WEEK 9

Title : Test and Troubleshoot 

Introduction

Circuit test is an example of white box testing where an electrical probe tests a populated printed circuit board (PCB), checking for shorts, opens, resistance, capacitance, and other basic quantities which will show whether the assembly was correctly fabricated.Troubleshooting is a form of problem solving, often applied to repair failed products or processes. It is a logical, systematic search for the source of a problem so that it can be solved, and so the product or process can be made operational again.

Objective

1. To test the functionality of the circuit.

2. To troubleshoot the circuit.

3. To complete the electronic circuit parts.

Problem Encountered

During the test circuit project there is a problem in a Real Time Clock (RTC). RTC does not work well and do not show the time and date display on the LCD as required by the project. So,the circuit need to troubleshoot and identify the source of the problem.

Project Description

To solve the problem, there are some technique that I used to identify the component or circuit that was breaker or damage. First, give the board a careful visual inspection for faulty joints, damaged PCB tracks, loose connectors, damaged components, signs of overheating, etc.Components often fail by going open or short circuit. We can check for short circuits while they are still on the board. We can often check for open circuits as well, if we allow for the resistance of the rest of the circuit "in parallel" with the component we want to check. Second, measure the actual voltages with the board powered up, to find what is not as we expected it to be. Next, after check the circuit , I identify that crystal 32.768 KHz was damage and need to change. After I change that component, Real Time Clock (RTC) circuit was function as usual.

Project Outcome

The problem for this week was solved and the video below show the circuit function and run.