Outguard Power Supply Assembly Removal/Installation Procedures - Agilent Technologies 3458A Repair Manual

Outguard Power
Supply Assembly
Removal/Installation
Procedures
Removal Procedure
52 Chapter 3 Disassembly/Assembly Procedures and Parts List
The following procedures show how to remove and install the Outguard
Power Supply Printed Circuit Board Assembly.
Refer to Figure 20 for the following procedures.
1. Use the Covers Removal Procedure in this section of the manual to
remove the 3458A bottom cover. It is not necessary to remove the top
cover and the top/bottom shields.
2. Set the 3458A on your workbench with the top facing you.
3. Pull the power switch pushrod off the ac power switch. You may need
to pry the pushrod loose with a small screwdriver. Then remove the
pushrod by pulling it out of the front panel from the rear.
4. Locate the grey 20-pin cable that connects the Outguard Power Supply
assembly to the Main Controller assembly. Unplug this cable at the
Outguard Power Supply assembly.
5. Locate the grey 26-pin cable that connects the Outguard Power Supply
assembly to the Display assembly. Unplug this cable at the Outguard
Power Supply assembly.
6. Locate the 8-pin cable that connects the Outguard Power Supply
assembly to the power transformer. Unplug the cable from the power
supply assembly. Move the cable so it lays on the outside of the
outguard chassis.