Contents

Surface Mount Repair

2-38

 

 

Disassembly and Reassembly Specifics 2-38

After Service Considerations

2-39

 

Product Safety Checks

2-39

 

 

Product Performance Checks

2-39

Assembly Identification and Location

2-40

Troubleshooting the Counter 2-45

 

Power Supply Check 2-45

 

 

 

Overview of the Self-Test Routines

 

2-47

Diagnosing the Faulty Assembly by Using the

Self Tests 2-49

 

 

 

To Run the Test-All Self Test

2-49

To Run the Individual Self Tests

2-50

3 Replacing Assemblies

Introduction

3-2

 

 

 

Tools Required 3-3

 

 

 

Do This First

3-3

 

 

 

To Remove the Cover

3-4

 

 

To Remove the Front Bezel

3-6

 

To Remove A1 Motherboard Assembly 3-9

 

To Remove the A2 Display Board, Keypads,

 

and Window

3-11

 

 

 

To Remove A3 1.5/3.0/5.0/12.4 GHz Channel Assembly

(Option 015/030/050/124)

3-13

 

To Remove A4 AC Power Supply Assembly

3-15

To Remove A5 DC Power Input Assembly

 

(Option 002)

3-17

 

 

 

To Remove A6 High Stability Timebase Assembly

(Options 001, 010, and 012)

3-19

 

To Remove the Rear Terminals (Option 060)

3-21

Assembly-Level Service Guide

ix

Page 11
Image 11
HP 181A manual Replacing Assemblies