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5.

Loosen the retaining ring fastening screws approximately 1/2-turn.  The retaining

ring can then be turned counterclockwise approximately 1/2-turn.  The retaining ring can then be
lifted free of the unit.  The interior lens can now be removed from the unit.

6.

Grasp the flash tube by its base and pull it out of the socket, using a gentle

“rocking” motion.  Install new flash tube, ensuring that the flash tube is fully seated in the socket.

7.

Reinstall interior lens.

8.

Before replacing the dome, ensure that the gasket is properly seated and shows no

signs of cracking or other deterioration.  Replace the gasket if it is damaged or shows signs of
deterioration.

9.

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 (19mm)].

10.

Replace the screw into the bottom of the dome.

11.

Test the light for proper operation.

B.

Circuit Board Replacement.

High voltages are present inside the light assembly.  Wait at least 5 minutes after
shutting off the power before servicing unit.

1.

Disconnect power.

2.

Remove the setscrew located at the bottom of the dome.

3.

Grasp the top of the dome and push down while turning the dome counterclockwise

approximately 3/4-inch (19mm).

4.

Gently lift dome away.  Ensure that the gasket between the dome and base is not

lost.

5.

Loosen the retaining ring fastening screws approximately _ turn.  The retaining

ring can then be turned counterclockwise approximately _ inch (13mm), allowing the retaining to be
lifted free of the unit.  The interior lens can now be removed from the unit.

6.

Remove and retain the screws and heat sink clip, which secures the power supply

circuit board to its mounting plate.  Remove the power connector(s) from the P.C.B.  Since some
strobes are polarity sensitive, connect matching colored wires together.

7.

Secure the new circuit board to the mounting plate with the previously removed

screws and reattach heat sink clip.

8.

Install flash tube as described in Section III.A.  (Flash Tube Replacement).  Ensure

that the flash tube is fully seated in the socket.

9.

Reinstall interior lens.

10.

Before replacing the dome, ensure that the gasket is property seated and shows no

signs of cracking or other deterioration.  Replace the gasket if it is damaged or shows signs of
deterioration.  Replace the gasket if it is damaged or shows signs of deterioration.

11.

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 (19mm)].

Summary of Contents for 224XSTHI

Page 1: ...EL 224XSTHI VISUAL SIGNAL APPLIANCES FOR THE HEARING IMPAIRED FOR USE IN HAZARDOUS LOCATIONS Address all communications and shipments to FEDERAL SIGNAL CORPORATION Electrical Products Division Service...

Page 2: ...threaded joints are properly tightened Keep unit tightly closed when in operation After testing is complete provide a copy of this instruction sheet to all operating personnel Establish a procedure t...

Page 3: ...are 16 33Vdc This product was only tested to its rated operating voltage range It was not tested to 80 and 110 of these limits The DC units are polarity sensitive and MAY BE DAMAGED by incorrect elec...

Page 4: ...sed the flash tubes begin to darken causing the light output to decrease This darkening is characteristic of flash tubes The darkening will begin near the base of the tube and progress upward In addit...

Page 5: ...and push down while turning the dome counterclockwise approximately 3 4 inch 19mm 4 Gently lift dome away Ensure that the gasket between the dome and base is not lost 5 Loosen the retaining ring faste...

Page 6: ...y problems that cannot be handled locally by Federal Signal s Distributor or Manufacturer Represen tative If any unit returned to Federal Signal for service inspection or repair must be accompanied by...

Page 7: ...5 40 6 90 45 4 05 50 4 05 55 3 30 60 2 70 65 2 40 70 2 25 75 1 95 80 1 80 85 1 80 90 1 80 ON AXIS VERTICAL 0 15 30 45 60 75 90 ON AXIS HORIZONTAL 0 15 30 45 290A4167 60 75 75 90 90 60 45 30 15 Horizon...

Page 8: ...2561694D REV D Printed 9 04 Printed in U S A 2 A New flash tube B Used flash tube tends to discolor in areas shown and should be replaced 290A4168 A B...

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