DHA gecko Instructions for use

LIGHTING LIMITED
Gecko Image Projector
Instruction & Maintenance
Manual

1 Connecting the Gecko 2
2 Gobos 4
3 Focusing the Gecko 6
4 Optional Gecko Accessories 8
5 Maintenance 12
6 Appendices 14
Contents

The Gecko is supplied with a 0.5m 3-core mains ca le with no plug fitted.
The Gecko is availa le in a 230V European model and a 115V US model. It is
very important to check that you are using the correct model for your coun-
try to avoid the risk of damage to the unit. The unit must e connected to a
fused mains supply with a fuse rating no greater than 5A, and must e
earthed.
The Gecko is supplied with a universal mounting racket as shown (Fig 1).
The racket can e adjusted to allow for ceiling mounting, wall mounting or
floor / shelf mounting y loosening the "T" nut at the side of the unit and
rotating the arm around to the desired position as illustrated.
The hole in the racket is a 12mm hole which allows for direct mounting
onto a large range of track adapters, ceiling mounts, wall rackets and
stands.
Please contact DHA for details a out suita le mounting accessories.
Connecting The Gecko
2
1
Fig 1
Tighten
Loosen

Additionally, the alance of the Gecko can e altered to compensate for any
accessories that may e used. To do this loosen the two nuts securing the
mounting racket to the ase of the unit and slide the racket towards the
front or the rear of the unit and then re-tighten the nuts. Be careful not to
over-tighten the nuts on the ase (Fig 2).
When choosing a mounting position for the Gecko, e sure that there is at
least 15cm clearance ehind the unit so as not to o struct the fan.
There should e at least 0.5m etween the front of the Gecko and any
o jects or walls. The mounting surface should e flat and free of moisture.
TThhee GGeecckkoo iiss ddeessiiggnneedd ffoorr iinnddoooorr uussee oonnllyy..
3
Tighten
Loosen
Fig 2

A go o is an etched disc of metal or coated glass which allows an image to
e projected from the Gecko onto a wall or similar surface.
Go os ecome very hot when they have een in a lantern for an extended
period of time, so it is important never to handle go os until they have had
sufficient time to cool.
IInnsseerrttiinngg aa MMeettaall GGoooo
The go o holder on the Gecko is designed to take metal go os on one side
and glass go os on the other. Please refer to the drawings (Figs 3 + 4) to
see which side is used for inserting the metal and glass go os taking spe-
cial note of retaining ta s on each holder.
Take the go o in one hand and rotate it so that when looking from the front
of the gecko, the go o is upside down and ack to front (Fig 3). This is
ecause the projector will invert the image when it is projected.
Lower the go o into the holder so that it is held on 3 sides y the ta s ent
outwards from the holder (it may e necessary to end these ta s slightly if
the go o will not fit snugly).
To remove the go o, gently slide the go o upwards and away from
the holder.
Gobos
4
2
CCaauuttiioonn
Allow go os to cool
efore removing
Slide out go o from
the retainer
Fig 3

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If you are using a glass go o in the Gecko then you will need to make sure
that it is mounted in a glass go o ezel (contact DHA for details).
The glass go o should e inserted on the opposite side to the metal go o,
please refer to the drawing (Fig 4) to see which side is used for inserting
the glass go os.
Take the go o in one hand y holding the ezel and ensuring that you do
not make contact with the surface of the glass itself. The ezel must e
positioned so that the flat rim is towards the go o holder.
Gently ease forward the two ta s sufficiently to allow the ezel to slide
comforta ly down into the holder, and then carefully release the ta s which
should now hold the ezel firmly in place.
To remove the go o, gently ease the two ta s forward and slide the ezel
upwards and out of the holder.
NB: A 3mm space should e left etween the glass go o and the spill ring
to minimise heat uild up of the unit.
5
Fig 4
CCaauuttiioonn
Allow go os to cool
efore removing
Slide ezel out of
the retainer
Ease ta s forward
to release ezel

Turn on the power and aim the unit towards the surface onto which the
image is to e projected.
FFooccuussiinngg aa SSttaannddaarrdd GGeecckkoo..
Once you have the unit positioned as required, loosen the thum screws on
either side of the go o holder and move the go o holder along the runners
until it is a few millimetres away from the front of the spill ring. Re–tighten
the thum screws to hold the go o holder in place.
Next loosen the thum screws on each side of the lens and then slowly
move the lens forwards or ackwards until the image ecomes clear and
crisp, then re–tighten the two thum screws to hold the lens in place (Fig 5).
Focusing the Gecko
6
3
Fig 5
Tighten
Loosen
Focus

FFooccuussiinngg aa ZZoooomm GGeecckkoo
The process for focusing a zoom Gecko is very similar to the method
descri ed opposite for the standard Gecko except that two lenses are
employed. The front lens is used to focus the image and the rear lens is
used to alter the size of the image. However, every time the size of the
image is altered, the image will go out of focus so the front lens will need
to e adjusted accordingly to restore the sharpness of the image.
Fig 6
Careful manipulation of the two lenses should provide you with a crisp,
clear image at the desired size (Fig 6).
+-
7
Loosen
Tighten
Tighten
Loosen
Focus
Size

The following optional accessories are availa le for the Gecko. Please con-
tact your retailer or DHA for details. Only use DHA approved accessories.
FFrraammiinngg SShhuutttteerrss
The framing shutters are usually used instead of a go o where the Gecko is
eing employed to highlight a particular o ject. Light can e contained to
frame an o ject without spilling onto the surrounding area (Fig 7). Shutters
can even e arranged to form a triangular aperture.
Fig 7
Accessories
8
4
CCaauuttiioonn
Framing shutters may
ecome hot if placed
close to the lamp
Rotate handles until
required framing angle
is o tained

CCoolloouurr HHoollddeerr
The colour holder allows the colour of the eam of light from the Gecko to
e changed to suit the surroundings y the use of a small piece of coloured
"gel" which is inserted into the holder (Fig 8).
9
Fig 8
Gel size
60mm x 65mm

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When the Gecko is used for projecting very intricate detail on an image, a
certain amount of "flare" will e seen which can make the image look
slightly soft, or fuzzy edged. This "flare" can e greatly reduced with the
use of the Anti Flare Aperture, which is mounted on the front of the Gecko
after all the other accessories are in place (Fig 9).
Fig 9
10
Tighten
Loosen

SSppiillll RRiinngg
The spill ring is a top-hat shaped ring that is mounted directly in front of
the lamp and stops any light from escaping from the side of the Gecko. This
is for use in areas where unwanted light spillage is not accepta le and is
supplied as a standard part of the Gecko.
11
Remove four screws
from front plate

Maintenance
5
Once installed correctly the Gecko should provide years of trou le free
operation. However as with all electrical appliances, regular maintenance
should e carried out to ensure that the quality of the light from the unit
remains constant.
1. Regularly clean the outside of the Gecko case with a dry, lint-free cloth
to remove any unwanted dust uild up. Make sure that the fan guard at
the rear of the Gecko is not o scured or locked in any way.
2. Regular cleaning of the lenses is essential as dust uild–up on the sur–
face of the lens can reduce light output y up to 75%. Cleaning the lens
should e done y first wiping the surface of the lens with a dry, lint-free
cloth and then y cleaning the lens with methylated spirit.
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RReeppllaacciinngg tthhee LLaammpp
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1. Loosen the thum screws on the lenses, the go o holder and any other
accessories that are fitted and slide them away from the lamp towards
the end of the runners.
2. Remove the four screws from the front plate of the Gecko. Remove the
front plate to allow access to the spill ring and lamp holder.
3. Slide out the lamp holder and lamp y gently easing them forwards out
of the Gecko.
4. Remove the lamp from its holder y sliding the lamp downward away
from the lamp holder plate.
5. Disconnect the lamp y pulling the lamp and the ceramic connector in
opposite directions as shown.
6. Taking a new lamp, push the ceramic connector onto the pins at
the ack.
12

7. Place new lamp into holder y sliding towards the lamp holder plate.
Replace into Gecko making sure that the lamp holder plate is inserted
into the uppermost grooves in the ody and is level (Fig 10).
8. Replace the front plate and tighten screws.
9. Return the accessories and lenses to their original positions and focus
the unit
13
Fig 10
Remove the four screws from
the front plate
Remove the spill ring
Slide out lamp holder & lamp
Remove lamp from holder
Separate lamp and
connector
Lamp holder PCB must slide
into the upper slots
CCaauuttiioonn
Allow the unit to cool efore
replacing the lamp

Technical Specification 15
Clearance Requirements 16-19
Declaration of Conformity 20
Appendices
14
6

echnical Specification
Model: Dimma le Gecko Image Projector
Operating Voltage: 230V ac (115V ac)*
Power Consumption: 50-75W max or 100W
Lamp Type: MR16 100W (max)
Replacement lamp: 75EZZ (for 230V version)
Phillips Masterline 50W 24 degree
(for 110V version)*
Go o Size: Size "E" 37.5mm diameter – metal
or glass
NB Glass go os should e mounted
in a ezel
Weight: 0.7Kg
Dimensions: 450mm x 55mm x 65mm
* denotes the US model
15

16
Clearance required with luminaire suspended from rackets in rear position.
50°
90°
R 365 mm

17
Clearance required with luminaire suspended from rackets in forward position.
R 240 mm
45°
50°
R 160mm

18
Clearance required with luminaire supported y rackets in rear position.
90°
45°

19
Clearance required with luminaire supported y rackets in forward position.
45° 50°