Troublshooting Section 3
Service Manual 488061 Rev. B Welch Allyn Exam Light III 1
Initial Screening
1. Inspect the Exam Light for physical damage - cracked cover, etc.
2. Attempt to confirm reason for return.
3. If reason can not be determined, contact the sender.
Light Pipe
1. Flex the light pipe at each bend and replace any that:
A. Have noisy monocoils.
B. Show signs of not holding position.
C. Have excessive springback when positioned in a “U” position.
NOTE: When the light pipe is placed in the “U” shape, at the center bend, the pipe
should not spring back by more than 8 to 9 inches. When the light pipe is bent in a “U”
shape at the light source bend, the spring back should not be more than 4 to 5 inches.
Focusing Sleeve
1. Check for cracks or damage.
2. Check for smooth operation of the lens when the sleeve is turned.
3. Replace any lens that have scratches.
Electrical Troubleshooting
WARNING: Turn off and unplug unit between each of the next steps.
1. Lamp does not light and the green rocker switch does not light.
A. Pull fuses out and check fuses with ohm meter.
B. Attach a known good power cord.
C. Replace the green rocker switch.
D. Check the AC connector for damage and cracks.
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