Yamaha PSR-S750 Service Manual page 74

PSR-S750/PSR-S950
A
Test mode?
No
Data read from NAND (IC202)
Is user drive
partially damaged?
No
If failed to reach here, possible
cause may be in;
Has Factory Set
been executed?
No
Checking and initializing
backup data.
If failed to reach here, possible
cause may be in;
Has clearing registration
or
Factory Set been executed?
No
Checking and initializing
registration data.
If failed to reach here, possible
cause may be in;
Has user drive
been formatted?
Yes
74
Yes
Error Detect pulse output
(IC18,1)
Test mode displayed.
END
For example, power
turned off while writing.
Yes
Improper power shut
down! Backup data and/or
Userfiles have been lost.
User drive repaired.
Yes
Force Format Mode
Initializing backup data.
Yes
Initializing regist backup.
Initializing registration data.
No
Formatting user drive.
2nd opening
screen displayed.
Yes
Has Factory Set
been executed?
No
Owner name displayed.
Has clearing system backup
Yes
or
Factory Set been executed?
Initializing system setup.
No
Initializing system backup.
Reproducing system backup.
Mute cancelled.
SP OFF cancelled
(depending on function).
If failed to reach here, possible
cause may be in;
No
Has SSP2 been
activated?
Yes
Panel LED lit and
main screen displayed.
Err Detect check
No
Is Mute function normal?
Yes
Internal hardware error!
Error Detect pulse output.
Assert file written.
Main Routine
Animation to 2nd screen
As per headphone
condition and function
setting.
Device error! The pedal and
Vocal Harmony functions are
not effective
END
Sound can be output
from keyboard.