Fluke NetDAQ 2640A, Service Manual

Page: 121 / 260

General Maintenance
Assembly Procedures
3
3-15
Installing the A1 Main PCA 3-27.
Complete the following procedure to install the A1 Main PCA [I].
1. Tilt the rear portion of the pca slightly downwards and position the pca in the
chassis. Slide the pca towards the rear and into position.
2. Install the RS-232 connector hardware [N] at the rear panel using a 3/16-inch nut
driver.
3. Install the two screws [M] that secure the pca to the chassis.
WARNING
Make sure you correctly connect the switch and power
terminals at the power switch! There is a risk of electric
shock if the connection is incorrect. Refer to Figure 3-3
for the input power terminal connections.
4. Thread the two red wires through the pca and connect to the power switch. Either red
wire can be connected to either switch terminal. Do not accidentally connect the red
wires to any input power terminal! (If you removed the power input terminals,
reconnect them as shown in Figure 3-3.)
5. Reconnect the transformer cable at A1J3.
6. Route the pendant A/D ribbon cable [J] (from A1P10) through the chassis opening
and reconnect it to the A3 A/D Converter PCA connector A3J10.
7. Gently reconnect the display ribbon cable [E] to the connector A1J2.
8. Complete the procedure “Installing the Instrument Case,” as required.
Installing the A2 Display PCA 3-28.
To install the A2 Display PCA, see “Assembling the Front Panel Assembly.”
Installing the A3 A/D Converter PCA 3-29.
Complete the following procedure to install the A3 A/D Converter PCA [O].
1. Tilt the rear portion of the pca slightly downwards and position the pca in the
chassis. Slide the pca towards the rear and into position.
2. Install the six screws [P] that secure the pca to the chassis.
3. Reconnect the ribbon cable [J] at connector A3J10 that leads to A1P10 on the A1
Main PCA.
4. Complete the procedure “Installing the Instrument Case,” as required.
Installing the A4 Analog Input PCA 3-30.
Complete the following procedure to install the A4 Analog Input PCA.
1. Place the pca in position in the module.
2. Widen a side of the module next to one of the securing tabs (located near the ends of
the terminal strips), and press the pca firmly into place. Repeat for the other tab.
3. Reconnect the input measurement wires, as required.