Yamaha Arius YDP-161, Руководство по обслуживанию

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YDP-161/YDP-161C
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No. Key Item Test descriptions, judging conditions, etc.
19 F#4 RAM check 2
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).
20
G4 Flash ROM check 2 To check erase, write, read functions for erasable 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.
21
G#4 Wave ROM check 2 To check the ROM checksum connected to the bus of tone generator LSI (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.
22
A4 Effect RAM check 2 To check the full address checksum of Effect RAM.
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.
23
A#4 Factory Set 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
fl ag 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. 24 "Test Mode 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 fl ashing comes to an end.
24
C7 Test Mode Exit To end the test program and reset to the normal mode (for restarting).
Table 2 Switch test order
l
Inspections of the others
1. MASTER VOLUME
Usually, it judges by feeling inspection, and when there is a doubt, it judges in measured value.
The amount of change should be the following value.
Test program item: Output Level R Check/Output Level L Check
Maximum attenuation: Not less than 70 dBu
2. NOISE
When nothing is pronounced, L and R ch should become below the following value.
PHONES L, R: less than -90 dBu
Order Switch name LED to light up Note No.
1 DEMO/SONG C3
2 PIANO/VOICE D3
3 METRONOME E3
4 +/R +/R(Green) F3
5 –/L –/L(Green) G3
6 REC REC(Red) A3
7 PLAY PLAY(Green) B3