HP Color LaserJet Professional CP5220 Service Manual - Page 30
Low-voltage power supply, The low-voltage power supply LVPS converts AC input voltage to DC voltage.
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Low-voltage power supply The low-voltage power supply (LVPS) converts AC input voltage to DC voltage. Figure 1-8 Low-voltage power supply Low-voltage power supply Power switch SW1 Formatter FU101 Noise filter Rectifying circuit +3.3V generation circuit Remote switch control circuit +3.3V FU102 RL102 RL103 Noise filter Fuser heater control circuit RL101 Protection circuit +24V generation circuit +5V generation circuit Zerocross circuit +5V PWRON SWON/OFF +3.3V +24V RLD2 RLD1 REMOTEON ZEROX Fuser +24R +5R DC controller SW2 +24V Interlock switch SW4 SW3 +5V Interlock switch The product uses three DC voltages: 24V, 5V, and 3.3V. The voltages are subdivided as follows: +24V +24R Supplied constantly Stopped during Sleep mode Interrupted when the front or right door is opened 18 Chapter 1 Theory of operation ENWW