Power Supply Unit; Construction - Toshiba e-STUDIO2500c Service Manual

17. POWER SUPPLY UNIT

17.1 Construction

The power supply unit consists of the AC filter, insulation type DC output circuits and heater lamp con-
trol 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 switch line:
b. Cover switch line: Power supply used in the entire equipment during image forming process,
3) Heater lamp control circuit
TRC (Triac) is driven by the heater control signal (BHCON, BHSON, PHON) from the LGC board
and then AC power is supplied to each heater lamp (center heater lamp, side heater lamp, pressure
roller lamp) in the fuser unit.
May 2006 © TOSHIBA TEC
Power supply used in the entire equipment during image forming process.
Three kinds of voltage (+3.3 V, +5.1 V and +12V) are output when the
main switch of the equipment is turned ON.
being supplied via the cover switch. Two kinds of voltage (+5.1VD and
+24VD) are output only when the main switch of the equipment is turned
ON and two covers (front cover and automatic duplexing unit) are closed.
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e-STUDIO2500c/3500c/3510c POWER SUPPLY UNIT
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