Replacing a blown fuse

The WB5500 uses SMD Fuse 3A slow blow type fuses. An extra one is provided on the back of the main board and is used for the optional rechargeable battery.

To replace a blown fuse:

  1. Disconnect the clock from the power supply before opening.
  2. Remove the screw on the bottom of the clock.
  3. Lift off the front of the clock.
  4. Disconnect the cables from the main board.
  5. Lift the fuse cover.
  6. Replace the fuse.
  7. Reassemble the clock in reverse order.
  8. Reconnect the clock to the power source.