Replace faultly digit - iFixit Repair Guide

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Introduction

Digits are enlighted by leds. After a while, some led intensity decrease or goes into short circuit. Let see how to replace the led.

Step 1 Display digit

Replace faultly digit, Display digit: step 1, image 1 of 3

Replace faultly digit, Display digit: step 1, image 2 of 3

Replace faultly digit, Display digit: step 1, image 3 of 3

Unplug the power supply from the wall, remove batteries.
Unscrew x7 and open the device by unlocking the plastic clip on the bottom face.
On the rear of the display panel, unscrew x2 and unclip the flat cable.

Step 2

Replace faultly digit: step 2, image 1 of 3

Replace faultly digit: step 2, image 2 of 3

Replace faultly digit: step 2, image 3 of 3

We want to separate the digit support from the PCB to access the leds.
On the back, mill the white clips to free the PCB from the digit support. I used a Dremel like tool.

Step 3

Replace faultly digit: step 3, image 1 of 2

Replace faultly digit: step 3, image 2 of 2

You can test the leds by plug in the flat cable. Be carefull of high voltage.
In my case, I had to replace the 2B led. Locate the green mark before unsoldering the led. Green mark goes to the driver chip.
To buy leds, search Internet with key words : white led smd 0603

Step 4

Once done, you can try the led fix and reassemble the device.

Conclusion

Pour réassembler votre appareil, suivez les instructions dans l'ordre inverse.

Author

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Pierre Le Gargasson

Member since: 12/17/21

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