Agilent Technologies Infinium DCA 86100A Service Manual page 116

Instrument Modifications
Replacing A7A2, A8, or A9 Assemblies
6 Place the instrument in its normal operating position with the front extended five or six inches
over the edge of the bench. Reach up and turn the calibration access plug until it becomes loose
(a tab on the plug lines up with a notch in the cover). Gravity will help you to remove the plug.
7 From the rear panel, place your hands on each side of the cover, and use your thumbs to push the
instrument out the front of the cover.
N O T E For the following steps, refer to
8 Locate W33 that connects the A18 ATX Interface Assembly to the A4 PC Motherboard.
9 Carefully remove the cable ties.
10 Disconnect W33 from the A18 ATX Power Supply Interface assembly.
11 Disconnect the other end of W33 from the A4 PC Motherboard
12 Disconnect W1 Touch Screen Controller Power from the A8 Touch Screen Controller Interface
assembly.
13 Remove the W1/W33 cable assembly from the chassis and discard.
N O T E Be careful when removing the W1 cable as it is part of the W33 that plugs into the A18 ATX
assembly.
14 Disconnect W2 Touch Screen Controller Serial Data from the A8 Touch Screen Controller
Interface assembly.
15 Disconnect the other end of the W2 Cable from the A4 PC Motherboard, remembering where the
serial connection is on the motherboard.
16 Remove the W2 cable from the chassis and discard.
17 Disconnect W6 Touch Screen Controller Cable from the A8 Touch Screen Controller assembly
18 Disconnect the other end of W6 from the A7A2 Touch Screen Controller assembly.
19 Remove cable W6 from the chassis and discard.
20 Using a small Torx driver, unscrew the fasteners that hold the A8 assembly to the chassis and
discard.
N O T E Use a short handled T8 or T10 Torx driver to loosen the screws. A right angled T10 Torx would
be best.
21 Remove the A8 Touch Screen Controller assembly and discard.
22 Using the supplied screws, attach the new Touch Screen Controller bracket to the chassis as
shown in
6-6
Figure 6-5 on page 6-7
Figure 6-6 on page 6-8. Use a T10 Torx with a 5 inch-pounds torque wrench.
for cable and assembly locations.