31
DGX-220/YPG-225
Test Descriptions, Judgment Criteria
LCD Display
TEST No.
*
Note: As for the test no.41 - 45, it takes time. If you want to skip them, press the [+/YES] button several times to go to the
test no.47 (Factory).
37
41
42
45
47
48
--
037 MIDI Chk
041 Rom Chk2
042 Ram Chk2
045 FRomChk2
047 Factory
048 TestExit
--
Connect a PC which has installed the driver and main unit USB terminal with a USB cable.
Set the through mode on PC and execute the test.
Confirm that the C4 note is output and "MIDI OK" is displayed on LCD.
Checks the ROM that is connected to the CPU.
The test result appears on the LCD. Check that the LCD displays "Rom OK".
It takes about 15 seconds.
(OK:"Rom OK", NG:"Rom NG")
Check the RAM that is connected to the CPU.
The test results appear on the LCD. Check that the LCD displays "Ram OK".
(OK:"Ram OK", NG:"Ram NG")
Checks the flash ROM that is connected to CPU bus.
The check result appears on the LCD. Check that the LCD displays "FRom OK".
It takes about 30 seconds.
(OK:"FRom OK", NG:"FRom NG")
All backup domains are initialized and it changes into a factory-shipments state when executing
this test.
(While executing the test: "Fact --", After finishing the test: "Fact End)
Exit from the test program after executing this test.
Noise Level Check (in the normal mode) (33 ohm load)
Connect the level meter(with a JIS-C filter) to the [PHONES/OUTPUT] jack. (L and R)
Set the [MASTER VOLUME] at maximum and check that the noise level is within the range
below.
PHONES L/R: less than -78.0 dBu
