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6.5.2. REPLACING FINGERPRINT READER’S BATTERY
If you start to see “BL” message on fingerprint reader’s display, you need to replace
the batteries. Get 2x AAA Alkaline (or 1,5V Lithium Batteries) and follow steps below:
- Unscrew back plate screw. Hold fingerprint reader from bottom part, pull and lift up to detach
it from back plate.
- Replace the battery with new one. Watch the polarities!
- Attach fingerprint reader to back plate and tighten the screw.
Back Plate
Screw
DESi
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