Test Program - Yamaha Portable Grand DGX-220 Service Manual

■ TEST PROGRAM

* If you execute the test No.47(Factory Set), then the user's preset data may be lost.
Therefore, back up the user's data in advance.
A. PREPARATION
1) PA-5D or PA-51(AC adaptor) is used.
2) Measuring instruments: frequency counter, level meter (with JIS-C filter)
Note: Connect a stereo plug to the [PHONES/OUTPUT] jack at 33 ohms.
3) Jigs: Foot switch (FC-4 or FC-5), USB cable, USB-MIDI driver(*1)
PC (Install a USB-MIDI driver(*1) in PC and finish the THROUGH setup.)
*1 Obtain the USB-MIDI driver from CD-ROM (X7225A00) for DGX-220/YPG-225 or Yamaha official website.
(URL>>http://www.yamahapkclub.com)
B. HOW TO ENTER THE TEST PROGRAM
While pressing the C2#, F2 and G2# keys, turn the [STANDBY/ON] switch on.
DGX-220/YPG-225
C. TEST PROCEDURE
1) When the test program is started, "TEST" will be displayed on the LCD.
2) Press the [-] or [+] button of the number buttons to select a test program item.
3) Press the [START/STOP] button to execute the test.
* If the test result is OK, or the test item is completed, press the [START/STOP] button again to return to the test item
selection display.
* Press the [-] or [+] button of the number buttons to select the next test program item.
* When the test result is OK, a carsor (_) is added under the first character of the test item name on display.
If the test result is NG, press the [DEMO] button or the lowest (leftmost) white key to return to the test item selection
display.
D. TEST PROGRAM LIST (dBu=dBm)
TEST No.
LCD Display
1 001Version
2 002Rom Chk1
3 003 Ram Chk1
C2# G2#
F2
Test Descriptions, Judgment Criteria
Displays versions.
This test program displays ROM(Program) and USB CPU versions.
(In case of OK: Prog "XXX",USB "XXX", NG: Prog "Err",USB "Err")
Checks the ROM that is connected to the CPU bus.
The test results appear on the LCD. Check that the LCD displays "Rom OK".
Checks the RAM that is connected to the CPU bus.
The test results appear on the LCD. Check that the LCD displays "Ram OK".
STANDBY
ON
DGX-220/YPG-225
(dBu=dBm)
(OK:"Rom OK", NG:"Rom NG")
(OK:"Ram OK", NG:"Ram NG")
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