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3.
Lighthead maintenance
Two lightheads, the 10W P417 and the 40W P418 are used with the P415 rotational color flexiprobe
camera. The lamps used are quartz halogen units with their leads pre-trimmed to fit the lighthead
sockets.
WARNINGS:
1.
Risk of explosion. Use ONLY lamps supplied by Pearpoint. Using lamps from other sources will
invalidate the certification rendering the equipment unsafe to use in a hazardous environment.
2.
Risk of burn injury. Do not touch lightheads when they are switched on. They are hot and you may
receive a burn. Always allow adequate time for the lighthead to cool before handling
CAUTIONS: Do not touch replacement bulbs with bare fingers or greasy gloves. Always use a clean, lint-
free cloth to remove from the transit box and fit into the lighthead.
Ensure the lighthead glasses are clean and free from grease and dirt. Excessive grease can cause
overheating and premature failure of the glass.
NOTE: Lamps in all of the lightheads are wired in series. If one lamp has failed the other will be nearing
the end of its useful life. We therefore recommend that you change both at the same time to avoid
subsequent early failure.
4.3.1 P417 Lighthead lamp change
NOTE: Lamps in all of the lightheads are wired in series. If one lamp has failed the other will be nearing
the end of its useful life. We therefore recommend that you change both at the same time to avoid
subsequent early failure.
Do not remove the four M4x8 socket head cap screws (1) from the lighthead fascia - this is done to
change the brushes, only.
Remove the center sleeve by unscrewing the large stainless steel ring at the front.
1.
2.
Remove the four M2.5x5 socket head cap screws (2) from the face of the PCB.
Re-attach the center sleeve and pull firmly, squarely and gently, to extract the lamp/PCB assembly
3.
(6) from the front housing (7).
Slide both reflectors (3) away from the bulbs.
4.
CAUTION: Keep the lighthead upright with the lamps at the top to prevent the reflectors falling away as
the assembly is extracted.
Loosen the M2 x 3 countersunk grub screw (4) holding lamp lead (1 per lead).
5.
6.
Pull out the lamps and discard. Replace with Part No. 26/X04GE882. Tighten the grub screws.
Check that the leads on the lamps are not touching any of the surrounding metalwork.
CAUTIONS: Do not touch replacement bulbs with bare fingers or greasy gloves. Always use a clean, lint-
free cloth to remove from the transit box and fit into the lighthead. Ensure the lighthead glasses are clean
and free from grease and dirt. Excessive grease can cause overheating and premature failure of the
glass.
Discard 'O' ring 07/B01BS034 (8). Clean the groove. Replace with new 'O ring. Apply a thin film of
7.
silicone grease to the 'O' ring before fitting.
Replace the reflectors and re-assemble the lighthead.
8.
NOTE: The pogo sockets are not mounted symmetrically. The inside rear of the front brush holder has
holes drilled to accommodate the rear of the pogo socket. From inspection you will be able to see that
the lamp/PCB assembly will only go back into the front brush holder one way. If you try and push it in the
wrong way you will damage the PCB.
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