TM 5-6675-316-14
Table 3-10. DIRECT/GENERAL SUPPORT TROUBLESHOOTING — Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
6. X-AND/OR Y-COORDINATES NOT INDICATED ON X-Y DISPLAY—Cont
(c) Replace printed circuit boards.
(1) Keyboard interface circuit board (paragraph 3-20.9).
(2) Encoder circuit board (paragraph 3-20.9).
(3) X-Y display circuit board (paragraph 3-20.15).
(4) CPU circuit board (paragraph 3-20.9).
7. DIGITIZER KEYBOARD WILL NOT INPUT DATA TO X-Y DISPLAY.
Check all related wiring and ribbon cables for continuity.
(a)
(b)
(c)
(d)
(e)
If present, proceed to step (c).
If not present, replace cable or wiring.
Replace CPU circuit board (paragraph 3-20.9).
Replace digitizer keyboard (paragraph 3-20.11).
Replace keyboard interface circuit board (paragraph 3-20.9).
8. DIGITIZING INFORMATION NOT RECEIVED BY TELETYPEWRITER.
Check all wiring and ribbon cables for continuity.
(a)
(b)
(c)
(d)
If present, proceed to step (c).
If not present, replace cables or wiring.
Replace TTY interface circuit board (paragraph 3-20.9).
Replace CPU circuit board (paragraph 3-20.9).
Change 1
3-141
