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TM 11-7010-201-40-5/ET821-AA-MMI-050/E154 MTS/T O 31S5-2TSQ73-2-5
(3) Close front panel (17) and secure to chassis (1) with three knurled captive screws.
(4) Install knob (24) on rotary switch (23), and secure with two set screws.
5-11. Pushbutton Switch Removal and Replacement . (See figure 5-1.) Either pushbutton switch (21) located on the
MTS test aid front panel (17), may be removed and replaced by performing the following procedures.
a. Removal. Perform the following procedure to remove either of two pushbutton switches (21).
(1) Loosen three knurled captive screws securing front panel (17) to chassis (1) and open front panel (17).
(2) Tag, unsolder, and remove wires attached to pushbutton switch (21).
(3) Remove nut securing pushbutton switch (21) to front panel (17) and remove pushbutton switch (21).
b. Replacement. Perform the following procedure to replace either of the two pushbutton switches (21).
(1) Install pushbutton switch (21) and lockwasher in front panel (17), and secure with nut.
(2) Install and solder wires as tagged.
(3) Close front panel (17) and secure to chassis (1) with three knurled captive screws.
5-12. Toggle Switch Removal and Replacement. (See figure 5-1.) Either toggle switch (22) located on the MTS test
aid front panel (17) may be removed and replaced by performing the following procedure.
a. Removal. Perform the following procedure to remove either of two toggle switches (22).
(1) Loosen three knurled captive screws securing front panel (17) to chassis (1) and open front panel (17).
(2) Tag, unsolder, and remove two wires attached to toggle switch (22).
(3) Remove nut securing toggle switch (22) to front panel (17) and remove toggle switch (22).
b. Replacement. Perform the following procedure to replace either of two toggle switches (22).
(1) Install toggle switch (22) and lockwasher in front panel (17), and secure with nut.
(2) Install and solder two wires as tagged.
(3) Close front panel (17) and secure to chassis (1) with three knurled captive screws.
5-13. Circuit Board Repair. Circuit board repair consists of removal and replacement procedures for the circuit board
and components installed on the board. The components covered are integrated circuits and the resistor adapter plug.
The following paragraphs describe the removal and replacement procedures for these items. Index numbers below refer
5-9

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