Yamaha YPT-370 Руководство по эксплуатации - Страница 26
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No.
Test Program Item
019
MUTE Check
021
HP Insertion and
Extraction Check
022
AUX Check
024
Switch Check
032
All LCD On Check
033
All LCD Off Check
26
Procedure for "Selection and execution of test items"
Confirms that the output MUTE function works properly.
1)
Press the [START/STOP] button. "MUTE Off" is shown on the LCD and the C5
sound is produced.
Press the [+] or [-] button. "MUTE On" is shown on the LCD and the sound
stops.
2)
Press the [START/STOP] button to return to selection display of the test items. If
a sound was being produced, the sound stops.
* This procedure can be performed to confirm that the MUTE function works properly.
Checks whether the PHONES jack works properly.
1)
Press the [START/STOP] button. "HP In" is shown on the LCD.
2)
Connect headphones to the [PHONES/OUTPUT] jack. "HP Out" is shown on the
LCD.
3)
Remove the headphones from the [PHONES/OUTPUT] jack. If there are no
problems, "HP OK" is shown on the LCD.
Checks whether the sound is input to the [AUX IN] jack properly.
1)
Check whether "AUX In" is shown on the LCD when no plug is plugged into the
[AUX-IN] jack.
2)
Connect an oscillator to the [AUX IN] jack.
"AUX Out" is shown on the LCD when an stereo mini plug cable is plugged into
the [AUX IN] jack properly.
3)
Connect the level meter to the [PHONES/OUTPUT] jack on the rear panel. (Both
L and R ch, 33 Ω load)
4)
Input the sine wave (-6 dBu, 1 kHz) to the R ch of the [AUX IN] jack.
5)
Check the output levels of L and R ch indicated on the Level meter.
No problem if the following conditions are satisfied.
[PHONES/OUTPUT] (33 Ω load)
• R (input side): –4.8 dBu ± 2 dBu
• L (nothing side): –70.0 dBu or less
6)
For the L ch, make the same operations as in Steps 4 to 5.
7)
Unplug the stereo mini cable from the [AUX IN] jack.
If no problem is found, "AUX End" is shown on the LCD.
Checks whether each panel button works properly.
1)
Check that the LCD shows you the should-be-pressed button.
2)
Press the button specified on the LCD one by one.
The sound of the note assigned to the pressed button will be produced. (Regarding
what note is assigned, refer to the "Switch Test Item List ")
* You can exit from this test by pressing the [DEMO] button.
* If any problem is found, "SW NG" is shown on the LCD.
* If two or more buttons are pressed simultaneously, "Over Two" is shown on
theLCD.
If no problem is found, "SW OK" is shown on the LCD.
Checks whether all the LCD dots are turned on properly.
1)
Check that all the LCD dots are turned on.
Checks whether all the LCD dots are turned off properly.
1)
Check that all the LCD dots are turned off.