PS2 LCD Modification
During the heyday of the PSTwo slimline, a few companies developed attachable LCDs to make use of the console size. One of these screens was developed and sold by Pelican and was dubbed the "Game Glass" LCD. After opening the screen up I quickly recognized its layout to be identical of portable DVD player screens used at the time. Fortunately, these screens tended to use a common chroma encoder circuit, the IR3Y31M. However, all DVD players that use this chip keep it in either S-video or composite output mode, giving some very undesirable results. Since the PS2 is capable of RGB I looked into a modification for sending a pure video signal to the circuit. Here is a very simple schematic I made explaining how to do so:
Pretty simple stuff, pin 39 is the sense switch for RGB inputs and pin 5 is the sense switch for S-video input. The stock setting of this screen is only for composite, so I modified it to accept RGB, S-video, and stereo audio:
The easiest method for audio input was using a headphone jack since it has the smallest footprint. Here are pics of the inside:
Unfortunately the IR3Y31M has an incredible small footprint and package size, so doing this modification takes a good bit of soldering expertise. Since soldering to the pins directly was necessary (the board was not designed to use the external RGB input pins), I used superglue to permanently hold down the 30awg wire after I soldered it. While I normally do anything I can to use glue I found that in this case it was pretty necessary. Note the bottom blue wire is not needed for this mod but was necessary for repair. Now, the results:
Left is the improved S-video output and the right image is the perfect RGB output. Right click to view the full-size images.