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March 2005 © TOSHIBA TEC e-STUDIO520/600/720/850 POWER SUPPLY UNIT
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17. POWER SUPPLY UNIT
17.1 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 leak-
ing 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 switch line: Power supply used in the entire equipment during image forming pro-
cess. Three kinds of voltage (+3.3 V, +5.1 V and +12 V) are output
when the main switch of the equipment is turned ON.
b. Cover switch line: Power supply used in the entire equipment during image forming pro-
cess, being supplied via the cover switch. Three kinds of voltage (+5.1
V, +24 V and +36 V) are output only when the main switch of the equip-
ment is turned ON and the cover interlock switch is turned ON (front
cover (lower) and left lower cover are closed).
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