Section III. REPAIR

TM 11-6625-3023-14/ET904-AA-MMA-010/E154 TS3684/TO 33A1-12-1173-1

Section III. REPAIR

6-5. Introduction. This section describes the repair instructions for the test set and consists of removal and

replacement procedures for electrical and mechanical items. Repair procedures are divided into three areas: panel

assembly repair, circuit board repair and cable assembly repair. Visual aids for the repair procedures are provided in the

form of parts location diagrams (fig. 6-1 and 6-2) and wiring diagram (fig. FO-3).

CAUTION

Before performing any removal or replacement procedures, ensure that there are

no external connections made to the test set.

6-6. Panel Assembly Repair. The panel assembly repair consists of removal and replacement procedures for the

indicators, rotary switch, and toggle switches. The following paragraphs describe the removal and replacement

procedures for these items.

6-7. Removal Ad Replacement Procedures. Refer to figures 6-1 and 6-2 for component location during the following

removal and replacement procedures.

6-8. Lampholder. Any of the two lampholders (L1 and L2) located on the test set panel assembly may be removed and

replaced by performing the following procedures:

a. Removal. Perform the following procedure to remove lampholder:

(1) Remove the eight Phillips head screws securing panel assembly to case and remove panel assembly.

(2) Tag, unsolder and remove connecting wires from lampholder.

(3) Remove nut and lock washer securing lampholder to panel assembly and remove lampholder.

b. Replacement. Perform the following procedure to replace lampholder:

(1) Insert lampholder into panel assembly and secure with nut and lock washer.

(2) Install and solder wires as tagged.

(3) Replace panel assembly and secure to case with the eight Phillips head screws.

6-9. Toggle Switch. Any toggle switch (S1, S2, S3, S5 and S6) located on the test set panel assembly may be

removed and replaced by performing the following procedures.

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