Sinclair ZX80 / ZX81 / Z88 Forums

Hello Mark, finally I made the fix related to the TR4-TR5-TR7 and the video signal is far better than before, I've attached some pictures in order to show it, please let me know if this quality is normal for composite signal, or maybe I should fix some other issue in the board. I changed position th...

Thanks again, Mark, I'm in Greece but I'm from Spain... a long story :) Ok, I understand, I'd read about the different fixes for zx spectrum models, so probably I'll proceed with the fix in order to get video working. I'll let you know after the fix, I hope not destroy the machine! I come from Amstr...

Thank you very much, 1024MAK, actually I tried already the "Composite Mod" procedure, with no luck (I think the transistors hardware problem is there). Then I bought a RGB to RCA (3 => video, audio L, audio R), but no SCART used, so I connected directly to RCA inputs in the back of the TV (4K samsun...

Hello, I have a ZX Spectrum +2 128K grey model, when I connect it to the tv using RGB out and RCA input on the TV, the image is with some kind of noise (waves), no color (sometimes appear flashly), when loading tapes the image is shaking, an after loading a tape, the image is shaking again but worst...