Essilor AKR 550 - Parts Identification

7. PARTS IDENTIFICATION
1. LCD monitor
2. Power indicator
3. Printer unit
4. Base unit
5. Slide lock
6. Operation switch
1. Headrest
2. Eye mark
3. Chinrest
4. Rating plate
5. Power inlet
6. Fuse holder
7. RS-232C terminal
8. Power switch
9. Measurement start switch
Applied parts are headrest and chinrest.
There is the parts list separated from this manual.
Also there is another parts list related to the safety.
AKR550 - Auto Kerato Refractometer > V8 - 12-2017
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USER MANUAL> IV. DEVICE