Quote:
Originally Posted by Zirowe
Hi, is it possible to update eink waveform and if so, then how?
The problem:
I had an european kindle 3 3G with a cracked screen.
I ordered a replacement screen from China and it was installed without a problem.
The replacement screen is almost the same as the one I had.
But the new screen can't show pictures correctly, like it lacks the correct greyscale to do so.
- - - - -
So how can I fix the waveform problem?
Where can I get the proper .wbf file or the one mentioned above?
If I got the correct wbf file, how do I install it?
Maybe if I run a full kubrick unbrick process it will fix this problem?
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First:
No, Kubrick can not change the contents of that waveform ee-eprom.
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As you have discovered, the waveform calibration is stored in a serial ee-eprom present on one of the flat cables to the display.
Since the information there can be read by the system at run-time, that device must be on one of the internal hardware buses.
But that does not mean that a "write" function is available for that device on the internal hardware bus.
So, second:
Do not discard or damage the broken screen you have removed, you may have to connect it back up once (if) we find a way to "dump" that ee-eprom to a file.
Note:
There are some posts/pictures on the 'net where at least one person soldered test leads to the ee-eprom and used special hardware to read out its storage.
**Not recommended** at this point.
Third:
Place self into a "holding pattern" for right now - -
I don't have a "sacrificial K3" to devote to poking at its internal buses.
I do have a "Broken Screen Kindle" on order - it should be here next week.
Purchased just for this sort of purpose (poking at the internals with a real chance of ruining the electronics).
Another thing to consider:
Shop for a "Broken K3" (other than a broken screen, say, a broken keyboard).
Then just swap screens.
There may even be members reading this post here with a broken keyboard K3 that could help you out by PM.
OR
If you have the technical skills and tools, it may be possible to un-solder, swap, and re-solder that programmed ee-eprom for the factory blank one.
**Not recommended** yet at this point in the problem solving.