Service manual

Section - VI Reading Station BT3000 PLUS Rev. 0, Soft Ver. 8 Page 8 of 12
6-5. ELECTRONICS FOR THE READING STATION SYSTEM
The entire electronics of the reading station, excluding the photometer, is
integrated in two boards located on the rear of its PVC panel: the Master Power
Board (15-04209-01) and the Master Logic Board (15-04211-01). See Figure 6-6.
6-6. MASTER LOGIC BOARD (15-04211-01).
This board (Figure 6-6) can be considered the heart of the electronic system. This
board accommodates the master microprocessor with a high capacity RAM and
EPROM. The bootstrap of the process program for all of the satellite
microcontrollers is executed in this RAM. This software is resident in the hard disk
and can be modified if needed. Another µC764 is resident on this board and,
together with µP552, processes an analog digital signal. Observing the schematic
carefully, the µC552 utilizes the UART for communicating with the IBM through
the MAX232 (U7) via the RS232.
READING STATION - REAR VIEW
Figure 6-6
MEMBRANE PUMP
FOR THE WATER
SUPPLY TO WATER
RESERVOIR
MASTER LOGIC
BOARD
15-04211-01
MASTER POWER
BOARD
15-04209-01
LINEAR STEPPING
MOTOR OF THE
DILUTER
LINEAR
ACTUATOR OF
THE WASHER