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TM 11-6625-3145-14
Operating Instructions-318/338 Service
CLK Test. To enter this test, press 2 while in the Diagnostics menu. This is a test of the internal timebase. It is not a
verification test; neither PASS nor FAIL will appear on the screen. If ALL is selected, the value of the clock interval being
tested will appear on the screen. You should use an oscilloscope to observe the operation of this test. Refer to the
Diagnostics menu or to the troubleshooting trees in
for details. Figure 3-11 illustrates the CLK test.
operation: Select ALL (default) or SINGLE by pressing SELECT. Press the START key. If you have selected ALL, the
value of the clock from 20 ns to 1 s will appear on the screen sequentially. Probe the timebase with an
oscilloscope to verify that the clock interval is correct. If you have selected SINGLE, the DATA ENTRY field
will appear on the next line. You can change the value in this field by pressing INCR or DECR. Press START
and use the oscilloscope to verify the timebase value you have selected. Nothing will appear on the screen.
WR Test. To enter this test, press 3 while in the Diagnostics menu. This test is for the word-recognizer RAM. Refer to
the Diagnostics menu or to the trouble-shooting tree in
for details.
operation: Press START to begin this test. The LOOP test and DISP ON/OFF functions are available here. The LOOP
test has four features: OFF, I/O, ERROR, and TEST. You can select these features by pressing SELECT
even during testing. DISP can also be selected during testing. If DISP is set to OFF, no results will appear on
the screen other than results of the I/O LOOP test. To exit this test, wait until the test finishes, or press STOP,
and then press X. If errors are detected in the test and DISP is ON, some of the following error codes will
appear on the screen.
Error codes: 20, 21, 22, 23 (Refer to
Figure 3-12 illustrates the WR test.
Figure 3-11. Display for CLK tests.
Figure 3-12. Display for word recognizer RAM (WR) test.
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Summary of Contents for 318
Page 119: ...318 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Page 182: ...338 VERIFICATION AND ADJUSTMENT PROCEDURES ...
Page 253: ...318 ___________________ TROUBLESHOOTING TREES ...
Page 344: ...338 TROUBLESHOOTING TREES ...
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Page 519: ...TM 11 6625 3145 14 318 338 4434 925 318 Acquisition Module Wiring Diagram ...
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Page 521: ...TM 11 6625 3145 14 318 338 4434 926 338 Acquisition Module Wiring Diagram ...
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