Fax725M/590Dt/590Mc/825Mc/875Mc; 1 ] Primary Function Group - Brother FAX100 Service Manual

3.2.2

FAX725M/590DT/590MC/825MC/875MC

[ 1 ] Primary function group

Main PCB Circuit Diagram 1/5
1 FAX engine (ASIC) which integrates a CPU and gate array.
2 Clock for CPU
3 Clock for calendar clock
4 ROM (2-megabit. Note that the sample machines for demonstration have a 4-
megabit ROM.)
2
5 E PROM (16-kilobit in the FAX725M/590DT/590MC/825MC, 32-kilobit in the
FAX875MC)
6 Control panel connector
7 LED array light intensity control circuit and connector
8 Recording head drive voltage detector
III – 16