PAL RGB horizontal shift

[SuperPlay]

Hi Folks

I have the infamous issue with horizontal shift (where on a CRT the RGB image is shifted to the left slightly due to composite sync)

Has anyone made-up one of these?

http://nfggames.com/forum2/index.php?topic=4436.0

http://www.sega-16.com/forum/showthread.php?21131-RGB-Horizontal-%28left-shift%29-correction-circuit-and-layout


Is it worth trying a Composite Sync Stripper (LM1881) ?

http://www.mmmonkey.co.uk/composite-sync-stripper-lm1881/


Thanks

[HercTNT]

Professor put up a simple circuit showing how to build the sync stripper. It worked for me, give it a go.

[SuperPlay]

I have done a bit more digging and have identified that this seems only to be an issue with composite sync and PAL TV sets.  Sets that support PAL+NTSC (or just NTSC for that matter) do not seem to have the issue, many of these sets also allow you to set the RGB sync from PAL to NTSC in the menu.

I will give the sync stripper a go as suggested and I will see if I can find anyone that has built the PAL Horizontal sync fixer circuit.

[fraggore]

most of the old crt's pal that is, suffer this you could just try and fined the service menu and adjust the screen that's what i have done.

[SuperPlay]

The CRT had no service menu.  However I opened it up and manually changed the pots :-)

[fraggore]

all good then tidy

[SuperPlay]

all good then tidy

Sure is :-)