Getting Started 1
E364xA User’s and Service Guide 31
Connecting power to the power supply
If the power supply does not turn on
Use the following steps to help solve problems you might encounter when turning
on the instrument. If you need more help, refer to Chapter 8, “Service and
Maintenance” for instructions on returning the instrument to Keysight for service.
1 Verify that there is AC power to the power supply
First, verify that the power cord is firmly plugged into the power receptacle on
the rear panel of the power supply. You should also make sure that the power
source you plugged the power supply into is energized. Then, verify that the
power supply is turned on.
2 Verify the power- line voltage setting.
The line voltage is set to the proper value for your country when the power
supply is shipped from the factory. Change the voltage setting if it is not
correct. The settings are 100 Vac, 115 Vac, or 230 Vac.
3 Verify that the correct power- line fuse is installed.
The correct fuse is installed for your country when the power supply is shipped
from the factory. Refer to Table 1-3 to replace the fuse for your power supply.
Table 1-3 E364xA power-line fuse
Model Keysight part number Part description
E3646A
E3647A
2110-1550 Fuse 2.5 A T 125 V for 100 Vac and 115 Vac
2110-1346 Fuse 1 A T 250 V for 230 Vac
E3648A
E3649A
2110-0996 Fuse 4 A T 250 V for 100 Vac and 115 Vac
2110-1548 Fuse 2 A T 250 V for 230 Vac
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