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Motorola Lapdock 500 Battery Repair
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Topic: Motorola Lapdock 500 Battery Repair (Read 6560 times)
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alext
Regular Contributor
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Motorola Lapdock 500 Battery Repair
«
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?
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alext
Regular Contributor
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Re: Motorola Lapdock 500 Battery Repair
«
Reply #1 on:
February 23, 2017, 10:22:01 pm »
more pic
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alext
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Re: Motorola Lapdock 500 Battery Repair
«
Reply #2 on:
February 24, 2017, 09:31:44 pm »
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timb
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Pretentiously Posting Polysyllabic Prose
Re: Motorola Lapdock 500 Battery Repair
«
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.
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Any sufficiently advanced technology is indistinguishable from magic; e.g., Cheez Whiz, Hot Dogs and RF.
alext
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Re: Motorola Lapdock 500 Battery Repair
«
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?
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SeanB
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Re: Motorola Lapdock 500 Battery Repair
«
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.
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alext
Regular Contributor
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Re: Motorola Lapdock 500 Battery Repair
«
Reply #6 on:
February 25, 2017, 06:39:44 pm »
checked the fuse and it is ok
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alext
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Re: Motorola Lapdock 500 Battery Repair
«
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
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Rasz
Super Contributor
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Re: Motorola Lapdock 500 Battery Repair
«
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
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alext
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Re: Motorola Lapdock 500 Battery Repair
«
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
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Rasz
Super Contributor
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Re: Motorola Lapdock 500 Battery Repair
«
Reply #10 on:
February 26, 2017, 08:40:28 pm »
isnt that a big burnt mark right smack in the middle of the chip?
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alext
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Re: Motorola Lapdock 500 Battery Repair
«
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?
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Rasz
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Re: Motorola Lapdock 500 Battery Repair
«
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
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Who logs in to gdm? Not I, said the duck.
My fireplace is on fire, but in all the wrong places.
alext
Regular Contributor
Posts: 61
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Re: Motorola Lapdock 500 Battery Repair
«
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)
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Rasz
Super Contributor
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Re: Motorola Lapdock 500 Battery Repair
«
Reply #14 on:
February 27, 2017, 12:50:05 am »
download datasheet, identify supply rail, measure resistance to ground on your board
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The following users thanked this post:
alext
alext
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Re: Motorola Lapdock 500 Battery Repair
«
Reply #15 on:
March 01, 2017, 10:50:21 pm »
thanks / any ideas for the 2 other chips?(fets?)
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alext
Regular Contributor
Posts: 61
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Re: Motorola Lapdock 500 Battery Repair
«
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?
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Rasz
Super Contributor
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Re: Motorola Lapdock 500 Battery Repair
«
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.
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Who logs in to gdm? Not I, said the duck.
My fireplace is on fire, but in all the wrong places.
alext
Regular Contributor
Posts: 61
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Re: Motorola Lapdock 500 Battery Repair
«
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)
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Rasz
Super Contributor
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Re: Motorola Lapdock 500 Battery Repair
«
Reply #19 on:
March 04, 2017, 11:28:26 pm »
clean it with alcohol and take another picture edit: microcontroller
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My fireplace is on fire, but in all the wrong places.
alext
Regular Contributor
Posts: 61
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Re: Motorola Lapdock 500 Battery Repair
«
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
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Rasz
Super Contributor
Posts: 2616
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Re: Motorola Lapdock 500 Battery Repair
«
Reply #21 on:
March 05, 2017, 02:17:05 pm »
clean microcontroller with alcohol and take another picture
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Who logs in to gdm? Not I, said the duck.
My fireplace is on fire, but in all the wrong places.
alext
Regular Contributor
Posts: 61
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Re: Motorola Lapdock 500 Battery Repair
«
Reply #22 on:
March 05, 2017, 06:43:29 pm »
http://imgur.com/a/1kRR5
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Rasz
Super Contributor
Posts: 2616
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Re: Motorola Lapdock 500 Battery Repair
«
Reply #23 on:
March 05, 2017, 08:29:30 pm »
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Who logs in to gdm? Not I, said the duck.
My fireplace is on fire, but in all the wrong places.
alext
Regular Contributor
Posts: 61
Country:
Re: Motorola Lapdock 500 Battery Repair
«
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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