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Ersa i-CON 1 soldering station display backlight replacement

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  1. Ersa i-CON 1 soldering station display backlight replacement, Remove the control knob: 步骤 1 中的图像 1,1
    在这个步骤中使用的工具:
    Spudger
    $3.99
    购买
    • Pull off the control knob using a nylon spudger.

    • Alternatively, a flat head screwdriver can be used, but be cautious of potential scratches on the metal faceplate.

  2. Ersa i-CON 1 soldering station display backlight replacement, Remove bottom screws: 步骤 2 中的图像 1,1
    在这个步骤中使用的工具:
    iFixit Precision 4 mm Screwdriver Bit
    $2.99
    购买
    • Flip the station over and remove the four T20 screws.

    • Flip the station back onto its base and lift the top cover up and off the station.

  3. Ersa i-CON 1 soldering station display backlight replacement, Remove display nuts: 步骤 3 中的图像 1,1
    • Use pliers or a wrench to unscrew the four plastic nuts holding the display in place.

  4. Ersa i-CON 1 soldering station display backlight replacement, Disconnect the display cable: 步骤 4 中的图像 1,1
    在这个步骤中使用的工具:
    Spudger
    $3.99
    购买
    • Carefully flip the display upwards.

    • Loosen the display connector by pushing up the small brown bars on both sides of the connector with a spudger or similar tool.

    • Pull the ribbon cable from the connector.

  5. Ersa i-CON 1 soldering station display backlight replacement, Locate the display backlight: 步骤 5 中的图像 1,2 Ersa i-CON 1 soldering station display backlight replacement, Locate the display backlight: 步骤 5 中的图像 2,2
    • The display backlight is hidden under white tape on the right side of the display.

    • The second photo shows markings on the display.

  6. Ersa i-CON 1 soldering station display backlight replacement, Remove cover tape: 步骤 6 中的图像 1,1
    • Carefully remove the white cover tape using a knife or similar tool.

    • Make sure the golden flexible circuit board strip doesn't bend upwards along with the cover tape!

  7. Ersa i-CON 1 soldering station display backlight replacement, Remove  cover tape: 步骤 7 中的图像 1,1
    • Use a knife or similar tool to hold down the circuit strip and unstick it from the cover tape.

    • If you choose to remove any strip glue residue with alcohol, be careful not to let it seep between various layers inside the display area, as this can cause unsightly spots to develop.

  8. Ersa i-CON 1 soldering station display backlight replacement, Unstick the circuit strip from the base: 步骤 8 中的图像 1,1
    • Use a knife or similar tool to carefully unstick the circuit strip from the plexiglass base.

    • The strip is held in place with a thin, transparent, double-sided tape. Be sure to keep the tape on the plexiglass base as you remove the strip. If the tape tears away with the strip, use the tip of the knife to push it back onto the plexiglass.

    • Try to bend the strip as little as possible to make it easier to seat back in properly later.

  9. Ersa i-CON 1 soldering station display backlight replacement, Desolder original backlight LEDs: 步骤 9 中的图像 1,1
    • Fold the circuit strip onto the back cover of the display and weigh it down. This will expose the faulty original LEDs and some resistors.

    • Before soldering, place heat-resistant material under the strip to prevent damage to the display's plastic back cover. If the plastic melts, it can cause unsightly spots. In the photo, several sheets of paper are used.

  10. Ersa i-CON 1 soldering station display backlight replacement, Backlight schematics: 步骤 10 中的图像 1,1
    • After analyzing the original backlight connections, it became clear why it fails: the Chinese designers who created the display wanted to save space and money by connecting the LEDs in parallel.

    • However, since each LED has a slightly different threshold voltage, one of them draws more current and fails prematurely. The remaining two LEDs then experience even higher currents and burn out soon afterwards.

    • To address this issue, I decided to change the connection according to the lower schematic. I shorted the original 22R resistors and put a 220R resistor in series with each new LED.

  11. Ersa i-CON 1 soldering station display backlight replacement, Solder in new components: 步骤 11 中的图像 1,1
    • There is enough room on the strip to solder in new LEDs (red arrows) along with their 220R resistors (green arrows) on the original solder pads.

    • Use resistors in the 0603 package to fit them into the available space.

    • Desolder the original 22R resistors and short their pads with a thin wire.

    • Verify that all three new LEDs work by connecting a 5V power supply onto the "A" and "K" pads on the strip.

  12. Ersa i-CON 1 soldering station display backlight replacement, Seat the strip back onto the display: 步骤 12 中的图像 1,1
    • Stick the circuit strip back onto the plexiglass base.

    • Keep in mind that the new components are slightly wider, so make sure the strip doesn't bulge or stick out anywhere. If the strip doesn't fit properly, unstick it and try a slightly different position until it sits flat and securely.

  13. Ersa i-CON 1 soldering station display backlight replacement, Secure the strip with new cover tape: 步骤 13 中的图像 1,1
    • Secure the strip in place with a new tape cover, such as brown electrical tape.

    • Ensure that the tape covers the strip completely and doesn't leave any gaps or exposed areas.

    • Reassemble the soldering station carefully and test the display to confirm that it's working properly.

  14. Ersa i-CON 1 soldering station display backlight replacement, Final result: 步骤 14 中的图像 1,1
    • Here you can see comparison of original (left) and new backlight (center). The new backlight is slightly brighter than the original; you can use larger resistors (270 or 330R instead of 220R) to lower the brightness.

    • I also experimented with general-purpose VLMW11R2S2-5K8L-08 omidirectional LEDs. You can see the result on the station on the right - the display is rather dim and there is significant backlight bleed on its right edge, where the LEDs are located. Thus I recommend to use only directional, right-angle LEDs like LTW-108DCG-HS10.

    • Since new LEDs need lower current to achieve similar light output, they should outlast the soldering station. This "trick" is generally applicable; high-brightness LEDs always generate more light at 2 mA than ordinary LEDs at 20 mA. At the same time, they consume less power, generate less heat and last much longer.

    Really great job!! I have similar problem. But when I strip soldering station I can see that those LED are still working. I can see light on them and around screen. Any idea, any help, please

    Mr P W Wojcik - 回复

    If the backlight works, but the display is not legible, then your contrast setting may be wrong. It's somewhere in the config menu, check the user manual. There is also some way to reset all settings to default values, but I don't remember how.

    Pavel Hanak -

    The display can be found on DigiKey; drop in replacement for $18 USD.

    https://www.digikey.com/en/products/deta...

    D. Clark - 回复

结论

To reassemble your device, follow these instructions in reverse order.

6等其他人完成本指南。

Pavel Hanak

于12/08/16注册

653 声望

创作了2篇指南

7条评论

Thanks a ton. We have ~20 units in our facility and experiencing the same issue. I feel like writing a preventive action to ERSA. I've followed your steps, bought the LEDs and found some 120ohm (0603) resistors laying around. You are pretty accurate on the time. It's about 20mins after you get the first couple done. The results are night and day (pun intended...lol). I do like the irons and they work great, but just one drawback is the display design. Huge cost savings to do them yourself, but you need to have a light hand, and don't burn anything. I used 3 layer paper under the circuit, exacto blade and tweezers to peel the tape back. The recommended LED part number (LTW-108xxx) works great. Thanks for this awesome money saver, our employees are happy they can see the display again. You Rock!

Dave Johnson - 回复

Thank you for your detailled walktrough.

I have found two types of screen on my ersa icon1. Lucky me one of the screens had a sticker with the model identification and is equal to your screen. =)

The model is ES13BB0BMW, manufactured by EMERGING DISPLAY TECHNOLOGIES CORP.

The only place I could find it for sale was here:

https://www.questcomp.com/part/4/ES13BB0...

But i am still waiting for a quote, because unfortunly my screen is dead.

You can also find a link to the datasheet on the above link.

I attemped connecting the other screen, the different one, and found it to no work properly on the pcb. The text gets faint. Dont know why yet.

Ricardo Heleno - 回复

Hello Again,

I have just found the other display version. Is quite easy to find on the web.

AMG12864PR-G-B12WTDW

http://www.orientlcd.com/mobile/Product....

On the above link you can also find the datasheets.

It also looks like someone already figured it out befor me.

https://www.eevblog.com/forum/repair/rep...

However altough thee pcb is the same, there are some differences on the mounted components. A direct compatibility can not be possible.. Maybe even software is different.. I will walk through the displays datasheets and see what might be needed to ensure compatibility between the two versions.

If I can pull it out I will maybe do a walkthrough in this.

Ricardo Heleno - 回复

The LCD controller is the same on both LCDs .. SITRONIX7565P , meaning that software should be compatible.

Ricardo Heleno -

The display from Orient is confirmed to work just by direct replacement. =)

Ricardo Heleno -

A week ago I got a newer i-Con station with failed backlight, but the flexible PCB strip for the LEDs was different. The LED pads were much smaller and the PCB was covered with white silkscreen. Due to smaller pads, I tried to solder in LEDs with 0402 package resistors, but the LEDs didn’t work, because the minuscule PCB vias broke when I manipulated with the strip. The display had different marking too, here are some photos, so you know which displays to avoid:

https://imgur.com/YeBI2US

https://imgur.com/PDuQYTv

In the end, I bought replacement displays, but I bought them via Digikey, because they had much smaller shipping costs to Europe:

https://www.digikey.cz/product-detail/en...

Pavel Hanak - 回复

Hmm, I see the original Digikey link is dead. The display has part number AMG12864PR-G-B12WTDW

Pavel Hanak -

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