Yamaha DGX-220 Service Manual page 31
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Also See for DGX-220:
- Owner's manual (118 pages) ,
- Service manual (52 pages) ,
- Manuale di istruzioni (118 pages)
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TEST No.
37
41
42
45
47
48
--
*
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).
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LCD Display
037 MIDI Chk
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.
041 Rom Chk2
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.
042 Ram Chk2
Check the RAM that is connected to the CPU.
The test results appear on the LCD. Check that the LCD displays "Ram OK".
045 FRomChk2
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.
047 Factory
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)
048 TestExit
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.
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Test Descriptions, Judgment Criteria
PHONES L/R: less than -78.0 dBu
DGX-220/YPG-225
(OK:"Rom OK", NG:"Rom NG")
(OK:"Ram OK", NG:"Ram NG")
(OK:"FRom OK", NG:"FRom NG")
31
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