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Troubleshooting Basics posting (cont.)

Troubleshooting Basics posting (cont.) -...

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Troubleshooting (cont.) Types of electronic problems Finding defective components Power supply test points
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Types of Electronic Problems No DC Power ¾ Easy to fix Bad or discharged battery Disconnected or broken plug Fuse or breaker blown / broken connection ¾ Difficult to fix “Loaded” by circuit component(s) No AC Input Signal ¾ Verify output of AC source
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Types of Electronic Problems Traumatic failures ¾ Fire / Smoke Damage Actual fire Applied over-voltage ¾ Reverse polarity (DC) Effects: ICs , polarized caps , diodes, transistors ¾ Physical abuse Dropped, thrown, kicked, mishandled, etc. ¾ Water immersion, lightning
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Types of Electronic Problems Intermittent Problems ¾ Mechanical Loose connection, cold / no solder joint, poor crimp, dirty contacts, cracked PWB ¾ Thermal Most likely semiconductor component o Thermal cycling ¾ Erratic Environmental chamber Operate at max. ratings over entire power supply range for an extended time
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