Fluke 900 service manual, 3 selftest circuit block diagrams, 3 selftest circuit block diagrams - 4 – Fluke 900 User Manual
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Troubleshooting
FLUKE 900 SERVICE MANUAL
4.3 Selftest Circuit Block Diagrams
Each selftest or group of similar selftests is shown on a block diagram with indicators for:
stimulus type
stimulus origin
signal flow
A separate diagram appears for:
Test 0
Tests 1,2
Tests 3,4
Tests 5-8
Tests 9,10
Tests 11,12
Tests 13,14
Test 15
Tests 16,17
Tests 18,19
Tests 20,21
Tests 22,23
Test 24
Tests 25,26
Tests 27,28
Tests 29-40
Test 41
Tests 42-45
Tests 46 through 55 and the Extended Tests do not have separate diagrams.
Tests 46,47 and 49 are comprehensive tests that exercise most of the circuitry. Tests 48 and 50
(keyboard and UART) narrowly exercise their appropriate circuits. Tests 51 tinough 55 exercise
tile Simitiation Option circuitry with activity from the Interface Buffer through to the EBUS.
This circuitry for Delayed Gate and Shadow RAM is not shown on the diagrams in this section,
but is shown on the similar diagram of Section 2.4.
4-4