31R4-2FRN45-6WC-1.pdf

TO 31R4-2FRN45-6WC-1

15 OCTOBER 2004

CHANGE 5 10 FEBRUARY 2012

DISTRIBUTION STATEMENT D - Distribution authorized to Department of Defense and U.S. DoD contractors only. Due to critical technology (10 February 2012). Other requests for this document shall be referred to OC-ALC/GKAAB, Tinker AFB, Oklahoma 73145-9155.

WARNING - This document contains technical data whose export is restricted by the Arms Export Control Act (Title 22, U.S.C. 2751 et seq.) or Executive Order 12470. Violations of these export laws are subject to severe criminal penalties. Disseminate in accordance with provisions of DoD Directive 5230.25.

HANDLING AND DESTRUCTION NOTICE - Handle in compliance with distribution statement and destroy by any method that will prevent disclosure of the contents or reconstruction of the document.

Published under the authority of the Secretary of the Air Force.

PREVENTIVE MAINTENANCE WORKCARD SET

TACAN NAVIGATIONAL SET AN/FRN-45

THIS PUBLICATION SUPERSEDES TO 31R4-2FRN45-6WC-1, DATED 1 MARCH 2002, BASIC AND ALL CHANGES.

A Change 5

TO 31R4-2FRN45-6WC-1

LIST OF EFFECTIVE CARDS

Insert latest change card. destroy superseded cards.

NOTE: The portions of the text affected by the changes are indicated by a vertical line in the outer margin of the card.

DATES OF ISSUE FOR ORIGINAL AND CHANGED CARDS ARE:

The total number of cards in this publication is 15, consisting of the following:

PAGE NO. CHANGE NO. PAGE NO. CHANGE NO. PAGE NO. CHANGE NO.

Title A I-01 - I-03 1-001

1-002 1-003 - 1-004 1-005 1-006 - 1-008

2-001 - 2-002 5-001

Original. . . . . . . . . . . . 0 . . . . . . . . 15 October 2004 Change . . . . . . . . . . . . 2 . . . . . . . . . . . 22 June 2009 Change . . . . . . . . . . . . 4 . . . . . . 21 November 2011

Change . . . . . . . . . . . . .1. . . . . . . . . . . . 24 April 2009 Change . . . . . . . . . . . . .3. . . . . . . . . . 14 October 2010 Change . . . . . . . . . . . . .5. . . . . . . . . 10 February 2012

MAN

MIN

WORK

AREA

WORK UNIT CODE

INSPECTION

REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB

CARD NO. WORK AREA(S) TYPE MECH RQR MECH NO CARD TIME PUBLICATION NUMBER

TO 31R4-2FRN45-6WC-1

CHANGE NO.

TABLE OF CONTENTS I-01

INTRODUCTION I-02, I-03

1. INSPECTION REQUIREMENTS 1-001

A. 168 DAY 1-002 - 1-005

B. 336 DAY 1-006

2. SERVICING AND LUBRICATION 2-001

INTRODUCTION 2-001

A. 168 DAY 2-002

3. SPECIAL INSPECTION N/A

4. TIME REPLACEMENT ITEMS N/A

5. REPAIR RESTRICTIONS 5-001

I-01

I-01

TABLE OF CONTENTS

PUBLICATION NUMBER

INSPECTION REQUIREMENTS

FIGURE CHANGE NO. CARD NO.

I-02INTRODUCTIONTO 31R4-2FRN45-6WC-1

1. THESE WORKCARDS CONTAIN ALL REQUIREMENTS FOR ACCOMPLISHING SCHEDULED MAINTENANCE ON GROUND ELECTRONIC (C-E) EQUIPMENT DURING ITS ENTIRE SERVICE LIFE. IT ESTABLISHES INSPECTION, ACCESSORY REPLACEMENT, DEPOT LEVEL, AND BASE LEVEL REPAIR REQUIREMENT/RESTRICTIONS. THESE REQUIREMENTS ARE PRIMARILY TECHNICAL IN NATURE AND THE CONDITIONS LISTED ARE INTENDED TO DIRECT ATTENTION TO KNOWN PROBLEM AREAS. THESE REQUIREMENTS ARE DEVELOPED FOR NEW C-E EQUIPMENT THROUGH MAINTENANCE ENGINEERING AND COMPARISON OF SIMILAR INSTALLATIONS, OR IN-SERVICE C-E EQUIPMENT. THE INTERVAL BETWEEN THE ACCOMPLISHMENT OF A REQUIREMENT IS INTENDED TO BE THE LONGEST PERIOD OF TIME THAT AN ITEM OR COMPONENT CAN SAFELY OPERATE WITHOUT AN INSPECTION OR OBSERVATION. WHEN THE C-E EQUIPMENT IS OPERATED IN OTHER THAN THE PRIMARY PURPOSE, OR MAJOR USE CLASS, THE NECESSARY REQUIREMENTS HAVE BEEN ADJUSTED ACCORDINGLY, AND THE REQUIREMENTS IDENTIFIED AS TO CLASS OF OPERATION. THESE REQUIREMENTS AND INSPECTION INTERVALS ARE THE MAXIMUM AND SHOULD NEVER BE EXCEEDED LOCAL. CONDITIONS, (TYPE OF MISSION, SPECIAL UTILIZATION, GEOGRAPHICAL LOCATION, ETC) MAY DICTATE MORE FREQUENT INSPECTIONS, REPLACEMENT OR MORE THOROUGH INSPECTIONS, THEREFORE, COMMANDS, LOCAL COMMANDERS, AND THEIR MAINTENANCE OFFICERS HAVE THE PREROGATIVE TO INCREASE THE FREQUENCY OR SCOPE OF ANY

REQUIREMENT, AND ARE EXPECTED TO EXERCISE THIS PREROGATIVE.

2. THE INSPECTIONS PRESCRIBED BY THESE WORKCARDS WILL BE ACCOMPLISHED AT SPECIFIED PERIODS BY AIR FORCE ORGANIZA- TIONAL ACTIVITIES WITH ASSISTANCE PROVIDED BY AIR FORCE INTERMEDIATE MAINTENANCE ACTIVITIES AND SPECIALIZED REPAIR ACTIVITIES, WHEN REQUIRED, COMPLIANCE WITH THE PROVISIONS OF THESE WORKCARDS IS REQUIRED TO ASSURE THAT LATENT DEFECTS ARE DISCOVERED AND CORRECTED BEFORE MALFUNCTIONING OR SERIOUS TROUBLE RESULTS.

P

3. THE INSPECTION REQUIREMENT ARE STATED IN SUCH A MANNER AS TO ESTABLISH WHAT EQUIPMENT IS TO BE INSPECTED, WHEN IT IS TO BE INSPECTED, AND WHAT CONDITIONS ARE TO BE SOUGHT IN SCOPE. THE REQUIREMENTS ARE DESIGNED TO DIRECT THE ATTEN- TION OF MAINTENANCE PERSONNEL TO COMPONENTS AND AREAS WHERE DEFECTS MAY EXIT AS A RESULT OF USAGE UNDER NORMAL OPERATING CONDITIONS. THEY ARE NOT INTENDED TO PROVIDE COVERAGE FOR ROUTINE CLEANING, WASHING, ETC., NOR ARE THEY DESIGNED TO LEAD TO THE DETECTION OF ISOLATED DISCREPANCIES THAT MAY OCCUR ON A ONE-TIME BASIS, OR DISCREPANCIES THAT ARE THE RESULT OF CARELESSNESS, ABUSE OR POOR MAINTENANCE PRACTICES. DURING ACCOMPLISHMENT OF THE SPECIFIC REQUIREMENTS DIRECTED BY THESE WORKCARDS, MAINTENANCE PERSONNEL SHOULD OBSERVE BOTH THE EQUIPMENT BEING INSPECTED AND THE COMPONENTS IN THE SURROUNDING AREA FOR DEFECTS OR IRREGULARITIES NOT WITHIN THE SCOPE OF THE REQUIREMENTS. REQUIREMENTS REQUIRING THE USE OF ELECTRICAL POWER FOR THE ACCOMPLISHMENT ARE IDENTIFIED BY A COM-

MERCIAL "@" SYMBOL PRECEDING THE PARAGRAPH NUMBER FOR THE REQUIREMENTS.

4. THE REPLACEMENT SCHEDULE DIRECTS REPLACEMENT OF ITEMS AT A SPECIFIC TIME WHEN A FAILURE WOULD COMPROMISE SAFETY OR OPERATION BEYOND REASONABLE LIMITS OR DEFINITELY CAUSE A MISSION FAILURE. ALSO CONSIDERED ARE ANY HIGH COST ITEMS WHOSE FAILURE WOULD RESULT IN CONDEMNATION AND ANY SHORT LIFE ITEMS WHICH WOULD REQUIRE FREQUENT UNSCHEDULED MAINTENANCE. ITEMS NOT LISTED WILL BE KNOWN AS "CONDITION ITEMS" AND WILL BE REPLACED ONLY WHEN NECESSARY. BASE LEVEL REPAIR RESTRICTIONS, LIST ITEMS (BY WORK UNIT CODE, NOMENCLATURE, FSC, AND PART NUMBER) FOR WHICH BASE LEVEL REPAIR RESTRICTIONS HAVE TEEN ESTABLISH, AND DESCRIBES THE REPAIRS WHICH ARE NOT AUTHORIZED.

5. THE TIME IN MAN-MINUTES FOR ACCOMPLISHMENT OF REQUIREMENTS REFLECTS ONLY THE TIME REQUIRED FOR INSPECTION OR REPLACEMENT. THIS TIME DOES NOT INCLUDE TIME REQUIRED TO GAIN ACCESS TO THE EQUIPMENT TO FACILITATE ACCOMPLISHMENT.

THOSE FACTORS (PERSONNEL AND EQUIPMENT SHORTAGES, LACK OF PARTS, ADVERSE WORKING CONDITIONS, AND QUALIFICATIONS OF PERSONNEL) WHICH WILL DIRECTLY AFFECT THE LENGTH OF TIME OF ANY SCHEDULED MAINTENANCE ARE NOT INCLUDED BECAUSE

THEY CANNOT BE ACCURATELY PREDICTED.

INSPECTION REQUIREMENTS

INTRODUCTION

. CARD NO.

I-02

UBLICATION NUMBER

TO 31R4-2FRN44-6WC-1

FIGURE C

HANGE NO

6. THESE WORKCARDS DO NOT CONTAIN DETAILED INSTRUCTIONS FOR TROUBLESHOOTING TO FIND CAUSES FOR MALFUNCTIONING, NOR DO THEY CONTAIN INSTRUCTIONS FOR REPAIR, ADJUSTMENT, OR OTHER MEANS OF RECTIFYING DEFECTIVE CONDITIONS. PROPER INSTALLATION OF A PIECE OF EQUIPMENT OR ACCESSORY IS NOT NECESSARILY WITHIN THE SCOPE OF THESE WORKCARDS AS ADEQUACY AND COMPLETENESS OF INSTALLATION WILL HAVE BEEN DETERMINED AT THE TIME OF INSTALLATION. APPLICABLE POR- TIONS OF THE APPROPRIATE MAINTENANCE MANUAL SHOULD BE CONSULTED TO OBTAIN "HOW TO" MAINTENANCE INSTRUCTIONS AS

THEY ARE BEYOND THE SCOPE OF THESE WORKCARDS.

7. FOR THE PURPOSE OF CLARIFICATION OF TERMS USED IN THESE WORKCARDS. THE FOLLOWING DEFINITIONS ARE GIVEN:

SPECIFIED - REFERS TO A DEFINITE AMOUNT, OPERATION, OR LIMITATION WHICH HAVE BEEN ESTABLISHED AND IS CONTAINED IN

APPLICABLE DIRECTIVES.

EVIDENCE - IS PROOF OF A SUSPECTED OR EXISTING UNSATISFACTORY CONDITION.

SECURE - MEANS THE COMPONENT IS PROPERLY MOUNTED OR ATTACHED TO RELATED EQUIPMENT, INCLUDING APPLICABLE SAFETYING.

ACCESSIBLE - IS THE TERM APPLIED TO EQUIPMENT THAT MAY BE INSPECTED WITHOUT FURTHER DISASSEMBLY OR REMOVAL OF COVERS, CLOSURES, PANELS, ETC., OTHER THAN THOSE REQUIRED TO ACCOMPLISH THE MORE SPECIFIC REQUIREMENTS APPLICABLE

TO THE PARTICULAR INSPECTIONS.

8. CHANGES AND REVISIONS TO THESE WORKCARDS WILL BE PUBLISHED WHEN NECESSARY TO ADD, DELETE, OR CHANGE FREQUENCY ON SCOPE OF REQUIREMENTS, SUCH CHANGES WILL BE BASED ON FACTUAL DATA ACCUMULATED AS A RESULT OF MAINTENANCE EXPERIENCE WITHIN THE EQUIPMENT. RECOMMENDATIONS PROPOSING CHANGES TO THESE WORKCARDS SHOULD BE SUBMITTED ON

AFTO FORM 22 IN ACCORDANCE WITH TO 00-5-1 TO THE USING COMMAND HEADQUARTERS.

NOTE

ALL CORROSION WILL BE TREATED IN ACCORDANCE WITH TO 1-1-689.

INSPECTION REQUIREMENTS

INTRODUCTION

. CARD NO.

I-03

TO 31R4-2FRN44-6WC-1

FIGURE C

HANGE NO

WORK

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INSPECTION

REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB INTRODUCTION 1-001

INSPECTION REQUIREMENTS

1. THESE INSPECTION WORKCARDS PROVIDE THE REQUIREMENTS FOR INSPECTION AND WILL BE USED AS A GUIDE IN PERFORMING THE INSPECTION TO INSURE THAT NO ITEM IS OVERLOOKED. THE CARD SIZE AFFORDS CONVENIENT HANDLING BY MAINTENANCE PERSONNEL WHILE PERFORMING AN INSPECTION WORK ASSIGNMENT INFORMATION IS PROVIDED AT THE BOTTOM OF EACH CARD TO PERMIT ESTABLISH- MENT OF A CONVENIENT FILING SYSTEM FOR THE SET OF CARDS AND IN MAKING WORK ASSIGNMENTS

TO MAINTENANCE PERSONNEL.

2. DETAILED INSTRUCTIONS FOR THE USE OF THESE CARDS AND THE DESCRIPTION AND APPLICATION OF OTHER FORMS AND CHARTS TO BE USED IN CONJUNCTION WITH THESE CARDS ARE CONTAINED IN 00-20

SERIES TECHNICAL ORDERS.

CARD NO. WORK AREA(S) TYPE MECH RQR MECH NO CARD TIME PUBLICATION NUMBER

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CHANGE NO.

1-001

WORK

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INSPECTION

REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 168 DAY ON IN 1-002

SECTION 1 - INSPECTION REQUIREMENTS

1 SPECTRUM CHECK

A. TEST EQUIPMENT REQUIRED:

(1) SPECTRUM ANALYZER, MODEL TEK 492 OR EQUIVALENT

(2) ATTENUATOR PADS; 3 DB ATTENUATOR PAD 5 WATT AND 20 DB ATTENUATOR PAD 5 WATT

B. MATERIALS REQUIRED: NONE

NOTE

IF USING TEKTRONIX 492 SPECTRUM ANALYZER, PERFORM CALIBRATION PROCEDURE

PRIOR TO THE FOLLOWING STEPS.

C. PROCEDURES:

(1) CONNECT SPECTRUM ANALYZER WITH 23 DB ATTENUATION TO RF SAMPLE CONNECTOR 2A1J5

ON HIGH POWER AMPLIFIER 2A1.

a. TEKTRONIX 492 SPECTRUM ANALYZER PROCEDURES:

READOUT PUSHBUTTON TO ON

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1-002 1

WORK

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REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 168 DAY ON IN 1-002

INTENSITY TO DESIRED LEVEL

TRIGGERING PUSHBUTTON TO FREE RUN

BASELINE CLIP PUSHBUTTON TO OFF

TIME/DIV TO AUTO

FREQUENCY SPAN/DIV TO 100 MHZ

ADJUST FREQUENCY CONTROL TO DISPLAY TRANSPONDER FREQUENCY

VERT DISPLAY PUSHBUTTON TO 10 DB/DIV

DIGITAL STORAGE PUSHBUTTON TO VIEW A ONLY

AUTO RESOLUTION PUSHBUTTON TO OFF

RF ATTN DB TO 20 DB

REFERENCE LEVEL TO 0 dbm

RESOLUTION BANDWIDTH TO 100 KHZ

FREQ SPAN/DIV SET TO 500 KHZ

MIN NOISE/DISTORTION PUSHBUTTON TO "ON"

FINE PUSHBUTTON TO OFF

PHASE LOCK PUSHBUTTON TO OFF

VIDEO FILTER PUSHBUTTON TO OFF

PEAK AVERAGE CONTROL FULLY CCW

b. HP 8563A SPECTRUM ANALYZER PROCEDURES:

SET SPECTRUM ANALYZER TO TRANSPONDER FREQUENCY

RESOLUTION BANDWITH -100 KHZ

WORK

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REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 168 DAY ON IN 1-003

VIDEO BANDWIDTH - 100 KHZ

SWEEP TIME - 200 msec

TRIGGER - FREE RUN

AMPLITUDE - LOG DB/DIV

INTERNAL ATTENUATION - SELECT 10 DB OR 20 DB

REFERENCE LEVEL - PUT PEAK OF PULSE ON TOP LINE (PRESS AMPLITUDE BUTTON)

SELECT REF LV

SPAN - 1 MHZ IF MEASURING CENTER FREQUENCY (100 KHZ/DIV)

5 MHZ IF MEASURING THE ± 2 MHZ POINTS (500 KHZ/DIV)

2 MHZ IF MEASURING THE ± 800 KHZ POINTS (500 KHZ/DIV)

(2) OBSERVE PEAK OF SPECTRUM AND VERIFY THAT THE PEAK IS SAF ± 50 KHZ.

(3) OBSERVE SPECTRUM ANALYZER AND VERIFY THAT THE SPECTRUM AT THE ± 2.0 MHZ POINTS

FROM CENTER FREQUENCY IS AN AVERAGE OF -65 dB OR BETTER (EXAMPLE -66) FROM THE

PEAK OF THE PULSE (SEE FIGURE A).

(4) SET SPAN ON SPECTRUM ANALYZER TO 2 MHZ (200 KHZ/DIVISION). OBSERVE SPECTRUM ANA-

LYZER AND VERIFY THE SPECTRUM AT ± 800KHZ POINTS FROM THE CENTER FREQUENCY IS AN

AVERAGE OF -48 DB OR BETTER (EXAMPLE -49) FROM PEAK OF THE PULSE (SEE FIGURE B).

(5) RETURN EQUIPMENT TO NORMAL CONFIGURATION.

CARD NO. WORK AREA(S) TYPE MECH RQR MECH NO CARD TIME PUBLICATION NUMBER

TO 31R4-2FRN45-6WC-1

1-003 2

168 DAY 1-003ATO 31R4-2FRN45-6WC-1 2

FIGURE A. SPAN 5 MHZ (500 KHZ/DIVISION)

0 dB

REF

10 dB/DIV

-65 dB -65 dB

-2 MHz +2 MHz

-800 KHz +800 KHz Fo

168 DAY 1-004BTO 31R4-2FRN45-6WC-1 2

FIGURE B. SPAN 2 MHZ (200 KHZ/DIVISION)

0 dB

REF

10 dB/DIV

-48 dB -48 dB

-800 KHz +800 KHz

WORK

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REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 168 DAY ON OUT 1-005

2. MODULATION GENERATOR CHECKS:

A. TEST EQUIPMENT REQUIRED:

(1) 8502 POWER METER OR EQUIVALENT

(2) DIGITAL VOLTMETER

(3) ATTENUATOR 30 DB TOTAL

B. MATERIALS REQUIRED:

(1) NONE

C. PROCEDURE:

(1) VERIFY ALL MODULATION GENERATOR FRONT PANEL STATUS INDICATORS (GREEN) ARE

ILLUMINATED AND ARE NOT FLICKERING.

(2) VERIFY ALL FRONT PANEL FAULT INDICATORS (RED) ARE EXTINGUISHED.

(3) THE FOLLOWING LAMPS SHOULD BE EXTINGUISHED:

a. EMERGENCY OPERATION

b. SOFT FAIL

c. BEACON SHUTDOWN

d. TEST

e. DME

(4) VERIFY THAT THE COLUMN DISPLAY FLASHES "88" APPROXIMATELY 3.5 SECOND INTERVALS.

CARD NO. WORK AREA(S) TYPE MECH RQR MECH NO CARD TIME PUBLICATION NUMBER

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1-005

WORK

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REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 168 DAY ON OUT 1-005

(5) ENSURE THE ALARM SWITCH IS SET TO ON, AND DEPRESS THE LAMP TEST SWITCH.

(6) VERIFY ALL THE FOLLOWING OCCURS:

a. ALL FRONT PANELS ARE ILLUMINATED

b. COLUMN DISPLAY INDICATES "88"

c. AUDIBLE ALARM IS HEARD

(7) SET THE ALARM SWITCH TO OFF

(8) FROM THE [SYSTEM ADJUSTMENTS] MENU SELECT [SET OUTPUT POWER] ENTER 0 AND [SEND]

(9) CONNECT POWER METER THROUGH 30 DB OF ATTENUATION TO TACAN RF SAMPLE JACK 2A1J5

(10) VERIFY TACAN OUTPUT POWER IS 3000 WATTS

(11) CONNECT DIGITAL VOLTMETER POSITIVE LEAD TO MODULATION GENERATOR MICROPROCES-

SOR ASSEMBLY 1A2A4 TP2 "G-CAL" AND THE NEGATIVE LEAD TO 1A2A4 TP1 "AGND"

(12) DIGITAL VOLTMETER SHOULD INDICATE +3.0 TO +3.2 VDC

(13) VERIFY THE SAME READING ON THE PC SCREEN OUTPUT POWER WINDO NEW MEASUREMENTS

FRAME IS THE SAME AS THE POWER METER ±200 WATTS. (IF INCORRECT REFER TO

JG 33-45-150 FOR ALIGNMENT).

WORK

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REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 336 DAY ON OUT 1-006

SECTION 1 - INSPECTION REQUIREMENTS

1. MEASURE SYSTEM ATTENUATORS.

A. TEST EQUIPMENT REQUIRED:

(1) 8502A PEAK POWER METER OR EQUIVALENT

(2) APPROPRIATE ATTENUATORS

B. MATERIALS REQUIRED: NONE

C. PROCEDURE:

(1) MEASURE ALL SYSTEM ATTENUATORS AT SITE FREQUENCY, RECORD VALUES IN REMARKS

SECTION OF AN/FRN-45 AFTO 300.

2. MEASURE AND CALCULATE DIRECTIONAL COUPLER LOSS (IAW TO 31R4-2FRN45-2-33JG-1, PARA 3-12-3).

A. TEST EQUIPMENT REQUIRED:

(1) 8502A PEAK POWER METER OR EQUIVALENT

(2) 10DB, 5 WATT ATTENUATOR PAD

B. MATERIALS REQUIRED: NONE

CARD NO. WORK AREA(S) TYPE MECH RQR MECH NO CARD TIME PUBLICATION NUMBER

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1-006 4

WORK

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REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 336 DAY ON OUT 1-006

C. PROCEDURE:

(1) MEASURE POWER VALUES FOR 2J5, RF SAMPLE JACK 2A1J5 AND 2J2 (LOCATED AT THE REAR OF

THE TACAN CABINET); RECORD VALUES IN REMARKS SECTION OF AN/FRN-45 AFTO 300.

(2) CALCULATE ATTENUATION FOR RF SAMPLE 2A1J5 AND 2J2 CABINET RF SAMPLE; RECORD VAL-

UES IN REMARKS SECTION OF AN/FRN-45 AFTO 300.

3. VERIFY FACILITY REFERENCES.

A. TEST EQUIPMENT REQUIRED: NONE

B. MATERIALS REQUIRED: NONE

C. PROCEDURE:

(1) IN THE FCPU PROGRAM SELECT TACAN “SYSTEMS ADJUSTMENT” MENU, SELECT “FACILITY REF-

ERENCE DATA DISPLAY”.

(2) ENSURE ALL FACILITY REFERENCE DATA HAS BEEN ENTERED INTO THE STSTEM AS RECORDED

ON AN/FRN-45 AFTO FORM 300.

4. CHECK AND RECORD FACILITY DATA.

A. TEST EQUIPMENT REQUIRED: NONE

B. MATERIALS REQUIRED: NONE

C. PROCEDURE:

(1) CHECK AND RECORD ALL FACILITY DATA LISTED IN SECTION 1 OF THE AFTO FORM 300 USING

THE MONITOR AND MAINTENANCE DATE SCREENS AND EXISTING FACILITY DATA.

WORK

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INSPECTION

REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 336 DAY ON OUT 1-007

5. MEASURE AND RECORD OUTPUT POWERS.

A. EQUIPMENT REQUIRED:

(1) 8502A PEAK POWER METER OR EQUIVALENT

(2) OSCILLOSCOPE

(3) 10DB, 5 WATT ATTENUATOR PAD AND 20DB, 5 WATT ATTENUATOR PAD

B. MATERIALS REQUIRED: APPROPRIATE ATTENUATORS, CABLES, AND ADAPTERS

C. PROCEDURE:

(1) MEASURE TACAN OUTPUT POWER AT 2A1J5 RF SAMPLE USING 30 DB OF EXTERNAL ATTENUA-

TION. ENSURE VALUE IS WITHIN ± 200 WATTS OF FACILITY REFERENCE; RECORD VALUE

(WATTS AND DBM) IN APPROPRIATE BLOCK ON AN/FRN-45 AFTO FORM 300.

(2) MEASURE 100 WATT AMPLIFIER OUTPUT POWER AT J12 100 WATT SAMPLE USING 30 DB OF

EXTERNAL ATTENUATION. RECORD VALUE (WATTS AND DBM) IN APPROPRIATE BLOCK ON AN/

FRN-45 AFTO FORM 300.

(3) MEASURE 400 WATT AMPLIFIER OUTPUT POWER AT J13 400 WATT SAMPLE USING 10 DB OF

EXTERNAL ATTENUATION. RECORD VALUE (WATTS AND DBM) IN APPROPRIATE BLOCK ON AN/

FRN-45 AFTO FORM 300.

(4) USING OSCILLOSCOPE, MEASURE VIDEO SAMPLE PULSE AT J8. ENSURE PROPER WAVESHAPE

CHARACTERISTICS (PULSE WIDTH, PULSE SPACING, RISE AND FALL TIMES). MEASURE PEAK

AMPLITUDE (DC) FROM GROUND, NOT BASELINE, AND RECORD VALUE IN APPROPRIATE BLOCK

ON AN/FRN-45 AFTO FORM 300.

CARD NO. WORK AREA(S) TYPE MECH RQR MECH NO CARD TIME PUBLICATION NUMBER

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1-007 4

WORK

AREA

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INSPECTION

REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 336 DAY ON OUT 1-007

6. OUTPUT SPECTRUM VERIFICATION (IAW CARD 1-002).

ENSURE SPECTRUM VALUES ARE MEASURED, VERIFIED TO BE IN TOLERANCE, AND BLOCKS ARE

CHECKED ON THE AN/FRN-45 AFTO FORM 300.

7. MODULATION GENERATOR VERIFICATION.

A. EQUIPMENT REQUIRED: DIGITAL MULTIMETER OR EQUIVALENT

B. MATERIALS REQUIRED: NONE

C. PROCEDURE:

(1) VERIFY THE BITE AND NORTH THUMB-WHEEL SETTINGS ARE SET TO REFERENCE. RECORD

SETTINGS ON AN/FRN-45 AFTO FORM 300. RECORD VALUES IN APPROPRIATE BLOCKS OF AFTO

FORM 300.

(2) ENSURE TACAN OUTPUT POWER IS 3000 WATTS ± 200 WATTS.

(3) MEASURE G-CAL VOLTAGE AT 1A2A4J1-8 (POSITIVE) AND TP1 (NEGATIVE).VERIFY 3.1 ± 0.1 VDC.

RECORD VOLTAGE IN APPROPRIATE BLOCKS OF AFTO FORM 300.

8. MONITOR VERIFICATION.

A. EQUIPMENT REQUIRED: NONE

B. MATERIALS REQUIRED: NONE

C. PROCEDURE:

(1) UNDER “TACAN FUNCTIONS”, SELECT “MONITORED DATA”. PRINT AND VERIFY MEASURED VAL- UES FOR MONITOR A AND B ARE WITHIN LIMITS. FILE IN APPROPRIATE SECTION OF FACILITY

REFERENCE BINDER.

(2) UNDER “TACAN FUNCTIONS”, SELECT “MAINTENANCE DATA”. PRINT AND VERIFY MEASURED VALUES FOR MONITOR A AND B ARE WITHIN LIMITS. FILE IN APPROPRIATE SECTION OF FACILITY

REFERENCE BINDER.

WORK

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REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 336 DAY ON OUT 1-008

9. 2A3/2A4 MONITOR LITHIUM BATTERY CHECK.

A. TEST EQUIPMENT REQUIRED: DIGITAL MULTIMETER

B. MATERIALS REQUIRED: NONE

C. PROCEDURE:

(1) EXTEND MONITOR A.

(2) CONNECT NEGATIVE LEAD OF DIGITAL MULTIMETER TO 2A3A9 TP6 (GND).

(3) CONNECT POSITIVE LEAD OF DIGITAL MULTIMETER TO MONITOR CPU 2A3A9 TP1 (+5VDC)

(4) SET MONITOR A CIRCUIT BREAKER 2A3CB1 TO OFF.

(5) OBSERVE THAT DIGITAL MULTIMETER INDICATES +2.2 VDC OR GREATER.

(6) DISCONNECT DIGITAL MULTIMETER FROM MONITOR A.

(7) SET MONITOR BEING CHECKED CIRCUIT BREAKER 2A3CB1 TO ON.

(8) REPEAT STEPS 1 THROUGH 6 FOR 2A4 MONITOR B.

CARD NO. WORK AREA(S) TYPE MECH RQR MECH NO CARD TIME PUBLICATION NUMBER

TO 31R4-2FRN45-6WC-1

1-008 4

WORK

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REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 336 DAY ON OUT 1-008

(9) LOG ON TO VORTAC CONTROL PROGRAM AND SELECT:

a. FROM [BASIC CONTROL] MENU, SELECT [ACKNOWLEDGE ALARM INDICATION].

b. FROM [BASIC CONTROL] MENU, SELECT [RESTORE TRANSMITTER TO SERVICE].

c. FROM [BASIC CONTROL] MENU, SELECT [RESTORE POWER].

(10) RETURN EQUIPMENT TO NORMAL CONFIGURATION.

WORK

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REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 2-001INTRODUCTION

SECTION II - SERVICING AND LUBRICATION

WARNING

• REMOVE ALL POWER FROM VOR CABINET PRIOR TO STARTING THE SERVICING INSPECION. TO ENSURE THAT POWER IS NOT ACCIDENTALLY TURNED ON, PLACE A SIGN MARKED "DO NOT ENER-

GIZE" ON THE POWER DISTRIBUTION PANEL.

• BE AWARE THAT BATTERY VOLTAGES EXIST IN THE MONITOR AND CONTROL-INDICATOR EQUIP-

MENT EVEN WHEN DE-ENERGIZED.

CORROSION PREVENTION AND CONTROL.

CORROSION IS THE DETERIORATION OF MATERIAL BY CHEMICAL OR ELECTRO-CHEMICAL REACTION WITH ITS ENVIRONMENT. INSPECT THE COMPLETE SYSTEM FOR EVIDENCE OF CORROSION. PROCEDURES FOR IDENTIFICATION, ISOLATION AND CONTROL OF CORROSION ARE IDENTIFIED IN THE FOLLOWING TECHNI-

CAL ORDERS.

A. TO 1-1-8 APPLICATION AND REMOVAL OF ORGANIC COATING, AEROSPACE AND NON-AEROSPACE

EQUIPMENT.

CARD NO. WORK AREA(S) TYPE MECH RQR MECH NO CARD TIME PUBLICATION NUMBER

TO 31R4-2FRN45-6WC-1

2-001

WORK

AREA

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REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB INTRODUCTION 2-001

B. TO 1-1-689 ORGANIZATIONAL, UNIT, AND INTERMEDIATE MAINTENANCE, AVIONICS CLEANING, CORROSION PREVENTION/CONTROL

C. TO 31Z-10-37 GENERAL ENGINEERING TECHNICAL MANUAL - CORROSION PREVENTION AND

DETECTION

WORK

AREA

WORK UNIT CODE

INSPECTION

REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 168 DAY OFF OUT 2-002

1. TRANSMITTER FRONT PANEL FILTER CLEANING.

A. TOOLS REQUIRED:

(1) STIFF BRUSH

(2) VACUUM CLEANER

B. PROCEDURE:

(1) REMOVE FILTER FORM FRONT PANEL OF TRANSPONDER 2A2

(2) CLEAN FILTER USING STIFF BRUSH.

(3) USE VACUUM CLEANER TO BLOW OUT REMAINING DIRT FROM FILTER.

(4) SECURE FILTER IN FRONT PANEL OF TRANSPONDER 2A2

(5) RETURN EQUIPMENT TO NORMAL CONFIGURATION

2. TACAN CABINET AND CONTROL-INDICATOR CLEANING.

A. MATERIALS REQUIRED:

(1) LINT-FREE CLOTHS

(2) CLEAN WATER

(3) SOFT BRUSH

(4) VACUUM CLEANER

B. PROCEDURE:

(1) SET MAIN TACAN CIRCUIT BREAKER LOCATED IN THE POWER DISTRIBUTION PANEL TO OFF.

CARD NO. WORK AREA(S) TYPE MECH RQR MECH NO CARD TIME PUBLICATION NUMBER

TO 31R4-2FRN45-6WC-1

2-002

WORK

AREA

WORK UNIT CODE

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ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB 168 DAY OFF OUT 2-002

(2) REMOVE POWER FROM THE CONTROL-INDICATOR, PC, MONITOR, PRINTER AND MODEM

(ASSEMBLIES YOU WILL BE CLEANING)

(3) VACUUM INTERIOR OF ASSEMBLIES BEING CAREFUL NOT TO DAMAGE CIRCUIT CARDS OR

ELECTRONIC COMPONENTS

(4) DAMPEN A LINT-FREE CLOTH WITH CLEAN WATER AND WIPE EXTERIOR SURFACES FREE OF

DUST AND DIRT

(5) SET MAIN CIRCUIT BREAKER TO ON

(6) RETURN SYSTEM TO NORMAL CONFIGURATION

3. ANTENNA INSPECTION.

A. MATERIALS REQUIRED:

(1) DESICANT

(2) HUMIDITY INDICATOR

B. PROCEDURE:

(1) DE-ENERGIZE TACAN TRANSPONDER BY SETTING THE ON/OFF CIRCUIT BREAKER 2A2CB1 AND

THE 65 VOLT ENABLE CIRCUIT BREAKER 2A6CB3 TO THE "OFF" POSITION.

(2) OBSERVE ANTENNA HUMIDITY INDICATOR, IF 70 PERCENT OF RELATIVE HUMIDITY SEGMENT

HAS TURNED PINK IN COLOR, REPLACE DESICANT (TO 31R4-2FRN-41 PARA 6.8.9 FIG 2-3, AND

TABLE 7-1).

(3) RETURN ANTENNA AND TACAN TRANSPONDER TO NORMAL CONFIGURATION.

(4) RETURN MODULATION GENERATOR AND TACAN TRANSPONDER TO NORMAL OPERATING

CONDITION.

WORK

AREA

WORK UNIT CODE

INSPECTION

REQUIREMENTS

ELECTRICAL POWER SERVICE FIGURE CARD NO.

SYS SUB REPAIR RESTRICTIONS 5-001

SECTION V. REPAIR RESTRICTIONS

FIELD LEVEL REPAIR IS RESTRICTED TO REPLACEMENT OF LINE REPLACEMENT UNITS (LRU'S) IN MOST CASES

LRU'S ARE CIRCUIT CARDS, MODULES AND OTHER ASSEMBLIES DESIGNED TO BE REPLACED AS AN ENTIRE

UNIT, NO FIELD LEVEL REPAIRS ARE AUTHORIZED ON LRU'S.

CARD NO. WORK AREA(S) TYPE MECH RQR MECH NO CARD TIME PUBLICATION NUMBER

TO 31R4-2FRN45-6WC-1

5-001