Yamaha PSR-S770 Service Manual page 48

PSR-S770/PSR-S970
LCD■display
068 : NAND ROM Check2
(PSR-S970 only)
069■:■RAM■Check2
070 : Backup ROM Check2 Executes the complete check of the Backup ROM. (It will take about 1 minute 30 seconds.)
071■:■Wave■ROM■Check2
072 : Wave RAM Check2
073■:■Effect■RAM■Check2
074■:■Panel■PCB■Check■1
075■:■Panel■PCB■Check■2
48
Executes the complete check of the NAND ROM. (It will take about 5 minutes.)
1) Press the [START/STOP] button to start the test.
OK: OK
NG:■NAND■ROM■(IC
＊＊＊
2) Confirm that "OK" is shown on the LCD.
3) Press the [START/STOP] button to exit the TEST item.
Executes the complete check of the RAM.
1) Press the [START/STOP] button to start the test.
OK: OK
NG: MAIN■SDRAM■(IC
2) Confirm that "OK" is shown on the LCD.
3) Press the [START/STOP] button to exit the TEST item.
1) Press the [START/STOP] button to start the test.
OK: OK
NG: BACKUP■(IC
＊＊＊
2) Confirm that "OK" is shown on the LCD.
3) Press the [START/STOP] button to exit the TEST item.
NOTE: The power must not be turned off while testing, because the original data will be re-written at
the end of this test.
Executes the complete check of the Wave ROM. (It will take about 1 minutes 30 seconds.)
1) Press the [START/STOP] button to start the test.
OK: OK
NG: Wave■TG■(IC
＊＊＊,＊＊＊
2) Confirm that "OK" is shown on the LCD.
3) Press the [START/STOP] button to exit the TEST item.
Executes the complete check of the Wave RAM. (It will take about 20 seconds.)
1) Press the [START/STOP] button to start the test.
OK: OK
NG: Wave■RAM■(IC
＊＊＊
2) Confirm that "OK" is shown on the LCD.
3) Press the [START/STOP] button to exit the TEST item.
Executes the complete check of the Effect RAM . (It will take about 30 seconds.)
1) Press the [START/STOP] button to start the test.
OK: OK
NG: Effect■1■TG1■(IC
＊＊＊
2) Confirm that "OK" is shown on the LCD.
3) Press the [START/STOP] button to exit the TEST item.
This test is for the PNC, PNL, and PNR circuit boards only to check whether each panel button with its
LED (if available) works properly or not.
Refer to the "031: SW, LED Check" for details as the operation is similar.
Regarding what note and LED are assigned, refer to the Panel PCB division check 1 on page 52.
This test is for the PNM and PNS circuit boards only to check whether each panel button with its LED (if
available) works properly or not.
Refer to the "031: SW, LED Check" for details as the operation is similar.
Regarding what note and LED are assigned, refer to the Panel PCB division check 2 on page 53.
Test■items■and■judging■conditions
) NG■
) NG
＊＊＊,＊＊＊
) NG
) NG
) NG
)■NG