Table of Contents (cont)

TM 11-6625-646-15

Page

Preliminary procedures ................................................................................................ 27

4-6

SAS amplifier testing procedures ................................................................................. 27

4-8

Channel tests using a rate table ................................................................................... 27

4-9

Airspeed and sideslip tests ........................................................................................... 31

4-10

ASE mode tests ........................................................................................................... 32

4-11

Excitation voltage tests ................................................................................................ 32

4-12

Interlock voltage tests .................................................................................................. 32

4-13

Pedal position variable resistor feedback voltage test .................................................. 32

4-14

Internal test circuits ...................................................................................................... 32

4-15

Printed-wiring circuit board (card) tests ........................................................................ 33

4-17

Demodulator-modulator card ....................................................................................... 33

4-18

Amplifier card .............................................................................................................. 33

4-19

Calibration card ........................................................................................................... 33

4-20

Stopping procedure ..................................................................................................... 33

4-22

Use of connector tools ................................................................................................ .35

PERIODIC INSPECTION, MAINTENANCE AND LUBRICATION

5-1

Scope of maintenance ................................................................................................. 39

5-2

Preventive maintenance .............................................................................................. 39

5-2.1 Systematic care ........................................................................................................... 39

5-2.2 Preventive maintenance checks and services .............................................................. 39

5-2.3 Preventive maintenance checks and services periods ................................................. 39

5-2.4 Daily preventive maintenance checks and services chart ............................................ 40

5-2.5 Weekly preventive maintenance checks and services chart ......................................... 41

5-2.6 Quarterly preventive maintenance checks and services chart ...................................... 41

5-2.7 Cleaning ...................................................................................................................... 43

5-2.11 Touchup painting ......................................................................................................... 43

5-3

Lubrication ................................................................................................................... 43

5-4

Adjustments ................................................................................................................. 43

VI.

TROUBLESHOOTING AND PARTS REPLACEMENT

6-1

Troubleshooting procedures ......................................................................................... 45

6-2

General ....................................................................................................................... 45

6-3

Test equipment required .............................................................................................. 45

6-4

Troubleshooting tables ................................................................................................. 45

6-5

Parts replacement ....................................................................................................... 45

6-7

Replacement of air pump assembly ............................................................................. 45

6-8

Replacement of regulator valves ................................................................................. 45

6-9

Replacement of tube assemblies ................................................................................. 49

6-10

Replacement of air gages ............................................................................................ 49

6-11

Replacement of printed circuit cards ............................................................................ 53

6-12

Repairs ........................................................................................................................ 53

6-13

Card repairs ................................................................................................................. 53

6-14

Connector repairs ........................................................................................................ 58

6-15

Selection of values for actuator simulator card capacitor C607 and resistor

R648 ...................................................................................................................... 58

6-16

Selection of value for amplifier card resistor R9 ........................................................... 60

VII.

DEPOT OVERHAUL STANDARDS

7-1

Applicability of depot overhaul standards ..................................................................... 65

7-2

Applicable references .................................................................................................. 65

7-3

Test facilities required .................................................................................................. 65

7-4

Preliminary procedures ................................................................................................ 65

7-5

Ac power supply circuit and meter rectifier circuit test .................................................. 65

7-6

Dc power supply circuit test ......................................................................................... 66

7-7

Metering circuit tests .................................................................................................... 66

7-8

Actuator simulator tests ............................................................................................... 67

7-9

Internal amplifier card circuit test 70

7-10

External AMPLIFIER CARD TESTER circuit test ......................................................... 70

7-11

External DEM/MOD CARD TESTER circuit test .......................................................... 70

7-12

Half-gain circuits test ................................................................................................... 71

7-13

Pneumatic components test ......................................................................................... 71

7-14

Adapter circuits test ..................................................................................................... 71

7-15

Stopping procedures .................................................................................................... 72

APPENDIX I.

REFERENCES ........................................................................................................................ 75

II.

BASIC ISSUE ITEMS LIST (BIIL) AND ITEMS TROOP INSTALLED OR

AUTHORIZED LIST (ITIAL) (Not Applicable)

III.

MAINTENANCE ALLOCATION ................................................................................................ 79

IV.

ILLUSTRATED PARTS BREAKDOWN .................................................................................... 83

Change 4