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Troubleshoot a halogen lamp post

The halogen lamps on stem and base have a dimmer that is operated with the foot. The malfunction of these luminaires generally has only two causes: the bulb is burnt out or / and the fuse of the inverter has jumped (often when the bulb itself has burned). Their replacement requires especially meticulousness. If other components of the drive are involved, it is better to replace it because of its low cost.

Necessary material

  • Electrician's screwdriver and Phillips screwdriver
  • Brush
  • Dry cloth and dusting gas bomb

Troubleshooting the dimming control box

Attention: you must first unplug the luminaire!

Unplug the lamp

1. Start by unplugging the lamp post. We can forget to do it since the bulb is no longer lit.

Troubleshoot a halogen lamp post

The cover of the control box is held by Phillips screws which must be undone.

Undo the screws of the control box

2. Undo the three screws on the back of the control box. Use a Phillips screwdriver. Store the screws so you do not lose them.

Once the control box is open, you can locate the fuse.

Locate the fuse location

3. Open the control box. Locate the fuse location.

It is necessary to lever with the blade of a small electrician's screwdriver to extract the fuse that is blown.

Remove the fuse

4. Using an electrician's screwdriver, pry under one of the fuse holder terminals to remove the fuse easily.

It is good to buy a wafer of ten fuses to have in reserve.

Buy replacement fuses

5. Purchase a replacement fuse (typically 5 x 20 mm, 1.5 to 5 A depending on the size of the bulb). The amperage of the fuse is in principle engraved on one of its two bases.

Replace the new fuse by rotating it to ensure contact.

Put the new fuse

6. Insert the new fuse by snapping it into the fuse holder. Rotate it to ensure good contact.

A dust bomb can clean the drive before closing it.

Dust the drive

7. Use it to dust off the bomb control box, then complete the operation with a brush.

Accumulated dust sometimes hinders the movement of the drive pin.

Test the displacement of the ergot

8. Test the lug of the drive, it must move freely in its rail. If necessary, give a cleaning spray to the rail.

False contact may result from loosening of the drive terminals.

Reseal the terminals of the drive

9. Take the opportunity to tighten the power terminals to the electrician's screwdriver.

To prevent any risk of pulling out the cables, tighten the locking screw of the cable clamp.

Tighten the cable clamp

10. Over time, the cable clamp blocking the two wires of the drive may loosen. Tighten its fixing screw to the Phillips screwdriver.

Close the housing and replace the screws. Do not overtighten them to avoid splitting the plastic of the case.

Close the case

11. Close the control box. Tighten the three screws with the Phillips screwdriver.

The drive shoe must slide without friction.

Check the drive

12. Check that the drive pad is moving properly.

Make sure that the power cable of the luminaire is blocked by its cable clamp.

Tighten the cable clamp of the luminaire

13. Also tighten the strain relief at the base of the lamp post.

The LED indicates that the luminaire is powered. It allows to locate the drive in the dark.

Check the power supply of the luminaire

14. Turn on the lamp post again. The lit diode confirms that the lamp is powered.

Reconnect the luminaire and test the operation of the inverter.

Test the lamp

15. Test the correct operation of the lamp by acting on the dimmer by hand before placing it on the floor.

Replacement of a grilled halogen bulb

As dust is accumulated in the luminaire cup, wipe it off with a dry cloth.

Dust the cup of the lamppost

1. Start by dusting the lamp post cup with a dry cloth.

Halogen bulbs are protected by different systems that must be dismantled.

Unscrew the blocking plate

2. Unscrew the protection plate locking plate with a Phillips screwdriver.

Remove the protective glass and store it to avoid breaking it.

Remove the protective glass

3. The bulb is protected here by a curved glass. Drop it.

It is necessary to push the bulb towards one of its elastic terminals to be able to extract it.

Remove the bulb

4. Push the bulb towards one of its elastic terminals and remove it.

Cleaning the baffle increases the brightness of the luminaire.

Dust the deflector

5. Take advantage of disassembling the bulb to dust off the inside of the aluminum baffle of the luminaire.

Grab the bulb with a tissue so you do not leave a fingerprick that could burn it.

Fit the new bulb

6. Grasp the new bulb with a tissue so you do not leave grease on it. Put the bulb in place with one side towards the elastic terminal.

Before reassembling the protective glass, test the bulb.

Test the lamp

7. Test the new bulb by acting on the dimmer, after reconnecting the lamppost.

Take advantage of its disassembly to clean the protective glass of the bulb.

Dust the window

8. Dust off the protective glass before reassembling it.

Replace the protective glass of the halogen bulb.

Position the protective glass

9. Position the protective glass over the bulb. Align the locking plate with the protective glass.

Do not forget to tighten the locking screw of the glass cover plate holder.

Screw in the locking plate

10. Screw in the locking plate. Tighten the screw of the plate in moderation.

It is now possible to test the drive with the foot.

Test the lamp

11. Now test the correct operation of the dimmer on the floor lamp.

On the same topic

  • Questions answers
    • Problem with low voltage halogen lamps
  • DIY tips
    • Light bulbs: selection and choice of lighting equipment

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Video Instruction: Changing A Halogen Lamp