Agilent Technologies 2948, 2712A manual Parts Location Shown with Power Supply Removed

Model 8904A Instrument Changes

Checking for the Shock Hazard

1.Unplug the power cord from its rear-panel socket.

2.Remove the instrument’s top cover by backing out the screw in the center of the rear edge of the cover. This is a captive screw and will cause the cover to push away from the frame.

3.Refer to figure 7-4.Locate the ground wire. It has green insulation with a yellow stripe and is inside the rear panel in the right rear corner of the instrument beneath the red and silver warning label.

4.Carefully slit the black shrink tubing over the ground wire connection to the line socket. A sharp X-acto knife is recommended. (The shrink tubing will not be replaced.)

5. Inspect the soldered wire connection on both ends of the ground wire and compare the wire wrapping to figure 7-5.One end of the wire goes to the chassis ground lug and the other end to the socket ground connection on the rear-panel line socket.

6.If the solder joints are properly wrapped and soldered, replace the top cover and make a quick check of the operation of the instrument.

\ /-WARNING LABEL

BLACK WIRE

GREENVELLOW GROUND WIRE

’/\MAIN HARNESS (GRAY)

Figure 7-4.Parts Location (Shown with Power Supply Removed)

rev.15DEC89 Firmware Updates/Hardware Modifications 7-11