Fluke 900 - Manual (Page 3)

Table of Contents
1 Service Manual Introduction.................................................................................................................. 1-1
1.1 Description of Operator, Service Manuals .................................................................................. 1-1
1.2 Basic Operation of Keyboard and Display................................................................................. . 1-1
2 Theory of Operation................................................................................................................................ 2-1
2.1 General............................................................................................................................................. 2-1
2.2 Interface Buffer.............................................................................................................................. 2-2
2.3 Micro Board.................................................................................. ................................................. 2-3
2.4 High Speed Board........................................................................... .............................................. 2-6
2.5 Test Clips........................................................................................................................................ 2 - 1 1
3 Selftest........................................................................................................................................................ 3-1
3.1 Reading Selftest Results................................................................................. ............................... 3-1
3.1.1 General Selftest Results....................................................................................................... 3-2
3.1.2 Rag Results........................................................................................................................... 3-3
3.1.3 Chip Size LED Error Codes................................................................................................. 3-5
3.2 Running and Reading Individual Selftests................................................................................... 3-6
3.3 Individual Selftest Descriptions.................................................................................................... 3-6
TEST 0 SLFT_CLIP........................................................................................................................ 3 - 6
TESTS 1,2 PULLO_MON, PULLl_MON..................................................................................... 3 - 7
TESTS3,4PULL0_FLT,PULL1_FLT.............................................................................................. 3-7
TESTS5,6SYNCO_Hres_FLT,SYNCl_Hres_FLT......................................................................... 3-7
TESTS 7,8 SYNCO Lres FLT, SYNCl Lres_FLT........................................................................... 3 - 7
TESTS 9,10 PINDIS0_FET, PINDIS1_FLT.................................................................................. 3 - 7
TESTS 11,12SLFrSTO_FLT,SLFTSTl_FLT................................................................................... 3-7
TESTS 13,14 VccON_FLT, GndON_FLT.............................. ...................................................... 3 - 7
TEST 15 PULLPOS FREQ............................................................................................................. 3 - 8
TESTS 16,17 TRIGOALO_EQUAL, TRIGQAL1_EQUAL.......................................................... 3 - 8
TESTS 18,19 QALO EQUAL, QALl EQUAL .............................................................................. 3 - 8
TESTS 20,21 TRIGiT EQUAL, TRIG1_EQUAL.......................................................................... 3 - 8
TESTS 22,23 PULLO_TRIG_EQUAL, PULL1_TRIG_EQUAL.................................................. 3 - 8
TEST 24 PULL0_TRIGQAL.......................................................................................................... 3 - 8
TESTS 25,26 FM_STAT_NFLT, FM_STAT_FLT......................................................................... 3 - 9
TEST 27 FMASK_WB_TEST........................................................................................................ 3 - 9
TEST 28 FMASK CAL................................................................................................................... 3 - 9
TESTS 29,31,33,35,37,39 FMxx_FLT.................................... ....................................................... 3 - 9
TESTS 30,32,34,36,38,40 FMxx_NFLT......................................................................................... 3 - 9
TEST 41 ACT_DIS_CLR........................................................................................................ ....... 3 - 9
TESTS 42,43 PULLO_ACT_TSTON, PULL1_ACT_TSTQN....................................................... 3 -10
TESTS 44,45 PULL0_ACT ACTSTR, PULL1_ACT_ACTSTR.................................................... 3 -10
TESTS 46,47 FREQ_BIAS_'§HORT, FREQ_BIAS_LONG......................................................... 3 - 1 0
Interface Buffer shift register subtest.................................................................................... 3 - 1 0
Frequency HW subtest.......................................................................................................... 3 - 1 1
Threshold HW subtest........................................................................................................... 3 - 1 1
Reset HW subtest................................................................................................................... 3 - 1 1
Result bytes: ........................................................................................................................... 3 - 1 2
TEST 48 KEYBQARD OPEN........................................................................................................ 3 - 14
TEST49TEST_CYCLE................................................................................................................... 3 - 1 4
TEST50UART_TEST..................................................................................................................... 3 - 1 6
TEST 51 DGATE_TEST................................................................................................................ 3 -17
TEST 52 PULLO XTRIG......................................................................................... ..................... 3 - 19