Chapter 3 Replacing Assemblies
To Remove A1 Motherboard Assembly
Assembly-Level Service Guide
3-9
3
To Remove A1 Motherboard Assembly
1
Remove the cover.
See the section titled “To Remove the Cover” in this chapter.
2
Remove the Power Supply Assembly.
See the section titled “To Remove A4 AC Power Supply Assembly” in this
chapter.
3
Remove the front bezel.
See the section titled “To Remove the Front Bezel” in this chapter.
4
If the Counter contains Option 015/030/050/124 1.5/3.0/5.0/12.4 GHz
Channel, disconnect the optional channel’s flat-ribbon cable from
J7 on A1 Motherboard Assembly as shown in Figure 3-6.
5
If the Counter contains one of the optional high stability timebase
assemblies (Option 001, 010, 012), disconnect the flat-ribbon cable
from J6 of A1 Motherboard as shown in Figure 2-8A
(See Chapter 2, “Service.”).
6
If the Counter contains the Option 002 DC Power Input Assembly,
remove it.
See the section titled “To Remove A5 DC Power Input Assembly
(Option 002)” in this chapter.
7
Remove the two hex screws (H4), shown in Figure 3-6, on the
rear-panel HP-IB connector using the 7-mm spin tight.
Summary of Contents for 53131A
Page 1: ...Assembly Level Service Guide HP 53131A 132A 181A 225 MHz Counter ...
Page 2: ......
Page 14: ...Contents xii Assembly Level Service Guide ...
Page 22: ...Preface xx Assembly Level Service Guide ...
Page 23: ...1 Performance Tests Verifying Specifications ...
Page 97: ...2 Service ...
Page 149: ...3 Replacing Assemblies Disassembly and Reassembly ...
Page 173: ...4 Retrofitting Options ...
Page 191: ...5 Replaceable Parts ...
Page 201: ...6 Backdating Manual Changes ...
Page 218: ...Chapter 6 Backdating Backdating Specifications 6 18 Assembly Level Service Guide 6 ...
Page 219: ...7 HP 53131A 132A Specifications ...
Page 235: ...8 HP 53181A Specifications ...
Page 246: ...Chapter 8 HP 53181A Specifications General Information 8 12 Assembly Level Service Guide 8 ...
Page 252: ......
Page 254: ... Manual Part Number 53131 90039 Printed in U S A MARCH 1999 ...