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GT65 modify to 18.432KHz horizontal.

cnc_freak

Junior Member
Hello everyone.
I need to feed to an GT65 Amstrad monitor, a video signal from an hercoules type video card. The video signal has a 18.432Khz horizontal synchronization frequency, and 50Hz vertical.
I managed to synchronize the picture, horizontal and vertical, but the problem is that the picture is not centered on CRT, horizontal. I try to adjust the frame via the magnets on the back of the neck, but it did not bring much. I think by changing some components on the pcb of the monitor will fix the problem, but i don't know which? Any help will be appreciated. Attached is the service manual of the monitor, and a picture showing the problem.
20171229_203755%5B1%5D.jpg
The service manual.
 
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