Commit 4d4d53a1 authored by Sophia's avatar Sophia
Browse files

create upkeep section, move display repair there

parent f4684553
Pipeline #3916 passed with stage
in 34 seconds
......@@ -42,56 +42,17 @@ The display has a polarizing filter on. With the protective foil stuck on top, t
## What can I do if the filesystem of my badge is read-only?
tl;dr: `fsck`
One possible reason for a read-only filesystem is a set "dirty-bit".
To change this the linux tool fsck can be used.
One possible reason for a read-only filesystem is a set "dirty-bit".
To change this the linux tool fsck can be used.
First the badge needs to be ejected safely, then it needs to be restartet and put back into "USB storage" mode.
The device should not be mounted. Now `lsblk` can help with finding the correct blockdevice.
Then you can check the filesystem with `fsck /dev/sdX` (replace `sdX` with the correct device).
If neccessary the tool will ask if the "dirty bit" should be removed, this needs to be answered with yes.
If neccessary the tool will ask if the "dirty bit" should be removed, this needs to be answered with yes.
After this, the problem should be solved.
## Help! My Display is not working / it cracked
During camp we discovered that the badge display is one of the parts that easily gets damaged.
If you get a crack due to a mechanical crash or similar incident you have to replace your display.
This guidance shows you how to do this:
## Help! My Display is not working / it cracked
During camp we discovered that the badge display is one of the parts that easily gets damaged.
If you get a crack due to a mechanical crash or similar incident you have to replace your display.
The [upkeep](/en/upkeep/_index) section of card10logix includes a [guide for display replacement](/en/upkeep/display).
**Step 0:** Disconnect the battery with a pair of tweezers.
**Step 1:** The display sticks to the Harmonic board with two small double sided glue points (like the one you placed on
the backside to mount your battery). So careful lift the broken display with a pair of tweezers from the right side upwards.
Make sure that you under no circumstances lift the display to an extent so that the flex PCB of the display rips off
one or more solder pads from the harmonic PCB. Otherwise you would not be able to rework your Harmonic!
**Step 2:** Carefully remove the glue points from the Harmonic PCB.
**Step 3:** Apply a larger amount of solder with your solder iron. For this step you want to use your largest
solder tip. Try to apply heat to all pins of the flex pcb at the same time. Slowly and carefully apply an
upward force to lift the flex pcb. If all of the pins are heated the flex pcb will come off the Harmonic board.
**Step 4:** Use a desolder wire to remove the rest of the solder from the Harmonic pcb. Be careful and make
sure not to damage the board by ripping off one of the pads.
**Step 5:** Place your new display in the right orientation onto your Harmonic board. Make sure that the small
holes of the display flex pcb and the Harmonic board pcb align. At this stage the metal can part of the display
(bottom side) will point upwards.
**Step 6:** Apply solder on the display flex pcb pins.
**Step 7:** Visually check the connections and make sure that there are no shorts between the pins.
**Step 8:** Apply two glue points to the Harmonic pcb (one directly over the blanc pins of the flex pcb to
isolate them to the metal can of the display and one on the right side of the display pcb marking). If you don't
have those glue points we used, you also can make use of standard double-sided tape.
**Step 9:** Flip the display over end carefully press the display to the Harmonic pcb. Make sure that the
force does not destroy the LCD. You can apply the force at the edges of the display. Also make sure that the LCD is
in its right position and aligned with the rectangle on the pcb. It's easy to produce shorts on the components on the
right edge of the LCD.
**Step 10:** Connect the battery and switch on the badge
The LCD can be bought at AliExpress: https://de.aliexpress.com/item/4000018872259.html
---
title: Upkeep
---
An important aspect of open hardware is that you have the information you need so you can fix it - if you have the skills to do so.
In this section hopefully we can collectively gather information and tutorials so all of us can enjoy our card10s for as long as possible!
---
title: Display repair and replacement
---
All card10 displays were hand soldered by volunteers, many directly at cccamp2019 - impressive, right?!
On the other hand, if untrained volunteers were able to do it, you can probably learn how to solder a card10 display, too!
If you have little soldering experience, it might still be good to find someone with a bit of experience to guide you a bit.
Another consequence of the hand soldered displays: Particularly if your display never worked properly and is not visibly damaged,
there is a good chance it
has a bad solder connection. So if your display appears broken, you might be able to fix it by just re-doing the solder connection.
This guidance shows you how to check your display, do this:
**Step 0:** Disassemble your card10 by removing the screws on the top PCB with a T6 screwdriver and gently pulling up the harmonic board.
Disconnect the battery with a pair of tweezers.
**Step 1:** The display sticks to the Harmonic board with two small double sided glue points (like the one you placed on
the backside to mount your battery). So careful lift the broken display with a pair of tweezers from the right side upwards.
Make sure that you under no circumstances lift the display to an extent so that the flex PCB of the display rips off
one or more solder pads from the harmonic PCB. Otherwise you would not be able to rework your Harmonic!
**Step 2:** Carefully remove the glue points from the Harmonic PCB.
If your display is not physically broken, now is a good time to check what the solder connection looks like.
If the solder connection looks bad, continue in section **Fix bad solder connection**, otherwise continue with **replacement**
### Fix bad solder connection
**Step 3:**
TODO
### Replacement
**Step 3:** Apply a larger amount of solder with your solder iron. For this step you want to use your largest
solder tip. Try to apply heat to all pins of the flex pcb at the same time. Slowly and carefully apply an
upward force to lift the flex pcb. If all of the pins are heated the flex pcb will come off the Harmonic board.
**Step 4:** Use a desolder wire to remove the rest of the solder from the Harmonic pcb. Be careful and make
sure not to damage the board by ripping off one of the pads.
**Step 5:** Place your new display in the right orientation onto your Harmonic board. Make sure that the small
holes of the display flex pcb and the Harmonic board pcb align. At this stage the metal can part of the display
(bottom side) will point upwards.
**Step 6:** Apply solder on the display flex pcb pins.
**Step 7:** Visually check the connections and make sure that there are no shorts between the pins.
**Step 8:** Apply two glue points to the Harmonic pcb (one directly over the blanc pins of the flex pcb to
isolate them to the metal can of the display and one on the right side of the display pcb marking). If you don't
have those glue points we used, you also can make use of standard double-sided tape.
**Step 9:** Flip the display over end carefully press the display to the Harmonic pcb. Make sure that the
force does not destroy the LCD. You can apply the force at the edges of the display. Also make sure that the LCD is
in its right position and aligned with the rectangle on the pcb. It's easy to produce shorts on the components on the
right edge of the LCD.
**Step 10:** Connect the battery and switch on the badge
The LCD can be bought at AliExpress: https://de.aliexpress.com/item/4000018872259.html
### tl;dr
**Parts needed**
Glue dots or double sided tape; replacement LCD, e.g. from AliExpress: https://de.aliexpress.com/item/4000018872259.html
**Step 0:** Disconnect the battery with a pair of tweezers.
**Step 1:** Carefully lift the broken display with a pair of tweezers from the right side upwards.
Make sure you don't rips off
one or more solder pads from the harmonic PCB. Otherwise you will not be able to rework your Harmonic!
**Step 2:** Remove the glue points from the Harmonic PCB.
**Step 3:** Apply a larger amount of solder with your solder iron with your largest
solder tip. Try to apply heat to all pins of the flex pcb at the same time. Slowly and carefully apply an
upward force to lift the flex pcb. If all of the pins are heated, the flex pcb will come off the Harmonic board.
**Step 4:** Use a desolder wire to remove the rest of the solder from the Harmonic pcb. Again, avoid ripping off one of the pads.
**Step 5:** Place your new display in the right orientation onto your Harmonic board. Make sure that the small
holes of the display flex pcb and the Harmonic board pcb align. At this stage the metal part of the display
(bottom side) will point upwards.
**Step 6:** Apply solder on the display flex pcb pins.
**Step 7:** Visually check the connections and make sure that there are no shorts between the pins.
**Step 8:** Use glue points or double sided tape to attach the display. Make sure to cover the blank pins of the flex pcb
with the points/tape to isolate them.
**Step 9:** Flip the display over, carefully press the display to the Harmonic pcb, ensure correct alignment to avoid
shorting other components on the PCB.
**Step 10:** Connect the battery and switch on the badge
Markdown is supported
0% or .
You are about to add 0 people to the discussion. Proceed with caution.
Finish editing this message first!
Please register or to comment