Service manual

Ultraview 1030/1050 Monitors — Service Manual
3-12
Power Supply System
Figure 3-6: Power supply block diagram
Battery(s) Input/Output
power supply / battery
input
comparator
linear
regulator
+12 V
battery
charging
LED
flasher
over
current
protection
shutdown
power fail
FET
recorder
power
+20 V
+12 V
-12 V
-5 V
+5 V
+3.3 V
+15 V
digital
pot
input
to
Digital
Section of CPU
to
Digital
Section of CPU
to
Digital
Section of CPU
to
RCPU
PCBA
to
IRTS
PCBA
LED
Main input
voltage from
battery or the
AC/DC power
linear 5 V
20 V
charger pre-
regulator
power
converter
+5 V,+3.3 V
power
converter
slow
turn
ON
front
panel
switch
analog
on/off
switch
slow
turn-on
AC/DC
power supply
Input
A B
battery fault
charger CPU
&
power converter
battery chargers
feedback
A-to-D
converter
to CPU
±12V,-5V
supply