Welch Allyn 49506 Light Source - User Manual - Manual (Page 14)

1-10
TROUBLESHOOTING
If lamp is not
illuminating and...
POSSIBLE CAUSE SOLUTION
fan is not
operating. Light Source is not
plugged into either the
wall outlet or the power
cord socket. Plug the power cord into the wall
outlet and power cord socket at
back of unit.
Power switch is not
turned on. Depress the “I” side of the power
switch.
The bottom cover is not
properly installed. Remove the bottom cover and
reinstall carefully, making sure
that the lip on the bottom fits into
the front of the housing and that
the thumbscrew is fully tightened.
One or both fuses have
blown. Replace both fuses. Follow the
instructions in the fuse
replacement section. If fuses
continue to blow, return Light
Source to an authorized repair
center.
Power cord is damaged.
This may cause
intermittent operation. Replace the power cord with a
new Welch Allyn power cord.
No power is supplied to
the wall outlet. Verify that the wall outlet has
power by checking the circuit
breaker status and by operating
other equipment at that wall
outlet.
fan is operating. The lamp was not able to
“cool down” before
restarting. Wait at least 15 seconds after
turning the Light Source off before
turning it back on.
The Light Source has
overheated. Verify that all ventilation slots and
the fan area are not obstructed.
The Light Source should be
mounted on the supplied
mounting bracket and there
should always be at least 3-inches
clearance.
The lamp has burned out. Replace with a new Welch Allyn
lamp. Refer to the lamp
replacement section.