TABLE 7-2. CONSOLE TEST PROCEDURES (cont)
Normal
Circuit or
If Indication
Step
Procedure
Indication
Function Tested
Is Abnormal
Calculate the index error by
2
Index error shall
Same as part I, this
Refer to part I, this
adding the six errors alge-
be 03 minutes.
Part
step.
step.
braically, one for each head-
VII
ing, and divide the sum by
six. See following example:
EXAMPLE:
Field
Console
Difference
Tester
Console
El NORM. -REV.
(minutes)
S1 Switch Heading
Readout Indication
Switch
0 DEGREES -7 MINUTES -7 (red error scale*)
1
0
REV
120 DEGREES -5 MINUTES -5 (red error scale*)
2
120
REV
240 DEGREES +6 MINUTES +6 (white error scale*)
3
240
REV
1
160 DEGREES -15 MINUTES -15 (red error scale*)
180
NORM
300 DEGREES -3 MINUTES -3 (red error scale*)
300
NORM
60
NORM
3
60 DEGREES +20 MINUTES +20 (white error scale*)
-4 min
6 = -0.66 minute -4
*Only when testing Console, Part No. 2588219. For Console, Part No. 2587177, refer to note
El Voltage Range Test
3
art
I
Connect equipment as in
Check circuit wiring.
step 2, part I.
indicate within 5
voltage supply output
Replace as required.
percent of voltage
at E1 switch 1S1A5
indications on E1
Set multimeter to DC
and 8.
Substitute E2 subassem-
VOLTS and connect to
bly for suspected defec-
VOLTS and vernier
field tester 5J3 and 5J4.
tive E1 subassembly.
controls at each
setting.
Check switches and
Set the Console as
controls. Replace as
follows:
necessary.
El NORM. -REV. to
NORM.
MODE SELECTOR to
MON.
E2 NORM. -REV. to OFF.
POWER ON-OFF to
POWER ON.
Rotate ADJUST VOLTS
control of Console to ob-
tain a reading of 23.5
volts on EXC VOLTS
meter and allow 2 minutes
to stabilize.
S2 of field tester to E1.
(Continued)
7-5