31R4-2FRN45-2-33FI-1.pdf

TO 31R4-2FRN45-2-33FI-1

15 OCTOBER 2004 Change 1 14 FEBRUARY 2012

TECHNICAL MANUAL

ORGANIZATIONAL MAINTENANCE

FAULT ISOLATION

TACAN NAVIGATIONAL SET

AN/FRN-45

PN 880199

CARDION ELECTRONICS, INC.

F04606-82-C-0348

THIS PUBLICATION SUPERSEDES TO 31R4-2FRN45-2-33FI-1, DATED 28 JANUARY 1999, BASIC AND ALL CHANGES.

DISCLOSURE NOTICE – This information is furnished upon the condition that it will not be released to another nation without the specific authority of the Department of the Air Force of the United States, that it will be used for military purposes only, that individual or corporate rights originating in the information, whether patented or not, will be respected, that the recipient will report promptly to the United States, any known or suspected compromise, and that the information will be provided substantially the same degree of security afforded it by the Department of Defense of the United States. Also, regardless of any other markings on the document, it will not be downgraded or declassified without written approval of the originating United States agency.

DISTRIBUTION STATEMENT D - Distribution authorized to Department of Defense and U.S. DoD contractors only. Due to critical technology (14 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

*Zero in this column indicates an original page

A Change 1 USAF

NOTE: The portion of the text affected by the change is indicated by a vertical line in the outer margins of the page. Changes to illustrations are indicated by miniature pointing hands. Changes to wiring diagrams are indicated by shaded or screened areas.

TOTAL NUMBER OF PAGES IN THIS MANUAL IS 122, CONSISTING OF THE FOLLOWING:

Title A i - vi 1-1 - 1-2 2-1 - 2-8 3-1 - 3-28 4-1 - 4-4 5-1 - 5-4

6-1 - 6-7 6-8 Blank 6-9 - 6-29 6-30 Blank 7-1 - 7-5 7-6 Blank 7-7 - 7-16 8-1 - 8-3

8-4 Blank 8-5 - 8-12 9-1 9-2 Blank 9-3 9-4 Blank 9-5 - 9-6 A-1 - A-4

Dates of issue for original and changed pages are:

Original . . . . . . . . . . . . . . . . 0 . . . . . .15 October 2004 Change. . . . . . . . . . . . . . . . . 1 . . . . . . 14 February 2012

Page No.

*Change No.

Page No

*Change No.

Page No.

*Change No.

INSERT LATEST CHANGED PAGES. DESTROY SUPERSEDED PAGES.LIST OF EFFECTIVE PAGES

TO 31R4–2FRN45–2–33FI–1

i

TABLE OF CONTENTS

Chapter Title Page

Introduction......................................................................................................................................... iv

1. General Information ............................................................................................................................ 1–1

2. Description .......................................................................................................................................... 2–1

3. TACAN Navigational Set (33–00–000).............................................................................................. 3–1

4. Antenna (33–10–000).......................................................................................................................... 4–1

5. Power Supply (33-20-000) .................................................................................................................. 5–1

6. Transponder (33-30-000) .................................................................................................................... 6–1

6. Radio Frequency Monitor A/B (33-40-000)........................................................................................ 7–1

8. Control Indicator (33-50-000)............................................................................................................. 8–1

9. Automatic Data Processing (33-60-000) ............................................................................................. 9–1

Appendix A TACAN Reference Designator – S/S/SN Cross Reference................................................................. A–1 ii

LIST OF ILLUSTRATIONS

Figure Title Page

1–1 TACAN Navigational Set ................................................................................................................... 1–2

3–1 TACAN Navigational Set Component Location Information............................................................. 3–2

4–1 Antenna Component Location Information......................................................................................... 4–2

5–1 Power Supply Component Location Information................................................................................ 5–2

6–1 Transponder Component Location Information .................................................................................. 6–2

7–1 Radio Frequency Monitor A/B Component Location Information ..................................................... 7–2

8–1 Control Indicator Component Location Information........................................................................... 8–2 iii

LIST OF TABLES

Table Title Page

2–1 TACAN Navigational Set Fault Code Index....................................................................................... 2–2

2–2 PC Fault Code Index. .......................................................................................................................... 2–4

8–1 Control Indicator Fault Analysis Table ............................................................................................... 8–12

9–1 Personal Computer Fault Analysis ...................................................................................................... 9–6 iv

INTRODUCTION

1. PURPOSE. This manual provides organizational maintenance instructions for the TACAN Navigational Set.

The Fault Isolation (FI) manual is used in conjunction with the Job Guide (JG) manual and Schematic Diagram (SD), as applicable. This FI provides fault identification, description, and isolation procedures for the TACAN Navigational Set.

2. SCOPE. This manual provides technical information required to fault isolate a detected fault within the system.

Each fault isolation procedure terminates with fault correction or reference to a schematic diagram or another system fault isolation section for further fault analysis.

3. The system failure information contained in this manual is based upon malfunction analysis of equipment as delivered. Failure information gained from experience will be added to this manual as the information becomes available.

NOTE

The effectiveness of this FI manual after initial distribution to the user, to a large extent, is dependent upon operations and maintenance personnel who are active participants in the program and who are actually using this manual.

4. ARRANGEMENT OF THIS MANUAL. This manual contains front matter and sections as follows:

FRONT MATTER -The front matter consists of title page, list of effective pages, table of contents, list of illustrations, alphabetical index, and introduction containing purpose, scope, arrangement, use, nonstandard abbreviations, change recommendations, record of applicable time compliance technical orders (TCTO’s), and safety summary.

EACH SECTION - Provides fault identification and description, access and locator data, fault isolation, and supplemental data for each system and is arranged as follows:

Fault Identification and Description

Access and Locator Data

Fault Isolation Procedures

Supplemental Data

5. USE OF THIS MANUAL. Section one contains procedures for collecting initial fault isolation data. The data collected is used with tables in Section two to select proper identification and description flow charts contained in sections three through nine.

Section two contains fault isolation code tables. The fault code elements are broken down in this section.

Sections three through nine contain general and specific fault identification and description flow charts. These charts are used to isolate faults to specific LRU. Illustrations of component locations and test points are also provided.

The user will find the fault isolation procedure for the required fault code on the appropriate fault isolation flow chart. Each fault code is followed by a series of action instructions contained in rectangular blocks with the monitored results of the actions outside the blocks. These actions terminate with instructions for further fault analysis or repair.

The action blocks also contain any required reference to locator data, job guide function or schematic diagrams (SD) in parenthesis. One isolation procedure may be used for several coded faults in order to reduce redundancy.

When supplemental data is required to support fault isolation procedures, additional information is provided in the form of tables, written text, and/ or supporting illustrations. This information is included in each applicable section.

6. NONSTANDARD ABBREVIATION. The following nonstandard abbreviations are used in this manual: NONE.

7. CHANGE RECOMMENDATIONS. Recommendations concerning changes to this FI shall be submitted IAW T.O.

00-5-1.

8. RECORD OF APPLICABLE TIME COMPLIANCE

TECHNICAL ORDERS (TCTO’S). The following chart sets forth the TCTO’s that are applicable to the fault reporting codes in this manual:

v

TCTO Number Title TCTO Date

31R4-2-509 Modification to Install Limited Transmitter Engineering Change Proposal (ECP-27), Power Conversion Engineering Change Proposal (ECP-3O), Power Jack Engineering Change Proposal (ECP-31), and On Request Mode Engineering Change Proposal (ECP-32) for AN/FRN-45 TACAN Navigational Set

1 Nov 90

31R4-2-510 Modification to Install 700 Watt Test Point Engineering Change Proposal (ECP-34) for AN/FRN-45 TACAN Navigational Set

1 Nov 90

31R4-2-511 Modification to Install Audio Engineering Change Proposal (ECP-

22) and Power Monitor Display Assembly (Part of ECP-25) for AN/FRN-45 TACAN Navigational Set

1 Nov 90

31R4-2FRN45-501 Modification to Install Burst/Ident Sync Generator Engineering Change Proposal (ECP-43) for AN/FRN-45 TACAN Navigational Set

1 Apr 97

31R4-2FRN45-502 Modification to Install Front Panel Test Points on the AN/FRN-45 TACAN Navigational Set

16 Apr 98

31R4-2FRN45-503 Modification to Install a Second +65 Volt Path for 700-Watt Amplifiers on the AN/FRN-45 TACAN Navigational Set

1 Feb 99

31R4-2FRN45-504 Modification to Install Upgraded EPROMS in the RF Monitors for the AN/FRN-45 TACAN

1 May 99

31R4-2-FRN45-505 Inspection of Frequency Synthesizer Modules in AN/FRN-45 TACAN Systems

1 Apr 02

31R4-2-FRN45-506 Inspection of TACAN Navigational Set AN/FRN-45 Power Supply, Part Number 105324

21 May 02

31R4-2FRN45-507 Modification to replace FCPU with Personal Computer 1 Sep 03 vi

9. SAFETY SUMMARY. General safety notices:

Keep Away From Live Circuits. Always observe safety rules.

Do not repair the equipment when the power is on, unless necessary. Always turn off the power before touching any circuits. Before making adjustments remove all jewelry. make adjustments with one hand and keep the other away from the equipment.

Do Not Service or Adjust Alone. Do not enter an area to service or adjust the equipment at any time unless another person is present.

Resuscitation. Anyone working with or near high voltages should know modern methods of resuscitation. These methods may be learned at the base hospital or at local medical facilities and T.O. 31-1-141-1.

First Aid. Seek medical help immediately after injury. Any injury, however slight, should be treated.

WARNINGS AND CAUTIONS

Ensure that all circuit breakers and power switches mounted on or connected to transponder group are OFF before checking wiring connections.

Use extreme care when working with the transponder group, transponder and radio frequency amplifier. Careless handling of metal tools can short out the 65 VDC, 25 ampere power source and result in death or serious injury. Before removing or installing any equipment in the rack, turn off all external power sources to the Transponder Group.

Lead soldering generates lead oxide fumes.

Avoid breathing the fumes generated by soldering. Do not flip solder off the soldering iron. The hot solder can cause severe burns.

Voltage measurements are taken with respect to +65 VDC. If an oscilloscope or AC powered instrument is used, the instrument must be isolated from AC ground or damage to the equipment will result

Electrostatic discharge sensitive (ESDS) devices are used in this assembly. Static electricity can damage these devices. Special handling methods and materials must be used to pre-vent damage. Do not touch or remove any ESDS device or any assembled circuit board that has an ESDS device without properly grounding your body, test equipment, and all tools. Be thoroughly familiar with the handling procedures specified in T.O. 00-25-234 and T.O. 31-1-141-1. Move or store assembled circuit boards only in conductive (anti-static) bags. Do not touch the printed circuits or the connector pins on the board; handle the board by the edges only. Keep the pins of an ESDS device shorted together whenever possible; use a device shorting bus, a shorting tube, or conductive foam.

Avoid excessive bending of semi rigid cables, otherwise they may be permanently damaged.

Ensure that the transponder group antenna connector is connected to an antenna or high power termination prior to performing any of the following tests.

1-1

CHAPTER 1

GENERAL INFORMATION

1.1 GENERAL.

This section contains general information that pertains to the entire TACAN Navigational Set. Figure 1-1 illustrates the TACAN equipment and its location relative to the site. For a further explanation of the TACAN Navigational Set, refer to

GE 33-00-000.

1.2 PERSONAL COMPUTER FAULT DATA

COLLECTION.

To observe fault data obtained during self check, perform the following steps.

a. Log-on to PC.

b. Select [Fault Diagnostics], [Initiate Self-Check] and observe fault data on the system status window..

d. Refer to PC Fault Code Index (Table 2-2) and/or Fault Code 33-00-000 A1ZZZ.

1.3 TACAN FAULT DATA COLLECTION.

Use the following procedure to collect the TACAN fault data.

a. Log-on to PC.

b. Verify [Computer Control], [Fault Data Collection] checkbox is selected.

c. Select [Fault Diagnostics] and [Display Current Fault Data].

d. Select [Monitored Data].

e. Select [Fault Diagnostics], [Acknowledge Alarm Indication], [Basic Control], [Restore Transmitter to Service] and [Restore Power].

NOTE

When performing fault isolation requiring use of data from the monitors (Maintenance/Monitor Data, etc.), compare data from both monitors to ensure they agree.

If data from monitors is not in agreement then a monitoring problem is indicated.

f. Allow unit to stabilize for approximately 60 seconds.

g. Note NOR/NOR status on PC screen after the stabilization period.

h. Select [Maintenance Data].

i. Note and verify that readings are within tolerance.

j. Select [Monitored Data]. Read all TACAN monitored data.

k. Note and verify that readings are within tolerance Data.

l. Select [Fault Diagnostics] and [Initiate Self-Check].

m. Verify “Test Passed” indication.

n. If steps g through m have been satisfactorily performed, unit has passed checkout.

o. Refer to Fault Code Index (Table 2-1 and 2-2) and/or Fault Code 33-00-000 A1ZZZ.

1-2

Figure 1-1. TACAN Navigational Set

2-1

CHAPTER 2

DESCRIPTION

2.1 Fault Code.Description.

The following paragraph contains a description of the fault code system as used in this manual.

The fault code is broken down as follows.

Sub/Subsystem:

Power Supply

Fault identifier

Control

Subsystem:

Power Supply

System: TACAN Navigation Set

A1ZZZ - - - 100

2.1.1 Table 2–1 contains a complete fault code index for the

TACAN Navigational Set.

2.1.2 Table 2–2 contains a complete PC fault code index for

the TACAN Navigational Set.

2-2

Table 2–1. TACAN Navigational Set Fault Code Index

Fault Fault Code

AC Power Loss 33-00-000 G1ZZZ

AGR Blanking 33-35-000 C1ZZZ

Alarm Does Not Silence (Remote Control Unit) 33-50-000 D1ZZZ

Amplitude/Shape Controller Fault 33-35-140 A1ZZZ

Antenna Scan Rate Failure 33-45-000 A1ZZZ

Both TACAN On And Off/Bypass Status Lamps Are Off 33-50-000 C1ZZZ

Both TACAN On And Off/Bypass Status Lamps Are On 33-50-000 C1ZZZ

Channel X/Y Status 33-35-000 A1ZZZ

CODEC Card Assembly Failure (Remote Control Unit) 33-50-100 A1ZZZ

Communications Fault 33-45-000 B1ZZZ

Communications Interface 33-60-110 A1ZZZ

Control Indicator Has No Control 33-50-000 E1ZZZ

Control Indicator Interface Failure 33-35-100 A1ZZZ

Control Indicator Power Supply Failure 33-50-110 A1ZZZ

CW Output Level Failure 33-45-000 C1ZZZ

Dead Time Gate Fault 33-35-000 D1ZZZ

Personal Computer Inoperative 33-60-000 A1ZZZ

Directional Coupler Failure 33-37-180 A1ZZZ

Echo Suppression Gate Fault 33-35-000 E1ZZZ

EMI Filter Failure 33-00-000 E1ZZZ

Frequency Synthesizer Failure 33-45-220 A1ZZZ

HPA Failure 33-37-000 A1ZZZ

Lamp Dim Control Inoperative (Remote Control Unit) 33-50-000 D1ZZZ

Modulator Detector Failure 33-45-240 A1ZZZ

Monitor Multiplexer Failure 33-45-150 A1ZZZ

Monitor Voltage Regulator Failure 33-45-200 A1ZZZ

No ID At Remote Control Unit 33-50-000 F1ZZZ

No TACAN Indication 33-00-000 L1ZZZ

Output Power Fault 33-00-000 F1ZZZ

2-3

Table 2–1. TACAN Navigational Set Fault Code Index – Continued

Fault Fault Code

Password Initiate Fault 33-00-000 H1ZZZ

Power Circuit Breaker CB1 Will Not Remain On (Remote Control Unit) 33-50-000 A1ZZZ

Power Lamp Does Not Light (Remote Control Unit) 33-50-000 B1ZZZ

Processed Triggers Fault 33-35-000 B1ZZZ

Programmable Echo Level Failure 33-35-120 A1ZZZ

RANTEC Antenna Failure 33-16-000 A1ZZZ

Receiver Failure 33-35-230 A1ZZZ

Restored Video Fault 33-35-000 F1ZZZ

Serial Interface Error 33-35-130 A1ZZZ

Speaker Volume Control Inoperative (Remote Control Unit) 33-50-000 D1ZZZ

TACAN Ident Fault 33-00-000 R1ZZZ

TACAN Maintenance Data Dead Time Gate Fault 33-00-000 V1ZZZ

TACAN Maintenance Data Frequency 33-00-000 U1ZZZ

TACAN Maintenance Data Pulse Width, Rise And Fall Time Fault 33-00-000 X1ZZZ

TACAN Maintenance Data Receiver Sens. (All) Fault 33-00-000 W1ZZZ

TACAN Monitor CPU Malfunction 33-00-000 Y1ZZZ

TACAN Monitor Data Antenna Rotation Fault 33-00-000 P1ZZZ

TACAN Monitor Data Auxiliary Ref. Burst Fault 33-00-000 K1ZZZ

TACAN Monitor Data Efficiency 33-00-000 C1ZZZ

TACAN Monitor Data North Ref. Burst Fault 33-00-000 J1ZZZ

TACAN Monitor Data Pulse Rate 33-00-000 D1ZZZ

TACAN Monitor Data Pulse Spacing 33-00-000 B1ZZZ

TACAN Monitor Data, Reply Delay Fault 33-00-000 T1ZZZ

TACAN Monitor Status Fault 33-00-000 S1ZZZ

TACAN Navigational Set Inoperative 33-00-000 A1ZZZ

TACAN Power Supply Has No DC Voltages 33-26-000 A1ZZZ

Transponder Power Supply Regulator 33-35-220 A1ZZZ

100 Watt Power Amplifier Failure 33-35-250 A1ZZZ

400 Watt Power Amplifier Failure 33-35-190 A1ZZZ

Table 2-2. PC Fault Code Index.

PC Fault Code

Test

Corrective Action

NOTE

Fault codes other than those listed indicate multiple test failures. For additional information on PC fault codes, refer to GS 33-60-000.

Monitor Faults

Monitor A Monitor B Transponder PS 1 - - - - - - - - - - - / 1 - - - - - - - - - - - / - - - - - - - - - - / - 2 - - - - - - - - - - - / 2 - - - - - - - - - - - / - - - - - - - - - - / - 4 - - - - - - - - - - - / 4 - - - - - - - - - - - / - - - - - - - - - - / - 8 - - - - - - - - - - - / 8 - - - - - - - - - - - / - - - - - - - - - - / -

- 1 - - - - - - - - - - / - 1 - - - - - - - - - - / - - - - - - - - - - / -

- 2 - - - - - - - - - - / - 2 - - - - - - - - - - / - - - - - - - - - - / -

- 4 - - - - - - - - - - / - 4 - - - - - - - - - - / - - - - - - - - - - / -

- 8 - - - - - - - - - - / - 8 - - - - - - - - - - / - - - - - - - - - - / -

- - 1 - - - - - - - - - / - - 1 - - - - - - - - - / - - - - - - - - - - / -

- - 2 - - - - - - - - - / - - 2 - - - - - - - - - / - - - - - - - - - - / -

- - 4 - - - - - - - - - / - - 4 - - - - - - - - - / - - - - - - - - - - / -

- - 8 - - - - - - - - - / - - 8 - - - - - - - - - / - - - - - - - - - - / -

- - - 1 - - - - - - - - / - - - 1 - - - - - - - - / - - - - - - - - - - / -

- - - 2 - - - - - - - - / - - - 2 - - - - - - - - / - - - - - - - - - - / -

- - - 4 - - - - - - - - / - - - 4 - - - - - - - - / - - - - - - - - - - / -

- - - 8 - - - - - - - - / - - - 8 - - - - - - - - / - - - - - - - - - - / -

- - - - 1 - - - - - - - / - - - - 1 - - - - - - - / - - - - - - - - - - / -

- - - - 2 - - - - - - - / - - - - 2 - - - - - - - / - - - - - - - - - - / -

- - - - 4 - - - - - - - / - - - - 4 - - - - - - - / - - - - - - - - - - / -

- - - - 8 - - - - - - - / - - - - 8 - - - - - - - / - - - - - - - - - - / -

Master Counter Check Serial Control on Time Base Interface

1.5625 kHz vs CPU Clock

1.0 kHz vs CPU Clock Synthesizer Write Test ITG Pulse Test Synthesizer Lock ID Monitor Power Monitor Selected Reply Trigger Generator CW Output Level Monitor Synthesizer Level Monitor Voltage Regulator Assy.

Timing Pulse Generator CPU RAM Check Half Amplitude Check Pulse Characteristic Circuit CPU ROM Check Not used

Replace 33–45–120 Replace 33–45–190 Replace 33–45–190 Replace 33–45–190 Replace 33–45–160 Replace 33–45–160

33–45–220 A1ZZZ

Replace 33–45–130 Replace 33–45–150 Replace 33–45–150

33–45–000 C1ZZZ

33–45–220 A1ZZZ

Replace 33–45–200 Replace 33–45–130 Replace 33–45–180 Replace 33–45–150

33–00–000 X1ZZZ

Replace 33–45–180

TO

31R

4-2FR

N

45-2-33FI-1

2-4

Table 2-2. PC Fault Code Index. - Continued

Monitor Faults continued

- - - - - 1 - - - - - - / - - - - - 1 - - - - - - / - - - - - - - - - - / -

- - - - - 2 - - - - - - / - - - - - 2 - - - - - - / - - - - - - - - - - / -

- - - - - 4 - - - - - - / - - - - - 4 - - - - - - / - - - - - - - - - - / -

- - - - - 8 - - - - - - / - - - - - 8 - - - - - - / - - - - - - - - - - / -

- - - - - - 1 - - - - - / - - - - - - 1 - - - - - / - - - - - - - - - - / -

- - - - - - 2 - - - - - / - - - - - - 2 - - - - - / - - - - - - - - - - / -

- - - - - - 4 - - - - - / - - - - - - 4 - - - - - / - - - - - - - - - - / -

- - - - - - 8 - - - - - / - - - - - - 8 - - - - - / - - - - - - - - - - / -

- - - - - - - 1 - - - - / - - - - - - - 1 - - - - / - - - - - - - - - - / -

- - - - - - - 2 - - - - / - - - - - - - 2 - - - - / - - - - - - - - - - / -

- - - - - - - 4 - - - - / - - - - - - - 4 - - - - / - - - - - - - - - - / -

- - - - - - - 8 - - - - / - - - - - - - 8 - - - - / - - - - - - - - - - / -

- - - - - - - - 1 - - - / - - - - - - - - 1 - - - / - - - - - - - - - - / -

- - - - - - - - 2 - - - / - - - - - - - - 2 - - - / - - - - - - - - - - / -

- - - - - - - - 4 - - - / - - - - - - - - 4 - - - / - - - - - - - - - - / -

- - - - - - - - 8 - - - / - - - - - - - - 8 - - - / - - - - - - - - - - / -

- - - - - - - - - 1 - - / - - - - - - - - - 1 - - / - - - - - - - - - - / -

- - - - - - - - - 2 - - / - - - - - - - - - 2 - - / - - - - - - - - - - / -

- - - - - - - - - 4 - - / - - - - - - - - - 4 - - / - - - - - - - - - - / -

- - - - - - - - - 8 - - / - - - - - - - - - 8 - - / - - - - - - - - - - / -

- - - - - - - - - - 1 - / - - - - - - - - - - 1 - / - - - - - - - - - - / -

- - - - - - - - - - 2 - / - - - - - - - - - - 2 - / - - - - - - - - - - / -

- - - - - - - - - - 4 - / - - - - - - - - - - 4 - / - - - - - - - - - - / -

- - - - - - - - - - 8 - / - - - - - - - - - - 8 - / - - - - - - - - - - / -

- - - - - - - - - - - 1 / - - - - - - - - - - - 1 / - - - - - - - - - - / -

- - - - - - - - - - - 2 / - - - - - - - - - - - 2 / - - - - - - - - - - / -

- - - - - - - - - - - 4 / - - - - - - - - - - - 4 / - - - - - - - - - - / -

- - - - - - - - - - - 8 / - - - - - - - - - - - 8 / - - - - - - - - - - / -

CCCCCCCCCCCC/CCCCCCCCCCCC / - - - - - - - - - - / -

MMMMMMMMMMMM/MMMMMMMMMMMM / - - - - - - - - - - / -

Not used Not used Not used Reply Window Generator Not used Rotation Parameter Faulted Power Parameter Faulted Receiver Sensitivity Fault ID Parameter Faulted Efficiency Parameter Faulted Rate Parameter Faulted Burst Parameter Faulted

AMT Rate AMT Efficiency AMT Spacing AMT Delay AMT 135 Hz Azimuth AMT 15 Hz Azimuth AMT Power Not used Not used AMT Rotation Rate AMT Aux. Burst AMT North Burst Not used Not used Not used Not used Monitor Communications Fault Monitor CPU Malfunction

33–00–000 A1ZZZ

33–00–000 P1ZZZ

33–00–000 F1ZZZ

33–00–000 W1ZZZ

33–00–000 R1ZZZ

33–00–000 C1ZZZ

33–00–000 D1ZZZ

33–00–000 J1ZZZ

33–00–000 K1ZZZ

Replace 33–45–120 Replace 33–45–120 Replace 33–45–130 Replace 33–45–130 Replace 33–45–110 Replace 33–45–110 Replace 33–45–150

Replace 33–45–110

33–00–000 K1ZZZ

33–00–000 J1ZZZ

33-45-000 B1ZZZ

33-00-000 Y1ZZZ

4-2FR

N

2-5

Table 2-2. PC Fault Code Index. - Continued

Transponder Faults

- - - - - - - - - - - -/ - - - - - - - - - - - - / 1 - - - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / 2 - - - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / 4 - - - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / 8 - - - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - 1 - - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - 2 - - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - 4 - - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - 8 - - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - - 1 - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - - 2 - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - - 4 - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - - 8 - - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - - - 1 - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - - - 2 - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - - - 4 - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - - - 8 - - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - - - - 1 - - - - - / -

- - - - - - - - - - - -/ - - - - - - - - - - - - / - - - - 2 - - - - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - 4 - - - - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - 8 - - - - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - 1 - - - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - 2 - - - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - 4 - - - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - 8 - - - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - 1 - - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - 2 - - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - 4 - - - / -

Not Used Receiver Video Serial Interface Error Transponder Regulator Assembly Not used Not used Not used Not used Processed Triggers Channel X or Y Status TACAN ID Fault AGR Blanking 1350 Hz Fault Echo Suppression Gate Fault Dead Time Gate Fault 20 MHz Fault Interrogation Overload Synthesizer Lock Restored Video Fault

1.5625 Khz Fault

400w Amp Fault 100w Amp Fault Amplitude/Shape Controller Fault Echo Disable Fault Ident Audio Fault Burst Gate Ident Fault Burst Gate Triggers Fault

33–35–230 A1ZZZ

33–35–130 A1ZZZ

33–35–220 A1ZZZ

33–35–000 B1ZZZ

33–35–000 A1ZZZ

33–00–000 R1ZZZ

33–35–000 C1ZZZ

Replace 33–35–170

33–35–000 E1ZZZ

33–35–000 D1ZZZ

Replace 33–35–170 Replace 33–35–120 Replace 33–35–240

33-35-000 F1ZZZ

Replace 33–35–150

33–35–190 A1ZZZ

33–35–250 A1ZZZ

33–35–140 A1ZZZ

33–35–120 A1ZZZ

33–00–000 R1ZZZ

33–00–000 R1ZZZ

33–00–000 J1ZZZ

33–00–000 K1ZZZ

4-2FR

N

2-6

Table 2-2. PC Fault Code Index - Continued

Transponder Faults continued

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - 8 - - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - 1 - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - 2 - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - 4 - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - 8 - - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - 1 - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - 2 - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - 4 - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - 8 - / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - - 1 / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - - 2 / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - - 4 / -

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - - 8 / -

On Channel Video Fault Control–Indicator Receive Fault Control–Indicator Transmit Fault HPA Module #5 Fault HPA Module #6 Fault HPA Module #7 Fault HPA Module #8 Fault HPA Module #1 Fault HPA Module #2 Fault HPA Module #3 Fault HPA Module #4 Fault Transponder Data Fault

33–35–230 A1ZZZ

33–50–100 A1ZZZ

33–35–100 A1ZZZ

33–37–000 A1zzz

33–37–000 A1ZZZ

33–37–000 A1ZZZ

33–37–000 A1ZZZ

33–37–000 A1ZZZ

33–37–000 A1ZZZ

33–37–000 A1ZZZ

33–37–000 A1ZZZ

33-45-000 B1ZZZ

4-2FR

N

2-7

Table 2-2. PC Fault Code Index – Continued

Power Supplies Faults

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - - - / 1

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - - - / 2

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - - - / 4

- - - - - - - - - - - - / - - - - - - - - - - - - / - - - - - - - - - - / 8

Main Power Supply Monitor B Power Supply Monitor A Power Supply Not used

33-26-000 A1ZZZ

Replace 33-45-200 Replace 33-45-200

Personal Computer Fault

TACAN Monitor B Communications Port.

TACAN Monitor A Communications Port.

PC Analog Card Failure PC Digital Card Failure

33-60-110 A1ZZZ

33-60-110 A1ZZZ

Replace Analog Card Replace Digital Card

4-2FR

N

2-8

3-1

CHAPTER 3.

FAULT IDENTIFICATION AND DESCRIPTION

TACAN NAVIGATIONAL SET (33–00–000)

TACAN SET FAULTS FAULT CODE

1. TACAN NAVIGATIONAL SET INOPERATIVE 33-00-000 A1ZZZ

2. TACAN MONITOR DATA PULSE SPACING 33-00-000 B1ZZZ

3. TACAN MONITOR DATA EFFICIENCY 33-00-000 C1ZZZ

4. TACAN MONITOR DATA PULSE RATE 33-00-000 D1ZZZ

5. EMI FILTER FAILURE 33-00-000 E1ZZZ

6. OUTPUT POWER FAULT 33-00-000 F1ZZZ

7. AC POWER LOSS 33-00-000 G1ZZZ

8. PASSWORD INITIATE FAULT 33-00-000 H1ZZZ

9. TACAN MONITOR DATA NORTH REF. BURST FAULT 33-00-000 J1ZZZ

10. TACAN MONITOR DATA AUXILIARY REF. BURST FAULT 33-00-000 K1ZZZ

11. NO TACAN INDICATION 33-00-000 L1ZZZ

12. TACAN MONITOR DATA ANTENNA SCAN RATE FAULT 33-00-000 P1ZZZ

13. TACAN IDENT FAULT 33-00-000 R1ZZZ

14. TACAN MONITOR STATUS FAULT 33-00-000 S1ZZZ

15. TACAN MONITOR DATA, REPLY DELAY FAULT 33-00-000 T1ZZZ

16. TACAN MAINTENANCE DATA FREQUENCY 33-00-000 U1ZZZ

18. TACAN MAINTENANCE DATA DEAD TIME GATE FAULT 33-00-000 V1ZZZ

19. TACAN MAINTENANCE DATA RECEIVER SENS. 33-00-000 W1ZZZ

(All) FAULT

20. TACAN MAINTENANCE DATA PULSE WIDTH, RISE AND 33-00-000 X1ZZZ

FALL TIME FAULT

21. TACAN MONITOR CPU MALFUNCTION 33-00-000 Y1ZZZ

33-00-000

3-2

Figure 3-1. TACAN Navigational Set Component Location Information (Sheet 1 of 6).

3-3

Figure 3-1. TACAN Navigational Set Component Location Information (Sheet 2).

3-4

Figure 3-1. TACAN Navigational Set Component Location Information (Sheet 3).

3-5

Figure 3-1. TACAN Navigational Set Component Location Information (Sheet 4).

3-6

Figure 3-1. TACAN Navigational Set Component Location Information (Sheet 5).

3-7

Figure 3-1. TACAN Navigational Set Component Location Information (Sheet 6)

3-8

A1ZZZ

33-00-000 TACAN NAVIGATIONAL SET INOPERATIVE

FAULT CODE FAULT ISOLATION

IS PERSONAL COMPUTER INOPERATIVE

IS CONTROL INDICATOR INOPERATIVE

No

IS PRINTER INOPERATIVE

A1ZZZ

33-00-000

CORRECTIVE ACTION

Yes

No

Yes

AC POWER LOSS/NO RACK DC VOLTAGES

No

Yes

REFER TO PRINTER MANUAL

Yes

REFER TO FAULT CODE 33-00-000 G1ZZZ

No

REFER TO FAULT CODE 33-16-000 A1ZZZRADIATED POWER, AZIMUTH FAULTS

1. ANALYZE DISPLAYED FAULT DATA

2. REFER TO SUPPLEMENTAL DATA

RETURN TO SERVICE

1. PERFORM SYSTEM FAULT ISOLATION

PROCEDURE( REFER TO SUPPLEMENTAL

DATA PARAGRAPH 3-1)

2. ARE THERE ANY FAULTS

No

1. SELECT MASTER MENU ITEM HG FOR

COMPUTER SELF CHECK

2. DOES SELF CHECK PASS

Yes

No

Yes

REFER TO FAULT CODE 33-60-000 A1ZZZ

REFER TO FAULT CODE INDEX FI 33-50-000

A1ZZZ

Yes

No

REFER TO FAULT CODE INDEX TABLES 2-1 AND

2-2

3-9

1. SELECT MASTER MENU ITEM IB AND INPUT

ASSIGNED CHANNEL

2. SELECT MASTER MENU ITEM EB TO RESTORE

TRANSPONDER TO SERVICE

3. COMPARE PULSE SPACING FROM BOTH

MONITORS

4. DO BOTH MONITORS HAVE SATISFACTORY

PULSE SPACING

B1ZZZ

33-00-000 TACAN MONITOR DATA PULSE SPACING

FAULT CODE FAULT ISOLATION

DO MONITORS AGREE

1. REPLACE TRANSPONDER ENCODER 2A2A8

(REFER TO JG 33-00-001)

2. ALIGN TRANSPONDER ENCODER 2A2A8

(REFER TO JG 33-35-170)

3. DOES PROBLEM STILL EXIST

Yes

No

B1ZZZ

33-00-000

CORRECTIVE ACTION

No

RETURN TO SERVICEYes

REFER TO SUPPLEMENTAL DATA

PARAGRAPH 3-4

Yes

IS SIGNAL PRESENT AT RADIO FREQUENCY

MONITOR A/B MONITOR MULTIPLEXER 2A3/2A4A6

TP10 (REFER TO SD 33-45-150)

No

IS SIGNAL AT TRANSPONDER ENCODER 2A2A8

TP9 CORRECT (REFER TO SD 33-35-170)

Yes

1. SELECT MASTER MENU ITEM HE FOR SELF

CHECK

2. ANALYZE FAULT DATA

3. REFER TO SUPPLEMENTAL DATA

RETURN TO SERVICENo

Yes

No

1. REPLACE RADIO FREQUENCY MONITOR A/B

MONITOR MULTIPLEXER 2A3/2A4A6

(REFER TO JG 33-00-001)

2. ALIGN MONITOR A/B MONITOR MULTIPLEXER

2A3/2A4A6 (REFER TO JG 33-45-150)

3. DOES PROBLEM STILL EXIST

No RETURN TO SERVICE

1. SELECT MASTER MENU ITEM HE FOR SELF

CHECK

2. ANALYZE FAULT DATA

3. REFER TO SUPPLEMENTAL DATA

Yes

3-10

3-11

3-12

3-13

3-14

3-15

3-16

3-17

3-18

3-19

3-20

3-21

3-22

3-23

3-24

3-25

3-26

3-27

3-28

SUPPLEMENTAL DATA

3.1 TACAN SYSTEM CHECK USING DAPS.

The following procedure shall be used as part of Fault Code

33-00-000 A1ZZZ

NOTE

If transponder shuts off or the unit does not perform properly in any of the tests set forth, the system check is considered to have failed.

Refer to Fault Code 33-00-000 A1ZZZ.

a. Set TACAN equipment rack circuit breakers to ON position.

b. Select [Basic Control] and [Acknowledge Alarm Indication].

c. Allow unit to stabilize for approximately 60 seconds.

d. Note NOR/NOR status on System Status Window after the stabilization period.

NOTE

When performing fault isolation requiring use of data from the monitors (Maintenance/Monitor Data, etc.), compare data from both monitors to ensure they agree.

If data from monitors is not in agreement then a monitoring problem is indicated.

e. Select [Maintenance Data].

f. Note and verify that readings are within tolerance.

g. Select [Monitored Data]. Read all TACAN monitored data.

h. Note and verify that readings are within tolerance.

i. Select [Fault Diagnostics] and [Initiate Self- Check].

j. Verify “Test Passed” indication.

k. If steps e through j have been satisfactorily performed, unit has passed checkout.

3.2 TACAN FAULT DATA COLLECTION.

Use the following procedure to collect the TACAN fault data.

a. Log-on to PC Software Control Program.

b. Select Master Menu item H “Fault Diagnostics”.

c. If System Status Window indicates ALM/ALM condition, select [Display Current Fault Data]. If PC does not indicate ALM/ALM condition, select [Initiate Self-Check].

d. Print/record fault data.

e. Refer to PC Fault Code Index(Table 2-2) and/or Fault Code 33-00-000 A1ZZZ.

3.3 DIGITAL COMPUTER FAULT DATA

COLLECTION.

To observe fault data obtained during self check, perform the following steps.

a. Log-on to PC Software Control Program.

b. Failure Data appears in the System Status Window.

c. Select [Fault Diagnostics] and [Initiate Computer Check].

d. Refer to PC Fault Code Index (Table 2-2) and/or Fault Code 33-00-000 A1ZZZ.

3.4 AUXILIARY FAULT ISOLATION CHECKS.

The items listed below should be checked if the applicable fault isolation procedures do not result in the TACAN Navigational Set being restored to normal operations.

a. Verify that all printed wiring board connectors are properly seated in their sockets.

b. Verify that all connectors are matched uniformly and completely.

c. Check wiring harnesses for bent pins, broken wires, and properly seated connector pins.

d. Verify that all power supply output voltages are within the acceptable DC ranges and do not have excessive AC components

4-1

CHAPTER 4

ANTENNA (33–10–000)

ANTENNA FAULTS FAULT CODES

1. RANTEC ANTENNA FAILURE 33-16-000 A1ZZZ

33-10-000

4-2

Figure 4-1. Antenna Component Location Information

4-3

4-4

4.1 AUXILIARY FAULT ISOLATION CHECKS.

The items listed below should be checked if the applicable fault isolation procedures do not result in the TACAN antenna being restored to normal operations.

a. Verify that all printed wiring board connectors are properly seated in their sockets.

b. Verify that all connectors are matched uniformly and completely.

c. Check wiring harnesses for bent pins, broken wires, and properly seated connector pins.

d. Verify that all power supply output voltages are excessive AC components.

5-1

CHAPTER 5

POWER SUPPLY (33-20-000)

POWER SUPPLY FAULTS FAULT CODES

1. TACAN POWER SUPPLY HAS NO DC VOLTAGES 33-26-000 A1ZZZ

33-20-000

5–2

Figure 5-1. Power Supply Component Location Information

5-3/ (5-4 blank)

1. CHECK POWER SUPPLY FUSE 2A6 F1

2. IS FUSE BLOWN

A1ZZZ

33-26-000 TACAN POWER SUPPLY HAS NO DC VOLTAGES

FAULT CODE FAULT ISOLATION

1. REPLACE POWER SUPPLY FUSE 2A6 F1

2. SET POWER SUPPLY 2A6 CIRCUIT BREAKERS

2A6 CB1, 2A6 CB2, AND 2A6 CB3 TO ON

3. DOES POWER SUPPLY FUSE BLOW

Yes

1. PERFORM POWER SUPPLY CHECK

(REFER TO GS 33-26-00 TABLE 2-9)

2. WAS CHECK SUCCESSFUL

No

1. REPLACE POWER CONTROL 2A6A1

(REFER TO JG 33-01-000)

2. ALIGN POWER SUPPLY CONTROL 2A6A1

(REFER TO JG 33-26-100)

3. DOES THE PROBLEM STILL EXIST

Yes

1. CHECK WIRING HARNESS AND CONNECTIONS

REPAIR/REPLACE AS REQUIRED

2. DOES PROBLEM STILL EXIST

No

RETURN TO SERVICE

Yes

1. CHECK VOLTAGE AT POWER SUPPLY

CONTROL 2A6A1 TP4

2. IS 0 VOLTS PRESENT

No

Yes

1. ALIGN POWER SUPPLY CONTROL 2A6A1

(REFER TO JG 33-26-100)

2. WAS ALIGNMENT SUCCESSFUL

No

Yes

1. REPLACE POWER SUPPLY CONTROL 2A6A1

(REFER TO JG 33-00-001)

2. ALIGN POWER SUPPLY CONTROL 2A6A1

(REFER TO JG 33-26-100)

No

Yes

A1ZZZ

33-26-000

CORRECTIVE ACTION

No

IS AC INPUT VOLTAGE CORRECT REFER TO FAULT CODE 33-00-000 G1ZZZNo

Yes

RETURN TO SERVICE

1. VERIFY RADIO FREQUENCY MONITOR

VOLTAGE REGULATOR 2A3A11 TP1, TP5, AND

TP12 (REFER TO SD 33-45-200)

2. ARE VOLTAGES CORRECT

Yes

RETURN TO SERVICENo

RETURN TO SERVICE

1. REPLACE POWER SUPPLY 2A6

2. ALIGN POWER SUPPLY 2A6

(REFER TO JG 33-26-100)

No

Yes

1. REPLACE POWER SUPPLY 2A6

2. ALIGN POWER SUPPLY 2A6

(REFER TO JG 33-26-100)

5–4

5.1 AUXILIARY FAULT ISOLATION CHECKS.

The items listed below should be checked if the applicable fault isolation procedures do not result in the TACAN power supply being restored to normal operations.

a. Verify that all printed wiring board connectors are properly seated in their sockets.

b. Verify that all connectors are matched uniformly and completely.

c. Check wiring harnesses for bent pins, broken wires, and properly seated connector pins.

d. Verify that all power supply output voltages are within the acceptable DC ranges and do not have excessive ac components.

6-1

CHAPTER VI

TRANSPONDER (33-30-000)

TRANSPONDER FAULTS FAULT CODES

1. CHANNEL X/Y STATUS 33-35-000 A1ZZZ

2. PROCESSED TRIGGERS FAULT 33-35-000 B1ZZZ

3. AGR BLANKING 33-35-000 C1ZZZ

4. DEAD TIME GATE FAULT 33-35-000 D1ZZZ

5. ECHO SUPPRESSION GATE FAULT 33-35-000 E1ZZZ

6. RESTORED VIDEO FAULT 33-35-000 F1ZZZ

7. CONTROL INDICATOR INTERFACE FAILURE 33-35-100 A1ZZZ

8. PROGRAMMABLE ECHO LEVEL FAILURE 33-35-120 A1ZZZ

9. SERIAL INTERFACE ERROR 33-35-130 A1ZZZ

10. AMPLITUDE/SHAPER CONTROLLER FAULT 33-35-140 A1ZZZ

11. 400 WATT POWER AMPLIFIER FAILURE 33-35-190 A1ZZZ

12. TRANSPONDER POWER SUPPLY REGULATOR 33-35-220 A1ZZZ

13. RECEIVER FAILURE 33-35-230 A1ZZZ

14. 100 WATT AMPLIFIER FAILURE 33-35-250 A1ZZZ

15. HPA FAILURE 33-37-000 A1ZZZ

16. DIRECTIONAL COUPLER FAILURE 33-37-180 A1ZZZ

33-30-000

6–2

Figure 6-1. Transponder Component Location Information ( Sheet 1 of 6 )

6-3

Figure 6-1. Transponder Component Location Information ( Sheet 2 )

6–4

Figure 6-1. Transponder Component Location Information ( Sheet 3 )

6-5

Figure 6-1. Transponder Component Location Information ( Sheet 4 )

6–6

Figure 6-1. Transponder Component Location Information ( Sheet 5 )

6-7/ (6-8 blank)

Figure 6-1. Transponder Component Location Information ( Sheet 6 )

6-9

6-10

6-11

33-35-000 AGR BLANKING

FAULT CODE FAULT ISOLATION

C1ZZZ

33-35-000

CORRECTIVE ACTION

C1ZZZ

IS CORRECT SIGNAL PRESENT AT

TRANSPONDER DECODER 2A2A6TP3

(REFER TO SD 33-35-150)

Yes

1. APPLY SUPPLEMENTAL DATA TO

TRANSPONDER ENCODER 2A2A8

2. DOES PROBLEM STILL EXIST

No

ARE ANY OTHER FAULTS INDICATED Yes ANALYZE TACAN FAULT DATA

No REFER TO SUPPLEMENTAL DATA

No RETURN TO SERVICE

Yes

1. REPLACE TRANSPONDER ENCODER 2A2A8

(REFER TO JG 33-00-001)

2. ALIGN TRANSPONDER ENCODER 2A2A8

(REFER TO JG 33-35-170)

6-12

6-13

6-14

IS CORRECT SIGNAL PRESENT AT

TRANSPONDER VIDEO PROCESSOR 2A2A2 TP1

(REFER TO SD 33-35-110)

F1ZZZ

33-35-000 RESTORED VIDEO FAULT

FAULT CODE FAULT ISOLATION

1. REPLACE TRANSPONDER FAULT ISOLATION

PROCESSOR 2A2A4 (REFER TO JG 33-00-001)

2. DOES PROBLEM STILL EXIST

Yes

RETURN TO SERVICENo

No

ARE CORRECT SIGNALS PRESENT AT

TRANSPONDER VIDEO PROCESSOR 2A2A2 TP3,

TP5, TP6, AND TP13 (REFER TO SD 33-35-110)

ARE CORRECT SIGNALS PRESENT AT

TRANSPONDER VIDEO PROCESSOR 2A2A2 TP3

AND/OR TP13 (REFER TO SD 33-35-110)

F1ZZZ

33-35-000

CORRECTIVE ACTION

Yes

No

RETURN TO SERVICE

Yes

1. REINSTALL TRANSPONDER FAULT ISOLATION

PROCESSOR 2A2A4 (REFER TO JG 33-00-001)

2. REPLACE TRANSPONDER VIDEO PROCESSOR

2A2A2 (REFER TO JG 33-00-001)

3. ALIGN TRANSPONDER VIDEO PROCESSOR

2A2A2 (REFER TO JG 33-35-110)

1. ALIGN TRANSPONDER VIDEO PROCESSOR

2A2A2 (REFER TO 33-35-110)

2. DOES PROBLEM STILL EXIST

No

1. REPLACE TRANSPONDER VIDEO PROCESSOR

2A2A2 (REFER TO JG 33-00-001)

2. ALIGN TRANSPONDER VIDEO PROCESSOR

2A2A2 (REFER TO JG 33-35-110)

No REFER TO FAULT CODE 33-35-230 A1ZZZ

Yes

IS CORRECT SIGNAL PRESENT AT

TRANSPONDER VIDEO PROCESSOR 2A2A2 TP5

(REFER TO SD 33-35-110)

No REFER TO FAULT CODE 33-35-190 A1ZZZ

REFER TO FAULT CODE 33-35-120 A1ZZZYes

6-15

33-35-100 CONTROL INDICATOR INTERFACE FAILURE

FAULT CODE FAULT ISOLATION

IS SIGNAL PRESENT AT TRANSPONDER

CONTROL INDICATOR INTERFACE 2A2A1 TP4

WITHIN NORMAL TOLERANCES

(REFER TO SD 33-35-100)

REFER TO FAULT CODE 33-50-000 E1ZZZNo

1. ALIGN TRANSPONDER CONTROL INDICATOR

INTERFACE 2A2A1 (REFER TO JG 33-35-100)

2. DOES PROBLEM STILL EXIST

1. REPLACE TRANSPONDER CONTROL

INDICATOR INTERFACE 2A2A1

(REFER TO JG 33-00-001)

2. ALIGN TRANSPONDER CONTROL INDICATOR

INTERFACE 2A2A1 (REFER TO JG 33-35-100)

Yes

Yes

RETURN TO SERVICENo

A1ZZZ

33-35-100

CORRECTIVE ACTION

VERIFY AGC AT TRANSPONDER

PROGRAMMABLE ECHO LEVEL 2A2A3 TP9 IS

GREATER THAN +2V (REFER TO SD 33-35-120)

1. VERIFY RECEIVER VIDEO AT TRANSPONDER

VIDEO PROCESSOR 2A2A2 TP12

(REFER TO SD 33-35-110)

2. IS CORRECT SIGNAL PRESENT

Yes

REFER TO FAULT CODE 33-35-000 F1ZZZNo

No

1. VERIFY DTG AT TRANSPONDER ENCODER

2A2A8 TP12 (REFER TO SD 33-35-170)

2. IS DTG AT 2A2A8 TP12

Yes

No

Yes

VERIFY TRANSPONDER VIDEO PROCESSOR

2A2A2 TP5 HAS A CORRECT REPLY GATE

(REFER TO SD 33-35-110)

No

Yes

1. REPLACE TRANSPONDER PROGRAMMABLE

ECHO LEVEL 2A2A3 (REFER TO JG 33-00-001)

2. ALIGN PROGRAMMABLE ECHO LEVEL 2A2A3

(REFER TO 33-35-120)

3. IF PROBLEM STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

REFER TO FAULT CODE 33-35-000 D1ZZZ

REFER TO FAULT CODE 33-35-190 A1ZZZ

33-35-120 PROGRAMMABLE ECHO LEVEL FAILURE

6-16

33-35-120 PROGRAMMABLE ECHO LEVEL FAILURE

FAULT CODE FAULT ISOLATION

1. VERIFY ECHO DISABLE GATE AT

TRANSPONDER PROGRAMMABLE ECHO LEVEL

2A2A3 TP3 (REFER TO SD 33-35-120)

2. IS ECHO DISABLE GATE AT 2A2A3 TP3

A1ZZZ

33-35-120

CORRECTIVE ACTION

REPLACE RADIO FREQUENCY MONITOR TIMING

PULSE GENERATOR 2A3/2A4A7

(REFER TO JG 33-00-001)

No

1. REPLACE TRANSPONDER PROGRAMMABLE

ECHO LEVEL 2A2A3 (REFER TO JG 33-00-001)

2. ALIGN TRANSPONDER PROGRAMMABLE ECHO

LEVEL 2A2A3 (REFER TO JG 33-35-120)

3. IF PROBLEM STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

Yes

1. RETURN TO SERVICE

2. IF PROBLEM STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

No

Yes

IS TTL LOW AT TRANSPONDER PROGRAMMABLE

ECHO LEVEL 2A2A3 TP5

(REFER TO SD 33-35-120)

No

1. REPLACE TRANSPONDER PROGRAMMABLE

ECHO LEVEL 2A2A3 (REFER TO JG 33-00-001)

2. ALIGN TRANSPONDER PROGRAMMABLE ECHO

LEVEL 2A2A3 (REFER TO JG 33-35-120)

3. IF PROBLEM STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

IS SIGNAL AT RADIO FREQUENCY MONITOR

TIMING PULSE GENERATOR 2A3/2A4A7 TP5

CORRECT (REFER TO SD 33-45-160)

1. VERIFY SENSE PULSE AT TRANSPONDER

PROGRAMMABLE ECHO LEVEL 2A2A3 TP4

(REFER TO SD 33-35-120)

2. IS SENSE PULSE AT 2A2A3 TP4

Yes

1. REPLACE TRANSPONDER PROGRAMMABLE

ECHO LEVEL 2A2A3 (REFER TO JG 33-00-001)

2. ALIGN TRANSPONDER PROGRAMMABLE ECHO

LEVEL 2A2A3 (REFER TO JG 33-35-120)

Yes

No

CONTINUED

6-17

6-18

6-19

6-20

6-21

33-35-190 400 WATT POWER AMPLIFIER FAILURE

FAULT CODE FAULT ISOLATION

1. VERIFY TRANSPONDER 400 WATT POWER

AMPLIFIER 2A2A10 TP9 IS CORRECT

(REFER TO SD 33-35-194)

2. IS SIGNAL CORRECT

Yes

No

Yes

1. EXTERNALLY TRIGGER FROM TRANSPONDER

400 WATT POWER AMPLIFIER 2A2A10 TP4

2. VERIFY 10 usec TTL PULSES AT

TRANSPONDER

400 WATT POWER AMPLIFIER 2A2A10 TP2, TP3,

AND 6.4 usec DELAYED UNDERCURRENT

REFERENCE PULSE AT TP11

(REFER TO JG 33-35-190)

3. ARE RESULTS AS SPECIFIED

Yes

A1ZZZ

33-35-190

CORRECTIVE ACTION

1. REPLACE TRANSPONDER FREQUENCY

SYNTHESIZER 2A2A15 (REFER TO JG 33-35-

000)

2. ALIGN TRANSPONDER FREQUENCY

SYNTHESIZER 2A2A15 (REFER TO JG 33-35-

240)

No

RETURN TO SERVICE

REFER TO FAULT CODE 33-35-000 B1ZZZ

1. ALIGN TRANSPONDER 400 WATT POWER

AMPLIFIER 2A2A10 (REFER TO JG 33-35-190)

2. WAS ALIGNMENT SUCCESSFUL

1. REPLACE TRANSPONDER 400 WATT POWER

AMPLIFIER 2A2A10 (REFER TO JG 33-35-000)

2. ALIGN TRANSPONDER 400 WATT POWER

AMPLIFIER 2A2A10 (REFER TO JG 33-45-100)

3. IF PROBLEM STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

DOES PROBLEM STILL EXIST

Yes

CONTINUED

1. VERIFY LOW GOING TTL PULSES AT

TRANSPONDER 400 WATT POWER AMPLIFIER

2A2A10 TP4 (REFER TO SD 33-35-194)

2. ARE LOW GOING PULSES AT 2A2A10 TP4

No

No

No

Yes

1. VERIFY DC LEVEL BETWEEN +48V AND +52V

AT TRANSPONDER 400 WATT POWER

AMPLIFIER 2A2A10 TP17 AND TP20

(REFER TO SD 33-35-194)

2. IS DC LEVEL AS SPECIFIED

1. REPLACE TRANSPONDER 400 WATT POWER

AMPLIFIER 2A2A10 (REFER TO JG 33-35-000)

2. ALIGN TRANSPONDER 400 WATT POWER

AMPLIFIER 2A2A10 (REFER TO JG 33-35-190)

3. IF PROBLEM STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

No

Yes

6-22

6-23

IS SIGNAL CORRECT AT PROGRAMMABLE ECHO

LEVEL 2A2A3 TP9 (REFER TO SD 33-35-120)

A1ZZZ

33-35-230 RECEIVER FAILURE

FAULT CODE FAULT ISOLATION

1. MEASURE LO CW INPUT TO TRANSPONDER

RECEIVER 2A2A14 P5

2. IS INPUT GREATER THAN +5 DBM

Yes

RETURN TO SERVICE

Yes

1. MEASURE POWER AT TRANSPONDER

FREQUENCY SYNTHESIZER 2A2A15 J3

2. ARE RESULTS AS SPECIFIED

No

1. REPLACE TRANSPONDER FREQUENCY

SYNTHESIZER 2A2A15 (REFER TO JG 33-35-00)

2. ALIGN TRANSPONDER FREQUENCY

SYNTHESIZER 2A2A15 (REFER TO JG 33-35-

240)

3. IF PROBLEM STILL EXISTS, REFER TO FAULT

CODE 33-00-000 A1ZZZ

No

1. REPLACE RIGID COAXIAL CABLE 2A2W3

BETWEEN TRANSPONDER FREQUENCY

SYNTHESIZER 2A2A15 J3 AND TRANSPONDER

RECEIVER 2A2A14 J5

2. DOES PROBLEM STILL EXIST

Yes

No

1. ALIGN TRANSPONDER RECEIVER 2A2A14

(REFER TO JG 33-35-120)

2. DOES PROBLEM STILL EXIST

Yes

RETURN TO SERVICE

No

A1ZZZ

33-35-230

CORRECTIVE ACTION

No

No

1. REPLACE TRANSPONDER RECEIVER 2A2A14

(REFER TO JG 33-35-000)

2. ALIGN TRANSPONDER RECEIVER 2A2A14

(REFER TO JG 33-35-120)

3. DOES PROBLEM STILL EXIST

Yes

IS SIGNAL PRESENT AT TRANSPONDER

RECEIVER 2A2A14 TP9 (REFER TO SD 33-35-230)

Yes

1. RETURN TO SERVICE

2. IF FAULT STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

Yes

RETURN TO SERVICENo

Yes REFER TO FAULT CODE 33-00-000 A1ZZZ

1. RETURN TO SERVICE

2. IF FAULT STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

IS SIGNAL PRESENT AT TRANSPONDER VIDEO

PROCESSOR 2A2A2 TP13

(REFER TO SD 33-35-110)

1No

6-24

6-25

33-35-250 100 WATT POWER AMPLIFIER FAILURE

FAULT CODE FAULT ISOLATION

IS SIGNAL AT TRANSPONDER 400 WATT

AMPLIFIER 2A2A10A1 TP3 CORRECT

(REFER TO SD 33-35-194)

Yes

No

Yes

IS 10 usec GATED 5MHz CLOCK AT

TRANSPONDER 100 WATT AMPLIFIER 2A2A16A1

TP20 CORRECT (REFER TO SD 33-35-252)

Yes

A1ZZZ

33-35-250

CORRECTIVE ACTION

REFER TO FAULT CODE 33-35-190 A1ZZZ

No

1. REPLACE TRANSPONDER 100 WATT

AMPLIFIER

2A2A16 (REFER TO JG 33-35-000)

2. ALIGN TRANSPONDER 100 WATT AMPLIFIER

2A2A16 (REFER TO JG 33-35-250)

VERIFY TRANSPONDER 400 WATT 2A2A10A1 TP2

IS CORRECT (REFER TO JG 33-35-194) REFER TO FAULT CODE 33-35-190 A1ZZZ

1. REPLACE TRANSPONDER DECODER 2A2A6

(REFER TO JG 33-35-000)

2. IF PROBLEM STILL EXIST REFER TO

SUPPLEMENTAL DATA

Yes

CONTINUED

Yes

ARE 10 usec PULSES AT TRANSPONDER 100

WATT AMPLIFIER 2A2A16A1 TP14

(REFER TO SD 33-35-252)

No

No

IS TTL HIGH AT TRANSPONDER 100 WATT

AMPLIFIER 2A2A16A1 TP5 AND TP6

(REFER TO SD 33-35-252)

No

1. REPLACE TRANSPONDER 100 WATT

AMPLIFIER

2A2A16 (REFER TO JG 33-35-000)

2. ALIGN TRANSPONDER 100 WATT AMPLIFIER

2A2A16 (REFER TO JG 33-35-250)

3. IF PROBLEM STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

Yes

IS DC LEVEL BETWEEN 22 TO 32 VDC AT

TRANSPONDER 100 WATT AMPLIFIER 2A2A16A1

TP1 AND TP2

Yes

1. REPLACE TRANSPONDER 100 WATT

AMPLIFIER

2A2A16 (REFER TO JG 33-35-000)

2. ALIGN TRANSPONDER 100 WATT AMPLIFIER

2A2A16 (REFER TO JG 33-35-250)

No

6-26

33-35-250 100 WATT POWER AMPLIFIER FAILURE

FAULT CODE FAULT ISOLATION CORRECTIVE ACTION

CONTINUED

Yes

Yes

IS TRANSPONDER 400 WATT AMPLIFIER

2A2A10A1 TP2 CORRECT

(REFER TO SD 33-35-194)

REFER TO FAULT CODE 33-35-190 A1ZZZNo

1. REPLACE TRANSPONDER 100 WATT AMPLIFIER

2A2A16 (REFER TO JG 33-35-000)

2. ALIGN TRANSPONDER 100 WATT AMPLIFIER

2A2A16 (REFER TO JG 33-35-250)

3. IF PROBLEM STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

Yes

IS WAVEFORM AT TRANSPONDER 100 WATT

AMPLIFIER 2A2A16A1 TP3 CORRECT

(REFER TO SD 33-35-252)

No

1. REPLACE TRANSPONDER 100 WATT AMPLIFIER

2A2A16 (REFER TO JG 33-35-000)

2. ALIGN TRANSPONDER 100 WATT AMPLIFIER

2A2A16 (REFER TO JG 33-35-250)

3. IF PROBLEM STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

IS 1.5 VDC TO 3.5 VDC AT TRANSPONDER 100

WATT AMPLIFIER 2A2A16A1 TP21 CORRECT

(REFER TO SD 33-35-252)

Yes

No

1. REPLACE TRANSPONDER 100 WATT AMPLIFIER

2A2A16 (REFER TO JG 33-35-000)

2. ALIGN TRANSPONDER 100 WATT AMPLIFIER

2A2A16 (REFER TO JG 33-35-250)

3. IF PROBLEM STILL EXISTS REFER TO FAULT

CODE 33-00-000 A1ZZZ

Yes REFER TO FAULT CODE 33-35-000 A1ZZZ

A1ZZZ

33-35-250

IS INVERTED GAUSSIAN WAVE SHAPE AT

TRANSPONDER 100 WATT AMPLIFIER 2A2A16A1

TP10 CORRECT (REFER TO SD 33-35-252)

No

IS TRANSPONDER AMPLIFIER/SHAPER 2A2A5 TP9

CORRECT (REFER TO SD 33-35-140) REFER TO FAULT CODE 33-35-140 A1ZZZNo

6-27

6-28

6-29/(6-30 blank)

6.1 AUXILIARY FAULT ISOLATION CHECKS.

The items listed below should be checked if the applicable fault isolation procedures do not result in the transponder being restored to normal operations.

a. Verify that all printed wiring board connectors are properly seated in their sockets.

b.