crwdns2915892:0crwdne2915892:0
Digits are enlighted by leds. After a while, some led intensity decrease or goes into short circuit. Let see how to replace the led.
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Unplug the power supply from the wall, remove batteries.
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Unscrew x7 and open the device by unlocking the plastic clip on the bottom face.
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On the rear of the display panel, unscrew x2 and unclip the flat cable.
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We want to separate the digit support from the PCB to access the leds.
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On the back, mill the white clips to free the PCB from the digit support. I used a Dremel like tool.
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You can test the leds by plug in the flat cable. Be carefull of high voltage.
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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.
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To buy leds, search Internet with key words : white led smd 0603
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Once done, you can try the led fix and reassemble the device.
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Pour réassembler votre appareil, suivez les instructions dans l'ordre inverse.
Pour réassembler votre appareil, suivez les instructions dans l'ordre inverse.
