M2/M3 BFV: FIRE CONTROL SYSTEM - OD1608 - LESSON 2/TASK 1
(1) Set the power (PWR) switch on the CIB to the ON position.
(2) Push the circuit breaker switch on the VTM to ON.
(3) The display on the VTM should show .8.8.8.8 for about two
seconds and then change to four dashes (- - - -). If this sequence
is NOT displayed, the STE test set is faulty, and the following
actions should be taken:
(a) If nothing appears on the display, check all cable
connectors for tightness; then, if nothing appears on the display,
troubleshoot the STE test set for the symptom NO VTM DISPLAY ON POWER
UP, in accordance with TM 9-4910-751-14-1, chapter 5.
(b) If any one dot, number eight, or dash does not appear on
the display, replace the faulty display module, in accordance with TM
9-4910-751-14-1, chapter 5.
(c) If the VTM display shows blank, then shows .8.8.8.8, then
is blank again, troubleshoot the STE test set for the symptom VTM
DISPLAYS BLANK, THEN .8.8.8.8, THEN BLANK, as outlined in TM 9-4910-
751-14-1, chapter 5.
b. VTM Confidence Tests.
Two VTM confidence tests must be
performed as the first steps in the self-test (refer to figure 46 on
page 63).
(1) VTM Confidence Test 66.
To perform the first VTM confidence
test, follow these steps:
(a) Set the TEST SELECT switches on the VTM to 66.
(b) Press the TEST button on the VTM.
(c) The display on the VTM should show 0066. If it does not
show 0066, troubleshoot the test set for the symptom VTM DOES NOT
DISPLAY 0066, in accordance with the instructions contained in TM
9-4910-751-14-1, chapter 5.
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