HP LaserJet Pro 500 - Engine-control system

Engine-control system
The engine-control system receives commands from the formatter and interacts with the other main
systems to coordinate all product functions. The engine-control system consists of the following
components:
●
DC controller
●
High-voltage power supply
●
Low-voltage power supply
Figure 1-2 Engine-control system
+3.3VA
Protection circuit
24VRMT
Low-voltage power supply
AC input
Noise filter
Fuse
DC controller
Fusing control
circuit
+24V
generation
circuit
+24VA
+5VA
SW2
+5VC
SW1
+24VB
SW3
Protection circuit
/ZEROX
PSTYP100
+3.3VC
Rectifying
circuit
Rectifying
circuit
+5V
generation
circuit
+3.3V
generation
circuit
Fuse
PWRSWON
VC5VOFF
Formatter
ICB
+5VD
+5VB
+3.3VB
+3.3VA
+5VB
VC3VOFF
PWRSAVE
Noise filter
+24VB
Switch
Switch
Switch
Switch
Switch
Zero crossing
circuit
Power switch
ENWW
Engine-control system
7
draft version