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TM 11-6625-3023-14/ET904-AA-MMA-010/E154 TS3684/TO 33A1-12-1173-1
(1) Remove the panel assembly as described in paragraph 6-8a.
(2) Remove the four nuts, flat washers and lockwasher securing circuit board to top of the four hexagonal spaces
and lay circuit board to the side.
(3) Loosen set screw securing rotary switch knob (fig. 3-1) to rotary switch and remove knob.
(4) Tag, unsolder, and remove connecting wires to rotary switch.
(5) Remove nut and lockwasher securing rotary switch to panel assembly and remove rotary switch.
b. Replacement. Perform the following procedure to replace the rotary switch:
(1) Install rotary switch on the panel assembly and secure with nut and lock washer. Ensure rotary switch guide pin
fits in panel hole.
(2) Install and solder wires as tagged.
(3) Install knob on rotary switch shaft and secure with set screw.
(4) Install circuit board on top of hexagonal spacers and secure with the four nuts, flat washers and lockwasher
(5) Replace panel assembly as described in paragraph 6-8b.
6-12. Power Transformer. The power transformer (T1) may be removed and replaced by performing the following.
procedures.
a. Removal. Perform the following procedure to remove power transformer:
(1) Remove panel assembly as described in paragraph 6-8a.
(2) Remove circuit board assembly as described in paragraph 6-11a.
(3) Tag, unsolder, and remove connecting wires to power transformer.
(4) Remove four screws, lockwasher
and nuts securing power transformer to panel assembly and remove power
transformer.
b. Replacement. Perform the following procedure to replace power transformer:
(1) Install power transformer on panel assembly and secure with the four screws, lockwasher and nuts.
6-21

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