Section VII
TABLE 7-2. CONSOLE TEST PROCEDURES (cont)
If Indication
Circuit or
Normal
Is Abnormal
Indication
Function Tested
Procedure
Step
S2 of Field Tester to
E1 and E2 voltages
E1/E2.
to a common ground.
The multimeter
Momentary de-
S3 of Field Tester to OFF.
measures the differ-
flection exceed-
ential voltage. To
ing 0.050 volt
check load regulation,
E1 NORM. -REV. of
is normal.
an 18K resistor is
Console to E1 NORM.
applied across E1
output or a 56K re-
E2 NORM. -REV. of
sistor across E2
Console to E2 NORM.
output, and the dfffer -
ential voltage is
measured.
MODE SELECTOR to
MON.
El and E2 VOLTS and
vernier of Console to
90-9-500.
Adjust E2 VOLTS and
vernier of Console until
multimeter indicates
0 volts.
S3 of Field Tester to E1
and then to E2,
E1/E2 Line Regulation
6
Check
Substitute for E1 and
The a-c input voltage
S3 of Field Tester to OFF.
Multimeter shall
E2 regulator amplifier
is varied by adjusting
show a momentary
subassembly, one at
deflection and then
output of variable
Adjust EXC VOLTS of
a time.
indicate 0. 050 volt
power transformer.
Console to 22.5 volts,
or less.
then 24.5 volts.
Replace faulty regula-
tor amplifier
subassembly.
7
Angle Indicator Control
Transformer 1A8B2 Index
Part
Error Test
I
Replace angle indicator.
Synchro standard sup-
Refer to part VII,
Connect cable assembly
plies magnetic heading
this step.
W1 from 1J1 of Console to
Replace angle indicator
information for control
Power Cart.
amplifier.
HEADING ERROR
transformer 1A6B2 anc
readout shall indi-
Connect synchro standard
If neither of the above,
null detection circuits
cate 0 DEGREES
to Console 1J4 as follows:
replace Console.
in angle indicator and
angle indicator
amplifier.
7-6A
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