Zx-Uno VGA 2M

Proyectos ajenos al equipo oficial pero desarrollados o promovidos por la comunidad, relacionados con el ZX-UNO / Projects outside the official team but developed or promoted by the community, related to the ZX-UNO
ManuFerHi
Mensajes: 751
Registrado: 15 Nov 2015, 17:50

Re: Zx-Uno VGA 2M

Mensaje por ManuFerHi » 16 Nov 2018, 20:25

First, review the pads solders, the ones that I have indicated in this image.
The SRAM is U3, but it does not have to fail, it can be a fault in the solders, if you are sure it is well solded then you must replace U3.
Adjuntos
Captura.PNG
Captura.PNG (85.45 KiB) Visto 1309 veces

relnet
Mensajes: 7
Registrado: 15 Nov 2018, 08:33

Re: Zx-Uno VGA 2M

Mensaje por relnet » 16 Nov 2018, 23:44

I improved February on IS61WV20488BLL and now I have such a screen
is this error caused by W25Q128 ?
Adjuntos
test-2.jpg

ManuFerHi
Mensajes: 751
Registrado: 15 Nov 2015, 17:50

Re: Zx-Uno VGA 2M

Mensaje por ManuFerHi » 16 Nov 2018, 23:52

Yes, should give OK even if it is not flashed.

relnet
Mensajes: 7
Registrado: 15 Nov 2018, 08:33

Re: Zx-Uno VGA 2M

Mensaje por relnet » 17 Nov 2018, 11:15

What should the U2 system be? because I used W25Q128FVSSIG, is this the correct layout?

ManuFerHi
Mensajes: 751
Registrado: 15 Nov 2015, 17:50

Re: Zx-Uno VGA 2M

Mensaje por ManuFerHi » 17 Nov 2018, 11:24

Yes is the correct.

relnet
Mensajes: 7
Registrado: 15 Nov 2018, 08:33

Re: Zx-Uno VGA 2M

Mensaje por relnet » 18 Nov 2018, 14:55

I have replaced it with the new 25Q128FVSG and it is still the same error, what can I check?

ManuFerHi
Mensajes: 751
Registrado: 15 Nov 2015, 17:50

Re: Zx-Uno VGA 2M

Mensaje por ManuFerHi » 18 Nov 2018, 15:10

rework the welds in the FPGA
Adjuntos
Captura.PNG

relnet
Mensajes: 7
Registrado: 15 Nov 2018, 08:33

Re: Zx-Uno VGA 2M

Mensaje por relnet » 18 Nov 2018, 18:57

Thanks for the hint, but during the soldering I damaged the FPGA now I have to order a new one :( and this will take a while.

Responder