HP 8560E Service Manual page 207

Assembly Replacement
Procedure 13. Rear Frame/Rear Dress Panel
7. Connect a high-voltage probe (1000:1), such as the HP 34111A to a
voltmeter with a 10 megohm input.
8. Connect the clip lead of the probe (ground) to the chassis of the
spectrum analyzer.
9. Slip the tip of the high-voltage probe under the A6A1W3
post-accelerator cable's rubber shroud to obtain a reading on the
voltmeter. See Figure
10.Keep the high-voltage probe on the post-accelerator connector until
the voltage has dropped to a voltmeter reading of less than 5 mV
(less than 5 V at the connector). This normally takes about 30
seconds.
11.Disconnect the line-power cord from the spectrum analyzer.
12.Using a small screwdriver with the shank in contact with the CRT
shield assembly, slip the tip of the screwdriver under the A6A1W3
post-accelerator cable's rubber shroud and short the cable to ground
on the CRT shield assembly. See
13.Remove the three screws securing the power-supply shield to the
power supply, and remove the shield. See (1) in
14.Disconnect the fan and line-power cables from A6J3 and A6J101 on
the A6 power supply assembly.
15.Remove the two flathead screws that secure the rear-panel battery
assembly, and remove the assembly. Remove the battery and
unsolder the two wires attached to the battery assembly.
16.Use a 9/16-inch nut driver to remove the dress nuts holding the BNC
connectors to the rear frame. If necessary, drill out the nut driver to
fit over the BNC connectors, and cover it with heatshrink tubing or
tape to avoid scratching the dress panel.
17.Remove four screws that secure the rear frame to the main deck. See
(1) in Figure 3-29.
18.Remove the six screws that secure the rear frame to the left and
right side frames.
19.Remove the knurled nut that secures the earphone jack. Carefully
remove the jack using caution to avoid losing the lock washer located
on the inside of the rear-frame assembly. Replace the washer and
nut onto the jack for safekeeping.
20.Remove the rear-frame assembly.
21.To remove the rear dress panel, remove the two nuts located on the
inside of the rear frame near the display adjustment holes.
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3-3.
Figure 3-3.
Figure 3-30.
Chapter 3