Essilor Instruments APH 550, Maintenance Manual

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8 Replacement procedure of each unit
All maintenance operation most be done by technicians approve by Essilor instrument service
center.
8-1 Head
・
8-1-1
Removal of LD case assy, head rest, cover for hiding screw, head rest adjustment
knob assy and near point chart fixing knob assy
・
8-1-2
Replacement of motor control board assy, right side motor drive board assy, left side
motor drive board assy, motor drive unit harness and sensor harness for detecting
position
・
8-1-3
Replacement of infrared communication board assy, LED board assy for lighting
right side near point chart, LED board assy for lighting left side near point chart,
head unit peripheral harness and infrared harness
・
8-1-4
Replacement of VD-R assy, VD-L assy, LED board assy for lighting right eyeball,
LED board assy for lighting left eyeball, LED harness for lighting the eyeball and
sensor relay harness
・
8-1-5
Replacement of LD-R assy and LD-L assy
・
8-1-6
Replacement of PD assy
・
8-1-7
Replacement of joint block assy, leveling adjustment knob assy and chart stopper
・
8-1-8
Replacement of measuring window and VD check window
8-2 Controller
・
8-2-1
Replacement of LCD case 1 assy, LCD panel assy, control board assy, and leg of
controller
・
8-2-2
Replacement of LCD case 2, body case 1 and 2, open switch, printer case, printer
control board assy, relay board assy, thermal printer, printer cover, printer harness,
control printer harness, flame harness and printer flame harness
・
8-2-3
Replacement of operation dial assy, operation unit case assy, operation board assy
and operation harness
8-3 Relay box
・
8-3-1
Replacement of communication board assy, switching power supply assy, power
supply BKT, power supply case and harness
・
8-3-2
Replacement of power supply switch
・
8-3-3
Replacement of fuse
・
8-3-4
Replacement of leg of relay box