Anyone has any idea what could it be? It is similar to a resistance but not sure with that letter 'L'
It meassures about 220 Ohms like an 221 SMD resistor, but I not sure what it is.
Could it be a filter ? There are four of this in serial and three measures the same, about 220 Ohms but one of them meassures 23 megaohms, so I think it could be opened.

 

The letter L used in a circuit schematic is commonly used to designate an inductor.

 

'L' is the standard symbol for an inductor. There would usually be some wire wound around a form or bobbin. The pictures do no clearly show what you are talking about.

 

It is usual to use 'L' letter at shematics or in PCBs, but never seen on a SMD before. For that reason I am not sure what it is.

 

A 2-pin SMD device wth a single letter marking could be a fuse, L being 1Amp. However, in a group like that, a fuse makes little sense, so my guess is they are inductors used as noise filters on signal lines (power lines would be much lower resistance). Quite often, under fault conditions, these are known to act as fuses.

 

If are inductors it is suposed that having the same letter might be the same value? How can I guess that without the schematic diagram?

 

It is usual to use 'L' letter at shematics or in PCBs, but never seen on a SMD before. For that reason I am not sure what it is.

SMD inductors do exist. I have seen them. Here is one on Digikey…

 

SMD inductors do exist. I have seen them. Here is one on Digikey…

View attachment 293598

I do not see any 'L' on it

 

I am going to guess that they are all 220Ω power resistors.
Wattage rating is unknown, possibly 1-5W.

 

I guess based on its size, matches 1206 that are only about 1/4w. But I am not sure the odds of having 6 resistors of same value in serial mode. It is nosense.

 

I guess based on its size, matches 1206 that are only about 1/4w. But I am not sure the odds of having 6 resistors of same value in serial mode. It is nosense.

It is not nonsense.
Looking at the discoloration on the board I am going to guess that they (total of 6) are all 220Ω 1W resistors.
This is a way of distributing and dissipating up to 6W of power among many components over a larger area.

 

A guy in another forum explained me that 'L' could be a letter used during manufacturing process that shows the laser cut depth and those resistors have been scrapped off and can lost their upper film with the EIA96 marking code. So it is supposed that all those six resistor are the same 1206 - 221code type for dividing the power disipation, and perhaps make a voltage divider.

 

A guy in another forum explained me that 'L' could be a letter used during manufacturing process that shows the laser cut depth and those resistors have been scrapped off and can lost their upper film with the EIA96 marking code. So it is supposed that all those six resistor are the same 1206 - 221code type for dividing the power disipation, and perhaps make a voltage divider.

There is no sign of a voltage divider. As far as I can see, all six SMD resistors are connected in series.

 

I do not see any 'L' on it

I thought you meant the L was on the PCB; not the part.