1.3.14 Power Supply - Brother mfc8440 Service Manual

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1.3.14 Power supply

+5V is generated by the 3-pin regulator from astable 7V supplied from the LVPS. +5V is used

for the IEEE1284 interface, the LD PCB and the engine PCB. In addition, +1.9V is generated

by the 3-pin regulator from 3.3V supplied from the LVPS. +1.9V is used for the CPU within the

ASIC and the logic circuit.

NJU7223DL1-19

Q6 NJM2391DL1-19

MFC-8440/8840D/8840DN, DCP-8040/8045D/8045DN

SERVICE MANUAL

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Mfc8840d Dcp8045d Dcp8045dn Mfc8840dn Dcp8040