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3-18
OPERATING THE TESTER
Capacitor failure
C4 100nF 100 nanofarad
50 nF
NODE 90 PIN: 2
R
esistor failure
R28 10k
Ω
10 kilohms
8 KO
NODE 67 PIN: 1
Resistor Pack failure
RP1 22.00K0 22.00 kilohms
20.8 KO
NODE 66 PIN: 2
18.6 KO
NODE 35 PIN: 3
24.3 KO
NODE 34 PIN: 4
25.7 KO
NODE 67 PIN: 5
Gray Code failure
U2 74HCT1191 74HCT1191
CRC 7EC4 NODE: 328 PIN: 2
CRC 7EC4 NODE: 333 PIN: 3
CRC 7EC4 NODE: 349 PIN: 6
Vector failure
U2 (Vec) 74240 vector
NODE: 210 PIN: 3 STATES: 2,5,7
NODE: 212 PIN: 5 STATES: 2,6,8
NODE: 214 PIN: 7 STATES: 2,11,13
NODE: 217 PIN: 9 STATES: 2,22
NODE: 220 PIN: 12 STATES: 2,5,7
NODE: 222 PIN: 14 STATES: 2,3
NODE:
227 PIN: 18 STATES: 2,27
AutoProbeCheck
Failure Messages
The AutoProbeCheck (APC) test checks for probe contact. If it finds an open, the test
aborts, and a failure message, such as the one below, is displayed on the CRT and on the
printout. If a failure tag indicates APC failures, you may have a fixture contact problem.
Check the fixture, and retest the board.
R 28 10 K
Node 67
Possible contact problem on node 65
Possible contact problem on node 84
Содержание Z1800 Series
Страница 5: ......
Страница 9: ...IV...
Страница 11: ...VI...
Страница 93: ...2 40 TESTER DESCRIPTION...
Страница 115: ...3 22 OPERATING THE TESTER...