Fluke 8508A, Руководство по обслуживанию

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Maintenance
Access Procedures
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4-7
Removing the A3 Ohms PCA
Use the following procedure to remove the A3 Ohms PCA. See Figure 4-4.
1.
Position the unit on the work surface so it is bottom-side up.
2. Remove both rear feet.
A
a. Remove the three hex screws from each foot.
b. If the feet are still in place, pull them from the unit.
3. Remove the bottom cover.
B
a. Remove the one philips screw at rear of the bottom cover.
b. Slide the cover toward the back of the unit, and lift it off.
4. Locate the two connectors on the A1 DC PCA with the green, red, orange, yellow
and the black, brown wires.
5. Disconnect both connectors from the A1 DC PCA. These cables are hardwired to the
A3 Ohms PCA and must be disconnected before the A3 Ohms PCA can be removed.
6. Position the unit on the work surface so it is top-side up.
7. Remove the top shield.
C
a. Remove the four philips screws from the shield.
b. Slide the shield toward front of unit, and lift it out.
8. Remove the A3 Ohms PCA.
D
a. Disconnect the two connectors from the rear edge of the A3 Ohms PCA.
b. Remove the one philips screws from the A3 Ohms PCA.
c. Slide the A3 Ohms PCA toward the rear of the unit (about ¼ inch).
d. Lift the A3 Ohms PCA, and free the two hardwired cables before removing it
from the unit.
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3
4
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Figure 4-4. Removing the A3 Ohms PCA