Roland JD-XA, Заметки по обслуживанию

Страница: 29 / 35

29
Jul. 2015 JD-XA
14. MIC IN (XLR)
This verifies the operation of the MIC INPUT (XLR) connector.
+————————————————+
|MIC IN (XLR) |
| |
+————————————————+
1.
Set Player Setup Repeat of the R-05 to ON , and the volume level to
maximum.
2.
Connect the R-05 to the MIC INPUT (XLR) connector and play
KY004_MIC.WAV .
Or, connect the oscillator to the
INPUT
connector of the DI-1, and connect
the
BALANCE OUT
connector of the DI-1 to the
MIC INPUT
(XLR)
connector of the JD-XA, and output the signal like the one shown below
from the oscillator.
1-kHz sine wave at 11±1.5 mVpp
3.
Adjust the LEVEL knob of the MIC INPUT connector to maximum.
4.
Connect the oscilloscope to the OUTPUT L/MONO and R jacks, and verify
that signals like the ones shown below are output.
L/MONO (Tip): 1-kHz sine wave at 10.0±2.0 Vpp
R (Tip): 1-kHz sine wave at 10.0±2.0 Vpp
* When verifying the signal of the
OUTPUT L/MONO
jack, connect a plug also to
the
OUTPUT R
jack.
fig.test-14.eps
5.
Disconnect the cable connected to the MIC INPUT (XLR) connector.
Execution automatically advances to the next test item.
15. MIC DC
This verifies the voltage of the phantom-power at the
MIC INPUT
connector.
+————————————————+
|MIC DC |
|Press [ENTER] |
+————————————————+
1.
Press ENTER .
2.
Using a tester, verify that the voltages of the
MIC INPUT
connector are as
follows.
Between pins 1 and 2: 48±2V
Between pins 1 and 3: 48±2V
fig.test-XLR.eps
3.
Press to advance to the next test item.
16. MIC IN (TRS)
This verifies the operation of the MIC INPUT (TRS) connector.
+————————————————+
|MIC IN (TRS) |
| |
+————————————————+
1.
Set Player Setup Repeat of the R-05 to ON , and the volume level to
maximum.
2.
Connect the R-05 to the MIC INPUT (TRS) connector and play
KY004_MIC.WAV .
Or, connect the oscillator to the
INPUT
connector of the DI-1, and connect
the
BALANCE OUT
connector of the DI-1 to the
MIC INPUT
(TRS)
connector of the JD-XA, and output the signal like the one shown below
from the oscillator.
1-kHz sine wave at 11±1.5 mVpp
3.
Adjust the LEVEL knob of the MIC INPUT connector to maximum.
4.
Verify that signals like the ones shown below are output from the
OUTPUT L/MONO and R jacks.
L/MONO (Tip): 1-kHz sine wave at 10.0±2.0 Vpp
R (Tip): 1-kHz sine wave at 10.0±2.0 Vpp
* When verifying the signal of the
OUTPUT L/MONO
jack, connect a plug also to
the
OUTPUT R
jack.
fig.test-14.eps
5.
Turn the LEVEL knob to maximum, then minimum, then maximum, and
verify that the wave form changes smoothly.
6.
Disconnect the cable connected to the MIC INPUT (TRS) connector.
Execution automatically advances to the next test item.
3:COLD
2:HOT
1:GND