Table 4-4. DIRECT/GENERAL SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
DENSITOMETER WILL NOT ENERGIZE.
Step 1.
Check for defective power supply board.
(a)
If power supply board is not defective, proceed to Step 2.
(b)
If power supply board is defective, replace power supply board (paragraph 4-20.4) Step 2. Check
for defective display board.
(a)
If display board not defective, notify supervisor.
(b)
If display board defective, replace display board (paragraph 4-20.5)
2.
REFLECTION PROBE LAMP WILL NOT LIGHT.
Defective power supply board assembly
Replace power board assembly (paragraph 4-20.4)
3.
NO RESPONSE TO PROBE READ PUSHBUTTON.
Step 1.
Check for defective logic board assembly (a) If logic board assembly is not defective, proceed to
step 2.
(b)
If logic board assembly is defective, replace logic board assembly (paragraph 4-20.3) Step 2.
Check for defective clock board assembly.
(a)
If clock board assembly not defective, notify supervisor.
(b) If clock board assembly defective, replace clock board assembly (paragraph 4-20.2)
4.
TWO NUMBERS DISPLAYED IN SAME COLUMN OR ONE NUMBER MISSING IN CLOUMN.
Defective display board assembly
Replace display board assembly (paragraph 4-20.5).
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