2 Welch Allyn Exam Light III Service Manual 488061 Rev. B
Section 3 Troubleshooting
2. Green rocker switch light is illuminated but the lamp does not light.
A. Check for proper lamp. It should be 12 volt 35 watt, Welch Allyn #04200.
NOTE: If the lamp is replaced, burn the unit in for at least one hour to confirm there are not
other issues.
B. Check transformer output. It should measure 12vac.
C. Lift lamp out of bracket and check filter and gasket.
NOTE: The gasket should not be blocking the light. The filter should not be cracked,
chipped or dirty.
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