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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
Step 5. Remove the A23 Test Set Motherboard
For instructions, click the Chapter 7 bookmark "Removing and Replacing the
A23 Test Set Motherboard" in the PDF Service Guide
Step 6. Remove the A24 IF Multiplexer Board
For instructions, click the Chapter 7 bookmark "Removing and Replacing the
A24 IF Multiplexer Board" in the PDF Service Guide
Step 7. Remove Some Cables
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.
When removing a cable, also remove the plastic cable clamp, if present. It
is normal for some of the cable clamp's adhesive to remain.
1. Place the analyzer bottom-side up on a flat surface.
2. Remove and discard the following gray flexible cables:
3. Remove all bottom-side (test set) semi-rigid cables except for those in the
Installation Note N5245-90121
— W130 A20 IF multiplexer (P203) to A12 SPAM (J5)
— W129 A20 IF multiplexer (P603) to A12 SPAM (J2)
following table. Do not discard the cables that are removed because some
will be reused later in the procedure.
To see an image showing the location of cables W11, W13, W17, and W51
click the Chapter 6 bookmark "Top Cables, All Cables - All Options" in the
1
PDF Service Guide
. To see an image showing the location of the other
cables, click the Chapter 6 bookmark "Bottom RF Cables, 2-Port, Option
222" in the PDF Service Guide
1. See
"Downloading the Online PNA Service Guide" on page
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