Keysight Technologies N5244/5B Service Manual page 10

Contents
Top Hardware and Miscellaneous Parts, All Options . . . . . . . . . . . . . . . . . . . . . . . . . . 6-293
Bottom Hardware and Miscellaneous Parts . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-295
Internal Hardware and Miscellaneous Parts, All Options . . . . . . . . . . . . . . . . . . . . . . . 6-299
External Hardware and Miscellaneous Parts, All Options . . . . . . . . . . . . . . . . . . . . . . 6-301
Miscellaneous Part Numbers . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 6-303
7. Repair and Replacement Procedures
Information in This Chapter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Chapter Seven at-a-Glance . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-2
Personal Safety Warnings . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-3
Electrostatic Discharge (ESD) Protection . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-4
Removal and Replacement Procedures . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-5
Removing the Covers. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-8
Removing and Replacing the Front Panel Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-10
Removing and Replacing the A1–A3 and Other Front Panel Subassemblies . . . . . . . . . . . 7-12
Removing and Replacing the A4–A17 Boards
(For analyzers with serial numbers prefixed MY/SG/US5150 and below) . . . . . . . . . . . . . . 7-20
Removing and Replacing the A4–A17 Boards
(For analyzers with serial numbers prefixed MY/SG/US5201 and above) . . . . . . . . . . . . . . 7-24
Removing and Replacing the A18 System Motherboard . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-27
Removing and Replacing the A19 Midplane Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-30
Removing and Replacing the A20 Power Supply Assembly. . . . . . . . . . . . . . . . . . . . . . . . . 7-32
Removing and Replacing the A21 CPU Board Assembly . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-34
Removing and Replacing the A22 GPIB Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-36
Removing and Replacing the A23 Test Set Motherboard. . . . . . . . . . . . . . . . . . . . . . . . . . . 7-38
Removing and Replacing the A24 IF Multiplexer Board . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-41
Removing and Replacing the A25 HMA26.5. . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-43
Verify the Model/Version of HMA26.5 Installed . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-45
Removing and Replacing the A26 Splitter . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-46
Removing and Replacing the A27 and A28 Mixer Bricks . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-48
Removing and Replacing the A29–A32 Reference Couplers and Reference Coupler Mounting
Brackets . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-51
Removing and Replacing the A33–A36 Test Port Couplers . . . . . . . . . . . . . . . . . . . . . . . . . 7-53
Removing and Replacing the A37 Reference Mixer Switch . . . . . . . . . . . . . . . . . . . . . . . . . 7-55
Removing and Replacing the A38–A41 Source Attenuators and the A46–A49 Receiver
Attenuators . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-57
Removing and Replacing the A42–A45 Bias Tees . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 7-59
Removing and Replacing the A50–A53 Bypass Switches and the A54 Combiner . . . . . . . 7-61
Removing and Replacing the A55 Solid State Drive (SSD) . . . . . . . . . . . . . . . . . . . . . . . . . 7-64
10 Keysight N5244B/45B Service Guide