CL100 / CL300 Service Manual - Welch Allyn

If the DMM reading does not match, replace and retest the LED harness.
If DMM reading matches above, replace and retest the auxiliary board.
TEST #5: MICRO LINK® FIBER TEST
The purpose of this test is to verify the operation of the Micro Link® Fiber.
With the illuminator on, connect the fiber and the headlight. Over a distance of at least five feet, adjust the spot
diameter to the largest size.
If the intensity of light is not consistent throughout the light spot and rotating the distal end connector does
not cause the shape to change, the headlight is the most likely cause of the fault.
If the intensity is not consistent with alternating light and dark rings are present, the broken fiber is broken at
the distal end.
Over the same distance, adjust the headlight to the smallest diameter spot. At this adjustment, the headlight is
focused. If any spot irregularities are present, hold the headlight steady while rotating the distal end (black)
connector.
If the location of the defects move, remove the fiber, clean the end with distilled water, reconnect the unit, and
test. Replace the fiber if defects are still present.
If the location of the defects remain stationary, the fault is within the headlight.
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