20 Installation Note N5227-90118
Installation Procedure for the Upgrade
-
2.
Remove the following semi-rigid cable, but keep it for re-installation later.
To see an image showing the location of the cable, click the Chapter 6
bookmark “Bottom RF Cables, Standard 2-Port Configuration, Option
419
(
S/N Prefixes
<
6021)
” or
“Bottom RF Cables, 4-Port, Option 419 (
S/N
Prefixes
≥
6021)
” in the PDF Service Guide
.
These cables may be discarded - they will not be reinstalled.
—
W38 (N5247-20007) A34 port 3 coupler to front-panel port 3 CPLR
ARM
—
W111 (N5247-20021) Port 4 CPLR THRU to A44 port 4 bias tee
—
W112 (N5247-20029) A44 port 4 bias tee to A35 port 4 coupler
—
W115 (N5247-20027) Front-panel port 2 CPLR THRU to A45 port 2
bias tee
3. 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.
Step 7. 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
1
.
1. See