PC-Engine GT with LCDDRV mod - how to add brightness control

[maded2]

hi,
   I did the LCDDRV mod for my GT.  I remember reading other people have wired to use the existing brightness wheel to adjust the brightness LCDDRV.   Can anyone tell me the steps?

thanks in advance.

[Keith Courage]

I'll be working on a RGB screen PC engine GT later tonight. Will update with pictures for the brightness then. You just have to solder in 1 wire from the Screen to the brightness dial.

[Keith Courage]

Here are the two points to solder in the wire. Also make sure to solder/bridge the small jumper (JP1) on the LCDDRV board.






You will need to turn down the brightness pot on the LCDDRV board quite a bit to compensate for the added brightness.

[maded2]

thank you, so only need to solder 1 wire.  I will give it a try.