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Samsung Electronics
Service Manual
4.4 SMPS & HVPS
The SMPS and HVPS are on one integrated board.
The SMPS supplies the DC power to the system. It takes either 110V or 220V and outputs the +5V and 24V
supplies to the main and other PBAs.
The HVPS creates the high voltage of THV/MHV/Supply/Dev and supplies it to the toner cartridge. The CPU is
used to modify some of these voltage settings to provide the ideal voltages to create the image.
The HVPS part uses the 24V and outputs the high voltage for THV/MHV/BIAS and the outputted high voltage is
supplied to the toner, OPC cartridge and transfer roller.
MAIN PBA CON.
CN3
(FAN CON.)
CN1
(H/L CON.)
F101
250V L2A
EXIT SENSOR
CN4
(PANEL CON.)
MHV
OPC
DEV
SUPPLY
THV
COVER OPEN SWITCH
MANUAL SENSOR
FEED SENSOR
PAPER-EMPTY SENSOR
F1
110V : 125V/8A
220V : 250V T 5A H
F2
110V : 125V/3A
220V : 250V 2A H