TABLE 6-1. TROUBLESHOOTING CHART (cont)
Trouble
Probable Cause
Remedy
Faulty TRANS cable W2 (figure
Substitute cable W3. If trouble is
corrected, replace cable W2.
Perform power test of table 7-2,
No excitation voltage to
transmitter.
step 1, part II.
Faulty MODE SELECTOR switch
1S8 (15, figure 9-12).
Faulty quick connector (11,
Check quick connector for proper
cornnection and for broken wires.
Faulty angle indicator amplifier
Replace angle indicator amplifier.
1A7 (20, figure 9-7).
Faulty angle indicator 1A8 (36,
Replce angle indicator.
E1 voltage cannot be adjusted to
F lead to transmitter open.
Replace transmitter and check
null NULL INDICATOR with
inter connecting cables.
Turntable on headings of 0 and
180 degrees.
E1 power supply subassemblies
Perform E1 voltage range test of
shorted to chassis ground.
table 7-2, step 3.
Faulty El regulator amplifier
1A1 (18, figure 9-7, E1
gearcase-motor (17), or E1
regulator supply (16).
Faulty E1 voltage controls 1R3,
Replace control or switch.
1AT4, 1AT2 (12, 11, 10, figure
Faulty variable power transformer
1T1 (20, figure 9-12).
Faulty MODE SELECTOR switch
1S8 (15).
Faulty POWER ON-OFF switch
1S7 (21).
Faulty HEADING SELECTOR
switch 1AT1 (34).
E2 voltage cannot be adjusted to
E2 power supply subassemblies
Perform voltage range test of
null NULL INDICATOR with
shorted to chassis ground.
tabk 7-2, step 4.
Turntable on headings of 90 and
270 degrees.
Faulty E2 regulator amplifier
Perform power test of table 7-2,
1A2 (18, figure 9-7), E2
step 1, part II.
gearcase-motor (17), or E2
regulator supply (16).
(Continued)
(Continued)
6-3
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