exrace Show full post »
cjin
I removed the display from the control board to check its part number. Turns out it is just an off the shelf LCD made by Newhaven Display, part number NHD-C0220AZ-FSW-FTW.

So a $10 part from Mouser and half an hour with a soldering iron later, the display works like new again. Most of that time was actually spent removing the LCD from the circuit board by wicking solder off all its 14 pins so it can be removed without breaking, in case I had to reinstall it. Had I do it again, I'd just cut all the pins so they can be unsoldered individually a lot faster.

For those who don't want to touch a soldering iron, I also found a company called Flight Systems. They can repair control board (for various problems, not just bad LCD) for a fraction of the cost of a new one.
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UPS
cjin;46253 wrote:
I removed the display from the control board to check its part number. Turns out it is just an off the shelf LCD made by Newhaven Display, part number NHD-C0220AZ-FSW-FTW.

So a $10 part from Mouser and half an hour with a soldering iron later, the display works like new again. Most of that time was actually spent removing the LCD from the circuit board by wicking solder off all its 14 pins so it can be removed without breaking, in case I had to reinstall it. Had I do it again, I'd just cut all the pins so they can be unsoldered individually a lot faster.

For those who don't want to touch a soldering iron, I also found a company called Flight Systems. They can repair control board (for various problems, not just bad LCD) for a fraction of the cost of a new one.

That's good info to save. Probably few folks have removed a bad one to look for markings.
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exrace
I was just going to order a controller to replace along with the battery, oil and filter to prep for another season and found this response. Thanks for posting to this old thread!
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exrace
I confirmed the heat is coming from the LCD display component.
The display stands off the main circuit board and heats up within minutes of power being applied.
I have ordered the LCD component from [COLOR=black][FONT="Verdana"][B]Mouser.[/B][/FONT][/COLOR]
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exrace
My replacement LCD surgery went well.
I ended up cutting the pins off the old LCD as the LCD display and the "heater" separated from each other and was not worth trying to save. I also temporarily detached the standup pins from the circuit board so I could gain access to the bottom of the circuit board to cleanup up the old solder using a wicking strip and touch up the solder points from that side.
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Warren
A hearty thank-you to cjin (post #26 of this thread) for providing the part number of the LCD and the hint about clipping the pins. While the display was unavailable from Mouser, I got one for $10.62 from Onlinecomponents.com. (+shipping). The repair was successful, but it is worth noting that removing the old display and soldering in the new one took about four hours. The key hassle was the need to do all of the work from the top of the board on which the LCD is inserted. To completely remove that top board (connected to the control board immediately below it) would have required disordering the 16 or so pins connecting the two boards and risking collateral damage. In the future, however, that might be the way to go.
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exrace
My repair is still working but some notes from the field.

I mentioned the LCD heater in my previous post.

Very possible the "heater" part of the LCD display component is part of the issue.
Not sure what voltage should be present on that component but that might be overheating the display when the ambient temperature is above 50 degrees.
I can see why this heat would be needed when the outside temperature is -5 but I believe the heater is supplied a voltage that is out of spec.

Here is my workaround for now.
If I need to look at details I pop the fuse out and let the controller cool off about 15 minutes.
When the controller powers back up the system will prompt with the startup wizard and ask for the date/time.
[LEFT][COLOR=#000000][FONT=Helvetica][SIZE=13px]All other settings are saved. [/SIZE][/FONT][/COLOR][/LEFT]

The display is readable for a while but after a few hours the controller builds enough heat to make the display hard to read.
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