TM 11-6625-3025-14/ET426-AA-MMA-010/E154 VII210/T.O. 33A1-8-902-1-1
a.
Removal. Remove voltage regulator Z1 or Z3 as follows:
(2) Remove two screws securing filter capacitors circuit board. (This will allow access to remove and
replace voltage regulator Z1 or Z3.)
(3) Remove two screws, nylon washers, lockwashers, nylon spacers, mica insulator and nuts securing
voltage regulator to heat sink and circuit board.
(4) Unsolder voltage regulator terminals connected to circuit board and remove regulator from circuit board
and heat sink.
b.
Replacement. Replace voltage regulator Z1 or Z3 as follows:
(1) Apply silicon thermal compound to base of voltage regulator.
(2) Insert mica insulator over voltage regulator terminals and insert regulator into the two terminal holes in
heat sink and circuit board.
(3) Insert regulator with two screws and mica insulator into holes in heat sink.
(4) Place nylon spacers and washers over screw threads, insert into circuit board and secure with
lockwashers and nuts.
(5) Solder regular terminals to circuit board.
(6) Replace filter capacitors circuit board with two screws.
6-31. Printed Circuit Board Connectors Removal and Replacement.
Perform the following procedure to remove and replace printed circuit board connectors (see figure FO-20).
a.
Removal. Remove printed circuit board connector as follows:
(1) Remove top and bottom panels (eight screws per panel).
(3) Tag and unsolder leads to connector.
(4) Remove two screws, lockwashers and nuts securing connector to card frame and remove connector.
6-19