Table 4-4. DIRECT/GENERAL SUPPORT TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
5.
DIGITAL DISPLAY DOES NOT CHANGE WHEN CHANNEL CONTROL SWITCH IS ROTATED.
Step 1.
Check for defective channel control switch
(a)
If switch is not defective, proceed to step 2
(b)
If switch is defective, replace switch (paragraph 4-20.1)
Step 2.
Check for defective display board.
(a)
If display board is not defective, notify supervisor
(b)
If display board is defective, replace display board (paragraph 4-20.5)
6.
FIRST DIGIT OF DIGITAL DISPLAY MAINTAINS A WHOLE NUMBER FOR ALL SAMPLES TESTED.
Defective photomultiplier board assembly
Replace photomultiplier board assembly (paragraph 7-20.6)
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