Symmetricom 5071A, Сборка и сервисное обслуживание

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2. Service
Top-Level Diagnostic Tree (Diagnostic Section 1)
47
Self Test Diagnostic Tree (Subsection 2)
This subsection describes what to do after a Self-test fails.
1.2.1 Self-Test Failure Interpretation
QUESTION: Which test(s) failed? (If 13/14: Repair A7 and retest.)
If TEST 13, Interface register test, Remove power, replace A7, and retest.
If TEST 14*, Interface abus offset test,
Interface abus +5V test,
Interface abus +12V test,
Interface abus -12V test, Remove power, replace A7, and retest.
NOTE If test 13/14 fails, remove power, replace A7 and retest .
If TEST 0, CBT register test: Remove power, replace A2, and go to 1.1.3.
If TEST 1, CBT window comp test (open)
CBT window comp test (short), Go to, A2 Thermistor tree
beginning at 3.1.2.1.0.
If TEST 2, CBT therm zero test,
CBT therm ones test, Go to, A2 Thermistor tree beginning at 3.1.2.1.0.
If TEST 3, CBT Cs oven zero test (<num.> V),
CBT Cs oven ones test (<num.> V),
CBT Cs oven bit test (bit <num.>), Go to, A2 Cesium-Oven tree
beginning at 3.1.4.1.0.
If TEST 4, CBT hw ion zero test (<num.> V),
CBT hw ion all 1's test (<num.> V),
CBT hw ion bit test (bit <num.>), Go to, A2 Hot-Wire Ionizer tree
beginning at 3.1.1.1.0.
If TEST 5, CBT mspec zero test (<num.> V),
CBT mspec ones test (<num.> V),
CBT mspec bit test (bit <num.>), Go to, A2 Mass-Spectrometer tree
beginning at 3.1.3.1.0.
If TEST 6, CPU RTDS test (no interrupt),
CPU RTDS test (<num.> tics),
CPU RTDS test (no 1MHz), Remove power, replace A3, and retest.
If TEST 7, CPU clock locked test, Remove power, replace A3, and retest.
If TEST 8, DDFS register test, Remove power, replace A4, and retest.