Disassembly/Assembly Procedures and Parts List 3
Keysight 3458A Assembly-Level Repair Manual 91
7 Unplug the 4-pin cable from socket P301. This cable is connected to the Ext
Out and Ext Trig connectors on the rear panel. Move the cable out of the way.
8 Unplug the 2-pin cable from socket P3. This cable is connected to the fan.
Move the cable out of the way.
9 Unplug the two black striped white wires from the AC power filter on the rear
panel. Move the wires out of the way.
10 Unplug both sets (four cables) of the blue and gray fiber optic cables from the
Outguard Power Supply Assembly. These cables connect the A/D Converter
and Inguard Logic assembly to the Outguard Power Supply assembly. Move
the cables out of the way.
11 Use the #TX10 Torx driver to remove the two screws on the power supply
regulator heat sink.
12 Use the #TX10 Torx driver to remove the two screws on the Outguard Power
Supply assembly.
13 Push the Outguard Power Supply board toward the front of the instrument, as
far it will go. Then lift it up and away from the instrument.
Installation procedure
1 Line up the slots on the Outguard Power Supply board with the sheet metal
hook tabs on the chassis. Make sure the board is as far as possible toward the
front of the instrument.
2 Place the board on top of the chassis. Then push it all the way to the rear of the
instrument.
3 Use the #TX10 Torx driver to install the two screws on the power supply
regulator heat sink.
4 Use the #TX10 Torx driver to install the two screws on the Outguard Power
Supply assembly.
5 Plug in both sets of the blue and gray fiber optic cables into the corresponding
sockets on the Outguard Power Supply assembly.
6 Locate the two black striped white wires. Connect the wire from “LINE” to the
left terminal (as seen from the instrument's front) of the filter. Connect the
“NEUTRAL” to the right terminal on the filter. These connections are also
shown on a drawing on the Outguard Power Supply assembly. The drawing is
located toward the rear of the board near ac line select switches.
To Next Page
Loading...
