Brother MFC-970MC, FAX-931, FAX-921 service manual Main PCB

3.2Main PCB

The main PCB, which is the nucleus controlling the entire operation of the equipment, consists of a FAX engine (ASIC), memories, motor drive circuitry, sensor detection circuitry, and analog circuits for scanning, recording, and power transmission shifting.

*Provided on the FAX870MC/FAX-930/FAX-931/MFC970MC.

EEPROM: Electrically Erasable Programmable Read-only Memory

DRAM: Dynamic Random Access Memory

Block Diagram of Main PCB

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