Boss RC-30, Заметки по обслуживанию

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18
Mar. 2011 RC-30
14.
Disconnect the plugs from the
INST IN L
and
R
jacks.
15.
Input the following signal to
AUX IN
.
200-Hz rectangular wave at 250 mVp-p (L and R)
16.
Verify the waveforms on channel 1 and channel 2. Also verify that the
peak value is at
550 to 650 mVp-p .
fig.audio-9.eps
17.
Depress the left pedal to advance to the next test item.
9. AD Path Test (A3)
1.
Verify that A3 is shown on the 7-segment LED display.
2.
Input the following signal to AUX IN .
200-Hz rectangular wave at 250 mVp-p (L and R)
Testing is executed automatically, and if no problem is found, execution
automatically advances to the next test item.
* If the input level (250 mVp-p) is not precise, execution does not advance to the
next test.
10. DA Residual-noise Test (A4)
1.
Verify that A4 is shown on the 7-segment LED display.
2.
Connect the 47-k
Ω
dummy plugs to the INST IN L and R jacks.
3.
Adjust the MIC INPUT LEVEL control to the minimum setting.
4.
Verify that residual noise at OUTPUT L and OUTPUT R is at the
following value.
Not more than
-90 dBm
(JIS A) or not more than
-86 dBm
(DIN audio)
5.
Depress the left pedal to advance to the next test item.
11. AD Noise and Shock-noise Test (A5)
1.
Verify that A5 is shown on the 7-segment LED display.
2.
Verify that residual noise at OUTPUT L and OUTPUT R is at the
following value.
Not more than
-45 dBm
(JIS A) or not more than
-42 dBm
(DIN audio)
* The value is raised by +40 dB internally by the DSP.
3.
Connect a CM-30 or a monitor amplifier to OUTPUT L and OUTPUT R ,
and verify that no hum or shock noise is produced.
4.
Depress the left pedal to advance to the next test item.
12. Factory Reset
1.
Verify that
FA
is shown on the 7-segment LED display, and that the
RHYTHM ON/OFF
LED is flashing.
2.
Press
RHYTHM ON/OFF
.
The factory reset is executed, and when it finishes, the message Et
appears on the 7-segment LED display.
3.
Disconnect the plug from the OUTPUT L/MONO jack.
The power is switched off and the unit exits the Test Mode.
13. Battery Detection Circuit Test
1.
Connect the stabilized power supply (5.8 V) to the DC jack.
* Alternatively, connect a battery set at 5.8 V to the battery snap. When doing
this, connect nothing to the DC jack.
2.
Insert a plug into the
OUTPUT L/MONO
jack.
The power comes on.
3.
Verify that the message bt is displayed on the 7-segment LED display.
4.
Disconnect the plug from the OUTPUT L/MONO jack.
The power is switched off.
14. Battery Operation Test
* This test is not required if a battery was used in the test in the previous section.
1.
Insert batteries into the battery case.
* Never connect batteries lower than 5.8 V.
2.
Insert a plug into the
OUTPUT L/MONO
jack, and verify that the unit
starts without problem.
3.
Disconnect the plug from the
OUTPUT L/MONO
jack.
The power is switched off.