TM5-1260-206-34
TAble 3-2.
DAC Troubleshooting Procedures - Continued
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
Step 2.
Check continuity between B card and C card, pins 10, 12,
13, 15, 16, 18, 25, 26, 27, 29, 30, 34, 35, 37, 40, 42, 46,
If bad, replace or repair faulty wire.
Step 3.
Check that malfunction is corrected.
If not, refer faulty DAC to depot maintenance personnel.
DIGITAL DISPLAY READ-OUT DOES NOT CHANGE AS PHOTO-CARRIAGE IS MOVED
8.
Move photo-carriage diagonally across base plate. Check
Step 1.
whether one display (X or Y) or both X and Y do not change.
If one display, do step 2.
If both displays, replace card D.
Step 2.
Remove DAC top and bottom cover plates.
To prevent damage to electronic components, always reenergize
unit before removing or inserting printed circuit cards.
Swap position of B card (X-axis) with C card (Y-axis).
Check which display does not change.
(See
If same display as step 1, replace card A.
If other display, replace card B or card C.
Step 3.
Check continuity between card A, pins A3 and A36, and
If bad, replace or repair faulty wire.
Step 4.
Check that malfunction is corrected.
If not, refer faulty DAC to depot maintenance personnel.
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