Monthly Archives: November 2016

Product Testing

Product testing

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This category will be for various electronics and other products Ive bought to use or am selling, and my experience and reviews on them. Products such as tiny boost converters for example are often advertised as being far better than they really are, so this seems a good place and opportunity to share my experiences with things such as that.

At the same time its also a good place to explain items i sell and am familiar with, in a way different to my ebay store or what would be considered acceptable there. Products i have in mind for this are spark gap igniters and my various special effects pigments.

Ill be posting photos and where appropriate, video of each tested item. Also where relevant, screenshots from my oscilloscope, such as to indicate whether a boost converter or other device is producing stable output, or anything else a scope might be good to read.

 

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Didn’t tell me much

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I’m not going to post any photos, no point, the laptop screen lens takes light traveling up the screen and diffuses it, instead of directly at it. The light enters the side of a special acrylic lens and turns it into lines of light which the other lenses turn into solid white.
What I have learned from this however is, it’s possible that the backlight might only be 1 or 2 tubes, if it uses the same kind of lens although I doubt this.

I’ll continue with taking apart the monitor today once I have all my other work done for the day.

 

-Edit-
I forgot to mention this but, for anyone reading, this process should apply to pretty much any monitor if you want to replace the backlight with LEDs, though your experience may vary with how the system deals with a missing or disabled inverter board. In all likelyhood though itle probably just be PWM controlled. Worst case you install a knob with your own controller and use the internal 12v supply.

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Wacom 24HD repair project

Practice disassembly

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Practice disassembly

From time to time or more regularly ill give entries titles for the sake of the wordpress logs.

It occurred to me on an unrelated subject that I was concerning myself over the specifications of a raspberry pi to use in my car when I already had a junked netbook which besides the cracked screen worked fine and would work fine as a superior capable replacement that could be trusted with something data intensive like higher resolution dash cam use.

Continue reading Practice disassembly →

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Wacom 24HD repair project

Finding a way to separate the backplate

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I opened the Wacom up and begun unpeeling some of the protective tape holding the screen together, I also undid some screws, I found that the 4 black screws around the monitor hold it onto the plastic frame, also, two metal rails cover the top and bottom of the screen and are glued to the underside of the plastic screen that you write on. Attempting to remove it for better access may cause serious damage to the LCD indirectly.

Continue reading Finding a way to separate the backplate →

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Second HD image test with in-blog editing

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This time im writing within the wordpress site which i think is how its going to have to work from now on, ill see what happens when i upload a high resolution image, ideally id want it to be accessible to readers in its raw massive state, which is about 3000x2000px, at best all i can get is half that with automatic processing, plus, i have to tell word not to compress photos every single time i do this.

test

this is the second image below after editing the htaccess file to allow 5mb image files

dsc_0077

 

 

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Wacom 24HD repair project

Some thoughts on the project (rev 1)

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For this entry I don’t have much to say progress wise though I do have some new thoughts worth mentioning. Many people claim that a new power supply momentarily fixes the issue, this may be because the new supply has been fried like the old one was, or, the new supply is handling the HV leakage differently, so progression of the tube degeneration has eventually caught up with the new supply also.

Continue reading Some thoughts on the project (rev 1) →

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Wacom 24HD repair project

Entry 0

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The problem observed is that the Wacom monitor fails to turn on properly. When the power button is pressed it boots up normally and displays an image for about a second, then the screen goes black and appears as though the monitor has failed, however all the other lights are still on and the computer still recognizes the monitor as being active. Shining a light on the monitor shows that an image is still there, just the backlight has failed.

Continue reading Entry 0 →

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Wacom 24HD repair project

Wacom Repair Project

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Summary:

This project is about identifying the causes and repairing the issues with the Wacom 24HD tablet monitor. The problems largely involve how the monitor sometimes will not start. As of the beginning of this workbook numerous causes and solutions have been identified and will be mentioned in the first entry, which combines all the information acquired in what would have been every prior entry.

Problem:

The Wacom 24HD tablet monitor works normally for 1-2 seconds when powered on before the backlight powers off.

 

Sources and references:

https://forums.whirlpool.net.au/forum-replies.cfm?t=2554463

 

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