TM 5-3610-253-14
Table 5-23. DIRECT/GENERAL SUPPORT TROUBLESHOOTING - Cont
MALFUNCTION
TEST OR INSPECTION
CORRECTIVE ACTION
7.
ERROR MESSAGE 87.
Normally open and normally closed contact of a cutting button are
simultaneously closed.
Check cutting buttons.
Step 1.
(a) Perform cutting buttons test and replace defective parts
(b) If malfunction persists, proceed to step 2.
Step 2.
Replace circuit board IAR (paragraph 5-40.28).
If malfunction persists, proceed to step 3.
Step 3.
Check ribbon cable between circuit board AR and IAR and check
continuity of all pins.
(a) If ribbon cable is defective, replace ribbon cable
(b) If ribbon cable is not defective, proceed to step 4.
Step 4.
Replace circuit board AR (paragraph 5-40.28).
If malfunction persists, refer to electrical and electronic
schematics for fault isolation.
8.
ERROR MESSAGE 88 OR 92.
Safety bolt, without being activated, has left locking position or is not
returning to the locking position within two seconds after cutting cycle
is completed. Knife is not in uppermost position.
Check safety bolt for mechanical stiffness in movement.
Step 1.
(a) If safety bolt moves stiffly, replace safety bolt (paragraph
(b) If not, proceed to step 2.
