As your TV Tuner card works fine using an S-Video camera, this means that your TV Tuner is not at fault and is expecting an S-Video signal. Note that if you supply a composite source to your TV tuner, you will need to set your TV tuner to composite mode, otherwise your picture will show up in either black & white or with random colouring.
Although you can use a Scart -> S-Video/L+R Audio adaptor, what you will need to do is set your receiver to 'S-Video over Scart'. By default it is either 'Composite' or with some receivers 'RGB'. Unfortunately, it does not like your receiver model has this option, although you can check this by performing the following steps (Swedish option shown in brackets):
- Press the 'Menu' button on your remote.
- Go into 'System Configuration' (Systemkonfiguration)
- Go into 'TV Settings' (TV-instăllningar)
- Go to the 'TV Signal' option (TV Signal)
- Press the 'Right' button to go through the options to see if there is an 'S-Video' option. If so, select it and press 'OK'.
If there is no S-Video choice, then what you will need to do is set your TV tuner to 'Composite' mode. This varies from TV tuner card to card. If you have a Hauppauge TV Tuner and use WinTV, click on the 'MENU' button, select 'Display' and select 'Ext 1' to use a composite source. With some other TV tuner's, you will need to press 'AV' or 'External' a 2nd time to switch between S-Video and composite input.