Specifications

2.1 Print Engine Control
2.1.3 Low-voltage Power Supply Assembly
Figure 2–4 shows the circuits of the low-voltage power supply assembly
(LVPSA). If a short circuit or other fault draws excessive current from the
+24VA or +5V regulators, the output voltage decreases to a minimal level. To
reset the regulator, power the printer off and then on again.
The circuit breaker reset button is accessible through a hole on the side of the
LVPSA. The circuit breaker opens when a short circuit occurs in the LVPSA.
A shorted power regulator output should not trip the circuit breaker.
Note: A 6.3 amp fuse is used in place of the circuit breaker of power supplies
that carry the Sanken label.
When the top door is closed, the top door switch provides the +24VB to the
motors and high-voltage supplies.
Section 2.1.4 describes the operation of the fusing heater control circuit and
the , , and signals.
Figure 2–4 LVPSA Diagram
DC Control Board
Top Door
Switch
Exit Sensor
Main
Motor
Motor
Feed Unit
Controller
Board

HVPSA
Scanner
Motor
BD
Detector
Laser
Scanner Assembly
Fusing
Unit
+24VA +5V
+5V
+24VB +5V
+24VB
+5V +5V
+24VA
+5V
+5V DC Power
Regulator
+24VA DC Power
Regulator
Circuit
Breaker
Noise
Filter
Fusing
Heater
Control
J103-1
-2
-3 -4 -5 -6
J212-1 -2 -3
-1
-2
J104F-3
FSRD
RLD
THOUT
DSG-000596
Video
Control
Board
2–8 Technical Description