A short time ago they brought me an adsl modem to check it, since it did not connect to the internet. In this post I am going to explain how to diagnose and repair an adsl modem or a router.
We will need the following tools:
- Multimeter
- Cautin
- Tin
- Solder paste (Optional)
- Screwdriver
Steps for diagnosis and repair:
Step 1: One of the first steps would be to verify if the power source is sending the voltage indicated on its label
In my case, the charger must send 12 volts, which I tested with the multimeter if it is marking them, we would already discard the source and it would have to be disarmed as a team, otherwise, it would only be necessary to replace the source and hopefully it will work without any problem .
Step 2: Once the source has been discarded, it only remains to disassemble the equipment to verify if there is any inflated capacitor, if there is one, it is only necessary to replace it.
In this image it is not appreciated much which is the inflated condenser, but in the following image the one that is damaged will be marked.
Once the capacitor is located, you just have to remove it from the card. Using the soldering iron, you apply a little tin with paste to loosen the solder of the piece to be able to remove it easily.
Once the damaged part is removed, look for a similar replacement. In my case it was a 470 µF 16v capacitor, you can put a capacitor with the same µF and a higher voltage if you don't get the same one, this does not affect anything.
Note: The capacitor can be of higher voltage, but it should never be less than indicated
Once the damaged capacitor has been replaced, it would only be necessary to assemble and connect the equipment to see if it is working correctly.
As can be seen in the image, the equipment is working correctly.
That's all folks.
Cc:-
@steemitblog
@steemcurator01
@steemcurator02
@stephenkendal
@shortsegments