Hi to everyone!
I followed this thread from the beginning, recently I got all the stuff (HD9800 v5 [2015], Wemos D1R2, Arduino IDE, 5V/3A power supply).
then I did the following mods:
- 100 Ohms resistor between Sync and Ground.
- I Changed the C11 for the recomended value, 22uF.
- Removed the RGB pots and bridge the lines directly.
Then I welded all the wires and checked everything and programmed the lastest version of GBS-C on the Wemos
My test subjet is a
Sony PS2 SCPH-50001 with Components AV cable.
the HD9800 is connected to the VGA input on my LG 50" Plasma TV from 2012
I started up and worked like a charm, I was super happy with the image quality!
I was running "
Fantasy Zone: Complete Collection", testing all the Video Modes/Filters in the game (240p, 480i, 480p)
and testing all the video modes on the GBS-C through the WebGui.
Everything worked phenomenal for almost 30 minutes,
BUT...THE HORROR!
suddenly, the image become terrible corrupted/static and then, a black screen.
I checked the Power source, cables, everything was OK.
Then I grabbed my oscilloscope and started check some voltages and signals,
the voltajes were OK, but something wrong on the clock signals.
The clock on the Myson MVT230 was a beautiful 12 MHz sinusoidal wave, nothing wrong here.
but I checked the clock on the TrueView 5725 and nothing, absolutely dead,
the clock here is supposed to be a 27 MHz sinusoidal wave and the only thing I get is a flatline of 1.48VDC.
someone can check is supposed to works like this?
Occasionally the HD9800 "works", but the image stutter, like an old silent movie.
then the AGC become crazy (the brightness goes up and down) and
if the video mode or image change (on ps2), then become corrupted instantly.
I checked the logs, and the GBS-C don't recognize the format of image input.
I tried to use the HD9800 without the GBS-C, this one boot with the Chinese logo
and then, the "No Signal" appears from the HD9800 itself.
Please help!
I really was shocked for the image quality of this project!