SECTION III PREPARATION FOR MAINTENANCE

T.O. 12P4-2APX-192

NAVAIR 16-35TS1843-1

TM 11-6625-1646-25

SECTION III

PREPARATION FOR MAINTENANCE

at the front of the case to disengage the unit from the mount at

3-1.

GENERAL.

that point. Slightly raise the front of the unit and pull forward

3-2 This section contains information pertinent to preparation

until the test set is disengaged from the mount and can be

of the test set prior to performing maintenance procedures

removed.

specified in following sections of this manual.

3-5.

PREPARATION FOR INTERMEDIATE MAINTE-

3-3.

PREPARATION FOR ORGANIZATIONAL MAINTE-

NANCE.

3-6. Place the test set on a bench and remove the eleven

CAUTION

screws attaching the bottom cover to the main frame

A spring wedge secures the rear of the unit

assembly. Remove bottom cover. Next, remove the six

to the mount. To avoid damage to the unit

screws and associated locking washers attaching the top

and/ or mount during removal or installation,

cover to the main frame assembly. Remove the top cover.

the front of the unit must be raised until the

Replace two screws holding interconnecting board assembly

unit clears the spring wedge.

to the RF module casting. The test set is now ready for

maintenance.

3-4.

If the TS-1843A is installed in an aircraft, disconnect

all interconnecting cables and loosen the two Dzus fasteners

SECTION IV

TEST EQUIPMENT AND SPECIAL TOOLS

4-1.

GENERAL.

4-5.

SPECIAL TOOLS REQUIRED.

4-2.

This section lists all special tools, and test equipment

4-6. Special tools required for maintenance are listed in table

required to perform the disassembly, reassembly, testing, and

4-3. In addition an extraction tool, MS24256R-20, insertion

alignment procedures specified in following sections of this

tool, MS24256-A-20, crimping tool, MS3191 (CLASS 1), and

manual.

crimping tool checker, MS3196-20-A (or equivalent) are

4-3.

TEST EQUIPMENT REQUIRED.

standard tools required to extract and replace contacts in the

MS24264 type electrical connector. A module extractor for the

4-4. Standard test equipment required for maintenance of TS-

removal of modules A2 through A4 must be fabricated as

1843A are listed in table 4-1; equivalent test equipment may

shown in figure 4-3.

be used. Special test equipment required are listed in table 4-

2 and illustrated in figures 4-1 and 4-2.

3-1/4-1