TM 11-5821-333-30
Section IV. MAINTENANCE PROCEDURES
3-11. GENERAL
This section has inspection, operational check, and repair procedures.
Normally you should do maintenance in this order:
a.
Inspection. Check if the rcu is damaged or incomplete. Replace any damaged or missing components.
b. Troubleshooting. Done on faulty rcu noted in operation or during operational check. Do not
troubleshoot good equipment.
c. Repair. The repair procedures are used to restore a faulty rcu to serviceable/operable condition, Repair
is by replacement of bad module or part.
d. Placing in Service. After bad item have been replaced, the rcu must be retested using operational
check. When the rcu is working, it may be placed in service.
3-12. INSPECTION
Many faults can be found by inspection. If any are found, replace the bad item. The following chart can be used
as a guide.
ITEM
REMARKS
Front panel and cover
No cracks or dents, No broken or missing parts
such as knobs or screws.
Connector
No broken or missing pins.
Display
No cracks, chips or moisture seepage.
Switches
Check for freedom of movement.
3-13. OPERATIONAL CHECK
Do the operational check in paragraph 3-9 to verify correct rcu operation.
3-14. REPAIR
Repair consists of removing a bad item and installing another.
a. General Instructions. The following instructions apply to all repair tasks.
1.
2.
3.
4.
5.
6.
Set FUNCTION switch to STOW.
Remove any cable if connected to rcu.
inspect the rcu for damage. Repair any obvious physical damage.
Handle all modules carefully.
Before installing a module, check the connector for bent or broken pins. Do not install if damaged.
Perform operational check before returning to service.
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