TABLE 4-2. TROUBLESHOOTING CHART (Continued)
step
Symptom
Probable cause
Corrective Action
(9) Modes do not track
3
(9) Diagnose only. Return to depot for
repair.
(cont'd)
(10) Diagnose only. Return to depot for
(10) Defective tracking potentiometer
repair.
1A7R1
(11 ) Diagnose only. Return to depot for
(11 ) RF attenuator probe 1W15 defective
repair.
(12) Defective klystron 1V1
(12) Diagnose only. Return to depot for
repair.
(13) Delay circuit inoperative (Voltage
measured between 1A4TP3 and
ground does not go to O volts after
60 seconds)
(14) Amplifier circuits inoperative
(15) Switch 1A3S1 defective
(16) No +40 V supply voltage for the
(16) See Step 8
amplifier circuit. (Measure voltage
between pins 3 and 4 of connector
1A3J3 with pin 4 as negative)
b. Defective metering circuit
(1) Defective detector 1Z1
(1) Diagnose only. Return to depot for
repair.
(2) Replace 1A8 (see paragraph 44M.)
(2) Defective power monitor meter 1A8M1
(3) Defective probe 1W9. (Measure 50
(3) Diagnose only. Return to depot for
repair
ohms between ground and canter
conductor of probe connector 1W9P7)