TM9-4935-481-14-1
C4
Table 3-8. DMS-D Self Test Procedure-Continued
EQUIPMENT NOTES
STEP
UNIT
PROCEDURE
CORRECTIVE ACTION
1. The Self Test Procedure selects functions from the Performance Test which are critical to the overall operation of the DMS.
Correct read-outs during performance of the Self Test insures proper equipment operation during subsequent testing of
195
CIP
RUN/HOLD/OFF switch to OFF.
faulty assemblies.
196
TP
Observe GO lamp illuminated and NO GO lamp extinguished
197
TP
Adjust ERROR AMPLITUDE control slowly cw until GO lamp JUST extinguishes.
2. It is essential that the Self Test be performed on a daily basis when the equipment is being operated extensively. The Self
198
DMM
Observe a reading of -2.289 to -2.312 Vdc.
Test should also be performed when any doubt arises pertaining to system integrity during equipment testing.
199
TP
Adjust ERROR AMPLITUDE control slowly ccw until GO lamp illuminates and then
JUST extinguishes.
3. When the DMS-D is first turned on, it is important that the DMM probes be shorted to ground for the full warm up period.
200
DM1
Observe a reading of -2.687 to -2.714 Vdc.
This is to null out any DMM offset.
201
TP D1MM
Adjust ERROR AMPLITUDE control to +2.500 0.0100 Vdc.
202
ITP
INTERNAL TEST switch to 10.
4. During ALIGN 2 adjustment it is very difficult to adjust to a within tolerance condition. If adjustment to within tolerance is
203
TP
Observe GO lamp illuminated and NO GO lamp extinguished.
not obtainable, it will be necessary to short the DMM probes and check the DMM offset.
204
TP
Adjust ERROR AMPLITUDE control slowly cw until GO lamp JUST extinguishes.
205
DMM
Observe a reading of +2.687 to +2.714 Vdc.
5. If a problem is encountered during counter readings, check the COMPARATOR THRESHOLD B and C settings and
206
TP
Adjust ERROR AMPLITUDE control slowly ccw until GO lamp illuminates and then
adjustments of the counter A & B sensitivity controls.
JUST extinguishes.
207
DMM
Observe a reading of +2.289 to +2.312 Vdc.
6. When using COUNTER INHIBIT (SFC) dial, most tests can be restarted by momentarily actuating the PPE TEST START
208
PP
MAIN POWER and DMS switches to OFF
Switch.
209
Disconnect all test leads.
7. When adjusting the LO FREQ AMPTD potentiometer, the DMM reading will be taken after the oscillator stabilizes. Time to
DMS-D Test Set is now ready to perform DRAGONI
stabilize may be less than, or greater than, 3 minutes.
Weapon System Equipment Performance Test.
8. During the ERROR AMPLITUDE adjustment in the TRAINER Section tests, the potentiometer may be returned to the actual
switch point without degredation of the test.
3-57/(3-58 Blank)