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Troubleshoot fluorescent tube lighting

When a neon tube starts to flash, or it refuses to light, several causes are to be considered. Generally, just replace the tube itself and / or the choke, small component of a low price. On the other hand, if it is the ballast that is in question, it is better, often, to replace the lighting itself (except to recover one on an old device).

Replacement of fluorescent tube and choke

In principle, the grid must be pushed upward to undo the wire hooks that hold it.

Remove the grid

1. After having cut off the power of the circuit concerned, remove the protective grid from the tubes.
Undo the hooks holding the grid.
Be careful not to damage the grille which consists of aluminum slats which deform easily.

Troubleshoot fluorescent tube lighting

To remove the neon tube, turn it about a half turn.

Rotate the tube

2. To replace the fluorescent tube, gently rotate it until the pins on each socket are released from their socket. When the tube is blackened at its ends, it must be changed.

Rotate the tube half a turn, pull it out of the socket and pull it forward.

Drop the tube

3. Remove the lugs from the socket on one side and pull the tube lengthwise. Remove the tube.

Replace the tube with a new one in the opposite procedure of removal.

Replace the tube

4. Replace the fluorescent tube with a new one of the same power and same light temperature as the second tube of the lighting.

It is best to replace the tube and its choke at the same time.

Remove the starter

5. Rotate the choke a quarter of a turn and remove it.

Engage the studs of the new choke in the slots of the socket and turn a quarter of a turn.

Replace the strater

6. Replace the choke with an identical model.

Replace the hooks and replace the protective grille.

Replace the protective grid

7. Refit the grille, being careful not to deform it. Replace the suspension hooks.

After having restored the power to the circuit concerned, test the correct operation of the lighting.

Test the lighting

8. Check that the tubes are no longer flashing and light up.

Replacement of the ballast (deposited lighting)

If the fault persists, it is that the ballast is involved. It must be replaced.

The fault persists despite the replacement of the tube and the starter

1. If the tubes still do not light up, the ballast must be changed.

Replace the defective balast with an identical model or the same characteristics.

Fit the new ballast

2. Remove lighting to work on workbench.
Dismantle the defective ballast, note very precisely the position of the various connections.
Arrange the new ballast on the tube support.
Attach the ballast to the Phillips screwdriver.

The ballast is to be connected to the two active supply conductors (phase and neutral) and the protective conductor (earth).

Connect the power supply leads

3. Comply with the power scheme marked on the ballast. Press the automatic connector with a flat screwdriver:

  • connect the earth conductor (E),
  • connect the phase conductor (L),
  • connect the neutral conductor (N).

All you have to do is connect the ballast distribution conductors.

Connect the distribution conductors

4. Respect the distribution diagram written on the ballast:

  • connect the two connectors of one of the sockets (1 and 2),
  • connect the other two connectors (3 and 4).

(photos / visuals: © DIY-Prod, except special mention)

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