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crwdns2944351:0crwdnd2944351:0Ubiquiti UniFi AP AC Lite TVS Diode Replacementcrwdnd2944351:0crwdne2944351:0

crwdns2933797:0Yang Zhaocrwdnd2933797:0crwdne2933797:0

crwdns2936043:0crwdne2936043:0 crwdns2933505:0crwdne2933505:0 Yang Zhao

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Ubiquiti UniFi AP AC Lite
Type
replacement
Thing
TVS Diode
Title
Ubiquiti UniFi AP AC Lite TVS Diode Replacement
Introduction
This guide outlines steps needed to repair an Ubiquiti Unifi AP AC Lite (model UAP-AC-LITE) access point which '''does not power on''', and is identified by the PoE injector has having a power fault. (Blinking white on the PoE injector.)
The UAP-AC-LITE contains an over-voltage protection circuit driven by a unidirectional TVS diode. While this diode is not a fuse, it's expected failure mode is to short, and diverts all power away from the rest of the hardware. This also is detected by the PoE injector, which shuts off power entirely.
In this guide will show how to:
# Disassemble the UAP-AC-LITE
# Test if the over voltage protection TVS diode has failed
# Remove and replace the broken diode
Time Required Min
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Time Required Max
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Imageid
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Difficulty
Moderate
Conclusion
To reassemble your device, follow these instructions in reverse order.
Author
Yang Zhao
Public
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  • In Progress added.
  • Community-Contributed Guide added.

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