19
TROUBLESHOOTING TABLE
Problem
No illumination
Insufficient illumination
Inoperative surgical
field illumination
30
Possible Cause
Power cable not plugged in
Power switch in OFF position
Defective instrument fuse
Defective power cable
Line power failure
Failure of suspension system
electronics
Light guide not properly
inserted in arm or microscope
Brightness level set too low
Light guide not properly
inserted in arm of
microscope
Defective light guide
(illumination not uniform)
Inoperative surgical field
illumination
Failure of electronics
Switch off via microswitch on
suspension system
Prima ENT/DNT
Remedy
Plug in power cable
Press the power switch to
ON position
Change the fuse
Change the power cable
Contact in-house technician
Contact the service
department
Insert the light guide
properly to get maximum
illumination
Adjust the brightness
control knob
Insert the light guide
properly to get maximum
illumination
Change the light guide
Insert the light guide as far
as it will go
Illuminate the surgical
field using an alternate
illuminator, and contact the
service department
Move the suspension arm of
the suspension system into
the working position
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