Yamaha YDP-131 Service Manual page 35

No. Key Test item
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
45 B4 Flash ROM check 2
47 C5 Factory Set
Test function and judgment criteria
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 11 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.
To check erase, write, read functions for all banks of Flash ROM
* Note that execution of this test causes all data in Flash ROM to be erased.
(a) Erase function check
Perform the erasing procedure to the entire Flash ROM and check if it is successful.
(b) Write function check
To check the full address checksum of Flash ROM
* Be careful not to turn off the power during the write function check.
(c) Final erasure
To erase the data written during (b) Write function check.
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 25 seconds before checking is completed.
Initialize all the backup areas so as to obtain the factory outgoing setting state. (RAM
and Flash)
* Note that all the data will be erased.
For the OK result, the sine wave of C4 sounds (for 1 second).
For NG, the sine wave of C2 sounds (continuously until any key is pressed).
* In this stage, the flag for initialization is raised only and initialization will be executed
when the power is turned on next time. After executing this factory setting, be sure to
execute Test No. 48 "Test Exit". Initialization of the memory is actually executed when
the program is restarted (RE BOOT). Once it is started, do not turn off the power until
LED flashing comes to an end.
It takes 5 seconds before checking is completed.
YDP-131/YDP-131C
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