M2/M3 BFV: FIRE CONTROL SYSTEM - OD1608 - LESSON 2/TASK 4
(1) If the SETCOM displays a cable instruction message word
number, refer to the message word number index found on page 3-553 of
TM 9-2350-252-20-2-1 and follow the SITCOM instructions.
Assume,
however, for the purposes of this subcourse, that the SETCOM does not
display a cable instruction message word number.
(2) If the SETCOM displays a fault message, it would be
necessary to refer to the fault number index found on page 3-605 of
TM 9-2350-252-20-2-1. However, assume again that no fault message is
displayed.
(3) The third possibility is that the display will show a NO
FAULTS FOUND message. When a NO FAULTS FOUND message appears on the
display, it is necessary to ask two questions before continuing the
procedure.
The first question asks if the test is being repeated.
The second question asks whether the symptom has been corrected. If
the test is being run for the first time and the symptom has not been
corrected, further testing is required as described in paragraph 2c
below.
If the test is being repeated, or if the test is not being
repeated but the fault symptom that prompted the test has been
corrected, the test is essentially complete.
In this case, the
follow-on procedures listed below should be performed.
(a) If the test is a repeat or the
symptom
has
been
corrected, move the TURRET POWER switch to OFF.
(b) Turn OFF the MASTER POWER switch.
(c) Remove the STE test set from the diagnostic panel.
(d) If they were removed during earlier test procedures,
install turret floor plates (TM 9-2350-252-20-2-2, page 4-22).
c. Test Continuation - Isolating a Fault.
When the SETCOM
display shows a NO FAULTS FOUND message, but a fault is evident in
the system (i.e., the symptom which prompted the test to be run in
the first place is still present), further testing will be required
to try to isolate the component which is causing the malfunction.
Once the faulty
102
Previous Page
