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8842A
Instruction Manual
6-29. True RMS AC PCA Removal (Option -09 Only)
The True RMS AC PCA should be removed by reversing the last three steps in Figure
1.Release the True RMS AC PCA from the chassis by pulling the four plastic latches upward (Figure
2.Raise the True RMS AC PCA slightly, and disconnect the red lead from the connector (J301) located on the Main PCA (Figure
3.Disconnect the ribbon cable from the Main PCA by releasing the ribbon connector latches (push outward; see Figure
4.Lift the True RMS AC PCA out of the chassis.
6-30. IEEE-488 Interface PCA Removal (Option -05 Only)
The
1.Remove the two jack screws and washers from the rear panel
2.Release the
3.Raise the forward edge of the
4.Disconnect the ribbon cable from the
6-31. Main PCA Removal
1.Disconnect the leads from the four front panel input terminals and the four rear panel input terminals by unplugging them. (Refer to Figure
2.Remove the cable harness from the two cable clamps on the side of the instrument chassis. (Figure
3.Remove the front panel fuse by pressing in the lip of the 2A input terminal slightly and rotating it
4.(Disregard this step if the
5.Disconnect the two ribbon cables from the Display PCA by pulling the two plastic pull tabs directly outward from the Display PCA.
6.Remove the two mounting screws on either side of the rear panel power receptacle.
7.Disconnect the green power supply ground lead from the rear panel mounting stud. (The stud is located near the rear panel power receptacle. See Figure
8.Remove the Line Voltage Selection Switch (LINE SET) PCA as follows (Figure 6- 6G):
a.Remove the upper screw that holds the LINE SET PCA to the upper rear panel standoff.