HP M750 series

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