1 Lesson Title 113-011 DAGR Troubleshooting Lesson Number.

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Lesson Title

113-011

DAGRTroubleshooting

Lesson Number

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LESSON OBJECTIVES

• Perform the DAGR troubleshooting procedure.

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OVERVIEW

• Introduction– Troubleshooting Familiarity– Pretest Setup

• Operations– Troubleshooting Procedure

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DAGR TROUBLESHOOTING

• DAGR Troubleshooting Familiarity – Designed to Detect and Isolate

Failures– Confirm Failure

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• Pretest Setup– WARNING –

• Lithium batteries can explode• Reverse polarity can cause

damage to the battery and receiver

– CAUTIONCAUTION – • Do not mix battery type• DAGR Used for Time• DAGR Resets to Default


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• Note– Clear View of Sky– Display Heater

• No Pretest Connections or Adjustments

• External Power Source with Host Platform mount


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REF Para 19.3

(1) Inspect the DAGR and external cables and equipment for damage and/or missing parts.

(2) If DAGR is damaged or parts are missing, return to the manufacturer.

(3) Push the PWR key to turn the DAGR on.

(4) If DAGR display does not come on after power is applied, check primary battery and primary battery pack, external connections to power source. If battery connections are good, return DAGR to manufacturer.


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(5) If operating in cold conditions, allow additional time (up to 20 minutes) for display to appear. .

(6) Observe the power up test results.

(7) If a failure occurs, check all external connections and rerun self-test.

(8) Follow instructions on display or return DAGR to manufacturer.

(9) After power-up and using primary power batteries, does primary battery life indicator show sufficient battery life?


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(10) If battery life is insufficient, replace primary batteries and update battery information on the Battery page .

(11) After power up, ensure a low memory battery message does not show.

(12) Access the Battery page and observe date shown in the Memory Battery Installed field .

(13) The memory battery date is updated by the user at time of battery replacement .

(14) If the DAGR shows a date approximately six months old, then replace memory battery and update memory battery information on the Battery page


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(15) After power up, perform an operator induced commanded self test (operator intervention required).

(16) If DAGR fails self-test, check all external connections if applicable, and rerun self-test.

(17) Follow instructions on display and/or return DAGR to manufacturer.


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(18) After power up, if the DAGR passes self-test and display blinks between black and grey text, do the following:– Move DAGR [or external antenna] to

open view of the sky.– Hold DAGR 90˚ to horizon.– Ensure satellite acquisition time was at

least two minutes.– Ensure DAGR is in a satellite tracking

mode of operation.

– Perform the manual initialization

procedure.


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(19) If display does not stop blinking, return DAGR to manufacturer.

(20) If display stops blinking, troubleshooting is complete.


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DISPLAY TEST SUMMARY PAGE

(1) From any display (except a message pop-up), push the MENU key twice to display the Main Menu.

(2) Highlight System, then push the ENTER key.

(3) Highlight Test Summary, then push the ENTER key. The Test Summary page is displayed.

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CHECK ON LEARNING

• The troubleshooting procedure is designed to detect and isolate what? – DAGR failures and malfunctions

• True or False. If DAGR is damaged, return to the manufacturer. – True

• When is the memory battery date is updated by the user? – At the time of battery replacement

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LESSON SUMMARY

• You have now learned how to perform the troubleshooting procedure.

1 Lesson Title 113-011 DAGR Troubleshooting Lesson Number.

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