Low-voltage power supply
The low-voltage power supply (LVPS) converts AC power into the DC voltage for the product
mechanical assemblies. The following figure shows the system block diagram of the low-voltage
power supply.
The product uses three DC voltages: 24V, 5V, and 3.3V. See
Table 1-11 Low-voltage power supply
voltages description on page 16.
Figure 1-4 Low-voltage power supply block diagram
AC input
Fuser control
FUSE
(FU11)
FUSE
Noise
filter
Rectifying
circuit
+24V generation
circuit
+5V generation
circuit
+3.3V generation
circuit
Protection
circuit
Protection
circuit
Zerocross
circuit
Fuser
Connector
PCA
+24VA
+24VB
+5VR
+5VF
+5V_OFF
+5VA
+3.3VR
PSACV
/ZEROX
/PSAVE
/PSRL
+24VA
+5VB
+5V generation circuit
DC controller
+24VBS
+24VB
Interlock SW
SW101
Interlock SW
SW102
Load SW
Load SW
Relay
Triac
Low-voltage power supply
Rectifying
circuit
+3.3VA
ENWW Engine-control system 15
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