Author Topic: Motorola Lapdock 500 Battery Repair (Read 6552 times)

alext · « **on:** February 23, 2017, 10:20:09 pm »

hey

Recently i bought a used lapdock 500 but the battery seems dead,than after i opened the tape on the back i can measure around 3v on the cells terminals,but on the end of the common wire(to the mainboard) theres 0 v so it seems it is a problem with the battery circuit. what is my options?please give me some advice which component to check and how / does another circuit from a different brand battery might work in it?

alext · « **Reply #1 on:** February 23, 2017, 10:22:01 pm »

more pic

alext · « **Reply #2 on:** February 24, 2017, 09:31:44 pm »

timb · « **Reply #3 on:** February 24, 2017, 11:44:48 pm »

I have a spare LapDock here with a broken dock connector if you need the battery. I bought it for parts awhile back when I picked up another LapDock for my Raspberry Pi.

alext · « **Reply #4 on:** February 25, 2017, 05:36:26 pm »

looks like it has a BQ20Z45 controller,does anybody know which other brand use this chipset in its batteries?

SeanB · « **Reply #5 on:** February 25, 2017, 06:23:07 pm »

The fuse F is blown, either from there being a short on the battery or from one cell being defective and the controller blowing the fuse to safe the battery.

alext · « **Reply #6 on:** February 25, 2017, 06:39:44 pm »

checked the fuse and it is ok

alext · « **Reply #7 on:** February 26, 2017, 01:07:12 pm »

checked the mainboard and looks like 2 components fried

can you help me identify them?

theres the pics:

http://imgur.com/a/UXizs

Rasz · « **Reply #8 on:** February 26, 2017, 04:20:47 pm »

not 2, at least 3
MSP430 probably management chip is also fried, and that means something passed full battery/supply voltage into 3.3V rail

alext · « **Reply #9 on:** February 26, 2017, 06:24:05 pm »

why do you think that the msp430 fried too? / what is the 2 fried one? i cant identify them

Rasz · « **Reply #10 on:** February 26, 2017, 08:40:28 pm »

isnt that a big burnt mark right smack in the middle of the chip?

alext · « **Reply #11 on:** February 26, 2017, 08:44:29 pm »

probably.too small do determine for shure.but what about the another 2 burnt ones?

Rasz · « **Reply #12 on:** February 26, 2017, 08:57:26 pm »

doesnt matter at this point, msp430 is a microcontroller, probably managing whole thing. If it got fried half the chips on the board might be fried too (whole 3.3 rail)

the 2 small ones are most likely mosfets

alext · « **Reply #13 on:** February 26, 2017, 09:01:23 pm »

is there any way to check it?the damage is not obvios.half of it came off easily(might be some contamination)

Rasz · « **Reply #14 on:** February 27, 2017, 12:50:05 am »

download datasheet, identify supply rail, measure resistance to ground on your board

alext · « **Reply #15 on:** March 01, 2017, 10:50:21 pm »

thanks / any ideas for the 2 other chips?(fets?)

alext · « **Reply #16 on:** March 04, 2017, 07:04:10 pm »

do you have any ide where to get this msp430f5521 ? i just find different msp430s anywhere / how to identify the other 2 blown fets?

Rasz · « **Reply #17 on:** March 04, 2017, 08:43:25 pm »

I feel there is a language barrier between us
you have 3 visibly broken parts, AND multiple non visibly damaged ones. msp430f5521 is a microcontroller, its needs programming, you dont have the firmware.

this is trash, throw it away.

alext · « **Reply #18 on:** March 04, 2017, 08:49:05 pm »

ok third attempt

how to identify the -ok,let it be 3- blown parts? ( the microcontroller may be good)

Rasz · « **Reply #19 on:** March 04, 2017, 11:28:26 pm »

clean it with alcohol and take another picture edit: microcontroller

alext · « **Reply #20 on:** March 05, 2017, 07:40:34 am »

thanks,tried it but the surface of the fet is burnt,cant see the numbers on it

Rasz · « **Reply #21 on:** March 05, 2017, 02:17:05 pm »

clean microcontroller with alcohol and take another picture

alext · « **Reply #22 on:** March 05, 2017, 06:43:29 pm »

http://imgur.com/a/1kRR5

Rasz · « **Reply #23 on:** March 05, 2017, 08:29:30 pm »

alext · « **Reply #24 on:** March 05, 2017, 08:45:40 pm »

yes i know they are the fets

i asked 3 times about them but you just responds to the microchip every time.if i cant get the fets fixed first ,it is pointless to check the microchip or am i get it wrong?


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Author Topic: Motorola Lapdock 500 Battery Repair (Read 6552 times)

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