Yamaha YSP-1 Service Manual page 22

YSP-1
• Display provided when DIAG started
When the monitor is connected, DIAGNOSTIC MENU
appears on its screen as shown in the figure. (It remains
on display until DIAG is cancelled.)
The FL display of the main unit displays the protection
function history data and the version (1 alphabet) and the
DIAG menu [sub-menu (THR ALL) of DIAG menu No.1
DSP THROUGH] a few seconds later.
When there is no history of protection function:
When there is a history of protection function:
Cause: The voltage in the power supply section is
abnormal.
Supplementary information: The abnormal voltage is
displayed in % based on 3.3V as 100%.
Turning on the power without correcting the abnormality
will cause the protection function to work 1 second later
and the power supply will be shut off.
22
Opening message
When there is no history
of protection function
Version (1 alphabet)
After a few seconds
When there is a history of protection
function due to abnormal voltage in
the power supply section
Voltage display in %
DIAG menu display
Version (1 alphabet)