GLP GT-1 Instruction Manual page 26

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To install a new lamp:
Connect the lamp wires to the lamp's spade terminals.
Position the lamp in the housing with the wires leading towards the top of
the head (1) and tighten the retaining clips.
Fasten the lamp housing assembly to the head (2).
Lead the lamp wires through the lamp housing assembly and connect to
the ballast (3).
Hook the ballast cover onto the stand-off spacers (4).
Note the different fan wire connectors when reinstalling the fan assemblies:
the top fan has the white connector (5). Lead the top fan wires under the
larger wire bundle as shown to prevent it from being pinched (6).
Install the top and bottom head covers.
Reset the lamp hours counter from the display panel.
Before installing the rear head cover, you may want to check lamp
alignment and adjust if necessary as described below.
Lamp Adjustment
The position of the lamp can be adjusted to center the hotspot. Warning! The
adjustment procedure requires unshielded exposure to the lamp and may result in
serious injury. Use extreme caution, wear protective equipment, and avoid looking
directly at the light output. Apply a strong color filter while performing the adjustment.
There are five adjustment slots in the lamp holder (1). Move the lamp holder up,
down, left, or right by twisting a slotted screwdriver inserted in a slot as shown in panel
2 (fan removed for clarity). The top-left slot can be used to move the holder to the
left (using inside position) or right (using the outside position).
Perform the adjustment with the fans and head shells installed (3).
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Figure 7-7: Lamp installation
Instruction Manual