Toshiba e-STUDIO556 Service Manual page 154

Multifunctional digital systems

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3.19 Power Supply Unit

Construction

The power supply unit consists of the AC filter and insulation type DC output 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 circuit

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.

b. Cover switch line:

e-STUDIO556/656/756/856/557/657/757/857

OUTLINE OF THE MACHINE

Three kinds of voltage (+3.3 V, +5.1 V and +12 V) are output when the

main power switch of the equipment is turned ON.

Power supply used in the entire equipment during image forming process,

being supplied via the cover switch. Three kinds of voltage (+5.1 V, +24 V

and +36 V) are output only when the main power switch of the equipment

is turned ON and the cover interlock switch is turned ON (front cover

(lower) and left lower cover are closed).