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9. Connect the jumper wire from chassis ground to the black wire coming from the AlAll
High-Voltage Multiplier at the wire's connection to AlA3Tl.
10. Remove aII jumper wires. The AlVl CRT, the AlA High-Voltage Regulator, and the
11. Remove the bottom cover of the IF-Display section by loosening the screw 0 shown in
Figure 1. Discharge the four large AlAlO Motherboard capacitors by shorting the 2
screws, holding each capacitor to the motherboard, together.
12. Turn the instrument upside down as shown in Figure 3. Disconnect wire @ ACC and wire
from the AlAlO Motherboard.
13. Turn the instrument over as shown in Figure 4. Remove wires @)@ from the neck of the
CRT, noting the location of connections for the installation of new CRT.
14. It is necessary to remove the front panel to remove the CRT from the instrument. Refer
to the Front Panel Removal and Repair procedure in the AlAl Front Panel Assembly tab.
15. Loosen the two screws a@ in the CRT clamp a@. It is not necessary to remove these
screws; the CRT can be removed if they have been loosened. To gain access to the clamp
screw adjacent to the cover @@, it is necessary to remove the cover by removing the
screws (iJ@.The CRT is now loose.
Figure 3. CRT Replacement, Bottom View,
(Serial Number Prefixes: 2403A-3001A)
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