Fluke NetDAQ 2640A, Service Manual

Page: 118 / 260

NetDAQ
Service Manual
3-12
Removing the A2 Display PCA 3-15.
To remove the A2 Display PCA [F], see the procedure “Disassembling the Front Panel
Assembly.”
Removing the A3 A/D Converter PCA 3-16.
Complete the following procedure to remove the A3 A/D Converter PCA [O] from the
chassis.
1. Complete the procedure “Removing the Instrument Case” to gain access to the
instrument assemblies. Verify the instrument is not powered from any ac or dc
source.
2. Disconnect the ribbon cable [J] at connector A3J10 that leads to the A1 Main PCA.
3. Remove the six screws [P] that secure the pca to the chassis.
4. Slide the pca towards the front of the instrument so that the pca edge indentations
match the guide tabs on each side of the chassis, tilt slightly upwards and remove.
(Be sure the Universal Input Module is not connected at the rear panel.)
Removing the A4 Analog Input PCA 3-17.
Complete the following procedure to remove the A4 Analog Input PCA from the
Universal Input Module.
1. Remove the Universal Input Module from the instrument. Open the module and
disconnect all inputs to the terminal strips.
2. Using a nonmetallic prying device, widen the side of the module next to one of the
securing tabs (located near the ends of the terminal strips), and pry one edge of the
pca free of the module. Lift the free edge of the pca upwards and remove from the
module.
Removing Miscellaneous Chassis Components 3-18.
Complete the following procedure to remove miscellaneous chassis components,
including the power switch/input connector, fuseholder, and power transformer.
Removing the Power Switch/Input Connector 3-19.
Complete the following procedure to remove the power switch/input connector [L].
1. Complete the procedure “Removing the Instrument Case” to gain access to the
instrument assemblies. Verify the instrument is not powered from any ac or dc
source.
2. Disconnect all five terminals [Q] from the power switch/input connector.
3. Compress the tab at one side of the power switch/input connector and partially
remove the switch from the chassis. Repeat for the other tab and remove the switch
from the chassis.