Electronics > Repair

CH341A Serial Memory Programmer Power Supply Fix

<< < (20/25) > >>

Ian.M:
Hmm.  Its a 2550 x 3300  px JPEG, progressive, quality: 72, subsampling ON (2x1), and I can open the freshly downloaded and decompressed (with IzArc) zipped file here in IrfanView with no problems.  However, none of Microsoft's Win10 image or photo viewers or editors can handle that, nor can Chromium based browsers.  Maybe that's why it went AWOL!

md5001996:

--- Quote from: Georgdew on October 17, 2022, 09:53:12 pm ---My modification:

Tested and working properly..
1.Reading bios dump file
2.Deleting the bios chip dump file
3.Writing the bios dump file

--- End quote ---

I like this mod, a 5v and 3.3v switch.

Only lift pin 28 and solder cables like on your images and add switch?

@DavidAlfa The mod seems reliable, but in my case I am getting the CH341a from amazon, so I would like to know if this will help, although I would like to solve the WP/HOLD pins issue as Libreboot says: https://libreboot.org/docs/install/spi.html#do-not-use-ch341a.

But the pictures is low quality and I can't see which pins/tracks to solder/cut. According to what I saw in the pictures, i understood the following and I modified the pictures (although I would require validation if what I indicated in the modified pictures is correct)

Separated Images is Libreboot Images (0000_th.jpg and 0001.jpg ) and one image is my modified photo to do at least the WP/Hold Pins (ch34a.jpg).

md5001996:
Also I would like to know if what I show in the picture (ch341a with a logic converter) will also work.

likorna:
My modification of the black programmer. It can be switched from 5V to 3.3V and from 3.3V to 5V. For 1.8V chips I use a simple adapter.

md5001996:
Which components i need to solder? My ch341a is different and i cant solder as shown in the photos...

Navigation

[0] Message Index

[#] Next page

[*] Previous page

There was an error while thanking
Thanking...
Go to full version
Powered by SMFPacks Advanced Attachments Uploader Mod