to Test a Specific Item Only

Enter Test mode.

Release pedal. The system checks the DSP and CPU automatically as

mentioned in “1. Check of DSP and CPU” above. The “CHECK” LED

(green) light up if no problem is found.

Choose the next test item you want with MODE volume.

MOMENTARY: 2. - 5. Volume check

GATE/PAN: 6. CODEC(DAC)check

STANDARD: 7. CODEC(ADC)L ch check

ULTRA: 8. CODEC(ADC)R ch check

You can only do a volume check in the following order: RES -> MANUAL ->

DEPTH -> RATE.

If you do the noise check mentioned in “9. Noise check” above, don’t enter Test

mode, but do it in Normal mode after turning on the power of the machine.

Be sure to check all the test items before you ask for repair or when you check

and service the machine.

1 2 3 4 5 6 7 8 9 10 11 12

Comments to this Manuals

No comments

Boss BF-3 User Manual Page 9

Comments to this Manuals

Related products and manuals for Music Pedal Boss BF-3