LS-450 Series Blue LED Pulsed Light Sources
LS-450 Series Blue LED Pulsed Light Sources
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Changing a Bulb in the R-LS-450
To change the bulb in the R-LS-450, follow the steps below:
1. Ensure that the unit is off and that power is disconnected from the R-LS-450.
2. Use the 1/20 Allen wrench to loosen the small setscrew located on the side of the blue optical housing. If
you remove the screw fully, place it in a safe place until you replace it later in this procedure.
The LED and barrel are housed within the blue optical housing. This housing also contains the SMA fiber
connection. There are two thin black wires connected to a socket, which is in turn plugged in to the rear
end of the LED barrel.
3. Slide the LED barrel out of the blue optical housing. The barrel should slide easily. If it does not, you will
need to further loosen the setscrew (Step 2) and retry.
4. Remove the blue filter, seated directly in front of the blue LED. Place the filter to the side. You will only
need this filter when using the blue LED.
5. Unplug the blue LED from the connection socket. Remove the socket by gently pulling the insulated black
wire back from the rear of the barrel. The socket should unplug easily
Note: If you want to reinsert the default blue LED in the future, identify the original LED orientation with
a small amount of liquid paper.
6. Seat the socket of the replacement LED firmly into the rear of the barrel (where the anode and cathode
lead pins are located). The orientation of the LED should be marked with a white dot on the side of the
barrel (cathode side) OR by differing pin lengths (the short pin is the cathode side of the LED).
There is also a diagram of the LED on the circuit board of the R-LS-450, which illustrates the socket
orientation relative to the LED. This diagram is located next to where the two black wires connect to the
circuit board.
7. Return the LED barrel back into the blue optical housing of the R-LS-450.
8. Push the barrel all the way into the blue optical housing and tighten the setscrew on the side (loosened in
Step 2) so that the barrel is firmly set in the housing.
9. Plug the unit into the 12 V power supply and turn the unit on. If the LED illuminates, installation was
successful. Return the R-LS-450 to the original rack unit.
If the new LED does not illuminate when the switch is in the On position, consult the troubleshooting tips
at the end of this section.
Troubleshooting
If the replacement LED does not illuminate when the switch is in the On position, check the following items:
•
Is the power supply in use correct? The light sources require a 12 V power supply with a 2.1mm center-
positive jack.
•
Is the power supply plugged into an outlet that is enabled and standard for the power supply you are
using?
•
Is the LED in the correct orientation in respect to the socket (Anode and Cathode)?
If these items are correct and the light source is not emitting light at the proper wavelength (or at all), please
contact Ocean Optics Technical Support at
or at (727) 733-2447.
