21
Jun. 2014 GP-10
08:GK SW/VOL
fig.test8.eps
* Before connecting the GK-3, turn the GK volume on the GK-3 all the way
clockwise and adjust the selector switch to MIX.
1. Connect the GK-3 to the GK IN connector.
2. Working in sequence, switch the GK-3 buttons displayed on the screen.
Sequence: DOWN/S1 –> UP/S2
3. Working in sequence, switch the GK-3 selector switches displayed on the
screen.
Sequence: GUITAR –> GK –> MIX
4. Turn the GK volume counterclockwise slowly.
Verify that on-screen display in the sequence of MIN –> MID –> MAX
MAX –> MID –> MIN.
5. Turn the GK volume clockwise slowly.
After on-screen display in the sequence of MAX –> MID –> MIN
MIN –> MID –> MAX, the display automatically returns to the test-item
selection screen.
09:AUDIO
fig.test9-1.eps
Verification of GUITAR OUT waveform
1. Adjust the OUTPUT LEVEL knob to maximum.
2. Connect a signal generator to the normal input connector on the GK-3, set
the selector switch on the GK-3 to MIX, and input a signal like the one
shown below.
200-Hz, 2.0 Vp-p, rectangular wave
3. Connect the GK-3 to the GK IN connector.
4. Connect the oscilloscope to the GUITAR OUT jack.
Oscilloscope settings: 1.0 V/1.00 msec
5. Verify that signal like the one shown below is output.
GUITAR OUT: 2.0 Vp-p±0.5 V
fig.test9-2.eps
6. Insert the short plug (standard monaural) to the GUITAR IN jack and
verify that no signal is output from the GUITAR OUT jack.
fig.test9-3.eps
Verification of OUTPUT L/MONO and R waveform
7. Connect the oscilloscope to the OUTPUT L/MONO and R jacks.
Oscilloscope settings: 1.0 V/1.00 msec
8. Verify that signals like the ones shown below are output.
OUTPUT L/MONO, R: 2.0 Vp-p±0.5 V
fig.test9-4.eps
Verification of PHONES L/R waveform
9. Connect the oscilloscope to the PHONES jack.
Oscilloscope settings: 1.0 V/1.00 msec
10. Verify that signals like the ones shown below are output.
PHONES L/R: 2.0 Vp-p±0.5 V
fig.test9-5.eps
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