page 11
Service manual Easyfield
6.2.3
Board description
6.2.4
EF01 board
The internal functions of the measuring
device are controlled by a PIC
Microcontroller. It controls perimetric
measurement, data transmission and
measuring procedure. Because of the
individual brightness of the testpoint LEDs
on the LED board (cf. 6.2.6, page 13) the
unit has to be calibrated. The calibration
values are stored on the EF01 boards
Eeprom.
Caution: If the EF01 board has to be
replaced it is not enough to change the
eeprom to get the correct calibration data.
The device has to be completely
recalibrated
.
Figure 13
To LED board
right connector
To LED board
left connector
To CCD board
To CCD board
Eeprom
containing the
calibration data
