TM 11-6625-3053-14
ITEM
MALFUNCTION
CHECKS/CORRECTIVE ACTION
5
No POWER MONITOR METER indication after waiting for delay ckt to operate and then switching to
CW.
1. Check the -325V beam supply per Alinement step 1.
a) If between -310V and -340V, proceed to check 2 below.
b) If between -270V and -315V, aline to -325V per Alinement step 1.
If you cannot aline to -325V, go to T/S item 7.
c) If no voltage measured, go to T/S item 7.
2. Check the -750V repeller supply per Alinement step 2.
a) If between -740V and -760V, proceed to check 3 below.
b) If between -650V and -740V, aline to -750V per Alinement step 2.
If you cannot aline to -750V, go to T/S item 6.
c) If no voltage measured go to T/S item 6. If already done in
check, 1 above, eliminate this check.
3. Check repeller voltage:
a) Using multimeter set to 1000 VDC range, set the test probes
between -325V test point and the REPELLER test point on the
tracking board. Refer to Figure 6-11. Repeller Voltage vs
Vary the frequency control from 800 MHz to 2400 MHz. Observe
the variations of voltage on the multimeter, and record the
voltages at 800 MHz and at every 2CO MHz thereafter.
b) If the voltages are within the shaded area of Figure 6-11, go to
step 4 below.
c) If the voltage is continuous but lower or higher than those shown
in Figure 6-11, aline the tracking board pots per Alinement step 5.
d) If the voltage is very irregular, with points of no voltage as you
6-52