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MCS,PHD
Argosy University/ Phoniex University/
Nov-2005 - Oct-2011
Professor
Phoniex University
Oct-2001 - Nov-2016
Develop a procedure for isolating the fault that is causing the malfunction described in Problem 4-44.
Problem 4-44
Refer to the logic circuit of Figure 4-41. Recall that output Y is supposed to be HIGH for either of the following conditions:
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When testing the circuit, the technician observes that Y goes HIGH only for the first condition but stays LOW for all other input conditions. Consider the following list of possible faults. For each one, write yes or no to indicate whether or not it could be the actual fault. Explain your reasoning for each no response.
(a) An internal short to ground at Z2-13
(b) An open circuit in the connection to Z2-13
(c) An internal short to VCC at Z2-11
(d) An open circuit in the VCC connection to Z2
(e) An internal open circuit at Z2-9
(f) An open in the connection from Z2-11 to Z2-9
(g) A solder bridge between pins 6 and 7 of Z2
Answer

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