www.essilor-instruments.com
User manual
CONTENTS
I. INTRODUCTION 5
1. General description 6
2. Instrument classification 6
3. Specifications 7
a. Microscope 7
b. Slit illumination 7
c. Base 7
d. Chinrest 7
e. Power 8
f. Output voltage 8
g. Dimension and weight 8
h. Environmental conditions 8
II. SAFETY AND PRECAUTIONS 9
1. Precautions 10
2. Safety marks 11
3. EMC precautions 11
4. WEE precautions 11
5. Technical specifications 12
6. Marks on device 12
7. Indicator lamp 12
8. Installation and working condition 13
9. Component list 13
10. Transport and storage 13
III. NOMENCLATURE 15
IV. ASSEMBLY 19
1. Main parts check list 20
2. Assembly procedure 21
3. Checking procedure 25
V. OPERATION PROCEDURES 27
1. Preparation for diopter compensation and IPD adjustment 28
2. Patient position and use of the fixation point 30
3. Base operation 30
4. Operation of illumination system 31
5. Tips of operation process 34
VI. CLEANING 35
1. Method 36
2. Cleaning cycle 37
VII. MAINTENANCE 39
USER MANUAL> CONTENTS
1. Protection 40
2. How to adjust the slit width of the control knob 40
3. How to adjust the inclination of the illumination part 41
4. How to replace the fuse 41
5. How to replace the chinrest paper 42
6. Consumables 42
VIII. TROUBLESHOOTING GUIDE 43
IX. APPENDIX 45
USER MANUAL> CONTENTS
I. INTRODUCTION
The complete user manual is available on a web space.To access, please scan the QR code below
using a dedicated application.
Le manuel utilisateur complet est disponible sur un espace web. Pour y accéder veuillez scanner
le QR code ci-dessous à l'aide d'une application dédiée.
O manual do usuário completo está disponível na área web do cliente. Para acessar, scanear o
código QR abaixo usando a respetiva aplicação.
1. GENERAL DESCRIPTION
• This user manual is relevant for product SL350L and SL450L. It is based on relevant technical
specification and operation of the product.
• The classification of this instrument according to IEC 60601-1 is specified in this manual.
• Labels and marks required by IEC 60601-1 standard is stuck on the instruments and described in this
user manual.
• Slit lamp microscope adopts the latest LED light source which has low-voltage and low power
consumption, brightens evenly and has a good color reduction.
• Slit lamp microscopes are used to observe the disease of the anterior structures and tissue damage of
eyes.
2. INSTRUMENT CLASSIFICATION
This instrument is categorized to class I Type B according to IEC 60601-1 standard, which can not be used
under two circumstances:
1. A flammable anesthetic gas and air mixture,
2. Oxygen or nitrous oxide gas and air mixture.
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USER MANUAL> I. INTRODUCTION
3. SPECIFICATIONS
a. Microscope
TECHNICAL DATA VALUE
Type Galilean type
Magnification change
SL350L: Three positions revolving drum
SL450L: Five positions revolving drum
Eyepieces 12.5X
Angle between eyepieces 13°
Total magnification ratio
SL350L: 10X, 16X, 25X
SL450L: 6X, 10X, 16X, 25X, 40X
Pupillary adjustment 52 mm ~ 78 mm
Diopter adjustment ± 6D
Field of view
SL350L: 25X ( 8.5 mm), 16X ( 13.5 mm), 10X ( 22 mm)∅ ∅ ∅
SL450L: 40X ( 5.5 mm), 25X ( 8.5 mm), 16X ( 13.5 mm), 10X ( 22 ∅ ∅ ∅ ∅
mm), 6X ( 34.7 mm)∅
b. Slit illumination
TECHNICAL DATA VALUE
Slit width Continuously variable from 0 to 14 mm (at 14 mm, slit becomes a circle)
Slit lenght Continuously variable from 1 mm to 14 mm
Aperture diameters 14 mm, 10 mm, 5 mm, 3 mm, 2 mm, 1 mm, 0.5 mm∅ ∅ ∅ ∅ ∅ ∅ ∅
Slit angle 0° - 180°
Slit inclination 4 steps: 5°, 10°, 15°, 20°
Filters Heat-absorbing filter, ND filter, Red-free, Cobalt blue filter
Lamp 3V / 3W LED module
Luminance ≥60 klx
c. Base
TECHNICAL DATA VALUE
Longitudinal movement 110 mm
Lateral movement 110 mm
Vertical movement 30 mm
d. Chinrest
TECHNICAL DATA VALUE
Vertical movement 80 mm
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SL350L / SL450L - Slit lamp microscope > V2 - 03-2018
e. Power
TECHNICAL DATA VALUE
Input voltage 220V / 110V ~ ± 10%
Input frequency 50Hz / 60Hz
Power consumption 10VA (max)
f. Output voltage
TECHNICAL DATA VALUE
Light 6V (continuously adjustable)
Fixation 3V
g. Dimension and weight
TECHNICAL DATA VALUE
Dimension 740 mm x 450 mm x 500 mm
Gross weight 23 Kg
Net weight 17 Kg
h. Environmental conditions
PHASE TECHNICAL DATA VALUE
Transport
Temperature -40°C ~+55°C
Atmospheric pressure 800 hPa ~ 1060hpa
Relative humidity ≤90%
Storage
Temperature -40°C ~+55°C
Atmospheric pressure 800 hPa ~ 1060hpa
Relative humidity ≤90%
Use
Temperature +5°C ~ +40°C
Atmospheric pressure 800 hPa ~ 1060hpa
Relative humidity ≤80%
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USER MANUAL> I. INTRODUCTION
II. SAFETY AND PRECAUTIONS
General requirements for safety
Please read carefully about following precautions to avoid unexpected personal injury as well as the
product being damaged and other possible dangers.
1. PRECAUTIONS
1. In case there is any trouble, please first refer to the trouble-shooting guide. If it still can't work,
please contact with the authorized distributor or our repair department.
2. Do not use this instrument in the environment prone to fire and blast or where there is much dust
and with high temperature. Use it in room and simultaneously be careful to keep it clean and dry.
3. Check that all the wires are correctly and firmly connected before using. Ensure that the instrument is
well grounded.
4. Please pay attention to all the ratings of the electrical connecting terminal.
5. Turn OFF the main power first before replacing the main bulb, flash lamp and fuse.
6. When replacing the power cable, please use the power cable in accordance with the notes in the
instruction manual.
7. Don't touch the surface of the lens and prism with hand or hard objects.
8. To prevent the instrument from falling down to floor, it should be placed on the floor where the
inclination angle is less than 10°.
9. Read carefully the safety and other signals on this machine in order to use the product safely.
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USER MANUAL> II. SAFETY AND PRECAUTIONS
2. SAFETY MARKS
The safety marks, icons and warning symbols stuck on this instrument.
MARK DESCRIPTION
Type B
Manufacturing date
Class I The slit lamp is class I medical device
Type B English form of B type
WEEE mark: Please deal with the waste disposal produced by the machine following
relevant laws and regulations.
CE marking according to applicable directives
Date of first marking 12/2015
PN Part number
SN Serial number
I Power ON
O Power OFF
Output At the back of power supply box, indicate outlet of the power
Input At the back of power supply box, indicate input of the power
Fuse Rated value and current value (F1AL250V)
Power At the front of power supply box, switch the power ON and OFF
Voltage selector Switch the input voltage from 110V to 220V
The mark of light dimmer
3. EMC PRECAUTIONS
Other medical instruments and equipment which needs to be installed on the same site using with this
instrument shall comply with the same electromagnetic compatibility principle. The equipment which is
unable to comply with the electromagnetic compatibility or is known with poor electromagnetic compatibility
shall be installed 3 meters at least away from this equipment and powered by different power supply.
4. WEE PRECAUTIONS
Please dispose the waste electrical and electronic equipment in accordance with relevant regulations and
laws.
USER MANUAL> II. SAFETY AND PRECAUTIONS
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5. TECHNICAL SPECIFICATIONS
The slit lamp microscope is powered by network power supply. The following marks are required
permanently affixed to the instruments according to IEC 60601-1 Standard. The following table lists the tips
for your reference.
N° CONTENT INSTRUCTIONS
1 Manufacturer/ supplier Not brand
2 Figure /icon/ mark Detail in safety marks table
3 Connect to main power Detail in power specification
4 Power frequency, Hz Detail in power specification
5 Input power frequency Detail in power specification
6 Network output power N/A
7 Classification Detail in safety marks table
8 Working time No indication, work continuously
9 Fuse Detail in safety marks table
10 Output Detail in safety marks table
11 Physiological reaction No indication. N/A
12 AP/AGP type device No indication. N/A
13 High pressure terminal device No indication. N/A
14 Cooling condition No indication. N/A
15 Mechanical stability No indication.
16 Protective packing
Transportation are affixed to the outer packing carton,
which includes up, fragile, afraid of the rain, stacking limit,
stacking weight limit and so on.
6. MARKS ON DEVICE
The marks on power box of slit lamps.
MARK DESCRIPTION
Protective earth terminal
7. INDICATOR LAMP
There is indicator lamp on power switch. Green light indicates the power is on, and the instrument is
working.
• Model SL350L, when operating at maximum intensity, exceeds the threshold set by the safety
guidelines after 168 seconds.
• Model SL450L, when operating at maximum intensity, exceeds the threshold set by the safety
guidelines after 168 seconds.
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USER MANUAL> II. SAFETY AND PRECAUTIONS
8. INSTALLATION AND WORKING CONDITION
Slit lamps are network powered medical instrument. Please check pert the checking list after opening the
carton and install the instrument according to this user manual. Test and ensure the instrument operating
well before putting to use.
9. COMPONENT LIST
The following electronic components are used in this instrument.
N° COMPONENT NAME
1 Annulus transformer
2 Light dimmer potentiometer
3 SCR circuit boards
4 Power switch with indicator
5 Metal output socket with four pins
6 220V / 110V input voltage selector
7 Network power input socket
8 Light sauce (halogen/ LED lamp)
9 Fixation point
10 Fuse
11 Protective earth terminal
10. TRANSPORT AND STORAGE
No special requirements besides the content about transportation and storage of IEC 60601-1 standard.
USER MANUAL> II. SAFETY AND PRECAUTIONS
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III. NOMENCLATURE
With:
N° DESCRIPTION
1 Main power switch.
2
Brightness control knob: Avoid working continuously at high brightness or the service life of
the bulb will be shortened.
3
Joystick: Incline joystick to move the instrument slightly on the horizontal surface and
rotate it to adjust the elevation of the microscope.
4 Microscope arm locking knob: Lock the rotational movement of the microscopes arm.
5 Illumination arm locking knob: Lock the rotational movement of the illumination arm.
6
The indicate of relative angle between the microscope and illumination unit: Mark on the
angle mark ring of the illumination arm, which relates to the long mark of the microscope
arm, represent the two arms' angle when the ”0” on the ring relates to the short mark at
one side of the operator the right eyepiece may be blocked, and the side of the patient the
left eyepiece.
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USER MANUAL> III. NOMENCLATURE
7
The mark line on the ring of the microscope arm.
Together with (7) to indicate the angle between the microscope and illumination unit.
8 Magnification select dial: Five different magnifications are provided.
9 Prism box: Separate the prism box to adjust the interpupillary distance.
10 12.5X eyepieces.
11 Control plat of slit.
12 Slit height control knob.
13 Filter selection lever and display mark: The lever can choose different filters.
14
Aperture slit height and display window: It will display the diameter of the slit and the
aperture.
15
Lamp cap: With the function of protecting and insulating, its normal working temperature is
around 51°C.
16 Plug of lamp cap: It is connected with the power of the light unit.
17 Fixation knob of lamp cap: After fixing the knob, the lamp cap will not move.
18
Fixation target: Make the patient stare at it, it is convenient for checking Rotate this knob to
adjust the spot and the slit height. Swing the knob horizontally to revolve the slit.
19 Forehead belt: Make patient's head in an appropriate position.
20 Focusing test bar.
21 Fixation knob of chinrest paper: It is used to fix the chinrest paper.
22 Chinrest: Supporting the patient's chin.
23
Centering knob of illumination unit: Loosen the knob to allow the illumination light to move
from the center of the vision field for indirect retro-illumination. Fastening the knob can
bring the illumination light back to the center.
24
Slit width control knob: The slit width is continuously adjustable within the range from 0 to
14 mm.The markson the left knob stands for the approximant value of the width.
25
Illumination onclination lever: Four inclination stops are available from 5°up to 20°. The
interval between each is 5°.
26 Chinrest elevation adjustment knob: Rotate the knob to adjust the elevation of the chinrest.
27 Access line and plug of the brightness control.
28 Rail cover.
29 Work tabletop.
USER MANUAL> III. NOMENCLATURE
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IV. ASSEMBLY
All parts should be taken out with great care from the packing case before assembling.
1. MAIN PARTS CHECK LIST
NAME QUANTITY IMAGE
Chinrest part 1
Microscope part 1
Illumination part 1
Tabletop part 1
Rail cover 1
Breath shield 1
Input power cable 1
Focusing test bar 1
Dust proof cover 1
Chinrest paper 1
Screw driver 1
User manual 1
Packing list 1
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USER MANUAL> IV. ASSEMBLY
2. ASSEMBLY PROCEDURE
Open the box, and take out the tools: cross screw driver and spanner.
A F1AL250V fuse has been inserted into the power box.
Spare fuse are provided in the box.
Remove "A team" screws (4*M6 x20mm) under the tabletop.
Lift the tabletop to align its screw holes to the assembly holes of the instrument table and fix the
tabletop with the power switch facing to the operator.
Put down the wortable with the power panel facing the operator, refasten the bolt securely with the
spanner works well.
1
2
3
4
5
USER MANUAL> IV. ASSEMBLY
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1. "Up & Down" switch
2. White adapters
Remove the four screws of "B Team" with screw driver, and fix the chinrest part to the tabletop in the
way as below.
Take out the slit lamp part, put it on the rails of the tabletop, and echeck whether the wheels can be
rolled steadily on the rails.
Place the rail cover to the rail, remove four screws attached to the rail with the screw drive, retighten the
previously removed screws.
1. Locking screw on base
2. Rails
1. Rail cover
6
7
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USER MANUAL> IV. ASSEMBLY
Take out the binocular tubes of microscope part.
Match the groove on the binocular tubes with the pin on the microscope body. Fasten the fixing screw on
the body to the microscope.
Don't touch the objective lens and eyepieces during assembling.
1. Binocular tubes
2. Limit groove
3. Screw
4. Limit pin
5. Body
6. Insert
Remove the breathe shied fixation screw from the microscope arm.
Then, pass the removed screw thought the hole of the breath shield and then screw it into the arm
again.
Don't touch the objective lens and eyepieces during assembling.
1. Screw
2. Breath shield
Make sure the main power plug is not connected.
Take out the wire of brightness control knob on the base and connect it to the corresponding socket on
the power box. Insert the plug of chinrest bracket in the correct socket, and fasten it.
8
9
10
USER MANUAL> IV. ASSEMBLY
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1. Brightness control knob socket
2. Illumination lamp socket
3. Fixation lamp socket
4. Fuse box
5. Power socket
6. 110V / 220V voltage selector
Check the voltage selector, this power box support working under the voltage of 110V and 220V.
Please select the right voltage according to the voltage in your country.
Power box socket
There is a limit groove on the socket. Please align the plug with the groove.
Wrong power selection may lead to damage of the instruments.
Open the fuse box and make sure there is a fuse assembled.
Specification of the fuse: F1AL250V.
Collect tools and spare parts and put them into the drawer under the right side of tabletop.
11
12
13
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USER MANUAL> IV. ASSEMBLY
3. CHECKING PROCEDURE
This instrument supplies a 3-wire cable. Please select a proper power socket as matched. Ensure that
the instrument is grounded well.
A 3 pin cable is supplied with this instrument. Correct plug is supplied as well. Ensure the instrument is
grounded.
Marks on the power switch: “I” means power ON and “O” means power OFF. The main power switch
should be set at the "O" position before connecting the input cable with the power socket.
The indicator lamp will be lighted when the instrument is power ON.
Insert the focus test bar to right position. A light spot will be projected on the focus test bar. Rotate the
slit width knob to adjust the width of the spot and the light dimmer to adjust its brightness.
The fixation target is lighted.
Check the following part works flexibly:
1. Display window
2. Filter handle
3. Aperture knob
4. Joystick
5. Magnification drum
Rotate the light dimmer knob and the brightness will go dim.
1
2
3
4
5
6
7
USER MANUAL> IV. ASSEMBLY
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Turn OFF the main power and cover the instrument with the dust-proof cover after testing.
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USER MANUAL> IV. ASSEMBLY
V. OPERATION PROCEDURES
1. PREPARATION FOR DIOPTER COMPENSATION AND IPD ADJUSTMENT
Use the focusing test bar
The bar is a standard accessory for accurate adjustment of the microscope.
Insert it into the main shaft hole with the black flat surface facing the objective lens i.e. the direction of
the operator.
Remove the bar after testing.
1. Insert the test bar in the hole
2. The flat faces microscope
Brightness adjustment
Switch ON the main power.
Rotate the light dimmer to the central position.
Set the slit width at 2~3 mm.
With:
• - : Darker
• + : Brighter
1
1
2
3
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USER MANUAL> V. OPERATION PROCEDURES
Adjustment of diopter compensation
The focus of microscope is calibrated according to the emmetropia. If the operator is ametropia, he
should adjust the eyepiece diopter (see picture below) according to the following procedures:
Diopter adjustment ring
Rotate the diopter adjustment ring counter-clockwise to the end.
Rotate the ring clockwise until a fine slit image appears on the focusing text bar.
At this time, it is also the clearest observation of the reticule in the eyepiece.
Adjust the other eyepiece in the same way.
If necessary, record the diopter value on each eyepiece for future reference.
Interpupillary distance adjustment
Separate the prism box of the microscope with both hands to adjust the P.D. until both eyes could see
the same image on the focusing test bar through the eyepieces, and at the same time a stereo vision will
be obtained.
When adjusting, be sure that the eyepieces are at the same level
Prism box
1
2
3
4
1
USER MANUAL> V. OPERATION PROCEDURES
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2. PATIENT POSITION AND USE OF THE FIXATION POINT
The patient should put chin on the chinrest and push forehead against the forehead belt.
Position of the patient head
Adjust the elevation of chinrest until the light of slit lamp projects to the correct position of patient's eye.
1. Light
2. Belt
3. Chinrest
4. Handle
Move the tube to put the fixation target at a proper position.
The fixation point is used to attract patient's attention.
3. BASE OPERATION
Horizontal rough adjustment
Move the base back and forth to align microscope with patient's eye.
Vertical adjustment
Rotate the joystick to adjust the microscope's height until it aligns with the target.
Rotate the joystick clockwise to raise the microscope and counter-clockwise to lower it.
1
2
1
1
2
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USER MANUAL> V. OPERATION PROCEDURES
Horizontal fine adjustment
Tilt the joystick to move the microscope slightly on the horizontal surface and watch though the
eyepieces until a clear and sharp image appear on the field.
Locking the base
When finishing the adjustment, fasten the base locking screw to lock the base and prevent it from
sliding.
Locking screw
4. OPERATION OF ILLUMINATION SYSTEM
Changing the slit width
Turn the slit width control knob and the slit width will be changed from 0 mm to 14 mm.
The slit becomes a circle at the 14 mm size.
The width value is indicated approximately by the scale on the knob.
Show slit width
>
1
1
1
USER MANUAL> V. OPERATION PROCEDURES
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Changing the aperture and slit height
Rotate the aperture and slit height dial to get four round light spots of different diameter sizes: 14 mm,
10 mm, 5 mm, 3 mm, 2 mm, 1 mm, and 0.5 mm.
Besides the round spot, a wedge-shaped continuous slit spot will be got, whose length is from 1 mm to
14 mm. The value can be read on the display window.
1. Window
2. Aperture knob
Rotating the slit image
Swing the aperture and slit height control knob horizontally to revolve the slit image at any angle from
vertical to horizontal direction.
The angle of image rotation is indicated by the rotation angle scale with small division for 5° and big
division for 10°.
Angle scale
Decentering the illumination light
Loosen the centering knob to allow thelight spot moves off the center of themicroscope vision field for
sceral illumination.
Tighten the centering knob tore-center the slit image in the field of view of microscope
Center knob
1
1
1
2
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USER MANUAL> V. OPERATION PROCEDURES
Oblique illumination
In order to ensure the possibility ofconducting a binocular fundusexamination in optical cross section, the
anterior chamber lens should be used, the illumination unit is rotated through 90°with the aperture
control knob and with thelatch in stages of 5° (the range: 0°-20°), the illumination unit and the
microscope are turned to the center position.
Since the illumination part may touch the patient's head, operate carefully
Inclination lever
Filter selection
By rotate the filter dial, three different filters are provided.
For general observations, the heat-absorbing filter is placed in position.
Set the head the heat-absorbing filter in position after using the other filters.
Filter control handle
1
1
2
USER MANUAL> V. OPERATION PROCEDURES
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SL350L / SL450L - Slit lamp microscope > V2 - 03-2018
From the left to the right:
• No filter
• Heat-absorbing filter
• ND filter
• Red-free
• Cobalt blue
The no filter is used for proofreading for the manufacturer.
5. TIPS OF OPERATION PROCESS
• Read this user manual carefully to learn the structure and function of slit lamp for using the
instrument properly.
• In order to prevent the unnecessary observation misjudgment, read the scales on each knob
carefully.
• Operator should adjust the inter-pupillary distance and diopter correctly in advance in case
feeling uncomfortable during observation.
• Operator may feel dizziness in a long time observation. Take a rest after long time using of the
slit lamp.
• The patients' eyes will be exposed to the light of slit lamp. The light should be strong enough
for observation. Stop observation, if the patient feels uncomfortable. For serious situation
please seek for medical treatment. Therefore, avoid prolonged exposure of patients' eyes in
strong light.
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USER MANUAL> V. OPERATION PROCEDURES
VI. CLEANING
The replaced waste materials should be treated as industrial,rubbish.
1. METHOD
Cleaning the lens and reflecting mirror
If there is any dust on the lenses or reflecting mirror, wipe it off with soft cotton dipped in absolute
alcohol.
1. Objective
2. Reflecting mirror
Do not touch the lens with finger or hard object.
Cleaning the sliding pad, rails and shaft
Clean these parts with clean soft cloth regularly to ensure the stable movement of slit lamp.
1. Rail
2. Shaft
3. Slide plate
Cleaning and disinfecting the plastic parts
Clean the plastic parts such as chinrest bracket, forehead rest belt with soft cloth dipped in soluble
detergent or water, and then disinfect these parts with medicinal alcohol.
Don't wipe these parts with any corrosive detergent in case any surface damage caused.
1
1
1
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USER MANUAL> VI. CLEANING
2. CLEANING CYCLE
It required that the slit lamp should be stored and used in a clean environment. For prolong the service life
of the instrument please clean it regularly per as suggestions below.
1. Clean the eyepieces, objective lens and reflecting mirror:
Cycle: suggested once per two months.
The lenses and mirror are coated with antireflection coating and the reflective film. Although the
coating is strong enough, frequent wipe will lead to damage to the film, and thus affect the observed
optical effect.
Two months is a recommandation: if there is a lot of dust on the lens, please wipe it immediately.
2. Cleaning the slide pad, rails and shaft:
Cycle: suggested once per month.
Usually, these parts won't get dirty in normal use. We suggest cleaning these parts once per 6
months for getting smoother movement experience.
3. Cleaning the plastic parts:
Cycle: suggested once per day
These two parts contact with the patients directly, so please clean and disinfect these two parts
timely. Replace a piece of new and clean chinrest paper for each patient.
4. Cleaning the whole machine:
Cycle: suggested once per two months.
Life cycle of the slit lamp: 4 years.
USER MANUAL> VI. CLEANING
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VII. MAINTENANCE
Correct and periodical protection and maintenance will prolong the service life of the slit lamp. The
suggested maintaining cycle is once per two months.
1. PROTECTION
There are always dusts and physiological salt solution dropping into the main shaft hole of the illumination
ram during the operation. Please cover the main shaft hole with the protection cap lest the instrument would
be damaged. Take off the cap when the focus test bar needs to be assembled.
Protection cap
2. HOW TO ADJUST THE SLIT WIDTH OF THE CONTROL KNOB
If the slit width control knob is too loose, the slit width may be out of control. Fasten the locking screw
on right side clockwise with a hexagon type screw driver.
1. Left knob
2. Right knob
3. Locking screw on the right knob
Rotate the locking screw with a hexagon type screw driver.
If:
• The knob is too loose, adjust the screw clockwise.
• The knob is too tight, rotate the screw anticlockwise till the knob is comfortable to use.
1
2
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USER MANUAL> VII. MAINTENANCE
3. HOW TO ADJUST THE INCLINATION OF THE ILLUMINATION PART
If the inclination mechanism of the illumination part is too loose, fasten the screw on both sides of the
pivot point with the screw driver.
Screw
4. HOW TO REPLACE THE FUSE
Switch OFF the main power and remove the power cable from socket.
The fuse is inserted in the fuse box which has fuse mark.
Please rotate the fuse part out by pressing the fuse box with a screw or a coin.
One fuse is in use, the other is in spare. Please check them, if the one in use is burnt, please replace it
with the spare one and then place both the two fuse parts into original place.
Fuse specification: F1AL250V : 220V 1A, 250 V
Please select fuse of the same type, specification and rate value.
1
1
2
USER MANUAL> VII. MAINTENANCE
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5. HOW TO REPLACE THE CHINREST PAPER
Remove the two fixation bolts and place the new papers.
6. CONSUMABLES
1. Fuse: F1AL250
2. Bulb: 6V20W halogen bulb
The service life of the halogen bulb is 480 hours. However, it can still work beyond the time limit,
while the brightness of the bulb might be lower.
1
SL350L / SL450L - Slit lamp microscope > V2 - 03-2018
42
USER MANUAL> VII. MAINTENANCE
VIII. TROUBLESHOOTING GUIDE
In case there is any trouble, please check according to the following table for reference. If it still cannot
work, please contact the repair department of an authorized distributor.
TROUBLE POSSIBLE CAUSE REMEDY
No illumination
The cable isn't connected correctly with
the power socket
Connect the power cable correctly
The main power switch is on "O" position Place the switch on "I" position
The plug on the power box is loosen
Insert the plug firmly
The plug on the lamp cap is loosen
The bulb has burnt out Change the bulb
The fuse has blown Change the fuse
The bulb is not assembled properly Assemble the bulb properly
The filter lever is in the middle position or
in the position of gray filter
Set the filter lever to the correct
position
The brightness adjustment knob is at
minimum
Set the brightness adjustment knob
Slit is too dark
Voltage selector is wrongly set Set the voltage selector correctly
The coat of the reflecting mirror is oxidized Change the reflecting mirror
Too much dust on the reflecting surface Clean the surface with the brush
Fuse has blown
Voltage selector is wrongly set Set the voltage selector properly
The fuse doesn't comply with the
specification
Replace it with a suitable fuse
Slit width closes
automatically
The slit width control knob is too loose
Adjust the tightness of the control
knob
Fixation bulb is off The output plug is loose Insert the output plug firmly
SL350L / SL450L - Slit lamp microscope > V2 - 03-2018
44
USER MANUAL> VIII. TROUBLESHOOTING GUIDE
IX. APPENDIX
Electrical circle drawing
SL350L / SL450L - Slit lamp microscope > V2 - 03-2018
46
USER MANUAL> IX. APPENDIX
Essilor Instruments USA
8600 W. Catalpa Avenue, Suite 703
Chicago, IL 60656
Phone: 855.393.4647
Email: info@essilorinstrumentsusa.com
www.essilorinstrumentsusa.com
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