Yamaha YPT-370 Manuel d'entretien - Page 27

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No.
Test Program Item
035
Main Volume Check
036
Fail-Safe Check
037
Pedal1 Check
048
Volt Check
052
Pos Check
059
ROM Check2
060
RAM Check2
061
Flash ROM Check2
Procedure for "Selection and execution of test items"
Checks the minimum value and maximum value of the [MAIN VOLUME].
1)
Press the [START/STOP] button. "MVol Min" is shown on the LCD.
Set the [MAIN VOLUME] to the minimum. "MVol Max" is shown on the LCD.
2)
3)
Set the [MAIN VOLUME] to the maximum. If no problem is found, "MVol OK"
is shown on the LCD.
Checks whether the fail-safe circuit for digital volume control works properly.
1)
Check the test result.
If no problem is found, "FS OK" is displayed.
If any problem is found, "FS NG" is shown on the LCD.
Checks whether the Foot switch plugged into the [SUSTAIN] jack works properly.
1)
Press the [START/STOP] button to produce the C3 sound.
2)
Press the Foot switch to produce the C4 sound.
3)
Release the Foot switch to stop the C4 sound.
If no problem is found, "PD1 OK" is shown on the LCD.
* Connect a Foot switch to the [SUSTAIN] jack before turning the power ON.
Confirms the voltage of the AC adaptor.
1)
Check the test result.
If no problem is found, "Volt OK" is shown on the LCD.
If a problem is found, "Volt NG" is shown on the LCD.
Checks the Make Position for the keyboard (PingPongPang mode).
1)
Press the [START/STOP] button. "Press" is shown on the LCD.
2)
Press the key on the keyboard.
3)
"xxx Make 1" → "xxx Make 12" (note number and make number) are shown
on the LCD. 0 and +4 notes are output with a velocity of 127 for every 2 Makes.
For example, if pressing the C key on the keyboard, CE is output.
4)
Press the [START/STOP] button to return to selection display of the test items.
Executes the check of the ROM connected to the CPU bus (Full address).
1)
Check the test result. (It will take about 50 seconds for the check.)
If no problem is found, "Rom OK" is shown on the LCD.
If any problem is found, "Rom NG" is shown on the LCD.
Executes the check of the RAM connected to the CPU bus (Full address).
1)
Check the test result.
If no problem is found, "Ram OK" is shown on the LCD.
If any problem is found, "Ram NG" is shown on the LCD.
Executes the check of the flash ROM connected to the CPU bus (Full address).
1)
Check the test result. (It will take about 40 seconds for the check.)
If no problem is found, "FRom OK" is shown on the LCD.
If any problem is found, "FRom NG" is shown on the LCD.
PSR-E373/YPT-370
27