The meter needle is pointing below the 10 kV mark.
the power supply require readjusting?
Adjust 10 kV power supply PP-607/GPN on radar set AN/FPN-40.
a. Loosen the four knurled screws of the indicator, azimuth-elevation
range, IP-800/FPN-40, pull drawer forward to its mechanical stops, and pull
the interlock out to restore power to the chassis (Figure 27).
b. Observe the output meter.
c. Adjust R8010, 10 kV adjustment control, for a reading of 10 kV on
the output meter M-8001 (Figure 27).
You have completed the 10 kV power supply adjustment. In doing so you
have ensured that the proper anode and grid voltage is applied to the
cathode ray tube (CRT). Restore the radar set to its operating condition by
securing the indicator, azimuth-elevation range, IP-800/FPN-40.
Now, use this checklist
components and controls.
Control indicator group OA-2664/FPN-40 (Figure 3).
Indicator, azimuth-elevation range, IP-800/FPN-40 (Figure 26).
Knurled retaining screws (Figure 27).
Output adjustment control R8010 (Figure 27).
Power supply meter M-8001 (Figure 27).
Learning Event 4:
Learning Event 4 will enable you to locate and identify synchronizer-
controls which are part of the control indicator group OA-2664/FPN-40
generator, electronic marker SN-836/FPN-40 is performed to ensure proper
operating voltages are supplied to the SN-386/FPN-40 and IP-800/FPN-40.