Power Supply Pcb - Brother MFC7050C Service Manual

3.5

Power Supply PCB

The power supply uses the switching regulator to generate DC power (+30V and +5V) from a
commercial AC power line. Both the +30V and +5V DC supplies are fed via the interface PCB to
the main PCB.
The +30V source is stabilized and fed to the scanner motor (for advancing documents), paper feed
motor (for feeding documents and recording paper), carrier transport motor (for moving the
carrier), thermal ink-jet print heads, and LED array of the CIS unit.
The +5V source is stabilized and fed to the ASIC, Centronics interface circuit, memories, and
video IC.
Power Supply Circuit
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