Need Samsung NP-R538 BREMEN-C Rev 1.1

[ahmetozay]

Dear Forum Friends,
This NP-R538 unit has short circuits on several places but cannot trace it due to lack of schematics. I searched google but cannot find it. If someone has this please can you share it? Thanks and Regards

[ahmetozay]

Re: Need Samsung NP-R538 BREMEN-C Rev 1.1

Nobody has this schematic?

[Francisco.s]

Re: Need Samsung NP-R538 BREMEN-C Rev 1.1

Nobody has this schematic?

This could match.

[ahmetozay]

Re: Need Samsung NP-R538 BREMEN-C Rev 1.1

This could match.

Thanks for your help yes BREMEN-D is similiar to BREMEN-C but NP-R540 BREMEN2-I is more similiar. with that still cant find the shorted element on the board. so far i know that the short circuit is on the 3.3v_Aux line and i connect 5v 1A to that line and found the LAN chip getting very hot. I re-solder the chip but still the short circuit continues. Also i checked the components around the LAN chip none of them has short circuit. After re-soldering the LAN chip i connect 5v 1A again and found that HM55 chip is getting hot. So what do you think ? Any advice is very welcome.

[ahmetozay]

Re: Need Samsung NP-R538 BREMEN-C Rev 1.1

i realized that no LAN chip on the board the shortcircuit on the 3.3v_AUX is gone but HM55 getting hot. With the LAN chip on the board 3.3v_AUX line has shortcircuit but HM55 chip is not getting hot. What do you think?

[ahmetozay]

Re: Need Samsung NP-R538 BREMEN-C Rev 1.1

Now P5.0v_STB line has short circuit. I definetely need the right schematic which is NP-R538 BREMEN-C. If someone got this please let me know. Thanks

[whaldsz]

Re: Need Samsung NP-R538 BREMEN-C Rev 1.1

Thanks for your help yes BREMEN-D is similiar to BREMEN-C but NP-R540 BREMEN2-I is more similiar. with that still cant find the shorted element on the board. so far i know that the short circuit is on the 3.3v_Aux line and i connect 5v 1A to that line and found the LAN chip getting very hot. I re-solder the chip but still the short circuit continues. Also i checked the components around the LAN chip none of them has short circuit. After re-soldering the LAN chip i connect 5v 1A again and found that HM55 chip is getting hot. So what do you think ? Any advice is very welcome.

Did you really supplied 5v to the 3.3v_AUX line? Possibly the PCH HM55 chip is now broken. You could have broken the sio chip and the 3.3V/5V regulator this way too.