TM 5-6675-319-14
d.
If the photogrammetric rectifier does not power up when turned on, verify
that 120 V ac is present at the receptacle.
If voltage is not present, plug equip-
ment into receptacle with power available and proceed with equipment trouble-
shooting.
Perform no-power procedures for dead receptacle (Table 1-4).
Table 7-4. ORGANIZATIONAL TROUBLESHOOTING
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
1.
MAGNIFICATION MOTOR WILL NOT OPERATE.
Check for a broken shear pin.
Replace shear pin (paragraph 7-16.3).
2.
TILT AND MAGNIFICATION MOVEMENTS OVERRIDING THEIR LIMITS.
Check limit switch(es) for correct operation.
Replace limit switch(es) (paragraphs 7-16.7 and 7-16.8).
3.
CIRCUIT BREAKER WILL NOT RESET.
Check
4,
DRIVE
thermal overload heater for continuity.
Replace thermal overload heater (paragraph 7-16.11).
MOTOR INOPERATIVE
Step 1.
Check directional control switch on TILT or MAG assembly for
c o n t i n u i t y .
( a ) I f c o n t i n u i t y i s p r e s e n t , p r o c e e d t o s t e p 2.
(b) Replace directional control switch (paragraph 7-16.10) .
Step 2.
Check for defective wiring.
( a ) I f w i r 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 3.
( b ) R e p a i r o r r e p l a c e d e f e c t i v e w i r i n g .
7-121
