Essilor Instruments APH 550

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5-1 General description of boards
This product is composed with the peripheral devices, mainly such as 5 control boards, LED and
sensor etc.
The micro controller is mounted on 5 control boards below and they work with the instruction
from the control board.
When the red LED on the communication board is lighted, it is in the process of the program
rewriting of the control board.
The functions of the main boards are shown below.
1.
Control board assy
: LCD control, touch panel control
2.
Operation board assy
: Operation switch control, power indicator control
3.
Printer control board assy
: Printing of the printer, feeding paper control, cutter control
4.
Motor control board assy
: Motor control and LED control in the main unit, infrared
communication control
5.
Communication board assy
: Communication control with an autoref, lensmeter and PC