TM 5-6675-319-14
Table 9-5. DIRECT/GENERAL SUPPORT TROUBLESHOOTING - Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
20.
PRINTER
EXPOSED
Step 6.
Step 7.
FUNCTIONS CORRECTLY IN TEST AND MANUAL MODES. PRINTS ARE OVER-
IN AUTOMATIC MODE. CRT SWEEPS ARE VERY SLOW IN AUTOMATIC MODE - Cont
Check resistance between pins 1 and 2 of PMT sensitivity adjustment
potentiometer R106 while varying resistance from maximum to minimum.
Reading should be from 0 to 250 k ohms.
( a ) I f r e s i s t a n c e r e a d i n g i s c o r r e c t , p r o c e e d t o s t e p 7 .
( b ) I f r e a d i n g i s i n c o r r e c t , r e p l a c e P M T s e n s i t i v i t y a d j u s t m e n t
potentiometer (paragraph 9-20.30).
Check output of circuit card 3C2.
( a ) I f o u t p u t i s c o r r e c t , p r o c e e d t o s t e p 8 .
( b ) I f o u t p u t i s i n c o r r e c t , r e p l a c e c i r c u i t c a r d 3 C 2 ( p a r a g r a ph
9-20.21).
NOTE
Perform maximum scan rate and exposure index adjustments after replacing
circuit card 3C2.
Step 8. With power off and MODE switch S103 set to AUTO, check for
continuity between pins 1 and IL of MODE switch wafer X.
If continuity is not present, replace S103 (paragraph 9-20.29).
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