Section VI. REPAIR AND REPLACEMENT OF AUTHORIZED PARTS
3-21. Removal of Circuit Card Assemblies. Seven
of the circuit cards are held in place by combina-
Make sure power is disconnected.
tions of screws and self-locking nuts or of screws,
of two of the cards.
Front Panel Assembly. R e m o v e
3-17. Removal of
head screws holding the Front Panel
3-22. Repair. N o r e p a i r s of circuit cards are
the Carrying Case. Loosen the panel
authorized at field level.
lift it out of the case.
3-23. Replacement of Circuit Card Assemblies.
Replace the Circuit Cards in their positions using
Do not damage small components dur-
the appropriate attaching hardware. Do not fully
tighten at this time.
3-18. Removal of Soldered Connections. Carefully
electrical connections as originally done. Refer to
unsolder wiring connections at the component us-
i n g adequate heat sink procedures to avoid
secure circuit cards in place.
damage to nearby components. Annotate connec-
tions at this time to facilitate reconnection and to
avoid possible errors during reconnection.
3-25. Replacement of Electronic Components.
Any components removed from the Front Panel
3-19. Removal of Electronic Components. Once
the external connections to a component have been
the proper spare.
removed, most components can then be readily
removed from the Front Panel Assembly. Some
3-26. Replacement of Soldered Connections.
are held by mounting screws, others are held by
3-20. Component Replacement. Components can
3-27. Adjustment After Replacement. Refer to
be replaced on an individual basis once they are
removed from the Front Panel Assembly.
Change 1 3-17/(3-18 blank)