Yamaha DTXTREME III, Руководство по обслуживанию

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DTXTREME Ⅲ
54
[Judgment indication]
In case of OK:
/ / / / DTXTREME III Test Program / / / /
26 : USB-ToHost : OK
In case of NG:
/ / / / DTXTREME III Test Program / / / /
26 : USB-ToHost : NG
[MIDI code output for judgment result]
OK: A0 1A 02
NG: A0 1A 03
[How to quit test]
MANUAL MODE:
In case of OK, press the [INC/YES] button to proceed to the
next test.
If the test is aborted with the judgment of NG, press the
[EXIT] button to return to the “Test number selection screen”.
MIDI MODE:
Send a test code for another test to stop the current test and
the test for the newly sent test code will be executed.
Press the [EXIT] button to return to the “MIDI test code
standby screen”.
27. OUTPUT-L
[Test Code]
A0 1B 00
[Initial indication]
/ / / / DTXTREME III Test Program / / / /
27 : OUTPUT-L : Press [ENTER]
[Test contents]
・
Check that speci fi ed signals are outputted from the [OUTPUT]
and [PHONES] jacks.
・
Check that signals are outputted from the [DIGITAL OUT]
jack.
[Test method]
Press the [ENTER/STORE] button to execute the test.
Set the sliders (slide volumes) [MASTER] and [PHONES] to
the MAX.
Insert standard phone plugs to both the [OUTPUT L/MONO]
and [OUTPUT R] jacks and measure frequency, waveform,
level and distortion of each output.
After the measurement, disconnect the plug connected to the
[OUTPUT R] jack and measure the output from the [OUTPUT
L/MONO] then.
Insert standard stereo plug to the [PHONES] jack and measure
frequency, waveform, level and distortion of each output.
Check also that sound is outputted from the [DIGITAL OUT] jack.
Do not insert a plug to the [AUX IN/SAMPLING IN] jack.
[Check item]
・
[OUTPUT L/MONO]: Frequency: 1 kHz±1.5 Hz
Waveform: Sine wave
Level: +4.0±2 dBu (load of 10 k Ω )
Distortion: 0.1% or less
・
[OUTPUT R]: Level: -87.0 dBu or less (load of 10 k Ω )
・
Operate the [MASTER] Slider to check that volume from the
[OUTPUT L/MONO] is changed smoothly.
・
[PHONES] Lch: Frequency: 1 kHz±1.5 kHz
Waveform: Sine wave
Level: -1.0±2 dBu (load of 33 Ω )
Distortion: 0.1 % or less
・
[PHONES] Rch: Level: -67 dBu or less (load of 33 Ω )
・
Operate the [PHONES] Slider to check that volume from the
[PHONES] Lch is changed smoothly.
・
[DIGITAL OUT]: Connect a powered monitor speaker
(S/P DIF) with digital input and play the sound.
Check that the sine wave is free from
distortion.
●
When a plug is not connected to the [OUTPUT R]
・
[OUTPUT L/MONO]: Frequency: 1 kHz±1.5 Hz
Waveform: Sine wave
Level: -2.0±2 dBu (load of 10 k Ω )
Distortion: 0.1% or less
[Judgment indication]
None
[MIDI code output for judgment result]
None