TM 5-3610-253-14
Table 5-9. DIRECT/GENERAL SUPPORT TROUBLESHOOTING - Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
9. WHEN USING THE FOOT PEDAL, THE CLAMP DOES NOT OPERATE AT ALL - Cont
Step 6.
Check for a short between pins 1 and 2 of plug connector SZ 42 when
the foot pedal is depressed and an open circuit when the foot pedal
is released.
(a) If incorrect, replace clamp foot pedal switch (paragraph
(b) If correct, replace PC card 5 (paragraph 5-20.11).
(c) If problem persists, refer to electronic schematics and
troubleshoot.
10. CLAMP DOES NOT OPERATE WHEN CUTTING BUTTONS ARE DEPRESSED.
With cutting buttons depressed, check for +24 V at pin 7 on plug connector
SZ 40. Use plug connector ST 70 pin 5 as ground.
(a) If present, replace PC card 5 (paragraph 5-20.11).
(b) If missing, refer to malfunction 11 and troubleshoot.
11.
WITH CUTTING BUTTONS DEPRESSED, CUTTING AND CLAMPING ARE INOPERATIVE, LIGHT
BARRIER SIGNAL LAMP IS LIT.
Step 1.
Check that the light barrier goes off momentarily and then comes
back on.
(a) If correct, proceed to step 6.
(b) If incorrect, proceed to step 2.
Step 2.
Check for +24 V at pin 8 of plug connector SZ 15 with both
cutting buttons depressed. Use plug connector ST 70 pin 5 as
ground.
(a) If correct, replace PC card 9 (paragraph 5-20.11).
(b) If +24 V is missing, proceed to step 3.
