Question about Casio Cassiopeia E-115

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Replaced my Casio E115 screen - now touchscreen doesn't work!

I inherited a Casio E115 with a shattered screen. I carefully removed the LCD and touch screen (both were shattered, but the rest of the unit was fine). I took a working LCD and touch screen from a fully functional Casio E105 and installed it into the E115. Now the LCD display is fine on the E115, but the touch screen doesn't work! I touch it, and nothing happens - it doesn't register. I have the 4-connector touch-screen cable plugged in properly. Does anybody have any ideas of what might be wrong? Are the touch screens on the E105 and E115 just incompatible? I noticed a small metallic sliver that was screwed to the plastic chassis that the display sits in. Does the touch display have to be touching this to close some kind of resistive circuit? It doesn't seem to touch it - I don't really know if that matters.

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Re: Replaced my Casio E115 screen - now touchscreen...

There are 2 things you have to check for. The touch screen was changed in the middle of production run. The flexible connector & the corresponding socket on the main board were inverted. In other words the exposed track side was moved from upper to lower side. The older type of touch scrteen is no longer available. Casio made the socket available to their service centre to change in on the main board to suit the newer type of touch screen. If this is the case you will have to get the newer type touch screen to suit the E-115. The second aspect is that there are 4 self adhesive spacer tapes (approximately 3 mm x 80 mm x 0.5mm thick on the long side & 3 mm x 60 mm x .5 mm on ythe short side) on the periphery of the LCD. This is to keep the touch screen from touching the LCD. This is to prevent Newton's rings as also to prevent malfunction of the touch screen. These are an absolute must. Other than that the touch screens are absolutely the same. Hope this helps.

Posted on Sep 05, 2005

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My touch is'nt work and hardreset is'nt working!


hi,

Does your unit still works even without using touchscreen?

Since you already do hard reset and still it does'nt work. then chances are you have a defective touch screen, probably it is cause by an impact of any kind and produce a crack inside or if your luck, the touch screen flex get loose inside.

here is what you can do if your phone does'nt have any warranty anymore cause opening your phone can forfeit your warrany.

Open tour phone slowly and secure the screw to a safe place and also remember where and how to place the parts you remove. Be extra carefull for the LCD. the touch screen is just above the LCD. Some manufacturers include the touch screen to the LCD and some are separate. You can check visually is there is cracks on the touch screen and also check its flex connector if it is ok.

You can purchase touchscreen, LCD or Both at ebay. be sure that the right model is what you order.

Hope I helped you in some other way.
Don't forget to rate me, Thanks...

Regards,
john

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Then the touchscreen is most likely faulty and would need to be replaced, unfortunately you may have to replace the entire screen as it may be difficult to remove the digitizer from the top of the lcd display if its glued in.

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YOU KNOW WHAT GUYS, I HAVE THE SAME PROBLEM. I WENT TO THE REPAIR SHOP IN SONYERICSSON AND THEY TOLD ME THAT THIS IS THE MAIN SICKNESS OF TOUCHSCREEN PHONE. IF YOUR PLANNING TO BUY TOUCHSCREEN PHONES BE SURE TO TAKE CARE OF IT EXTREMELY...

THE BEST SOLUTION IS THAT , IF YOU STILL HAVE THE WARRANTY CARD OF YOUR PHONE BETTER GIVE THE PHONE BACK TO THE MANUFACTURER BECAUSE THIS IS A UNIT ERROR...

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Hello. There's a special adhesive attached to the back of the touchscreen that allows it to be attached to the LCD screen. You will need to start prying it off the LCD screen very slowly, working from one corner and slowly peeling it back with the use of an x-acto knife, or other sharp-bladed knife. You must be very careful as it's very easy to permanently damage the LCD screen underneath. I suspect your touchscreen stopped working, hence the need to replace it. Good luck.

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There is no need to replace the whloe lcdscreen, you just need to replace the touch screen & panel which is a thin glasstop on the top of the lcdscreen. The whole lcdscreen is expensive, while a touch panel is much cheaper than that. And we could provide all kinds of PDA accessories. Here are some information for you In general, PDA LCD screen comprises the touch screen. LCD screen acts as a display of PDA or SmartPhone, and the likes, which cannot go without LCD screen. Touch screen is short for touch screen digitizer which seizes the upper part of PDA LCD screen. It is pressure-tactile, runs with gentle touch of stylus, finger and other tele-pointing function-possessed device. Different from LCD screen, the touch screen is an optional component for PDA, SmartPhone, and the likes. A PDA can function well even without the assembling of a touch screen for the availability of keyboard.

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1 Answer

Self Repairing the K-jam


I have just replaced the touchscreen on my wife's K-Jam, not a trivial job but not as impossible as some postings I had read. Also I was able to replace just the touchscreen and not the combined LCD/touchscreen which most people have said you have to. Basically you need to start from the back of the PDA (battery side) and work forwards with the last thing you get to being the touchscreen you need to replace. I do not recall exact order of dismantling but it was fairly obvious once you got into it. I started with the sliding keyboard closed for this. What I do remember is that to start off you have to remove a snap on cover above the camera, removing the external area connector cover first and then gently prising with a jewellers screwdriver. Then remove 4 screws and gently prize the main unit into two. (Obviously at this stage battery, SD card, etc are all out). You will find on one side the unit the two parts are now joined by a small flexible PCB, this is into a connector which you can release by very carefully lifting up a small plastic tab along the top of the connector (note this is different to some connectors I have seen like this where you have to slide a section of connector out - on this one (and one you come across later) you have to flip the plastic tab up by 90 degrees. Once you have done this you can carefully pull out the flexible PCB. This phone is very layered and I found it help to put each 'layer' in a bag with it's associated screws, etc to make life easier later. You are now left looking at the main phone PCB which if I remember right will now be loose. Carefully lift and remove the PCB. you will find it attached by a flexible PCB that goes to the display unit - this is a push in connector which can be carefully removed by gentle prising. You now have just the display unit and the back part of the main unit. Slide the keyboard slightly out and then remove the 4 screws which secure the main unit to the sliders. You should then be able to separate the screen unit from the main unit and finally get to the fixing screws you need. Undo the 4 screws that hold the screen unit together. The rear of the screen unit is still clipped in place and you need gentle prising to remove the back from the screen. Memory begins to fail me here but again I think there were 4 screws securing 2 small PCBs for the lights and the navigation buttons which I removed and removed the PCBs and the navigation button block. Somewhere in all of this there was also a second slightly larger version of the flexible PCB connector that required its tab lifting 90degrees to remove the connector. You should now be able to lift out the LCD and touchscreen as one unit - and now comes the fun bit. The touchscreen is bonded to the LCD and the connector for it is resistance welded to another flexible PCB. I first (and very carefully) lifted the sticky tape that is protecting this connection. I then (even more carefully!) cut the ribbon that goes to the touchscreen leaving a tab attached to the screen. By very careful lifting it was then possible to get the 4 way flexible PCB that goes to the touchscreen to separate from the main section without damaging what was left - if you have a hot air gun with a micro nozzle that may be an alternative. To separate the touchscreen from the LCD I used a sharp scalpel to gradually cut between the glass of the touchscreen and the bezel of the LCD - it is only glued to the bezel and not the LCD itself but be very careful not to damage the LCD surface. After a lot of careful sliding around all sides with the scalpel the touchscreen came off in one bit. I then positioned the new touchscreen and used what was left of the original double sided tape on the bezel to hold it in place (after removing the protective film from the toucscreen). If you cannot get the touchscreen off neatly you may end up having to carefully scrape the bezel clean and then use new double sided tape - goes without saying do not touch the LCD surface. Now you need to connect the new 4way flexible PCB from the touchscreen to the main LCD unit. For this I first taped it in the correct position, leaving the end to be connected exposed - NOTE for the touchscreen I sourced (from Hong Kong) the connector pitch was slightly out but there were positions where the connectors lined up but did not short out. Really scary bit - using a VERY small tipped soldering iron and low melting point solder and VERY short application times I was able to remake the connections onto the new flexible PCB for the touchscreen. Basic technique was to get the solder on the old part of the connection on the main LCD to flow and then dab in a little fillet of solder. Again if you have a miniature hot air gun it may be possible as well. Check you have continuity on all 4 and no shorts and then re-assembly is a reversal of the above. Nothing too tricky in re-assembly but getting the connectors back in before flicking the tabs back down is a bit of a fiddle. All a little scary but in my case the repaired unit is now working fine. The main risk is that you damage the LCD unit either when separating the touchscreen or soldering the connector (which is a little bit of a fudge to be honest but works). However given that any official repairer will replace the LCD and touchscreen anyway you don't have that much too lose - especially as the official repairer told me they have no parts to repair it with anyway til at least December. If this sounds too tricky or if you do damage your screen there is someone on ebay selling combined LCD/touchscreen assemblies for about £70 and offering a fitting service (although to be honest fitting a combined unit is fairly trivial as long as you are careful. Hope this helps, Russell

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2 Answers

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I believe if you are hardy with this sort of thing you can order a new touch pad from Global Products or www.pacparts.com. The e-115 , e125 and others all the same. Mine is coming from Global now item # 10003145 @ $28.00 I believe. I will know more when mine arrives. The case is not to hard to crack open just be careful. Once the case is open and motherboard freed turn the mb. over from case. The touch pad removes very easily one ribbon connector and one tape. Tear down pictures @ www.hi-pda.com/usercomment/001215/1.jpg. Be careful to have static band or discharge don't touch except edges and plastic of compact flash. It will take a little work but it is the cheap way. Dick

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1 Answer

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They are in fact very easy to replace if you: 1. Are very careful not to damage the other parts 2. Can find a replacement Understand that the screen is actually two different components, first there is the digitizer which is the part that senses your touching the stylus part. It is a clear glass plate that sits in front of the color lcd unit (the other part). If only the glass is broken, then replacing the digitizer is a cinch. If I remember correctly, the digitizer on the EM-500 is the same as the digitizer as on an E-125. You'll have to check to be sure though. Anyway, it is not too hard, just needs steady, careful hands...and it helps to have a little experience taking these things apart...

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