Canon V-20 FR - strange colors on the screen

Por marcepan

Supporter (5)

Imagen del marcepan

17-01-2023, 22:52

Hello everyone. I am the owner of a Canon V-20 (french version). I made a scart cable but the colors on my TV are incorrect. The blue color in BASIC is very very bright. In games, instead of black, it's green. Red is a bright pink. I feel that all the colors are very bright. I'm sure my cable is OK. I've made dozens of cables for amiga/atari/commodore/amstrad etc before. Do I need to put resistors on RGB signal cables? Or maybe my computer is damaged? Thanks in advance for your suggestions.

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Por marcepan

Supporter (5)

Imagen del marcepan

18-01-2023, 13:22

Here you have some examples:

Por sdsnatcher73

Enlighted (4307)

Imagen del sdsnatcher73

18-01-2023, 14:30

You can look if there are any variable resistors in the RGB path to adjust the levels. RGB on TMS99xx series is not perfect and the colors are usually a bit off (but not as bad as in your photos).

Por marcepan

Supporter (5)

Imagen del marcepan

18-01-2023, 14:59

I'm a bit lost because I made a cable from this schematic:
https://www.msx.org/wiki/RGB_%288-pin_DIN_45326%29#Canon_V-20_and_Yashica_YC-64_released_in_France
but now I saw that there is a different pinout in the manual:

Pins 6-7-8 are different
Unfortunately when i changed the connections i got nice black, blue and red but no green this time

Por Bastion Rebel

Expert (93)

Imagen del Bastion Rebel

18-01-2023, 17:17

hi otherwise there is this box with several connector for different MSX ... Available

Por Bastion Rebel

Expert (93)

Imagen del Bastion Rebel

18-01-2023, 17:18

Por marcepan

Supporter (5)

Imagen del marcepan

18-01-2023, 22:42

Problem solved! The cable was OK (first version, from msx.org). Just for test, I took another, old TV and connected the Canon to it. The colors are good!!! It's never happened to me before. I think that Samsung is less tolerant of signal strength. Thanks for your help