Leningrad+

[UncleDim]

боюсь что без осцила - не осилить

ну если дело именно в аналоговых цепях - можно и перебором вариантов.
Для начала удалить транзистор, на котором смешиваются RGB. Посмотреть, не появится ли растр.

[Maciej]

Хочу обратить внимание на пару моментов.
На вход VideoIn телевизора подан Sync, на фото же видим черно-белое изображение с градациями. Я бы проверил следующие вещи...

Хм. действительно - промухал я схему включения транзисторов. сорри...

ну если дело именно в аналоговых цепях - можно и перебором вариантов...

I know that this is russian forum and I cannot require from you to write in english but these posts are to hard for translate by google(forgot to add that i don't understand russian). I'll be very grateful if someone could translate it into english(or into polish)

Regards

[UncleDim]

I'll be very grateful if someone could translate it into english(or into polish)

I think the picture would be better
You may try any of the following:

1. Cut D42.9-VT2.base wire and add R3 (in red on scheme2.jpg)
2. Remove R2, VT2, and add wire between D42.8 and VT3.base (in green)
3. Remove VT1

And (regardless of the choise) try to reduce SCART's 16pin pullup resistance from 220 to 75..150 Ohm.

Good luck!

[Maciej]

I think the picture would be better

Thanks, that cleared up everything

You may try any of the following:

1. Cut D42.9-VT2.base wire and add R3 (in red on scheme2.jpg)
2. Remove R2, VT2, and add wire between D42.8 and VT3.base (in green)
3. Remove VT1

And (regardless of the choise) try to reduce SCART's 16pin pullup resistance from 220 to 75..150 Ohm.

Good luck!

Unfortunatly it didn't help.

I've took another one TV(FUNAI MK5 TV-2000T) and connect via SCART. Turned on AV mode and it works , but:
-only with VIDEO signal(monochromatic); additionally screen is in negative

-RGB and SYNC doesn't work.Following foto show case when D42.9 is connected directly to base of VT3(VT2&R2 removed)

When i've puted +5V on RGB Status(16 pin)it did nothing because 16 pin of SCART is connected to the ground in this model

Regards

[UncleDim]

additionally screen is in negative

The first move - check/replace D11 (since it "prepares" both Inv and Sync sygnals)

Following foto show case when D42.9 is connected directly to base of VT3(VT2&R2 removed)

D42.9? or D42.8?

16 pin of SCART is connected to the ground in this model

This TV may have no RGB inputs on SCART (not sure).

[Maciej]

The first move - check/replace D11 (since it "prepares" both Inv and Sync sygnals)

OK

D42.9? or D42.8?
This TV may have no RGB inputs on SCART (not sure).

To D42.9. When connect to D42.8 the screen is almost black.
But it really doesn't matter since you've got right(this model hasn't got RGB input on SCART).


Regards

[Advertiser]

[UncleDim]

When connect to D42.8 the screen is almost black.

It's Ok. It looks like Sync is correct but no RGB.
Have you tried combination "Sync on D42.8->VT3" and "5V directly to pin16" on Nokia TV?

btw, incorrect signal INV may be caused by wrong diodes (near D11) direction too.

[balu_dark]

When i've puted +5V on RGB Status(16 pin)it did nothing because 16 pin of SCART is connected to the ground in this model

Regards

look here : http://pinouts.ru/Home/Scart.shtml
and take attention to pin 8.
also check level of sync and other signals must be 0.7-1v if bigger - TV may not accept it or sync may gone.
Are you sure what you count right and pin 16 at ground? maybe you check pin 17 by mistake?

also - please give exact description which sygnal from computer to which pin of SCART you wass connect. This may help.

[Maciej]

It's Ok. It looks like Sync is correct but no RGB.
Have you tried combination "Sync on D42.8->VT3" and "5V directly to pin16" on Nokia TV?

Yep, but it doesn't even change the screen. I don't have original remote controler for NOKIA TV so I cannot switch on AV mode. I've tried to put 5-12V on 8 pin(Video status) of SCART. No result.
In a while I'll try another one TV. Hopefully it will works

Regards

[Ewgeny7]

На фото видно, что на телевизоре есть видеовход COMPOSITE. Надо сначала попробовать подключить компьтер через него (черно-белый), если всё в порядке - то пробовать через SCART.