Keysight Technologies 8480 Series, Operating And Service Manual

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3 Service
72 Keysight 8480 Series Operating and Service Manual
1 Set the printed circuit board and connector into place as shown in , bottom
view.
2 Insert cap screws 8, 9, 11, 12, 14, and 15 but do not tighten.
3 Center the circuit board so there is equal air gap between each side and the
chassis. Tighten 8, 9, 14, and 15.
4 Insert screw 3, 4, and 5. Tighten only screw 5.
5 With small hole 5 to the left, carefully insert the gold leads on A1 bulkhead
assembly through the holes in the black plastic guide on A2 input amplifier.
6 Using tweezers, position the ends of the gold wires over the electrical pads.
7 Place and hold plastic clamp 16 over the gold wires. As you tighten the clamp
screw, watch the compression spring. Tighten the clamp screw 7 only until the
spring coils touch. Any further tightening could damage the FET circuit.
8 Place the upper chassis in position and insert cap screws 1, 2, 10, and 13.
9 Tighten 1, 2, 3, and 4.
10 Tighten 10, 11, 12, and 13.
11 Place the plastic shells, magnetic shields, and the chassis together as shown
in Figure 2-4 . Snap the plastic shells together.
CAUTION
DO NOT tighten clamp screw 6 excessively or the FET circuit may be broken.