Atari Lynx II with new LCD screen

Atari Lynx II New LCD Screen, 5V Mod and Connection to Framemeister

To replace the aged Lynx screen with a new LCD screen is no rocket science.

First you need an Atari Lynx II and the LCD screen kit by McWill.

Atari Lynx II and LCD screen kit
Atari Lynx II and LCD screen kit

Remove the two rubber feet to reveal four screws. A fifth screw is hidden in the battery compartment.

Atari Lynx II rubber feet
Atari Lynx II rubber feet

After carefully unplugging four connectors you’ll reach the mainboard.

Atari Lynx II inside
Atari Lynx II inside

Now follow the instructions by McWill, eventually you’ll be advised to check the 5V connection. If you don’t get any voltage then insert a game, without it the Lynx won’t turn on.
If there is still no voltage (or if it exceeds 5.45V) then the original circuit has failed already and needs to be replaced with a modern regulator.
Remove the five unneeded parts (yellow circles) and also have a look at possible leaked capacitors (red circles).

Atari Lynx II 5V Mod
Atari Lynx II 5V Mod

I first went for the instructions with a SMD regulator LD1117S50TR as described here.

Atari Lynx II 5V Mod
Atari Lynx II 5V Mod

Well, that was a bad idea. The regulator gets very hot within the first minute and then the game stutters and eventually shuts off.
It only works reliable when the internal screen is turned off and the video is sent through VGA out.

A much better option is a RECOM converter, as described here.

Atari Lynx II 5V Mod
Atari Lynx II 5V Mod

After that was fixed (the Lynx has been running for hours now and didn’t fail once) I was looking for a way to connect it to the Framemeister. It turned out that the RGB-in port accepts a 31 kHz signal too. To make use of the port H-sync and V-sync need to be combined to composite sync. Instructions for a sync combiner can be found here, pinout for RGB-in here.

Atari Lynx II + sync combiner
Atari Lynx II + sync combiner

The sync combiner needs 5V to work, connect Lynx VCC to VGA pin#9:

Atari Lynx II 5V @ VGA
Atari Lynx II 5V @ VGA

Enjoy!

Atari Lynx II through Framemeister
Atari Lynx II through Framemeister

4 thoughts on “Atari Lynx II New LCD Screen, 5V Mod and Connection to Framemeister”

  1. hi
    nice mod!!!
    But I am asking something:
    on atariage they use 7805 0-1 and you use a 7805 0-0.5. Is 500mA is enough for lynx? apprently , yes because you say it works fine now 🙂

    1. Hi, Thanks!
      Yes it works fine. I’ve got this R-78E5.0-0.5 from McWill – he should know what’s good for the mod and what’s not.

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