ICOM IC-746/756/PRO Series CCFL-to-LED Backlight Conversion

Notice: I’m not selling any kits. I offer this option for customers that actually need their backlights repaired, and are willing to ship the entire radio in for service, not just the front-panel.

April 2018:

I’m now able to convert backlight circuits from CCFL to LED in the following radios:

IC-746
IC-746PRO
IC-756
IC-756PRO
IC-756PROII
IC-756PROIII

If the original circuit is in bad shape, or the CCFL tube is very dim, I can replace the CCFL tube with a 12-volt LED strip.
No inverter circuit is required, so there are no RFI issues.
I add a simple circuit (shown below) that allows the rig’s dimmer function to work as intended.
I use the Flexfire UltraBright Slim Series LED strip, which is only 3.5mm wide, and fits perfectly in the IC-756/PRO series displays.
In the IC-746/PRO displays, there’s a wider opening, so I add a spacer.
The IC-746/PRO series requires 3 sections of this LED strip. And the IC-756/PRO series requires 7 sections.

IC-756PROII with LED conversion at 100% brightness:

IC-746 with LED conversion at 100% brightness:

Comparison of an original Pro2 CCFL tube (bottom) and a new LED strip (top): 

An LED strip all lit up: