Xerox WorkCentre Pro 412, Service Manual

Page: 62 / 192

Circuit Description
WorkCentre Pro 412
Launch Issue
5-36
August 2001
A R3 limits AC current and controls upper and lower REN meter.
5-8 SMPS (Switching Mode Power Supply) Unit.
5-8-1 SMPS Specifications
There are no user-serviceable parts inside the SMPS unit.
The SMPS (Switching Mode Power Supply) unit used here is a PWM (Pulse Width Modulation) type power
supply unit that supplies DC+5V to controller and control panel, and DC+5V, DC+24V and DC+12V to the
engine. It also supplies AC power to fixer heat lamp.
No
.
Output Channel Ch.1 Ch.2 Ch.3
1
Channel name +5.1V +24.0V +12.0V
2
Rated output voltage +5.1V +24.0V +12.0V
3
Rate output current 2A 2.5A 1.0A
4
Maximum load current
and
load pattern 3A continuous 3.5A continuous 1.0A continuous
5
Load change range 0.5~2.0A 0.3~2.5A 0.2~1.0A
6
Rate output voltage
(For rated I/O) +5.1V±5%
(+4.84 to +5.35V) +24.0V±10%
(+21.60 to
+26.40V) +12V±5%
(+11.40 to
+12.60V)
7
1) Total output voltage
deviation
(Input, load, temp.,
aging)
2) Dynamic input
change
3) Dynamic load
change Including all
+5.1V±5%
(+4.84 to +5.35V)
including set error Including all
+24.0V±10%
(+21.60 to
+26.40V)
including set
error Including all
+12V±5%
(+11.40 to
+12.60V)
including set
error
8
Refer to ripple & noise
27) 150mVp-p or less 500mVp-p or
less 150mVp-p or less