Yamaha X94 Series, Service Manual

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Diagnosis function (LCD type display unit)
a. “16” is displayed in the diagnosis mode dis-
play 1 of the display unit.
b. Press the function select switch “
s
” of the
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 “ ” of the display
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.
3) Error displays
or
a. “18” is displayed in the diagnosis mode dis-
play 1 of the display unit.
b. Press the function select switch “
s
”
2
of
the display unit.
c. All segments of the display unit
3
will illumi-
nate.
d. Replace the display unit if there are seg-
ments which are not illuminated.
e. Press the light switch “ ”
4
of the display
unit.
f. The power to the display unit is turned off.
4) Display unit function check
4
2
3