OCULUS SDI 4 Instruction Manual page 20

11 Troubleshooting
Fault
No function when the hand
switch / foot switch is pressed
(hand-held pushbutton for SDI® 4c
only optional)
The image is cropped
Unclear image
The SDI® 4 or its fixtures wobble
Fundus view is too narrow
Pronounced reflections on BIOM®-
loupe or contact lens
16 / 24
Fault list - SDI® 4
Possible cause
The hand switch / foot switch

is not connected to the
SDI® 4e/c
 no connection of the SDI® 4e/
c to the power supply
Power failure or power socket

is not active
These are not active if the

sockets of the stand are being
used.
The SDI® 4 or other

components are incorrectly
mounted at an angle
The optics of the SDI® 4 are

not in operating position
(locking position)
 The SDI® 4 or the optic of the
are dirty
BIOM® 5
 The locking screws are loose
Distance between

ophthalmoscopic lens and eye
too large
(only when using
BIOM® 5)
 Magnification of the
microscope system to high
 The microscope light is on
Bright ceiling illumination

Instruction Manual SDI® 4 (G/54320/EN 0220 Rev01)
Remedy
Establish the connection to

the SDI® 4e/c
 Establish the connection to
the power supply
Inform the in-house

electrician
Use the plug transformer

Switch the SDI® 4

mechanically
Activate the sockets in

accordance with the
instructions for the stand
Ask the microscope

manufacturer for assistance
Correct the assembly

Turn it on or off again with

the switch
 Clean the glass surface of the
BIOM® 5 loupe
If the SDI® 4 optics are dirty,

contact OCULUS Service or
your authorized dealer.
 Tighten the locking screws
Carefully reduce the distance

using the microscope fine
adjustment mechanism
 Reduce magnification of the
microscope
 Turn the light off, illuminate
only intraocular