Essilor Instruments APH 550

32
5-19 LED for lighting eyeball does not light up
Main causes when LED for lighting eyeball does not light up:
・ Failure of harness of LED for lighting eyeball
・ Failure of LED board assy for lighting right (left) eyeball or control board assy
・ Failure of motor control board assy or right (left) side motor drive board assy
【A. In case that one LED does not light up.】
The LED for lighting the
eyeball does not light up.
YES
NO
OK
Replace the motor control board assy.
Is the harness of the LED for
lighting the eyeball normal?
NO
Interchange between the LED board assy for lighting the right eyeball
and the LED board assy for lighting the left eyeball and connect them.
Replace the harness of the
LED for lighting the eyeball.
Does the LED for lighting
the eyeball right up?
YES
Does the LED for lighting
the eyeball light up?
YES
NO
Replace the LED board assy
for lighting the eyeball.
Does the LED for lighting
the eyeball light up?
NO
YES
Is "PD LED Error" displayed?
Replace the control board assy.
YES
NO
Does the LED for lighting
the eyeball light up?
YES
NO
YES
Does the LED for lighting light up?
NO
Replace the right (left)
motor control boar assy.