1. Basic Guides to Troubleshoot your Circuit
Mohamad Taib bin Miskon

2. Contents Tools Knowledge/skills Diagnose, repair/replace, verify
Common errors/mistakes

3. Basic tools Multimeter (analog/digital) Test pen
Solder, Soldering iron, sucker etc
Helping hand

4. Knowledge- measurement
Measuring voltage n current
Measuring signal using Oscilloscope

5. Knowledge- circuit operation
Understanding your circuit – timer555

6. Knowledge- circuit operation
Understanding your circuit – relay

7. Knowledge- circuit operation
Understanding your circuit – ADC

8. Knowledge- circuit operation
Understanding your circuit – PIC

9. Knowledge- circuit operation
Understanding your circuit – Regulator

10. Knowledge- circuit operation
Understanding your circuit – I/O

11. Knowledge- circuit operation
Understanding your circuit – I/O

12. Knowing your system What is your system? Block diagram? flow?
What is your i/o? signal?
Your program?(if any)
Your load?

13. Troubleshooting Diagnose – what is the problem?
Symptoms? Hardware? Software/firmware?
output? input? Continuity test?
Power source?

14. Troubleshooting Hardware troubleshooting: Voltage check
Continuity check
Signal check

15. Troubleshooting
Hardware troubleshooting: Examples

16. Troubleshooting
Hardware troubleshooting: Examples

17. Troubleshooting
Hardware troubleshooting: Examples

18. Troubleshooting
Hardware troubleshooting: Examples

19. Troubleshooting Software troubleshooting: Blink test Program check
Software setting etc.

20. Troubleshooting Repair – replace the faulty component
Determining eq components?
Reading datasheet

21. Troubleshooting
Verify
Does your circuit operate/responds accordingly?

22. Common mistakes PCB trace not connected improper grounding
VDD, VSS on PIC circuit
Sensor-to-switch replacement
Power source- over/under voltage

23. Common mistakes Improper load selection Improper circuit combination
Wrong polarity
IC not programmed
Wrong compiler

24. Tq for listening,
Any Question??