CHAPTER 6 DEPOT MAINTENANCE

TM 11-6625-667-45/NAVAIR 16-30APM123-2/TO 33A1-3-367-22

CHAPTER 6

DEPOT MAINTENANCE

6-1. Depot Rebuild Operations

Complete rebuild of Test Set, Transponder AN/

APM-123V( ) and/or its individual components

may be accomplished by depot maintenance

facilities when authorized. Rebuild action will in-

clude all repairs, rebuild, and replacement opera-

tions necessary to make the equipment suitable for

return to DA supply system storks for reissue to

using organizations as equipment equivalent to

6-3. Repair of Cavity A16A1Z1

new material. Detailed procedures for accomplish-

(fig. 6-1)

ing the repairs and adjustments established in the

preceding portions of this manual and such addi-

tional repair and rebuild operations as deemed

necessary will be established by the facility per-

forming the work. Paragraphs 7-1 through 7-13

establish the requirements that must be met by re-

built or repaired equipment before it is returned

to DA supply system stocks.

6-2. General Parts Replacement Techniques

a. Read the instructions in paragraph 4-1.

These instructions contain important information

Note. In the following procedure, it is assumed that

pertaining to parts replacement.

the RF shield (8) was removed (a above).

b. If any control setting is disturbed during

(1) Remove the five screws (23) and the sixth

rebuild operations, except those indicated in c

screw (19), securing the tuning core holding as-

below, refer to paragraph 4-2 for adjustment

sembly (33) to the cavity housing (32). Remove

instruction

the tuning core holding assembly.

c. The pulse spacing output of delay line

(2) Remove the screw (26) and nut (27) that

A6DL1 is critical for equipment calibration Re-

secure the tuning sleeve (31), angle bracket (16).

placement of parts in circuits associated with this

and terminal lug (28) to the cavity housing (32).

output may require recalibrating the circuit. If the

This action also releases capacitor insulator disks

settings of controls A5R1 through A5R5 or A7R1

(29 and 30).

through A7R14 are disturbed, recalibration will be

c. Reassemby Procedure.

necessary. Calibration instructions are provided

(1) Replace the screw (26) in the tuning

during the applicable tests (paras 7-5 through

sleeve (31). Set the capacitor insulator disk (30)

7-13) if such action is required.

Change 2 6-1