Medion E6416/MD99540 Mainboard D15D REV:2.1

[regi]

Hi all,

somebody replaced the charging chip BQ25A, whilst soldering the resistors 1 to 6 became loose and he isn´t sure they are all in the right place.

as i can´t find a schematic i am hoping somebody can measure the correct values.

The board is a D15D REV:2.1



Thanks for any help

[piernov]

Re: Medion E6416/MD99540 Mainboard D15D REV:2.1

You can try to match the resistors in the typical application diagram of bq24725A datasheet.

[regi]

Re: Medion E6416/MD99540 Mainboard D15D REV:2.1

first of all thank you for responding.

it might not be clear enough on the picture but the resistors 3 on the right side and resistors 4 and 5 on the top are all connected to pin 5 ACOK, the bottom of resistor 4 is connected to ground and the bottom of resistor 5 goes to pin 16 REGN.
The left side of resistor 6 goes to pin 1 of a K72 (small signal mosfet)
i have searched for a similar layout but found nothing near it.

i swapped resistor 6 to get 2,6v so i don´t need the value of resistor 6 anymore.
none of the 6 matched so i think he messed around and i´ll have to wait until somebody gets hands on the same board.

[Conste]

Re: Medion E6416/MD99540 Mainboard D15D REV:2.1

I do have such a board which is working.

If I don‘t have to unsolder anything I can measure. So must I unsolder?

[regi]

Re: Medion E6416/MD99540 Mainboard D15D REV:2.1

Hi,

no you don´t have to unsolder. the values of each resistor should be enough ��

Thanks alot

[Conste]

Re: Medion E6416/MD99540 Mainboard D15D REV:2.1

Hello,

Here are finally the measurements (raw values!):

1. 1,981 Mega Ohm
2. 1,033 mega Ohm
3. 100 k Ohm
4. 9,65 k Ohm
5. 12,03 k Ohm
6. 66,6 k Ohm

I have measured a scrap board, but damage was in another area, so this values should be good.

[regi]

Re: Medion E6416/MD99540 Mainboard D15D REV:2.1

Thank you so much

I´ll give it a try and report how it goes