Section IV ALINEMENT AND ADJUSTMENT PROCEDURES

TM 11-6625-2975-40

Section IV ALINEMENT AND ADJUSTMENT PROCEDURES

Para

Page

Subject

General . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-18

Audio Tone Level Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-19

2-32

2-34

AM Modulation Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-20

Analog Card A2A2 +12 VDC Regulator Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .. 2-21

2-36

2-38

Power Supply Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-22

2-40

RF Output Frequency Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-23

2-41

RF Output Level Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .2-24

2-42

2-25

VOR Radial Adjustment . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . .

2-44

Audio Tone Frequency Alinement . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . . 2-26

2-18. GENERAL.

The following alinement/adjustment procedures should be performed only if you are instructed to do

so by the troubleshooting procedures in section Ill, or as a followup to replacement of a test set

assembly.

After test set assembly A2, A3, A4, or A5 is replaced, the alinement/adjustment procedures specified

in the following table must be performed.

Dust cover must be removed before attempting any alinement and adjustment procedure (para 2-28),

ASSEMBLY

ALINEMENT/ADJUSTMENT PROCEDURES

REPLACED

Analog Card A2A2 +12 VDC Adjustment (para 2-21), Audio Tone

Frequency Alinement (para 2-26), Audio Tone Level Alinement

(para 2-19), VOR Radial Adjustment (para 2-25).

RF Output Level Alinement (para 2-24) AM Modulation Adjustment

(para 2-20)

RF Output Frequency Alinement (para 2-23)

Power Supply Alinement (para 2-22)

Each alinement procedure is self-contained, that is, all necessary instructions are provided without

reference to any previously preformed alinement. All necessary test equipment is also listed within

each procedure.

WARNING

HIGH VOLTAGE is used during the following procedures. Death on contact may result if

personnel fail to observe safety precautions. Dangerous potentials exist at several

points throughout this equipment, when it is operated with the cover removed. Do not

touch exposed connections or components.

2-31