TM 11-6625-3053-14
ITEM
MALFUNCTION
CHECKS/CORRECTIVE ACTION
e) If you get a reading of approx -9 dBm reattach P1 to J1 and go to
check 7 below.
f)
If you get less power than -12 dBm replace A5 assembly.
g) Recheck for the approx -9 dBm output at J1.
7. Check cable from P2 to Detector.
a) Detach cable from J1 going into the detector junction.
b) Attach adapter, type N female to type N female.
c) As in check 6d above, and under the same conditions, check
power on ext power meter at this point.
d) Power should still read same as in check 6d above.
e) If it does, reattach the detector and go to check 8 below.
f)
If it doesn't, replace cable connecting J1 to the detector.
8. Check meter circuit.
a) Position A3 card to vertical position.
b) Using multimeter, set to VDC. Measure voltage to bottom of R8
of the A3 assy (pin 2 of P3). Voltage should be .017 VDC.
If voltage is obtained, replace M1.
If voltage not obtained, go to check c) below.
c)
Continuing with multimeter, measure voltage between ground
Voltage should be approx -12 VDC.
If voltage obtained, replace AR5.
If voltage not obtained, check power input to A3 card assy per
T/S item 12, check 1 e) 2).
6
Cannot aline -750V supply-incorrect voltage.
1. Check -325V output of A2A3 card assy.
a) Remove instrument dust cover if on.
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