Power Supplies - Keysight 33210A Service Manual

5
Chapter 5 Block Diagram

Power Supplies

Power Supplies
The line input voltage is filtered and applied to the main power supply.
The main power supply provides all power to the instrument. Secondary
power supplies are contained on the main circuit board. The secondary
power supplies include both isolated and earth-referenced supplies.
Line
110-240 Vac
Filter
Power
Switch
Display Backlight
Front Panel
100
+12V
PWR_ON
Main Supply
K1201
CCFL_ON
+15V
Isolated
+5V
Power
+3.3V_ISO
Supplies
+1.8V_ISO
–5V
–15V
+3.3V_ER
Earth
+1.8V_ER
Referenced
Power
Supplies
FAN
A1 Power Supplies