TM 11-6625-3081-23
7-38. PORTABLE VIDEO MONITOR
7-38
INPUT CODE: VIDEOST
a .
DESCRIPTION
This module tests the portable video monitor.
The portable monitor is first
checked for uniform brightness.
The operator is prompted to observe the portable
monitor for uniform brightness over the entire screen, and to press yes if the
brightness is acceptable and no if it unacceptable. If unacceptable, the operator
is prompted to replace portable monitor.
The operator is prompted to place the FULL UNDER switch to the UNDER position
and adjust the HEIGHT control until the vertical and horizontal borders are about
the same on all four sides.
The operator is prompted to press yes if acceptable and
no otherwise.
If no, the operator is prompted to replace the portable monitor.
The operator is next prompted to place the FULL UNDER switch to the FULL
position and verify that the display is now completely illuminated and the border
has been completely removed.
The operator presses yes if the display is completely
illuminated, no otherwise.
If no, the operator is prompted to replace the portable
monitor.
The operator is next prompted to observe that a fine vertical bar pattern is
visible on the monitor and to press yes if the image is acceptable and no if the
image is unacceptable.
If no, the operator is prompted to replace the portable
monitor.
b. REPLACEMENT PROCEDURE REFERENCE
Replacement procedures for portable monitor are not provided in this manual.
c .
ERROR MESSAGES
The following is a list of error messages associated with portable video monitor
test.
1. VIDEO-MONITOR GREYSCALE TEST FAILED.
2. VIDEO-MONITOR FLAT-FIELD PATTERN TEST FAILED.
3. MONITOR UNDER SIZE PATTERN TEST FAILED.
4. MONITOR FULL SIZE PATTERN TEST FAILED.
5. 10 MHz BAR PATTERN TEST FAILED.
d. CORRECTIVE ACTION - VIDEOST
Remove portable video monitor. Check cables and connectors and repair as
required.
Install replacement portable video monitor and perform VIDEOST
test.
If VIDEOST test passes, no further action required. If VIDEOST
continues to fail, next higher level of maintenance required.
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