Yamaha YDO-323 Service Manual page 30

YDP-323
No. Key
17 C#4 SW check
18 D4 Lighting of all panel LEDs
26 D#4 Pedal 1 check
(Soft pedal)
27 E4 Pedal 2 check
(Sostenuto pedal)
28 F4 Pedal 3 check
(Damper pedal)
31 F#4 MIDI check
35 G4 Keyboard check by types
41 G#4 Master ROM check 2
42 A4 Slave ROM check 2
43 A#4 RAM check 2
30
Test item
Press switches one at a time in the order as in Table 2 (p.31). The sine wave sounds at the
scale corresponding to each switch being pressed (Refer to Table 2 in p.31.). Also, when
there is an LED corresponding to that switch, the LED lights up while the switch is
pressed.
Check that all switches are pressed correctly, resulting in OK.
Pressing a switch other than specified ones results in NG.
When the pressed switch is not detected even though it is actually pressed, no sound is
produced and the test results in NG.
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
All LEDs should light up.
The sine wave of C3 sounds when the test is started and the sine wave of C4 sounds when
the pedal is depressed.
When the pedal is released, the sound of the C4 sine wave stops and the test result is OK.
For the NG test result, the sine wave sounds continuously (until any key is pressed).
The sine wave of C3 sounds when the test is started and the sine wave of C4 sounds when
the pedal is depressed.
When the pedal is released, the sounding of the C4 sine wave stops and the test result is
OK.
For the NG test result, the sine wave sounds continuously (until any key is pressed).
The sine wave of C3 sounds when the test is started and the sine wave of C4 sounds when
the pedal is depressed.
When the pedal is released, the sound of the C4 sine wave stops and the test result is OK.
For the NG test result, the sine wave sounds continuously (until any key is pressed).
Connect the [MIDI IN] jack and [MIDI OUT] jack with the MIDI cable and execute the
test.
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
This test is executed as a factory test.
To check the ROM checksum connected to the CPU bus (Full address)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
It takes 10 seconds before checking is completed.
To check the ROM checksum connected to the CPU bus (Full address)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
It takes 13 seconds before checking is completed.
To check RAM connected to the CPU bus (Full address)
For the OK test result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
As execution of this test causes the entire data on RAM to be rewritten, it is necessary to
execute initialization after this test.
Test function and judgment criteria