Getting Started
If You Have a Problem
If HP 4155A/4156A cannot be powered on
Check that the power cable is rmly connected to HP 4155A/4156A and to
power outlet.
Check that the front-panel LINE switch is on.
Check that the voltage selector switch is set properly.
The voltage selector switch is located in the lower-right corner of the rear
panel. The following table shows the line voltage selector setting.
Line Voltage Position
84-124 Vac left
200-248 Vac right
Check that the fuse is good.
The fuse holders located in the lower-right corner of the rear panel.
1. Turn the HP 4155A/4156A o and disconnect the power cable from the
power outlet.
2. Unscrew the fuse holder on the rear panel.
3. Inspect that the correct fuse is installed, and wire inside the fuse is
not
broken by using a rester.
Line Fuse Type HP Part Number
110/120 Vac Time-delay type 8A, 250 Vac 2110-0383
220/240 Vac Time-delay type 4A, 250 Vac 2110-0014
4. Replace the fuse, if necessary. Then, screw in the fuse holder.
5. Turn the HP 4155A/4156A on.
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