Philips SPX 15-35 Lamp Replacement and Adjustment, Centering the lamp, Optimising the Output

SPX Operation Manual 5

Lamp Replacement and Adjustment

Isolate electrically before re-lamping the luminaire. Also be aware that the lamp and/or luminaire may still be hot, so exercise necessary caution to avoid burns.

To ensure optimum performance from your SPX luminaire, follow the steps below:

Centering the lamp

1Remove the lamp holder as described above.

2Level the lamp socket plate by adjusting the lamp alignment screws.

3Turn the peak/flat gear

4Carefully replace the lamp holder module and tighten the thumbscrew to lock it into position. Reconnect the luminaire to the power supply.

5Turn the peak/flat gear clockwise towards the peak

setting. This is indicated by the raised peak setting symbol on the peak/flat gear. 5 half turns will shift the lamp into the approximate centre position.

6	Centre the lamp in the beam if necessary by adjusting the lamp	Peak
	alignment screws.	symbol

Optimising the Output

The lamp position can be altered to 'peak' or 'Flat' light output.

The peak beam gives a central hot spot falling off evenly to the beam edges. This setting is useful for normal stage lighting purposes where beams are overlapped to achieve an even cover.

Flat adjustment provides a visually even light beam suitable for gobo projection. Take care to move the lamp carefully as the lamp filament is burning white hot and at its most vulnerable.

Don't over-tighten the knobs; finger tight pressure is all that is required.

1Adjust the beam to its narrow angle, with a sharp edge.

2Peak the output (turn the centre gear clockwise towards the peak symbol) until you see light flare around the edge of the beam.

3Turn the centre gear anti-clockwise towards the flat symbol until the flare is removed and you have a clean sharp-edged beam. This is the position of maximum light output.

4A useful technique to check how well the lamp is centred is to push two of the shutters into the beam, and then check if any reflection off the shutters is visible in the beam. If so, adjust the screw on the side opposite to the reflection until it disappears.

5To set a „FLAT‟ beam, turn the centre gear anti-clockwise towards the flat symbol until the distribution appears even across the beam.

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