Yamaha X94 Series Service Manual page 39

Diagnosis function (LED type display unit)
2
or
3
On On
1
2
1
2
2-25
3) Error displays
a. "16" is displayed in the diagnosis mode dis-
play 1 of the display unit.
b. Press the function select switch "
display unit.
c. When there is a malfunction, "E2" (motor) or
"E4" (controller) will be displayed on the
diagnosis data display 2 of the display unit.
TIP
Check the error code if "E2" or "E4" are dis-
played.
d. Press the light switch "
unit.
e. Proceed to 4) Display unit function check.
TIP
Check the error code if E2 or E4 are displayed.
• When there is no malfunction the next "18" is
displayed without the diagnosis mode "16"
being displayed.
• Perform a final check to make sure there is
no error display in this mode when perform-
ing repairs or replacing parts.
4) Display unit function check
a. "18" is displayed in the diagnosis mode dis-
play 1 of the display unit.
b. Press the function select switch "
the display unit.
c. All segments and all lamps of the display
unit will illuminate.
d. Replace the display unit if there are seg-
ments or lamps which are not illuminated.
e. Press the light switch "
unit.
f. The power to the display unit is turned off.
– +
ELEC
" of the
" of the display
" 2 of
" 3 of the display