Samsung WF316LAW Service Manual page 41

6-1. TROUBLE DIAGNOSIS
WARNING
To avoid risk of electrical shock, personal injury or death, disconnect power to unit before servicing, unless testing requires
power.
No Power
Is the voltage of the
outlet normal?
Is the Power Cord normal?
Is the Noise Filter normal?
Is the button and
Sub PCB normal?
Is the connected condition
of the Connector normal?
Replace the Main PCB.
6-2
Unplug the power cord and check the power of the outlet?
NO
- Check the Circuit Bracket.
- Check for power disconnection and supply the rated power.
Check the power cord and replace the power cord.
NO
- Check whether there is any damage in the Plug.
- Check for disconnection and Short circuit in power cord.
Check and replace the noise filter if there is a problem.
- Check whether the housing of the input/output side is normally done.
- Check for disconnection and Short circuit in the Noise Filter.
NO
- Remove the Cover Top and pull out the terminal of the output side.
Then connect the power and check the output voltage. (About AC120V)
(Always unplug the power after checking to prevent electric shock)
Check the power button and Sub PCB.
- Check the feeling and sense when operating the power button and
when it is locked or cannot be pressed, resolve the issue.
NO
- When the S/W product is defective or the board damaged, replace the
Sub PCB.
- Check whether the Flat Wire connecting the Main and Sub has
deviated. (13P)
Check whether the connection condition of the Wire is the same as the
NO
wiring diagram.
- Check the disconnection of the power supply by looking at the wiring
diagram.
- Check the Main PCB Fuse and replace the Main PCB when Opening.