Author Topic: PC-Engine GT with LCDDRV mod - how to add brightness control  (Read 271 times)

maded2

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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

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Re: PC-Engine GT with LCDDRV mod - how to add brightness control
« Reply #1 on: July 07, 2024, 02:13:23 AM »
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

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Re: PC-Engine GT with LCDDRV mod - how to add brightness control
« Reply #2 on: July 08, 2024, 06:32:12 AM »
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

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Re: PC-Engine GT with LCDDRV mod - how to add brightness control
« Reply #3 on: July 08, 2024, 10:31:50 AM »

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