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Adder Diagnostic Troubleshooting #4
Adder Troubleshooting with Logic Probe
Observe the LED's on the test fixture below and note failure that occurred during testing and also note the additions that were completed correctly. You are to use this information to troubleshoot the Adder Assembly using a virtual logic probe. The adder schematic and test setup are shown below. The logic probe recordings (Probe U1 through Probe U2) were made when the system was in the failure state shown as the Error Capture Frame below.
Adder- Four Bit Test Fixture
Error Capture Frame
Select to probe one of IC's below(U1 - U5) as required to determine cause of fault shown in " Error Capture Frame."
Probe U1 Probe U2 Probe U3 Probe U4 Probe U5
Adder Test Setup