Keysight Technologies 33210A - Page 110

5Block Diagram
110 Keysight 33210A Service Guide
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.
110-240 Vac
Line
Filter
Main Supply
Power
Switch
K1201
Earth
Referenced
Power
Supplies
Isolated
Power
Supplies
+3.3V_ER
+1.8V_ER
+15V
–15V
+5V
–5V
+3.3V_ISO
+12V
PWR_ON
+1.8V_ISO
FAN
Display Backlight
CCFL_ON
(from U101)
A1 Power SuppliesFront Panel