Instruction manual

Chapter 3 Replacing Assemblies
Introduction
3-2 Assembly-Level Service Guide
3
Introduction
This chapter contains the instructions for removing major assemblies in the
Agilent 53131A/132A/181A. To install an assembly, reverse the removal instructions.
This chapter provides the following disassembly and reassembly procedures:
WARNING HAZARDOUS VOLTAGES ARE ON THE POWER SUPPLY ASSEMBLY.
UNPLUG THE INSTRUMENT, THEN WAIT AT LEAST SIX MINUTES FOR
THE CAPACITORS ON THE POWER SUPPLY ASSEMBLY TO
DISCHARGE BEFORE WORKING ON THIS INSTRUMENT.
CAUTION Do not replace assemblies with the instrument turned on. Damage to components can
occur.
Refer to Chapter 5, “Replaceable Parts,” for the part number of the assemblies.
• To Remove the Cover page 3-4
• To Remove the Front Bezel page 3-6
• To Remove A1 Motherboard Assembly page 3-9
• To Remove the A2 Display Board, Keypads, and Window page 3-11
• To Remove A3 1.5/3.0/5.0/12.4 GHz Channel Assembly (Option
015/030/050/124)
page 3-13
• To Remove A4 AC Power Supply Assembly page 3-15
• To Remove A5 DC Power Input Assembly (Option 002) page 3-17
• To Remove A6 High Stability Timebase Assembly (Options 001,
010, and 012)
page 3-19
• To Remove the Rear Terminals (Option 060) page 3-21