Which step identifies which unit is at fault?

Which step identifies which unit is at fault?

• A. Listing Faulty Functions
• B. Localizing the Faulty Function
• C. Localizing Trouble to the Circuit
• D. Failure Analysis

Answer: (B)

When you troubleshoot an IC system, you want to pinpoint exactly which unit is not doing its job. This step—localizing the faulty function—targets the specific function that isn’t performing correctly and traces it to the unit responsible. It’s the move that converts observed symptoms into a concrete candidate for the faulty hardware, so you can test or replace that unit. Listing faulty functions lists what’s wrong but doesn’t tell you which unit is at fault. Localizing trouble to the circuit narrows down to a circuit level, but it may still leave ambiguity about which particular unit within that circuit is problematic. Failure analysis comes after identifying the fault and usually after repair, to determine root causes; it isn’t the step used to first identify which unit is at fault.

When you troubleshoot an IC system, you want to pinpoint exactly which unit is not doing its job. This step—localizing the faulty function—targets the specific function that isn’t performing correctly and traces it to the unit responsible. It’s the move that converts observed symptoms into a concrete candidate for the faulty hardware, so you can test or replace that unit.

Listing faulty functions lists what’s wrong but doesn’t tell you which unit is at fault. Localizing trouble to the circuit narrows down to a circuit level, but it may still leave ambiguity about which particular unit within that circuit is problematic. Failure analysis comes after identifying the fault and usually after repair, to determine root causes; it isn’t the step used to first identify which unit is at fault.