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EEVblog => EEVblog Specific => Topic started by: EEVblog on January 31, 2021, 11:13:15 pm

Title: EEVblog #1370 - Kindle Paperwhite REPAIR
Post by: EEVblog on January 31, 2021, 11:13:15 pm
Dave repairs his pesky Kindle Paperwhite with touch screen and charging issues.

https://www.youtube.com/watch?v=Ferz6Dy73_I (https://www.youtube.com/watch?v=Ferz6Dy73_I)
Title: Re: EEVblog #1370 - Kindle Paperwhite REPAIR
Post by: Brumby on February 02, 2021, 01:28:20 am
Rule #1 - Check voltages.

Covers the battery, I think.   ;)
Title: Re: EEVblog #1370 - Kindle Paperwhite REPAIR
Post by: Tek_TDS220 on February 02, 2021, 02:04:44 am
Serial data lines have become common on batteries for laptops and other devices.  It's a good way to monitor battery health, temperatures, failure of individual cells, etc.  It would be nice if there were a standard software protocol.  This would eliminate any rationale device manufacturers have for not allowing any batteries other than their own.
Title: Re: EEVblog #1370 - Kindle Paperwhite REPAIR
Post by: engineer_in_shorts on February 09, 2021, 03:07:43 pm
Didn't you take apart the kindle years ago.......

..... yup just checked:
https://www.youtube.com/watch?v=phO4QkHWsVE (https://www.youtube.com/watch?v=phO4QkHWsVE)
Title: Re: EEVblog #1370 - Kindle Paperwhite REPAIR
Post by: Renate on February 12, 2021, 12:48:53 pm
I'm more of a Nook fan so it was interesting to see the Kindle teardown.
Did I see places for a standard SD card and a micro SD card?
Is there any access for a console UART?
It would have probably told you a lot of what it was doing when it was being balky.
Title: Re: EEVblog #1370 - Kindle Paperwhite REPAIR
Post by: ChristianW on February 15, 2021, 08:02:21 am
I guess the I2C lines could be an SM Bus commonly used in smart batteries for the fuel gauge.
Protocols often follow the Smart Battery Specification - at least the first few registers should be the same... http://sbs-forum.org/specs/sbc110.pdf. (http://sbs-forum.org/specs/sbc110.pdf.)
If it does have a fuel gauge, it could have "learnt" the charge and health status of the old battery, and so it is not strange that it reports a low stored charge until it has gone through at least one complete charge / discharge cycle.
Title: Re: EEVblog #1370 - Kindle Paperwhite REPAIR
Post by: EEVblog on February 15, 2021, 08:14:46 am
Didn't you take apart the kindle years ago.......

LOL, so I did.
Title: Re: EEVblog #1370 - Kindle Paperwhite REPAIR
Post by: nctnico on February 15, 2021, 01:35:15 pm
Serial data lines have become common on batteries for laptops and other devices.  It's a good way to monitor battery health, temperatures, failure of individual cells, etc.  It would be nice if there were a standard software protocol.
Actually there is: https://en.wikipedia.org/wiki/Smart_Battery_System (https://en.wikipedia.org/wiki/Smart_Battery_System)