Keysight N5241BU-622, Installation Note, Page: 14 / 42

Installation Note N5242-90123 14
Installation Procedure for the Upgrade
Step 4. Remove the Front Panel Assembly
For instructions, click the Chapter 7 bookmark “Removing and Replacing the Front Panel
Assembly” in the PDF Service Guide
1
.
Step 5. Remove the A19 Test Set Motherboard
For instructions, click the Chapter 7 bookmark “Removing and Replacing the A19 Test Set
Motherboard” in the PDF Service Guide
1
.
Step 6. Remove the A20 IF Multiplexer Board
For instructions, click the Chapter 7 bookmark “Removing and Replacing the A20 IF Multiplexer
Board” in the PDF Service Guide
1
.
Step 7. Remove Some Cables
1. Place the analyzer bottom-side up on a flat surface.
2. Remove and discard the following gray flexible cables:
— W150 A20 IF multiplexer (P203) to A12 SPAM (J5)
— W149 A20 IF multiplexer (P603) to A12 SPAM (J2)
3. Remove all bottom-side (test set) semirigid cables except for those in the table below. To see
an image showing the location of these cables, click the Chapter 6 bookmark “Bottom RF
Cables, 2-Port, Option 222” in the PDF Service Guide
1
. Do not discard the cables because
some will be reused later in the procedure.
Be careful not to damage the center pins of the semi-rigid cables. Some
flexing of the cables may be necessary but do not over-bend them.
Leave the gray flexible cables, the wire harnesses, and the ribbon cables
connected where possible. Any that are removed should be labeled for
reconnection later.
Reference
Designator
Type
a
Qty Description
W3 SR 1 A5 source 1 to W4
W9 SR 1 A5 source 1 to W10
W45 SR 1 A5 source 1 to W46
W46 SR 1 W46 to rear-panel EXT TSET DRIVE RF OUT (J6)
W47 SR 1 A23 mixer brick to EXT TSET DRIVE LO OUT (J5)
Option 029 only:
W131
SR 1 Adapter, coax, straight, m-m, 50 ohm