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After extended operation, occasionally check for flash tube degradation. Should the flash tube
misfire, have a noticeable decrease in light output, glow continuously or darken to a point
beyond that shown in figure 1—it should be replaced.
High voltages are present inside the light assembly. Wait at least 5 minutes after shutting off the
power before servicing this unit.
To replace the flash tube, proceed as follows:
1. Disconnect power.
2. Remove the screw located at the bottom of the dome
3. Grasp the top of the dome and push down while turning the dome counter-clockwise
approximately 3/4-inch.
4. Gently lift the dome away. Ensure the gasket between the dome and base is not lost.
5. Grasp the flash tube by its base and pull it out of the socket, using a gentle "rocking"
motion. Insert the new flash tube.
6. Before replacing dome, ensure that the gasket is properly seated on the housing base.
Place the dome over the base, aligning the recesses inside the dome lip with the four pins
on the base. Push down on the dome and turn clockwise until it locks in place (approxi-
mately 3/4-inch)
7. Replace the screw in the bottom of the dome.
8. Test the light for proper operation.
B. PC Board Replacement.
High voltages are present inside the light assembly. Wait at least 5 minutes after shutting off the
power before servicing this unit.
1. Disconnect the power.
2. Remove the remove the screw located at the bottom of the dome
3. Grasp the top of the dome and push down while turning the dome counter-clockwise
approximately 3/4-inch.
4. Gently lift the dome away. Ensure that the gasket between the dome and base is not lost.
5. Remove the flash tube as described in paragraph II.A.5. Flash Tube Replacement.
6. Remove the power connector(s) from the P.C. board. When replacing older board assemblies,
the power connectors need to be adjusted to match the new assemblies. Included with the
replacement board is a power lead adaptor. Since some strobes are polarity sensitive,
connect matching colored wires together.
7. Remove the 6-32 screws, which secure the circuit board to housing base. On older DC units,
the #4 phillips head screw securing the power transistor must also be removed. Remove the
old circuit board. Place the new circuit board in position. Secure the circuit board in
position by installing two 6-32 screws at opposite corners of the circuit board.
8. Install the flash tube as described in paragraph II.A.5. Flash Tube Replacement.
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