A4000 MODULES AND ASSEMBLY REPLACEMENT.

TM 11-5820-670-30

2-41. A4000 MODULES AND ASSEMBLY REPLACEMENT.

MATERIALS/PARTS: Amplifier assembly, if. A4100 (P/N SMC413726)

Amplifier assembly, if. A4000 (P/N SME619985)

Amplifier, frequency, audio, A4300 (P/N SMB413785)

Discriminator, frequency, electrical, A4200 (P/N SMC413753)

Filter, band-pass, FL4001 (P/N SMD413720)

Filter, band-pass, FL4002 (P/N SMD413719)

PRELIMINARY PROCEDURE: Remove case (para 2-39).

REMOVAL

1. Using screwdriver, loosen two captive screws (1) and swing out assembly (2).

NOTE

Assembly can be removed with or without first removing modules. If assembly is to be

removed without removing modules, proceed to step 6.

Modules A4100 through A4300 are secured with captive screws. Steps 2 and 3 are

typical for all modules.

2. Using screwdriver, loosen captive screws (3).

3. Carefully pull module (4) off board to release from pins. Do not twist from side to side.

CAUTION

Care must be taken when performing next step to prevent damaging test points on printed

circuit board.

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