Labomed eVO 350 User manual

Part No: 8126300-795
Issue 1.2
Printed on June,2020
eVO 350
Slit Lamp
User Manual

8126300-795
2
eVO 350 Issue 1.2
Printed on June,2020
eVO 350
eVO 350 is a registered Trade Mark of Labotech Microscopes India Pvt. Ltd.
Labomed is the registered Trade Mark of Labo America Inc.
All other trade marks are property of their respective owners.
The information contained in this document was accurate at the time of publication. Specification subject to change
without notice.
Labotech and Labo America Inc. reserves the right to make change in the product described in this manual without notice
and without incorporating those changes in any products already sold.
ISO 9001/13485 Certified - LABOMED products are designed and manufactured under quality management system
Conforming to ISO 9001/13485 requirements.
No parts of this publication may be reproduced, stored in the retrieval system, or transmitted in any form or by any means,
electronic, mechanical, recording, or otherwise without the prior written permission of LABOTECH.
Caution: Federal law restrict this devices to sale by or on the order of a licensed physician. Rx only.

3
Warnings and Cautions
Symbol Information
Introduction
Indications for Use
Contraindications
Setup
Parts Identification
eVO 350 Package Contents
Accessories
Unpacking & Installation
Application of Input Power
Disconnection of Input Power
Instructions for Use
Operation
Slit Length
Filter Dial
Slit Rotation
Cleaning, Disinfection & Maintenance
External Cleaning
Forehead / Chin rest Preparation
Cleaning the Glide Plate
Cleaning and Disinfection
Changing the Halogen Bulb
Changing the LED
Fuse Replacement
Replacement of Chin Rest Light Indicator
Troubleshooting
Chart of Common Errors
Specifications
Disposal
Software Revision
Guidance Tables
Warranty
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eVO 350
TABLE OF CONTENTS
8126300-795 eVO 350 Issue 1.2
Printed on June,2020

4
eVO 350
WARNINGS AND CAUTIONS
8126300-795 eVO 350 Issue 1.2
Printed on June,2020
LABOMED is not responsible for the safety and reliability of this instrument when:
- Assembly, disassembly, repair, or modification is made by unauthorized dealers or persons.
- The instrument is not used in accordance with this user manual.
A WARNING is an instruction that draws attention to the risk of injury or death.
WARNING: UNITED STATES FEDERAL LAW AND EUROPEAN REGULATIONS REQUIRE THAT THIS
DEVICE BE PURCHASED ONLY BY A PHYSICIAN OR A PERSON ACTING ON BEHALF OF A PHYSICIAN.
WARNING: THIS INSTRUMENT SHOULD BE USED IN STRICT ACCORDANCE WITH THE INSTRUCTIONS
OUTLINES IN THIS USER’S GUIDE. THE SAFETY OF THE OPERATOR AND THE PERFORMANCE OF
THE INSTRUMENT CANNOT BE GUARANTEED IF USED IN A MANNER NOT SPECIFIED BY LABOMED
TECHNOLOGIES.
WARNING: DO NOT REPAIR OR SERVICE THIS INSTRUMENT WITHOUT AUTHORIZATION FROM
THE MANUFACTURER. ANY REPAIR OR SERVICE TO THIS INSTRUMENT MUST BE PERFORMED
BY EXPERIENCED PERSONAL OR DEALERS WHO ARE TRAINED BY LABOMED OR SERIOUS
INJURY TO THE OPERATOR OR PATIENT MAY OCCUR.
WARNING: MODIFICATIONS TO THIS INSTRUMENT ARE NOT ALLOWED. ANY MODIFICATION TO THIS
UNIT BE AUTHORIZED BY LABOMED OR SERIOUS INJURY TO THE OPERATOR OR PATIENT
MAY OCCUR.
WARNING: IF THIS INSTRUMENT IS MODIFIED, APPROPRIATE INSPECTION AND TESTING MUST BE
CONDUCTED TO ENSURE CONTINUED SAFE USE OF THIS INSTRUMENT.
WARNING: TO AVOID RISK OF ELECTRIC SHOCK, THIS EQUIPMENT MUST ONLY BE CONNECTED
TO A SUPPLY MAIN WITH PROTECTIVE EARTH OR DAMAGE TO THIS INSTRUMENT AND/OR INJURY
TO THE OPERATOR OR PATIENT MAY OCCUR.
WARNING: ENSURE THAT THE VOLTAGE APPLIED TO THE UNIT IS THE SAME AS THE VOLTAGE THAT
IS INDICATED ON THE DATA PLATE OR DAMAGE TO THE UNIT MAY OCCUR.
WARNING: THIS INSTRUMENT MUST BE PLUGGED INTO AN OUTLET WITH AN EARTH GROUND. DO
NOT REMOVE OR DEFEAT THE EARTH GROUND CONNECTION ON POWER INPUT CONNECTOR OR
THE UNIT’S POWER CORD OF THIS INSTRUMENT OR DAMAGE TO IT AND/OR INJURY TO THE
OPERATOR OR PATIENT MAY OCCUR.
WARNING: THE EQUIPMENT OR SYSTEM SHOULD NOT BE USED ADJACENT TO OR STACKED WITH
OTHER EQUIPMENT AND THAT IF ADJACENT OR STACKED USE IS NECESSARY, THE EQUIPMENT OR
SYSTEM SHOULD BE OBSERVED TO VERIFY NORMAL OPERATION IN THE CONFIGURATION IN
WHICH IT WILL BE USED.
WARNING: THIS INSTRUMENT IS NOT SUITABLE FOR USE IN THE PRESENCE OF FLAMMABLE
ANESTHETIC MIXTURES, SUCH AS OXYGEN OR NITROUS OXIDE.
WARNING: BECAUSE PROLONGED INTENSE LIGHT EXPOSURE CAN DAMAGE THE RETINA, THE USE
OF THE DEVICE FOR OCULARE EXAMINATION SHOULD NOT BE UNNECESSARILY PROLONGED, AND
THE BRIGHTNESS SETTING SHOULD NOT EXCEED WHAT IS NEEDED TO PROVIDE CLEAR VISUALIZATION
OF THE TARGET STRUCTURES. THIS DEVICE PROVIDED WITH FILTERS THAT ELIMINATE UV RADIATION
<400NM) AND, WHENEVER POSSIBLE, FILTERS SHORT- WAVELENGTH BLUE LIGHT <420NM).
WARNING: THE USE OF ACCESSORIES OR CABLES OTHER THAN THOSE SPECIFIED, WITH THE
EXCEPTION OF THOSE SOLD BY THE MANUFACTURER AS REPLACEMENT PARTS FOR THE INTERNAL
COMPONENTS, MAY RESULT IN INCREASED EMISSIONS OR DECREASED IMMUNITY OF THE
EQUIPMENT OR SYSTEM.

5
eVO 350
WARNINGS AND CAUTIONS (continued)
8126300-795 eVO 350 Issue 1.2
Printed on June,2020
A CAUTION is an instruction that draws attention to the risk of damage to the product.
CAUTION: THE INTERNAL CIRCUITRY OF THE INSTRUMENT CONTAIN ELECTROSTATIC SENSITIVE
DEVICES (ESD) THAT MAY BE SENSITIVE TO STATIC CHARGES PRODUCED BY THE HUMAN
BODY. DO NOT REMOVE THE COVERS WITHOUT TAKING PROPER ESD PRECAUTIONS.
CAUTION: DO NOT USE SOLVENTS OR STRONG CLEANING SOLUTIONS ON ANY PART OF THIS
INSTRUMENT, AS DAMAGE TO THE UNIT MAY OCCUR SEE THE CARE AND MAINTENANCE
SECTION FOR DETAILED CLEANING INSTRUCTIONS.
CAUTION: MEDICAL ELECTRONIC EQUIPMENT NEEDS SPECIAL PRECAUTIONS WITH RESPECT TO
ELECTROMAGNETIC CHARGE (EMC) AND NEEDS TO BE INSTALLED AND SERVICED
ACCORDING TO THE EMC INFORMATION PROVIDED IN THE ACCOMPANYING DOCUMENTS.
CAUTION: PORTABLE AND MOBILE RF COMMUNICATIONS EQUIPMENT CAN AFFECT MEDICAL
ELECTRICAL EQUIPMENT.
CAUTION: THIS INSTRUMENT IS NOT TO BE USED NEAR HIGH-FREQUENCY EMITTING SURGICAL
EQUIPMENT.
CAUTION: THIS INSTRUMENT IS NOT INTENDED TO BE CONNECTED TO EQUIPMENT OUTSIDE THE
CONTROL OF LABOMED OR MUST BE TESTED TO AN APPLICABLE IEC OR ISO STANDARDS.
CAUTION: CHIN REST PAPER-FOR SINGLE USE ONLY. REPLACE WITH EACH PATIENT.

6
The following symbols appear on the instrument:
REF
S/N
eVO 350
EXPLANATION OF SYMBOLS
8126300-795 eVO 350 Issue 1.2
Printed on June,2020
Caution symbol indicating important operating and maintenance
instructions that are included in this User’s Guide.
Type B Applied Part
Alternating Current Power
Protective Earth
Connection ON/OFF
Manufacture
Catalog Number
Serial Number
Waste of Electrical and Electronic Equipment
Compliance to medical Device Directive 93/42/EEC
Accompanying Document must be consulted.
Authorized Representative in European Community.
Fragile Contents in Shipping Container- Handle with care
Keep Dry- Package shall be kept away from rain.
This way Up- Indicates correct upright position of package.
U.S. Federal law restricts this device to sale by or on the order of a physician.
LABOMED
Rx
Only

7
eVO 350
INTRODUCTION
8126300-795 eVO 350 Issue 1.2
Printed on June,2020
Congratulations on your purchase of the eVO 350 Slit Lamp.
This User Manual is designed as a training and reference manual for the operation and maintenance
of the instrument. We recommend that you read it carefully prior to use and follow the instructions to
ensure optimum performance of your new instrument. Properly trained eye care professionals such
as ophthalmologists, optometrists, opticians and eye care technicians should operate this instrument.
Please retain this manual for future reference and to share with other users. Additional copies can be
obtained from your authorized LABOMED dealer or from the LABOMED Customer Service Department at:
Tel: [phone]
Fax: [phone]
Email: [email protected]
INDICATIONS FOR USE
The eVO 350 Slit Lamp is an AC-powered slit lamp biomicroscope that is intended for use in examining
the anterior segment, from the corneal epithelium to the posterior capsule. It is used to aid in the diagno-
sis of diseases or trauma, which affect the structural properties of the anterior segment of the eye.
CONTRAINDICATIONS
None.

8
eVO 350
SETUP
8126300-795 eVO 350 Issue 1.2
Printed on June,2020
eVO 350 PACKAGE CONTENTS
1. eVO 350 Slit Lamp HL (8126300)
2. eVO 350 Slit Lamp LED (8126303)
3. User’s Guide (8126300-795)
ACCESSORIES
1. Focusing Rod (8124300-801)
2. Hex Wrench - 3mm (LK-003)
3. Hex Wrench - 4mm (LK-004)
4. Hex Wrench - 5mm (LK-005)
5. Dust Cover (PKG-107)
6. Halogen lamp,Main (8124300-401)
7. Rack Covers (8124100-206)
8. Replacement Fuses (8124900-900)
9. Chin Rest Paper-1 pack (8126000-786)
1
2
23
3
20
4
5
6
7
8
9
10
14
11
12
13
15
16
17
18
19
21
22
24
25
PART IDENTIFICATION
1. On/Off Switch
2. Illumination level Control
3. Glide Plate
4. Joystick for horizontal and
vertical movement
5. Bulb Access Door
6. Filter Dial
7. Slit Length Dial
8. Breath Shield Mount
9. Eyepieces
10. Focusing Ring
11. Fixation Light
12. Magnification Dial
13. Microscope Lock Knob
14. Slit Rotation Scale
15. Slit Width/Rotation Knob
16. Illumination Arm Lock Knob
17. Microscope Arm Lock Knob
18. Instrument Base Lock Knob
19. Guide Rail Cover
20. Geared Rollers
21. Chin Rest Assembly
22. Power Supply Assembly
23. Table Top
24. Patient Handles
25. Yellow Filter Knob(Wratten Filter)

9
eVO 350
SETUP (continued)
8126300-795 eVO 350 Issue 1.2
Printed on June,2020
UNPACKING AND INSTALLATION
1. Open the outside shipping box and remove the
three (3) inner boxes.
2. Remove the User’s Guide and follow it for Slit lamp
installation.
3. Open the box marked as ‘’Platform Assembly’’
and take out the table top and power supply bracket
(shown as “A”) in fig. 1.
4. Open the box marked as ‘’Chin Rest assembly’’ and
take out the complete chin rest assembly as
shown in fig. 2.
5. Assemble chin rest assembly to table top using
(6) Allen screws of M3, securing with help of Allen
wrench 2.5mm. refer fig. 3.
Figure-1 Table Top and Power Supply Bracket
Figure-2 Chin Rest Assembly
Figure -3 Chin Rest Attaching Screws
M 3 Screws
6 Nos.
A

10
eVO 350
SETUP (continued)
8126300-795 eVO 350 Issue 1.2
Printed on June,2020
UNPACKING AND INSTALLATION (continued)
7. Open the box marked as ‘’Microscope Assembly’ ’.
Remove the Microscope Assembly, Slit lamp
Assembly, Power Supply and Accessories. Refer to
Figure-5.
8. Install the Slit Lamp Assembly onto the tracks of
the Table Top and slide the Guide Rail Covers
around the tracks. Refer to Figure - 5.
9. Assemble the power supply bracket to the table
top using (2) M4 Allen screws provided with
it. Referred as (B) in fig.6 .
10. Assemble Power Supply to the table top just by
pushing into the hole shown as (C), refer fig. 7 .
11. Connect the power supply earthing wire with
table
top at point “D” using 3 mm Allen wrench. Refer
fig. 7 a.
12. Attach the Base Lamp Wire Connector to the back
of the Power Supply Assembly. Refer to Figure - 8.
13. Connect the Chinrest target light connector to
the Power Supply Assembly by plugging it in. Refer
to Figure 8.
14. Using the 4mm Hex Wrench, adjust the Patient
Handles by loosening the Allen Cap screws that are
securing them to the Chinrest Posts. Slide the
Patient Handles up or down to the desired height,
and secure them in place by tightening the Allen
Cap Screws. Refer to Figure - 9.
Figure- 4 Microscope, Base, Power Supply
&
Accessories
Accessories
Power
Supply
Microscope
Slit lamp Base
Slide
Figure- 5 Install Base
Figure- 7 Assembling Power Supply on the
Power Supply Bracket
C
D
Figure- 9a. Earthing wire attaching screw
Figure- 8 Connections
Chin Rest
Target
light
Connector
Base Lamp
Wire
Connector
Figure- 9 Adjusting Patient
Handle Height
Move
Handles
Up/Down
Allen Cap
Screws
Figure-6 Chin Rest G round
B

eVO 350
SETUP (continued)
11
8126300-795 eVO 350 Issue 1.2
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UNPACKING AND INSTALLATION (continued)
15. Install the Microscope Assembly onto the top of
the Arm by sliding it into position, making sure
it is up against the stop. Then, tighten the Lock
Knob located on the right side of the Microscope
Assembly. Refer to Figure-9.
Note: Do not adjust the microscope stop knob behind
the base of the microscope, or the vertex distance
will cause misalignment of focus and require re-calibra-
tion of the slit lamp assembly.
16. Remove the accessories and store them in an
appropriate place so that when they are needed
they will be available. Refer to Figure-10.
APPLICATION OF INPUT POWER
WARNING: CARE MUST BE TAKEN TO ARRANGE THE
CABLES FOR THE ACCESSORIES SUCH THAT THEY
DO NOT PRESENT A TRIPPING HAZARD TO THE
EXAMINER OR A DANGER TO THE PATIENT.
WARNING: POSITION THIS INSTRUMENT SO THAT IT
IS NOT DIFFICULT TO OPERATE THE DISCONNECTION
DEVICE (PLUG).
1. After the unit is in its secure location, apply the
correct input voltage to the instrument using the
Power Cord from the Accessory Tray.
Note: The power inlet is located on the backside of
the Power Supply Assembly.
2. Press down on the “|”located on the ON/OFF
Switch. Refer to Figure-11.
Note: The ON/OFF Switch will illuminate green when
there is power to the unit. When the ON/OFF Switch
is set to off, the green light will turn off.
DISCONNECTION OF INPUT POWER
1. At any time, the power switch can be set to OFF.
The unit does not have a power down sequence.
To terminate operation of this instrument, press the
ON / OFF switch to the OFF position (O).
2. If this instrument is intended to be OFF for an
extended period of time, it can be disconnected
from power by detaching the power cord from the
receptacle.
Figure -9 Install Microscope
Power
Cord Dust
Cover
Focusing
Rod
Chin Paper
Wrenches
Guide Rails Replacement
Bulb
Figure -10 Accessories
ON/OFF Switch
Figure-11 Power Supply Assembly
Microscope
Assembly
Turn Counterclockwise
Lock Knob
Slide

eVO 350
INSTRUCTIONS FOR USE
12
8126300-795 eVO 350 Issue 1.2
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OPERATION
1. Turn on the power using the On/Off switch located on the
front of the Power Supply Assembly. Brightness can be
adjusted by rotating the illumination level knob.
NOTE: The maximum position is for intermittent use only.
Continuous use will shorten the lamp/ LED life.
2. Insert the Focusing Rod in the pivot post of the instrument
body to make rough IPD and focus adjustments.
3. Position the light onto the flat surface of the focusing rod
and adjust the pupillary distance and focus of the eyepieces
to suit the needs of the operator. Refer to Figure-12.
4. Using the Slit Width Knobs, adjust the projected slit so
that the thinnest slit is shown on the Focusing Rod. Refer to
figure -12 and 15.
NOTE: The thinnest line will allow for greater accuracy.
5. Remove the Focusing Rod.
6. To position a patient, adjust the chin rest height by turning
the Chin rest Elevation Handle on the post of the Chin Rest
Assembly until the patient’s canthus is in line with the
canthus mark on the chin rest post. Refer to figure-13.
7. Microscope elevation is adjusted by rotating the joystick
and observing the slit image through the Microscope Assem-
bly until slit is centered on the patient’s cornea. Refer to
figure- 14.
8. Move the slit lamp with the joystick held firmly and slight-
ly angled toward the patient, until the slit appears sharply on
the cornea.
NOTE: The accuracy of this rough adjustment should be
checked by the naked eye. The fine adjustment is performed
while observing the slit through the microscope.
9. Tilt the Joystick, which is now held lightly at its upper end,
until the slit appears sharply at the depth of the eye which is
to be observed.
10. The horizontal motion of the base can be locked by tight-
ening the Base Locking Screw. Refer to figure-14.
NOTE: Lock the base whenever the lamp is not in use.
Height
Lock
Projected
Slit
Figure-12 Focus on Slit
Canthus
Mark
Chinrest
Elevation
Handle
Figure-13 Adjust Patient Height
Adjust Lamp Base
Figure-14 Adjust Height
Slit
Width/Rotation
Knob
Figure-15 Adjust Slit Width

eVO 350
INSTRUCTIONS FOR USE (continued)
13
8126300-795 eVO 350 Issue 1.2
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Figure-16 Illumination Angle
Figure-17 Illumination Angle Scale
Filter
Dial
Slit Length Dial
Figure-18 Filters and Slit Length
Slit Rotation
Scale
Figure-19 Slit Rotation Scale
E
Figure-18 a Yellow Filter knob
OPERATION (continued)
11. The slit width can be adjusted by rotating the Slit
Width/Rotation Knob on either side of the instrument.
Refer to Figure-15.
12. The angle between the illumination system and
the microscope can be varied between 0˚and 90˚ to
either the left or right. Refer to figure -16.
13. The illumination angle is indicated on the Illumination
Angle Scale on the slit lamp arm. Refer to figure -17.
14. Magnification is altered by rotating the Magnification
Dial on the Microscope Assembly. Refer to figure -16.
ADJUSTING SLIT LENGTH
The slit length is adjusted by rotating the Slit Length
Dial. The dial has five stops for adjustments. They
are 0.6, 5.8, 9, 13.5 mm diameter and continuous 1.5
to 12.0mm. They index into place. Refer to Figure-18.
FILTERS
The Filter Dial has four positions that index into place,
and are color coded to indicate the active filter. Refer
to Figure-18. The color coded index stops are as follows:
Blue dot = Cobalt Blue
White dot = Open
Red dot = Heat Absorbing
Green dot = Red-free
YELLOW FILTER (WRATTEN FILTER)
Yellow Filter in Slit Lamp is ideal in detecting subtle staining
caused by solution interaction with hydro gel contact
lenses.
The filter can be used for early detection of micro-puncture
corneal staining caused by contact lens/solution interaction,
early detection of the correlation between patient symptoms
and signs of dry eye syndrome, and better visualization
of RGP fluorescein patterns. Refer Figure- 18 a.
SLIT ROTATION
Slit rotation is achieved by grasping the Slit Width/
Rotation Knob and twisting the slit body to the left or
right. The degree of rotation is indicated by the Slit
Rotation Scale above the slit body. Refer to Figure-19.
Magnification
Dial

eVO 350
14
8126300-795 eVO 350 Issue 1.2
Printed on June,2020
WARNING: RISK OF ELECTRIC SHOCK. ALWAYS DISCONNECT
THE POWER CORD FROM THE WALL AND THE INSTRUMENT
BEFORE PERFORMING ANY OF THE FOLLOWING CARE AND
MAINTENANCE PROCEDURES.
EXTERNAL CLEANING
Clean the external surfaces of this instrument using a clean,
soft cloth moistened with a mild detergent solution
of liquid dish soap (filtered below 5 microns). Refer to figure
20.
FOREHEAD/CHIN REST PREPARATION
For hygienic reasons, wipe the forehead rest with an alcohol
wipe and change the chin rest papers after each patient.
Figure-20 Cleaning Main Unit
CLEANING, DISINFECTION & MAINTENANCE
CLEANING THE GUIDE PLATE
If the Guide Plate is dirty it may cause a rough feeling when Maneuvering the base of the slit lamp. Clean
the Guide Plate with a sift cloth lightly dampened with a mild soap and water solution.
USER ENVIRONMENT REQUIREMENT
•Maintain Operational Environment as specified in Specification section of this manual.
•Do not use this Instrument in corrosive environment to prevent rusting etc.
CLEANING & DISINFECTION
Following disinfectants are recommended for cleaning and disinfection.
1. Normal household bleach (Sodium hypochlorite 5%)- strength 5000 ppm(10 parts water 1 part bleach).
2. 70% Isopropyl alcohol.
Procedure:
• Take a muslin cloth.
• Moist it to feel wet
• Disinfect/clean the surface gently.
Note – 1. Use mask and Gloves while performing cleaning and disinfection.
2. While cleaning, muslin cloth should not be dripped wet to prevent seepage and rusting to running/bare parts.
3. Alcohol is flammable,its use as a surface disinfectant should be in well-ventilated spaces only.

eVO 350
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8126300-795 eVO 350 Issue 1.2
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CHANGING THE HALOGEN BULB
WARNING: NEVER REMOVE A BULB THAT HAS
RECENTLY BEEN IN USE AS IT WILL BE VERY HOT.
WAIT UNTIL IT HAS COOLED AND USE GLOVES OR A
THICK CLOTH WHEN HANDLING ANY HALOGEN BULB.
WARNING: NEVER TOUCH A HALOGEN BULB WITH
BARE HANDS AS FINGERPRINTS WILL SHORTEN THE
BULB LIFE.
1. Remove input power to the instrument.
2. Open the bulb door and pull out the bulb holder by
pulling the metal pins on the holder. Refer Figure 21.
3. Swing the retaining clamp from the bulb by loosen
the screw. Refer Figure 22.
4. Pull the bulb from the unit. Refer Figure 23. and
replace the bulb with the correct bulb as indicated in
the specifications section of this manual.
Note: Position the Bulb so the Cut Out in the metal
collar of the Bulb lines up with the Notch
in the lamp housing. Refer to Figure-24.
7. Move the Retaining Clamp back into its original
position. Refer to Figure-22.
8. Place the bulb holder back on the position.
9. Close the bulb door.
Figure-21 Bulb Holder
Figure-22 Retaining Clamp
Figure-23 Bulb
Retaining
spring
Retaining
Spring
Rotated
Bulb
Holder
Bulb Holder
Metal Pins
Retaining Clamp Screw
Bulb

eVO 350
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8126300-795 eVO 350 Issue 1.2
Printed on June,2020
CHANGING THE LED
(For LED illumination only)
WARNING: NEVER REMOVE A LED THAT HAS RECENTLY
BEEN IN USE AS IT MAY BE VERY HOT. WAIT UNTIL IT IS
COOLED.
WARNING: NEVER TOUCH A LED WITH BARE HANDS AS
FINGERPRINTS WILL SHORTEN THE LED LIFE.
1. Remove input power to the instrument.
2. Remove the Circlip by using circlip plier. shown as ‘’A’’
Refer Figure 24.
3. Lift up the illumination housing carefully.
4. Remove the Lamp Cover by unscrewing the Four
Screws by using screwdriver shown as ‘’B’’. Refer
Figure 25.
5. Unscrew the two M3 allen screws to disassemble the
Heat Sink by using 2.5 Allen wrench shown as ‘’C’’. Refer
Image 26.
6. Unscrew the LED from Heat Sink by unscrewing the Two
Screws shown as ‘’D’’. Refer to Figure 27.
7. Replace New LED and follow Reverse to complete
assembly.
A
Figure 24
Figure 25
Figure 26
Figure 27
B
C
D

eVO 350
17
Figure 31 Changing
Target Light LED Figure 31a Changing
Target Light LED
LED Cap Pull LED Bulb
8126300-795 eVO 350 Issue 1.2
Printed on June,2020
FUSE REPLACEMENT
Replace the fuses in the Power Input Module with the
fuses indicated in the Specifications section of this manual.
1. Remove input power to the instrument.
2. Press down on the top tab in the middle of the
Power Input Module to release the Fuse Holder,
and gently pull out the Fuse Holder by gripping the
two small tabs. Refer to figures-29 & 30
3. Open the Door to the Fuse Holder by pulling
it down. Refer to figure-30.
NOTE: The Fuses will pop up when the door is open,
making removal easier.
4. Install new fuses into the Fuse Holder that is
indicated in the Specification section of this manual.
5. Install the Fuse Holder by closing the door, and
pushing the Fuse Holder back until it snaps into place.
Replacement of Chin Rest Light Indicator
1. Unscrew the LED cap refer fig. 31.
2. Pull out the defective LED and replace with new LED.
refer fig.31a. Thread in the LED cap back.
NOTE: If New LED does not light up after switching on.
remove it and re-fix after changing its polarity.
Pull
Out
Tabs
Figure-29 Pull Out
Open
Door
Figure-30 Open Fuse Door
Notch Cut Out
Figure-28 Notches

eVO 350
TROUBLESHOOTING
18
Chart of Common Errors
ISSUE PROBABLE CAUSE POSSIBLESOLUTION
Lamp won’t turn on.
Incorrect input power supplied to
the eVO 350 Slit Lamp.
Check the outlet to ensure proper power in
being supplied.
Defective Power Cord.
Bulb may be blown out.
Replace the Power Cord.
Bulb not installed properly.
Bulb not installed properly.
Replace Bulb.
Defective Power Supply. Replace the Power Supply.
Slit Lamp won’t move.
Rubber stopper may be attached
under the joystick. Remove the rubber stopper.
Base Lock Screw may be tightened. Loosen the Base Lock Screw.
Rough base
movement.
Rubber stopper may be attached
under the joystick. Remove the rubber stopper.
Bearings may be damaged. Replace the base.
Shaft may be damaged. Replace the base.
Fixation light does not
light up.
Fixation Light Harness not plugged
into the Power SupplyAssembly.
Ensure the Fixation Light Harness is properly
seated in the Power SupplyAssembly.
Defective Power Supply. Replace the Power Supply.
Light too dim.
Incorrect wattage for bulb being used. Replace with the proper Bulb.
with bulb housing.
Double slit visible in
microscope.
Microscope not focused on focusing
rod before use.
Install focusing rod and check to ensure
microscope is focused on it.
Check bulb and ensure notch lines up
Check bulb and ensure notch lines up
with bulb housing.
8126300-795 eVO 350 Issue 1.2
Printed on June,2020
The following is a checklist of items that need to be assessed in order to determine if the eVO 350 Slit Lamp
requires servicing.
•Check the outside of the Slit Lamp for any damage or missing components.
•Inspect the power cord for damage.
•Test the lamp by turning the lamp on and turning the light all the way to it’s brightest setting, and
all the way down to its lowest setting.
•Check to ensure all switches are functioning properly.
•Check the filters by cycling through all the options.
•Check the Slit Wheel by cycling through all the options.
•Check the base movement.
The following chart outlines some common issues with the eVO 350 Slit Lamp and some steps you can
take to correct the issue. If problems persist, please contact the LABOMED as listed in the Introduction
section of this manual.

eVO 350
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Printed on June,2020
SPECIFICATIONS
Catalog Number 8126300-795
Physical Dimensions
Size: Weight, unpacked: 23.0 lbs. (10.4 Kg)
Height: 19.8 in. (50.2 cm) Weight, packed: 52 lbs (23.64 Kg)
Width: 10.5 in. (26.7 cm)
Depth: 14.0 in. (35.6 cm)
Electrical
voltage: 100-240 vAC
Power Input: Max 56-73vA
Frequency: 50/60 Hz
Fuses: T 1.6A L 250V
Halogen Bulb: (6V, 20 W), LED 5 Watt
OperationalConditions
Environmental 70°C
The environmental conditions are as follows:
Operating: -20°C
Temperature: 10° C (50° F) to 35° C (95° F)
Relative Humidity: 30% to 75% 80%
Atmospheric Pressure: 80 kPa (23.6 in. Hg) to
106 kPa (31.3 in. Hg) 10%
Transportation & Storage:
Temperature -20° C (-4° F) to +70° C (158° F). 106 kPa
kPa Relative Humidity: 10% to 80% (non-condensing)
Atmospheric Pressure: 50 kPa (14.8 in. Hg) to 50 kPa
106 kPa (31.3 in. Hg)
Exposure to extreme temperature conditions indicated above must not exceed 15 weeks.
Optics
Microscope Galilean
Mag Change 5 Step Drum Rotation
Eyepiece 12.5X
Mag Ratio 6.5X, 10X, 16X, 25X, 40X
IPD Range 48.5 - 77 mm
Diopter Adjustment +/- 5
Slit Illumination 6v 20W Halogen/ 5W LED
Slit Width 0 – 13.5 mm
0 – 13.5 mm
Slit Length
Slit Apertures 0.6, 5.8, 9, 13.5 mm and continuous 1.5 to 12.0 mm
Slit Rotation 0° - 180°
Filters Red Free, Heat Absorbing, Cobalt Blue

eVO 350
20
8126300-795 eVO 350 Issue 1.2
Printed on June,2020
SPECIFICATIONS (continued)
MOVEMENT RANGES
Longitudinal (In/Out) 100mm
Lateral (Left/Right) 107mm
Vertical (Up/Down) 30mm
Chin rest Range 80mm
DISPOSAL
This product does not generate any environmentally hazardous residues. At the end of its product life,
follow your local laws and ordinances regarding the proper disposal of this equipment.
SOFTWARE REVISION
There is no software installed in this unit.
Table Dimensions 18 1/2" x 12 10/16" (465 mm x 316 mm)