Labomed SL 20i User manual

SL 20i
Slit Lamp
User Manual
Part No: 8126700-795
Issue 1.0
Printed on June,2019
To ensure proper use of this instrument as well as to avoid injury while operating
Instrument, understanding this manual completely before use is highly recommended.

8126700-795
2
SL 20i Issue 1.0
Printed onJune,2019
SL 20i
SL 20i 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 13485 Certified - LABOMED products are designed and manufactured under quality management system conforming
to ISO 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
8126700-795 SL 20i
SL 20i
Issue 1.0
Printed onJune,2019
TABLE OF CONTENTS
WARNINGS AND CAUTIONS 4
SYMBOL INFORMATION 6
INTRODUCTION 7
INDICATIONS FOR USE 7
CONTRAINDICATIONS 7
SETUP 8
PART IDENTIFICATION 8
SL 20i PACKAGE CONTENTS 8
ACCESSORIES 8
UNPACKING & INSTALLATION 9
APPLICATIONOF INPUT POWER 11
DISCONNECTION OF INPUT POWER 11
INSTRUCTIONS FOR USE 12
OPERATION 12
SLIT LENGTH 13
FILTER DIAL 13
SLIT ROTATION 13
CLEANING & MAINTENANCE 14
EXTERNAL CLEANING 14
FOREHEAD / CHIN REST PREPARATION 14
CLEANING THE GLIDE PLATE 14
CHANGING THE HALOGEN BULB 14
REPLACEMENT OF CHIN REST LIGHT INDICATOR 15
FUSE REPLACEMENT 15
TROUBLESHOOTING 16
CHART OF COMMON ERRORS 16
SPECIFICATIONS 17
DISPOSAL 18
SOFTWARE REVISION 18
SYSTEM CLASSIFICATION 18
RESTOCKING CHIN REST TISSUE 18
SYSTEM CONFIGURATION 19
GUIDANCE TABLES
20
WARRANTY 24

4
SL 20i
8126700-795 SL 20i Issue 1.0
Printed onJune,2019
WARNINGS AND CAUTIONS
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.
WARNING: DO NOT REPAIR OR SERVICE THIS INSTRUMENT WITHOUT AUTHORIZATION FROM THE
MANUFACTURER OTHERWISE YOU MAY LOOSE WARRANTY CLAIM. ANY REPAIR OR SERVICE TO THIS INSTRUMENT
MUST BE PERFORMED ONLY BY EXPERIENCED PERSONAL OR DEALERS 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
MUST BE AUTHORIZED BY LABOMED OTHERWISE FAILURE OF INSTRUMENT 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 OTHERWISE FAILURE OF 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 OF THE UNIT’S
POWER CORD. OTHERWISE FAILURE OF INSTRUMENT 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. IF ADJACENT OR STACKED USE IS NECESSARY, THE EQUIPMENT OR SYSTEM
SHOULD BE OBSERVED TO PERFORM NORMAL OPERATION IN SUCH CONDITION PRICE TO USE.
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 OCULAR 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, FOR THE INTERNAL
COMPONENTS, MAY RESULT IN INCREASED EMISSIONS OR DECREASED IMMUNITY OF THE EQUIPMENT OR
SYSTEM.

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8126700-795 SL 20i Issue 1.0
Printed onJune,2019
SL 20i
WARNINGS AND CAUTIONS (continued)
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.

SL 20i
6
The following symbols appear on the instrument:
LABOMED
REF
S/N
Rx
Only
EXPLANATION OF SYMBOLS
8126700-795 SL 20i Issue 1.0
Printed onJune,2019
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 devices to sale by or on the order of a physician.

7
SL 20i
INTRODUCTION
8126700-795 SL 20i Issue 1.0
Printed onJune,2019
Congratulations on your purchase of the SL 20i Slit Lamp.
This User Manual is designed as a training and reference manual for the Installation 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 profes-
sionals 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 SL 20i 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
SL 20i
SETUP
8126700-795 SL 20i Issue 1.0
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PART IDENTIFICATION
1. On/Off Switch
2. Illumination level Control
3. Joystick Tracking 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 changer lever
13. Observation Head Lock Knob
14. Slit Rotation Scale
15. Slit Control knob
16. Illumination Arm Lock Knob
17. Microscope Arm Lock Knob
18. Instrument base Lock Knob
19. Guide Rail Cover
20. Geared Rollers
21. Guide Rails
22. Fore head support
23. Power Supply Assembly
24. Table Top
25. Patient Handles
26. Observation Head
27. Chin Support
28. Target Rod
29. Slit Rotation Ring
30. Camera Cable Cover
31. Forehead Support Strap
SL 20i PACKAGE CONTENTS
1. SL 20i Slit Lamp HL (8126700)
2. User’s Guide (8126700-795)
ACCESSORIES
1. Focusing Rod Assembly (8126005-868)
2. Hex Wrench - 3mm (LK-003)- X54264
3. White Dust Cover (15120-225)
4. Halogen lamp (HF-9102)
5. Guide Rail Covers (15140-003)
6. Replacement Fuses (8124900-900)
7. Chin Rest Paper-1 pack (15140-006)
1
3
19
17 16
18
4
67
8
9
11
25
10
20
12
30
13
26
5
14
15
23
24
21
22
31
28
27
29
2

9
Fig.- 4 Chin Rest Ground
Fig.- 3 Chin Rest Attaching Screw
Figure- 1 Table Top
Figure-2 Chin Rest Assembly
B
M3 Screws
(6) Nos.
SL 20i
SETUP (continued)
8126700-795 SL 20i Issue 1.0
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UNPACKING AND INSTALLATION
1. Open the Cardboard shipping box to see the Ther-
mocol Box Inside.
2. Remove the User’s Guide and follow it for Slit
Lamp installation.
3. On Top of the Thermocol box Table top metal plate
form is placed as Shown in Figure-1. Take it out.
4. Open the Thermocol box. You will find following
Item Packed as Shown in Figure-2.
a) Chin Rest Assembly
b) Microscope Head with Eyepiece Mounted
c) Power Supply Box
d) Base Assembly
e) Patient Resting Handle
f) Illumination Arm Assembly
g) Accessories
- Slit Screen Rod -1
- Wheel Rail Cover -2
- Dust Cover -1
- Chin Rest Paper -100
- Power Supply Mounting Bracket -1
- Allen Keys - 2mm, 2.5mm, 3mm, 5mm
- Breath Shield -1
- Fuse T 1.6A L 250V -1
- Power cord -1
5. Assemble chin rest assembly to table top as shown
in Figure-4 using (6) Allen Screw of M3, securing
with help of Allen Wrench 2.5mm. Refer in figure-3.
6.Assemble the power supply bracket to the table top
using (2) M4 Allen screws with 3mm Allen key pro-
vided with Instrument. Referred as (B) in figure-4.
ab
c
d
f
g
e
Metal Plate

10
Chin Rest
Wire
Base Lamp
Wire
Figure- 8 Connections
Figure- 6 Illumination & Moving Arm Assembly
Figure- 5 Install Base
Figure. 7 Assembling Power Supply on the
Power Supply Bracket
Move
Handles
up or
down
Allen Cap
Screw
Figure- 9 Adjusting Patient
Handle Height
Figure- 7 a. Earthing wire attaching
screw
SL 20i
SETUP (continued)
8126700-795 SL 20i Issue 1.0
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UNPACKING AND INSTALLATION (continued)
7. Install the Slit Lamp Base Assembly onto the track
of the Table Top and slide the Guide Rail Covers
around the tracks. Refer to Figure-5. Lock the base
at any position to prevent any undesired movement
by using Base Locking Knob Shown as (A) in Fig. 5.
8. Assemble Illumination & moving arm assembly
onto the base using Allen Screw M6 as shown in
Figure.6.
9. Assemble Power Supply to the table top just by
pushing into the hole shown as (C), refer Figure-7.
10.Connect the power supply earthing wire with table
top at point “D”and “E”using 3mm Allen Wrench.
Refer Figure-7&7a.
11.Attach the Base Lamp Wire Connector to the back
of the Power Supply Assembly. Refer to Figure-8.
12.Connect the Chin rest target light Connector to the
Power Supply Assembly by plugging it in. Refer to
Figure-8.
13. Using the 3mm Hex Wrench, Assemble the Patient
Handles to the Platform Assembly as shown in
Figure.9.
C
D
E
Slide A

SL 20i
SETUP (continued)
Figure -9 Install Microscope
Figure -10 Accessories
Figure-11 Power Supply Assembly
Microscope
Cable Cover
Assembly X
11
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UNPACKING AND INSTALLATION
14. Install the Binocular Assembly & Eyepieces to the Magni-
changer using knob ‘X’.
15. Unscrew the Knob A Shown in Figure-5 to allow slit lamp to
travel on Metal Plate form.
16. Remove the accessories and store them in an Appropriate
place so that when they are needed they will be available.
Refer to figure-2 & 10.
17. Microscope is ready to use now.
APPLICATION OF INPUT POWER
WARNING: CARE MUST BE TAKEN TO ARRANGE THE CABLES
THRU CABLE COVER REFER FIGURE-9 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 Box.
NOTE: The power inlet is located on the backside of the Power
Supply Assembly.
2. Press down on the “I” located on the ON/OFF Switch. Refer
to figure-11.
NOTE: The Indicator just above 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.

SL 20i
INSTRUCTIONS FOR USE
12
Lock
Projected
Slit
Figure-12 Focus on Slit
Figure-13 Adjust Patient Height
Base
Figure-14 Adjust Height
Figure-15 Adjust Slit Width
Canthus
Mark
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OPERATION
1. Turn on the power using the On/Off switch located on the front
of the power supply. Brightness can be adjusted by rotating the
illumination level knob. Change the knob for brighten control.
NOTE: The maximum position is for intermittent use only.
Continuous use will shorten lamp 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. Set Magnichanger knob to 16x. Bring 10mm Aperture into the
light path by rotating aperture disc. Focus image on target rod.
Circular Image should be in the Centre of FOV as Shown in
Figure 12.
5. Using the Slit Width Knobs, adjust the projected slit so that
the thinnest slit is shown on the Focusing Rod. Refer to fig.
-12 & 15.
NOTE: The thinnest line will allow for greater accuracy.
6. Remove the Focusing Rod.
7. 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.
8. Microscope elevation is adjusted by rotating the joystick and
observing the slit image through the Microscope Assembly until
slit is centered on the patient’s cornea. Refer to figure-14.
9. Move the slit lamp with the joystick held firmly and slightly
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.
10. 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.
11. The horizontal motion of the base can be locked by tightening
the Base Locking Screw. Refer to figure-14.
Chin rest
Elevation
Handle
Height
Adjust Lamp
Slit
Width/Rotation
Knob

SL 20i
INSTRUCTIONS FOR USE (continued)
13
Figure-16 Illumination Angle
Figure-17 Illumination Angle Scale
Filter
Figure-18 Filters and Slit Length
Figure-19 Slit Rotation Scale
Magnification
Lever
8126700-795 SL 20i Issue 1.0
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OPERATION
NOTE: Lock the base whenever the lamp is not in use.
12. The slit width can be adjusted by rotating the Slit Width/
Rotation Knob on either side of the instrument. Refer to
figure-15.
13. The angle between the illumination system and the micro-
scope can be varied between 0°and 90°to either the left
or to right. Refer to figure-16.
14. The illumination angle is indicated in the scale of the slit lamp
arm. Refer to figure-17.
15. Magnification is altered by using lever on the Magnichanger.
Refer to figure-16.
SLIT LENGTH
The Slit length is adjusted by rotating the Slit Length Dial.
The dial has seven stops for adjustments. They are 1, 2, 3, 5, 8, 10
and 14. They index into place. Refer to figure-18.
FILTER DIAL
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
Yellow dot = Open
Green dot = Red-free
SLIT ROTATION
Slit Rotation is achieved by Rotating the Slit Rotation Ring. Refer
item no. 29 on Page 8. The degree of rotation is indicated by the
Slit Rotation Scale above the slit body. Refer to figure-19.
Slit Rotation
Scale
Slit Length Dial
Dial

SL 20i
CLEANING AND MAINTENANCE
14
Figure-20 Cleaning Main Unit
Figure-21 Retaining Spring
Figure-22 Bulb
Figure-23 Notches
8126700-795 SL 20i Issue 1.0
Printed onJune,2019
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.
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.
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 HAN
-DLING 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 by rotating the Screw with hand as shown
in Figure 20.
3. Swing the retaining spring away from the Bulb.
Refer to figure-21.
4. Pull the Bulb Holder and Bulb from the unit. Refer fig.-22.
5. Replace the Bulb with the correct Bulb as indicated in the
Specifications section of this manual.
6. Place the Bulb Holder back into the lamp housing.
NOTE: Position the Bulb Holder so the cut out in the metal
collar of the Bulb lines up with the Notch in the lamp housing.
Refer to figure-23.
7. Move the retaining spring back into its original position.
Refer figure-21.
8. Close the bulb door.
Bulb
Bulb
Holder
Retaining
spring
Screw
Notch
Cut Out
Bulb
Holder
Retaining
Spring
Rotated

SL 20i
LED Cap
Pull LED Bulb
Figure-28 A Changing
Target Light LED
Figure-28 Changing
Target Light LED
15
8126700-795 SL 20i Issue 1.0
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Pull
Out
Tabs
Figure- 29 Pull Out Fuse Door
Fuses
Open
Door
Figure-30 Open Fuse Door
Replacement of Chin Rest Light Indicator
1. Unscrew the LED cap refer fig.-28.
2. Pull out the defective LED and replace with new LED.
refer fig.-28A. 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.
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-29.
NOTE: The Fuses will pop up when the door is open, making
removal easier.
4. Install new fuses into the Fuse Holder that is indi-
cated 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.

SL 20i
TROUBLESHOOTING TABLE
16
Chart of Common Errors
ISSUE PROBABLE CAUSE POSSIBLE SOLUTION
Lamp won’t turn on.
Incorrect input power supplied to
the SL 20i Slit Lamp.
Check the outlet to ensure proper power is
being supplied.
Defective Power Cord. Replace the Power Cord.
Bulb may be blown out. Replace Bulb.
Defective Power Supply. Replace the Power Supply.
Slit Lamp won’t move. Base Lock Screw may be tightened.
Rough base
Movement.
Bearings may be damaged.Replace the base bearing Assembly including
Shaft and Sleeve.
Replace the base bearing Assembly including
Shaft and Sleeve.
Shaft may be damaged.
Fixation light does not
light up.
Fixation Light Harness not plugged
into the Power Supply Assembly.
Ensure the Fixation Light Harness is properly
seated in the Power Supply Assembly.
Defective Power Supply. Replace the Power Supply.
Light too dim.
Incorrect wattage for bulb being used.
Bulb not installed properly. Check bulb and ensure notch lines up 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.
Bulb not installed properly. Check bulb and ensure notch lines up with
bulb housing.
8126700-795 SL 20i Issue 1.0
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Loosen the Base Lock Screw.
Replace with the proper Bulb.
The following is a checklist of items that need to be assessed in order to determine if the SL 20i 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 SL 20i 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.

SL 20i
SPECIFICATIONS
17
Catalog Number 8126700-795
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: 100-240V AC
Power Input: Max 56-73vA
Frequency: 50/60Hz
Fuses: T 1.6A L 250V
Halogen Bulb: 6V,20W
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)
Transportation & Storage: 10%
Temperature: -20°C (-4°F) to +70°C (158°F). 106
kPa Relative Humidity: 10% to 80% (non-condensing)
Atmospheric Pressure: 50kPa (14.8 in. Hg) to
106 kPa (31.3 in. Hg) 50 kPa
Exposure to extreme temperature conditions indicated above must not exceed 15 weeks.
Microscope
Mag Change
Eyepiece
Mag Ratio
IPD Range
Diopter Adjustment
Slit Illumination
Slit Width
Slit Length
Slit Apertures
Slit Rotation
Filters
Galilean
2 Step Turret Rotation;
12.5X/18mm; Optional: 10X/18mm
10X, 16X
49 -78mm
+/-5mm
6v 20W Halogen
0 – 14mm
0 – 14mm
1, 2, 3, 5, 8, 10 And 14
0°-180°
Red Free, Cobalt Blue
8126700-795 SL 20i Issue 1.0
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18
8126700-795 SL 20i Issue 1.0
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SL 20i
SPECIFICATIONS (continued)
Movement Ranges
Longitudinal (In/Out) 80mm
Lateral (Left/Right) 109mm
Vertical (Up/Down) 30mm
Chin rest Range 80mm
Fine movement 13mm
(Cross Slide)
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.
SYSTEM CLASSIFICATION
•Classification of applied part by grade of protection against electric shocks: B type applied part
B type applied part provides a certain grade of protection against electric shocks, particularly
with regard to leak current, measuring current for patient, and reliability of connection to
protective facility (Class I equipment).
•Type of protection against electric shocks: Class I equipment
Class I equipment does not depend on basic insulation only for electric shocks; it also provides
means for connecting the equipment to a protective grounding system so that the accessi
-ble metal parts do not become conductive in case of failure in the basic insulation.
•Grade of protection against a hazardous ingress of water: IPxO
This product does not provide protection against ingress of water.
(Grade of protection against a hazardous ingress of water stated by IEC 60529: IPxO)
•Classification by the method of sterilization/disinfection: None
This product has no part requiring sterilization/disinfection.
•Classification of safety of use in an environment containing air/combustible gas, oxygen or
nitrogen monoxide/combustible anesthetic gas: Equipment not suited for use in an environment
containing air/combustible gas, oxygen or nitrogen monoxide/combustible anesthetic gas
Use this product in an environment not containing combustible anesthetic gas and combusti
-ble gas.
•Classification by mode of operation: Continuous operation equipment
Continuous operation refers to an operation under normal load conditions without exceeding
specified temperatures, without a limit of time.
RESTOCKING CHINREST TISSUE
When the chinrest tissue supply is depleted, pull out the chinrest tissue pins and replace the tissue.

SL 20i
19
8126700-795 SL 20i Issue 1.0
Printed onJune,2019
SYSTEM CONFIGURATION
DBS
DSLR ADAPTER
SONY HANDICAM ADAPTER
I-PHONE ADAPTER
ZEISS ADAPTER KIT H.S ADAPTER KIT
SBS WITH VIDEO OUTPUT
CCD ADAPTER
8122500
8122600-800
6134131
6134110
6134120
6134172
I-PHONE-6
(6134172-1-6)
I-PHONE-6 PLUS (6134172-1-6P)
8122600-8518122600-852
CCD CAMERA
I-PHONE [phone])
SONY HANDICAM
6134120-122
I-PHONE-7 PLUS (6134172-1-7P)
I-PHONE-X (6134172-1-10)
6134130-113
6134131-107
CCD CAMERA
TONOMETER MOUNT
8122595-812

SL 20i
GUIDANCE TABLES
Table 201 – Guidance and Manufacturer’s Declaration
Electromagnetic Emissions
All Equipment and Systems
Guidance and Manufacturer’s Declaration – Electromagnetic Emissions
The SL 20i is intended for use in the electromagnetic environment specified below. The
customer or user of the SL 20i should ensure that it is used in such an environment.
Emissions Test Compliance Electromagnetic Environment
- Guidance -
RF Emissions
CISPR 11
Group 1
Class A
Harmonics
IEC 61000-3-2 Class A
Flicker
IEC 61000-3-3 Complies
8126700-795 SL 20i Issue 1.0
Printed onJune,2019
20
The SL 20i uses RF energy only for its internal
function. Therefore, its RF emissions are very low and
are not likely to cause any interference in near by
electronic equipment.
The SL 20i is suitable for use in all establishments,
other than domestic, and those directly connected
to the public low-voltage power network that supplies
building used for domestic purposes.