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--- skyperdescription [2019/04/16 16:45]
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+++ skyperdescription [2019/06/16 19:50]
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@@ Zeile 76: / Zeile 76: @@
 {{ :skyper:upgrom.jpg?direct&600 |}}
-==== Removing the display from the PCB ====
+===== Removing the display from the case =====
-lorem ipsum
+The display is mounted in the case with clips. You can use a small screwdriver to *carefully* pull away the case from the display and lift the display (each side after each other)
+{{ :skyper:skyperoeffen0.jpg?400 |}}
+{{ :skyper:skyperoeffen1.jpg?400 |}}
+{{ :skyper:skyperoeffen2.jpg?400 |}}
+{{ :skyper:skyperoeffen3.jpg?400 |}}
+{{ :skyper:skyperoeffen4.jpg?400 |}}
+Photos courtesy DK7TD
+===== Preset of display contrast =====
+Have you ever asked yourself what this tiny trimpot on the rear side of the display board does?
+Well if your display is working fine and contrast setting can be done via setup menu there is
+probably no need to.
+The initial setting was done by the manufacturer and normally this should work all right.
+In case you have trouble with your display contrast it may be helpful to check this alignment according to the picture shown below.
+Turning this trimpot clockwise will increase display contrast while turning counterclockwise will decrease it.
+Please be aware that this is a very coarse setting. This SMD-trimpot has no upper or lower limitations. It can be turned around the full 360 deg.
+The fine adjustment is done afterwards in the Skyper setup menu using the up and down keys.
+{{:p4240071.jpg|}}
+===== Separating the display board from the case =====
+In case you have trouble with the silicone rubber keyboard or with the microswitches underneath
+you may want to take display board and case of your Skyper apart.
+Another reason to do this may be that you want to clean the display and case from the inside.
+{{:p6160003y.jpg|}}
+Of course you can do this the way DK7TD describes it using a small screwdriver.
+If you are unlucky you may end up with a display where some lines of pixels are missing
+when you power up your Skyper afterwards.
+What has happened? While pulling out the display board this way the flexible board connector
+atop of the LCD display may move and some pins can get loose.
+Should this ever happen there is no way to fix this.
+{{:p6160026y.jpg|}}
+After experiencing this twice up to now (I have modified >20 Skyper) I asked myself:
+Is there a safer way to work on the display board?
+YES there is one.
+You can fix the LCD to the display board applying a few drops of 2K glue at the positions
+shown below.
+After hardening for some hours you can pull out the board using a simple smartphone
+opening tool at the two shown positions.
+One tool is enough - you don't need two of them.
+{{:p6160081z.jpg|}}
+{{:p6160091y.jpg|}}
+If you did the soldering and the modification on the RF board of your Skyper yourself
+it should be no problem for you to get the old microswitches out and new ones in.
+For me it was difficult to get them here in Germany. The dimensions are listed below.
+I found them on eBay. They are quite inexpensive even if you have to order 100 pcs.
+In my opinion its a good idea to replace all 4 microswitches even if only one
+is faulty. So the look and feel is the same on all 4 keys afterwards.
+{{:p6160079y.jpg|}}
+{{:smd_kurzhub_mikroschalter.jpg|}}

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