Un50mu6070 Mainboard issue

[Storyteller12]

Re: Un50mu6070 Mainboard issue

I just got a cheap ch341a to start with.

I’ll dump the chip again tomorrow and upload again.

Thanks for the help

Appreciate it

[lotas]

Re: Un50mu6070 Mainboard issue

And what soft do you have for the programmer?

Here is the latest version of "Colibri" for the CH341A.

[Storyteller12]

Re: Un50mu6070 Mainboard issue

I’m using AsProgrammer. I’ll try colibri and see if that makes a difference

[lotas]

Re: Un50mu6070 Mainboard issue

Driver ch341

[lotas]

Re: Un50mu6070 Mainboard issue

Today I checked with "Colibri", it does not save "STATUS REGISTERS", let's stop at AsProgrammer_2.1.0.13 everything is fine with it.

[Storyteller12]

Re: Un50mu6070 Mainboard issue

Ok. Tried again using your version of colibri, and asprogrammer. Still not working.
Everything says successful but nothing

I tried dumping my eeprom that does work and writing that but nothing.

Thinking it may be the chip itself is just bad and not reusable.

[lotas]

Re: Un50mu6070 Mainboard issue

I will now write the correct order of actions in AsProgrammer.
It doesn't work on Colibri.

[Storyteller12]

Re: Un50mu6070 Mainboard issue

Thanks lotas. You been more than helpful.

I appreciate you

[lotas]

Re: Un50mu6070 Mainboard issue

In the program:
1. Click "Detect Chip" and select W25Q40CL and "Select IC".
2. Click "Unprotect".
3. Click "Erase IC" and "Yes".
4. Click "Open File" and select your corrected Dump.
5. Press "Program IC" and "Yes".
6. Click "Verify IC".
7. Press the down arrow to the right of "Unprotect" and select "Edition SREG", put a check mark on S7, S3, S14, S9 and press "Write" and "Yes"
7. Close the program. Ready.

[Davi.p]

Re: Un50mu6070 Mainboard issue

Reading back i don't know why i have written my first post, you don't even have described the tv symptoms...

[Storyteller12]

Re: Un50mu6070 Mainboard issue

Thanks Lotas, but still won't work.

I did exactly as you wrote.

I also tried another chip I found on another mainboard I had laying around and same results.

I made sure the registers were 0x88 and 0x42.


I must be doing something wrong.

[Storyteller12]

Re: Un50mu6070 Mainboard issue

Davi.P:

You were right though.it’s definitely that eeprom that’s bad. All I did was swap eeprom from a 55” mainboard I had and it works.

I’m just trying to figure out why the eeprom I’m programming will not work. it’s definitely the eeprom.

[Davi.p]

Re: Un50mu6070 Mainboard issue

The only possible answers i find is that that chip has some hidden / secret command made for Samsung to make programmed obsolescence, i mean a command to read/write a secret register where it is wrote: "this tv is young / this tv is old and needs to die in a reciclery". Try to find its datasheet, if i'm right you'll not find it..

[lotas]

Re: Un50mu6070 Mainboard issue

Thanks Lotas, but still won't work.

I did exactly as you wrote.

I also tried another chip I found on another mainboard I had laying around and same results.

I made sure the registers were 0x88 and 0x42.


I must be doing something wrong.

Try this dump

[lotas]

Re: Un50mu6070 Mainboard issue

When dismantling and installing the 25Q40, were they not damaged, did the adjacent components move?

[Storyteller12]

Re: Un50mu6070 Mainboard issue

When dismantling and installing the 25Q40, were they not damaged, did the adjacent components move?

I thought that also. So I switched back the eeprom I took from the 55” tv it still works fine.

Also I tried to dump the working eeprom I have and write it but It's still not working. Getting frustrated with it

[Davi.p]

Re: Un50mu6070 Mainboard issue

you would need a logic analyzer like cheap Saleae and the right software to back engineering what the tv asks to the memory...

[lotas]

Re: Un50mu6070 Mainboard issue

Storyteller12 What is your CH341A programmer, there are several types of them (black, green ...) post a photo of it.

[Storyteller12]

Re: Un50mu6070 Mainboard issue

Im using this programmer

[lotas]

Re: Un50mu6070 Mainboard issue

Refinement of the programmer

In the process of working with the programmer, some shortcomings were revealed,
one of them: it is not possible to clear / set the QE bit in the second status register.
We read the datasheet, for example, on the W25Q64FV chip, and find the Quad Enable (QE) punt,
which has a warning:
WARNING: If the / WP or / HOLD pins are tied directly to the power supply or ground during
standard SPI or Dual SPI operation, the QE bit should never be set to a 1.
To fix this flaw, you need to disconnect the legs #WP (pin 3) and #HOLD (pin7) from VCC
and connect them to VCC through 4.7 kΩ resistors.
I propose a step-by-step instruction for finalizing the "black programmer":