737-700 AVIONCS BITE HANDBOOK 航电自测设备手册 1(10)

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TESTS from the CDS MAIN MENU. This shows the GROUND TESTS MENU page. You can not do any ground tests with an engine on. GROUND TESTS MENU Page The GROUND TESTS MENU page shows a list of the ground tests you
can do. These are the ground tests: -DEU X self test -DU loop test -DU optical test -WXR display test.
-WXR/TERR display test. To operate the DEU X self test, select LSK 1L. To operate the DU loop test, select LSK 2L. To operate the DU optical test, select LSK 3L. To operate the WXR/TERR display tests, select LSK 4L.
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737-700 MAINTENANCE TRAINING MANUAL

D EX MAINT/BITE
CSDU MAIN MENU 1/ 1 <CURRENT STATUS
<INFLIGHT FAULTS
<GROUND TESTS
<IDENT/CONFIG
<INPUT MONITORING
DISCRETE STATUS <INDEX

D EX MAINT/BITE
CSDU GROUND TESTS MENU 1/ 1 <DEU X SELF-TEST < DU LOOP TEST < DU OPTICAL TEST <WXR /TERR DISPLAY TEST
<INDEX
A31-62-00-806.fm
CDS BITE PAGES - GROUND TESTS MENU

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737-700 MAINTENANCE TRAINING MANUAL
CDS BITE PAGES - DEU SELF TEST 1
General
To do the DEU self test, select line select key (LSK) 1L, DEU X (1 or 2) SELF TEST from the GROUND TEST MENU PAGE. This shows the SELF TEST MENU page.
SELF TEST MENU Page
The SELF TEST MENU page shows information about the self test.
The SELF TEST MENU page does not show test data during the self test. The SELF TEST MENU page shows test data when the test is complete.
The test takes 75 seconds. The test can take up to 180 seconds because if the test fails the first time, the DEU operates the test a second time before it reports a fault.
To do the self test, select LSK 6R, RUN.
To not do the self test, select LSK 6L, INDEX.
DEU SELF-TEST Page
When the you select RUN on the SELF TEST MENU page, the core software takes 7 to 10 seconds to reset. The control screen shows DEU SELF-TEST during the DEU reset. If the reset cannot occur because of an internal DEU fault, the DEU SELF-TEST FAIL screen shows. If the DEU BITE is inoperative, the DEU SELF-TEST page will stay in view.
SELF-TEST IN PROGRESS
If the reset operates correctly, you see the SELF-TEST IN PROGRESS page. Training Information Point If the DEU SELF-TEST page shows longer than 3 minutes, select the
INIT REF key on the MCDU.
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737-700 MAINTENANCE TRAINING MANUAL

A31-62-00-807.fm
CDS BITE PAGES - DEU SELF TEST 1

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737-700 MAINTENANCE TRAINING MANUAL
CDS BITE PAGES - DEU SELF-TEST 2
DEU Self-Test Results
When the self-test is over, the MCDU shows the results. If the DEU is OK, the MCDU shows DEU SELF-TEST PASSED. The DEU stores the results of the self-test. The MCDU shows the CAUTION display. Do not remove power to the DEU during this time. When the MCDU shows the INDEX, the test results are stored.
If the DEU senses faults during the self-test, the MCDU shows SELF-TEST FAILED. The DEU stores the results of the self-test. The MCDU shows the CAUTION display. Do not remove power to the DEU during this time. When the DEU removes the CAUTION display, you can push LSK 6R to see the faults. When you are finished, push LSK 6L to return to the index.
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737-700 MAINTENANCE TRAINING MANUAL
　
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