How To: Spektrum DX7 LCD Back Light Mod.

**coptermanic** · 03-01-2010, 10:40 AM

Pardon for being ignorant on most things electronic, but what have you done with the regulator? Is it easy to do what you did - ie, could I do it!!?? LOL

**sacko** · 03-01-2010, 01:29 PM

Changed it

Its about £10 and pretty easy to do as long as you are handy with a soldering iron

**coptermanic** · 03-01-2010, 01:34 PM

A case of changing a component and soldering a couple of wires?

**sacko** · 03-01-2010, 01:42 PM

See the regulator that has a square around it.

Unsolder the three legs and remove the old reg, replace with the new one..

**coptermanic** · 03-01-2010, 02:49 PM

Looks a lot bigger than the other one. Does it have to go somewhere else on wires? Is this the component?

http://www.dimensionengineering.com/DE-SW033.htm

**sacko** · 03-01-2010, 02:50 PM

It is bigger but fits perfectly.

Nope, it is soldered straight onto the board.

The two wires coming from the reg, is where the power comes from for the backlight.

**coptermanic** · 03-01-2010, 02:57 PM

Presumably this is the same from a UK site:

3.3V 1A Switching Voltage Regulator [DE-SW033] - £11.58 : Total Robots, Robotics, Control and Electronics Technology

**P-Trix** · 03-01-2010, 03:07 PM

Does this void the insurance cover as the tx will no longer be covered under the ce mark?

**Mike W** · 03-01-2010, 03:10 PM

Originally Posted by P-Trix

Does this void the insurance cover as the tx will no longer be covered under the ce mark?

I would have thought so as you are messing with the electronics inside the device and altering it from original

**Rctintin** · 03-01-2010, 11:48 PM

Originally Posted by P-Trix

Does this void the insurance cover as the tx will no longer be covered under the ce mark?

That could be interpreted in many ways really. I look at it like this- the CE mark is there for the output power of the Tx, and the frequency it transmits on. That has not been altered. What I did to my Tx, was to replace a very cheap component that wastes battery power by turning it into heat, and replaced it with a very good component that looks after my battery power.

If you don't want to risk it then you have a choice, don't do it. Like speeding really, it's your call. I'm happy to do it, as I don't see that I have impaired the reliability or safety of my Tx.

**Rctintin** · 03-01-2010, 11:51 PM

Originally Posted by coptermanic

Presumably this is the same from a UK site:

3.3V 1A Switching Voltage Regulator [DE-SW033] - £11.58 : Total Robots, Robotics, Control and Electronics Technology

Looks to be the very same one, except the ones I ordered from Dimension Engineering have clear heat shrink over them.

**Brian Gifford** · 04-01-2010, 10:58 AM

Originally Posted by Rctintin

That could be interpreted in many ways really. I look at it like this- the CE mark is there for the output power of the Tx, and the frequency it transmits on. That has not been altered. What I did to my Tx, was to replace a very cheap component that wastes battery power by turning it into heat, and replaced it with a very good component that looks after my battery power.

If you don't want to risk it then you have a choice, don't do it. Like speeding really, it's your call. I'm happy to do it, as I don't see that I have impaired the reliability or safety of my Tx.

I agree with Rob, here. I also think, tho, it depends on the competency of the person doing the mod. If you can demonstrate professional qualifications or experience, that shows that you are unlikely to have done anything danferous to the Tx.

Imagine the case, tho, of someone who can't solder properly soldering in a new regulator & making a dry joint, and the Tx fails when flying (say) a 90 size heli. That person would be stuffed!

My 2p worth.