troubleshooting circuit with DC

[teknician]

Hi,
i am newbie and need a way to diagnose problem in a circuit powered with direct current.

i read about it and using multimeter i can check components individually but in surface mounted device circuit taking out individual component is quiet difficult and i need to find a way to detect fault while in circuit.

can anyone guide me how to diagnose fault on circuit, powered on

this will be a great help for me thanks

best regds
teknician

 

[ericgibbs]

Hi,
i am newbie and need a way to diagnose problem in a circuit powered with direct current.

i read about it and using multimeter i can check components individually but in surface mounted device circuit taking out individual component is quiet difficult and i need to find a way to detect fault while in circuit.

can anyone guide me how to diagnose fault on circuit, powered on

this will be a great help for me thanks

best regds
teknician

hi,
Post the circuit diagram.

 

[teknician]

there is none

hi,
i am talking about motherboard and basic voltage checking to identify the problem but i dont have any circuit diagrams

best regds
teknician

 

[ericgibbs]

hi,
i am talking about motherboard and basic voltage checking to identify the problem but i dont have any circuit diagrams

best regds
teknician

Without a circuit diagram as a reference point for voltages and signals its very difficult to locate some problems.

As I dont know your level of experience, its difficult to advise you.
Perhaps if you looked at some of the webs tutorials that could help.

https://www.hobbyprojects.com/test_and_measurement.html

https://www.hobbyprojects.com/tutorial.html

 

[teknician]

good guess

Hi,

thanks eric for the tutorials,

eric i am a biggner and my only task with electronic is to do with computers

i am trying to find two faults in the motherboard no power and no display.

ritenow i am stuck with no power i heard with the help of voltage checking you can identify where the current is coming and where it is not.

but i really dont know how to go with it but if you can guide me in the simple terms i will be grateful

just for your information about me i can measure components externally but understanding how to measure the voltage and identifying tricks to diagnose incircuit is what i need to know.

please help if you can i will be grateful for your help

best regds
teknician

 

[ericgibbs]

hi,
It sounds like the problem is with power supply module.
Fault finding and repairing these psu's can be hazardous, I would suggest you get onsight experienced help.