Steve's H5 A3.14 Build (Chicken Pie edition)

[Steve]

Just wanna say thank you to @PhilC for getting my H5 working. Combination of a bad MFP and a botched patch :)

PXL_20201225_104850860.jpg

Still got a little bit of troubleshooting to do in regards to the whites being a shade of yellow. Notice how it kind of 'smears' with different strengths of yellow. This makes me think it's something on the very end of the video output circuit causing it. Does anyone have any suggestions, I was thinking of desoldering/resoldering the DAC. But it's probably not the DAC.

[DoG]

It seems that you got a missing or stuck bit on blue. Check Shifter (pin 21, 22, 23) or the multiplexer for blue (74AC157) then the DAC.

[Steve]

@DoG
Thx for pointing me in the right directions, cheers & merry xmas :D

[PhilC]

@Steve had to leave some.of the fun for you to sort out. Won't take you long.

[Steve]

I had some time to try and fix my Gipsy Kiss colored screen today :lol:

* Every pin and trace on the multiplexers seems fine
* Re-soldered, re-socketed & ultrasonically cleaned the shifter
* Checked all shifter pins
* De-soldered & resoldered the DAC

~ Still got Gipsy Kiss yellow screen :?

Not sure what to do now to be honest. It's not my vga socket as it was the same at Phils.

I guess the shifter could be faulty? I'm wondering if anyone could lend me a spare shifter for testing, I'd cover the post.

[PhilC]

@Steve Try wiggling the monitor socket, I found it very loose on my adaptor, might be you need a new socket?

[exxos]

Just get the diagnostic cartridge on colour test, and check all the bits are switching on the shifter outputs For starters...

[PhilC]

Just get the diagnostic cartridge on colour test, and check all the bits are switching on the shifter outputs For starters...

Seemed ok here with that when I tested it.

[exxos]

Seemed ok here with that when I tested it.

Tested the other side of the buffers as well ?

[PhilC]

@exxos , no I hadn't, I was more interested in getting it to work.