Power Supply Unit - Toshiba e-STUDIO 2555C Service Manual

3.19 Power Supply Unit

3.19.1 General description
The power supply unit consists of AC filters and insulation-type DC output circuits in order to supply
stable DC and AC voltage to each electric part of this equipment.
3.19.2 Functions
The power supply unit consists of the AC filter, insulation type DC output circuits and IH coil control
circuit.
1. AC filter
Eliminates noise from the outside and prevents the noise generated by the equipment from leaking
to the outside.
2. DC output circuits
Converts AC voltage input from outside to DC voltage and supplies it to each electric part. The DC
voltage is divided into the following two lines.
a. Main power switch line:
Power supply used in the entire equipment during image forming process. Two kinds of voltage
(+5VS and +12 VA) are output when the main power switch of the equipment is turned ON.
b. Cover switch line:
Power supply used in the entire equipment during image forming process, being supplied via the
cover switch. The voltage (+24 VD) is output only when the main power switch of the equipment is
turned ON and two covers (front cover and automatic duplexing unit) are closed.
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