SO-111-R/RF Ophthalmic Microscope
User Manual
Page 20 of 22
Issue number 1.0 X:\Current User Manuals\SO-111-R-RF User Manual v1.0.doc
TROUBLESHOOTING
SYMPTOM
CAUSE
REMEDY
No lamp/failed lamp
Replace lamp
Mains power failure
Use battery back-up
Check and replace fuse if
necessary
No light
Fuse blown
Check mains voltage setting
110/220V
Incorrect voltage setting
Check mains voltage setting
110/220V
Fuse repeatedly blows
Mains power fault
Check mains wiring, do not
use microscope if wired
incorrectly. Use battery
backup
Intensity turned down
Increase intensity
Aged lamp
Replace lamp
Dirty optics
Clean eyepieces, prism and
objective lens
Battery power low
Recharge/replace battery
Incorrect lamp
Replace with lamp of correct
specification
Low light level
Lamphouse off-centre
Re-centre lamphouse on
image centre (use adjusting
grubscrews)
Microscope falls under own
weight
Insufficient focus friction
Increase focus friction
Connect foot control to
underside of power supply
No connection
Open focus cover and check
the connection inside the hole
in the black plastic block
Too much friction
Reduce focus friction
Foot controlled focus does
not function
Speed control too low
Increase focus speed
Blurred vision
Dirty optics
Clean eyepieces, prism and
objective lens
Mouldy optics
Carefully clean mould from
optical elements and replace
mould protection pellet
Refractive error
Focus right eye first through
RHS eyepiece then adjust
LHS eyepiece to compensate
for error
Microscope unsteady
Unstable surface
Stiffen mounting surface with
a plate
Knobs loose
Tighten adjustment knobs as
necessary