Sony mbx-252 don't power up. Help identify component

[eniac22]

I have a sony m/b mbx-252 (Z50-BR 48.4MS02.011) with prooblem, its not power up with the charger but only with the battery, i found that the diode D14 (RJ1196 EXF) has problem. Can you help identify D14 component with what diode can i replace ?

[cpt.charlie]

Re: Sony mbx-252 don't power up. Help identify component

Unfortunately i don't have the schematic, but maybe a 5A 40V schottky would do, you may need to reverse engineer the circuit.

[eniac22]

Re: Sony mbx-252 don't power up. Help identify component

Charlie thanks for the info!!!

I have removed the faulty component and now is power up with the charger but i think to work correctly with power supply and charger at the same time must have the missing component.

[budm]

Re: Sony mbx-252 don't power up. Help identify component

https://www.badcaps.net/forum/attach...5&d=1516053131
I cannot see D14 based on your picture to see what function the D14 is being used as.
Does the D14 show very low resistance in both directions?

[eniac22]

Re: Sony mbx-252 don't power up. Help identify component

D14 is sorted, no resistance in both sides

[eniac22]

Re: Sony mbx-252 don't power up. Help identify component

I have remove the faulty diode and now is work correctly and charge the battery

[MHTSOS]

Re: Sony mbx-252 don't power up. Help identify component

This is a reverse polarity protection diode. It is there to protect the board in case you connect a charger with reverse polarity. The board can work without it but it is better to have one. It is not a critical part. Any fast switching diode that can handle double the amps that the charger can provide will do just fine.