Just picked up a Sankyo CR Fever Big Powerful FX for $50.
The CRT Screen has a vertical line most of the time but it will randomly show the picture.
Tried re soldering the CRT board connections, but issue still prevails which seems to indicate a flaky vertical IC Control.
So instead of rebuilding the CRT Board, am thinking of switching it over to an LCD Display.

I started to reverse engineer the video supply board to determine the video signals sent to the CRT Board, but can't find details on what seems to be the chip that sends the video.

From my reverse engineering so far the board I have found:

It runs on a Toshiba TMP91C641F HS Microcontroller at 16bits which Autoboots from a 64K Static Ram CMOS Chip: Sharp LH5168-10L

Has two ROM Banks for the Programming: Sanyo LC371100SP : 1 Meg , Sanyo LC374100RP : 4 Meg

There is a Cypress MB37711 Chip to regulate the board voltage to 5 Volts.

The Video Output chips is a EWD-093003 , I can find the chip for sale ,but not the technical data sheet on it. Anyone have the info on the chip?

The 6 Pin CN2 Video Out Connector appears to be putting out 6 Signals:
Video Signals being on Pins: 1 , 2, 3, 5 and 4 & 6 appear to be grounds.
So it seems it is sending either a RGB or a YPbPr Signal out to the CRT Board.

My thought is to use a GBS-8220 Board which can accept either input,
Has anyone done that and if Yes is the 5 pin the H. Sync or V. Sync ?

Thank You for any help, Wes

IC EWD-093003.jpgSankyo Pachinko Video Board.JPG