Yamaha PSR-S750 Service Manual page 72

PSR-S750/PSR-S950
A
Is user drive partially
damaged?
No
Has Factory
Set been executed?
No
Checking and initializing
backup data.
Has clearing registration
or
Factory Set been executed?
No
Checking and initializing
registration data.
Has user drive been
formatted?
Yes
2nd opening screen
displayed.
72
For example, power
turned off while writing
Yes
Improper power shut
down! Backup data and/or
Userfiles have been lost.
User drive repaired.
If failed to reach here, possible
cause may be in;
Yes
Force Format Mode
Initializing backup data.
If failed to reach here, possible
cause may be in;
Yes
Initializing regist
backup.
Initializing registration data.
If failed to reach here, possible
cause may be in;
No
Formatting user drive.
Animation to
2nd screen
Yes
Has Factory Reset
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;
Panel LED lit
and
main screen displayed.
No
Err Detect check
Is Mute function normal?
Yes
Error Detect pulse output.
Assert file written.
Main Routine
As per headphone
condition and function
setting.
Internal harware error!
END
Sound can be output
from keyboard.