Service Manual
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XENION® HELION® Surgical Lighting System Service Manual
To the Service technician, Please read through this service manual with great care and comply with the safety information and requirements for servicing.
CE marking This item of equipment is a Class I medical device as defined by the European Medical Device Directive (MDD) 93/42/EEC, June 1993, Appendix IX. Conformity
The manufacturer declares that this product conforms to the fundamental requirements according to MDD Appendix I and documents this by means of the CE marking. What equipment forms the subject of this service manual?
The surgical lighting system with the following variants: • 1 to 4-fold suspension with the following types of lamp: HELION® with halogen lamp: • HELION S; HELION M/M+; HELION L/L+. XENION® with metal vapour lamp: • XENION M/M+; XENION L/L+. And the following optional equipment: • TFT flat screens 15“ and 19“, • HELION M/M+; L/L+; XENION M+ with fixed focus camera. • TruVidia camera system.
Technical Customer Service is at your disposal, • if you have any questions on disassembly, repairs or settings, or • if you would like to re-order spare parts.
How to contact us • TRUMPF KREUZER Medizin Systeme GmbH + Co. KG • Benzstrasse 26 • 82178 Puchheim, Germany Sales
• Telephone: +49 / (0)89 / 8 09 07 - 0 • Fax: +49 / (0)89 / 8 09 07 - 2 22
Service
• Telephone: +49 / (0) 180 / 2 25 41 35 • Fax: +49 / (0) 36 71 / 58 61 75 © TRUMPF KREUZER, 2004 • Edition: 03/2005, Version 1 (15.03.2005)
Visit us on the Internet
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www.Trumpf-med.com
7200791 Service Manual for the HELION ® XENION ® Surgical Lighting System GB
Notes relating to this documentation Copyright
We reserve the right to make changes
Copyrights Translations Trademarks
• The information contained in this service manual and parts thereof are the intellectual property of TRUMPF KREUZER Medizin Systeme GmbH + Co. KG and is protected by national and international copyright and other laws for the protection of intellectual property. • Any duplication, reproduction, translation, microfilming storage - in either electronic or magnetic form - processing as electronically or magnetically stored data, copying or distribution of these documents and/or the information contained herein or parts thereof without the prior written approval of TRUMPF KREUZER Medizin Systeme GmbH + Co. KG is hereby strictly prohibited. TRUMPF KREUZER Medizin Systeme GmbH + Co. KG shall assume no liability whatsoever on the basis of, or in association with, the use of said information prohibited in this manner by any person or company. • TRUMPF KREUZER Medizin Systeme GmbH + Co. KG reserves the right to amend, delete or modify in any other manner all information contained herein at any time and on any grounds without prior notice. We are constantly engaged on the further development of our products and reserve the right to make changes to the scope of supply in terms of design, equipment or technology. • TRUMPF KREUZER Medizin Systeme GmbH + Co. KG explicitly reserves all rights under the copyright laws. • The German-language version of this service manual shall be binding as regards translations into foreign languages. • The HELION® and XENION® lamps are registered trademarks of TRUMPF KREUZER Medizin Systeme GmbH + Co. KG. • All trademarks mentioned in this service manual are the sole property of the respective manufacturers.
7200791 Service Manual for the HELION ® XENION ® Surgical Lighting System GB
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Contents 1
Important Information for the Service TTechnician echnician ... 8
1.1 1.2 1.3 1.4 1.5
Information for the service technician ... 8 Tools and equipment required ... 8 Proper servicing ... 9 Warranty and liability ... 9 Disposal ... 9
2
Your Safety is Important to Us ... 10
2.1 2.2 2.3
Symbols used in this service manual ... 10 Symbols on the equipment ... 10 Overview of the most important safety information ... 11
3
Observe these W ork R ules ... 13 Work Rules
4
Table - TTroubleshooting roubleshooting and PPossible ossible R emedies ... 14 Remedies
5
Changing the LLamp amp ... 17
5.1 5.2 5.3 5.4
Changing the lamp of the HELION S ... 17 Changing the lamp of the HELION M/M+ / L/L+ ... 17 Changing the lamp of the XENION M/M+ ... 18 Changing the lamp of the XENION L/L+ ... 19
6
Setting the LLuminous uminous FField ield ... 20
6.1
Setting the luminous field for the HELION M/M+ / L/L+ ... 20 Setting the luminous field for the XENION M/M+ ... 21 Setting the luminous field for the XENION L/L+ ... 22 Setting the luminous field for the XENION M with fixed focus camera ... 22
6.2 6.3 6.4
7
Replacing the FFilter ilter Glass Assembly ... 23
8
Testing the Servomotor for the HELION M/M+ L/L+ ... 24
4
8.1 8.2
Testing the polarity of the servomotor ... 24 Testing the servomotor ... 25
9
Testing the Input V oltages ... 26 Voltages
9.1 9.2
Testing the input voltage of the transformer ... 26 Testing the mains fuse for the building power supply ... 26
7200791 Service Manual for the HELION ® XENION ® Surgical Lighting System GB
Contents 10 Testing the Electrics of the Support System ... 27 10.1 10.2 10.3 10.4
10.6 10.7 10.8 10.9
Testing the voltage at the sliding contact in the extension arm ... 27 Replacing the sliding contact in the extension arm/ Testing the slip ring on the central column ... 28 Dismantling the light head ... 29 Testing the cables in the spring arm that lead to the contact block in the extension arm ... 29 Testing the cables in the extension arm ... 30 Replacing the cables in the extension arm ... 31 Dismantling the central column ... 31 Replacing the slip ring ... 32
11 Testing the Electrics of the HELION M / L LLamp amp ... 33 11.1 11.2
Testing the voltage at the focus unit ... 33 Testing the voltages and cables in the lamp ... 34
12 Testing the Electrics of the HELION M+ / L+ LLamp amp ... 36 12.1 12.2 12.3
Testing the voltage at the focus unit ... 36 Testing the operating voltages, fuse and cables in the lamp ... 37 When the dimmer is defective ... 39
13 Testing the Electrics of the XENION M/M+ / L/L+ LLamp amp ... 40 13.1 13.2
Testing the operating voltages, fuses and cables in the lamp ... 40 When the dimmer is defective ... 42
14 Functional Check, HandOver and Customer Hand-Over Instruction ... 43 14.1 14.2 14.3 14.4
Important Information ... 43 Inspection intervals and authorised staff ... 43 Monitoring activities ... 44 Testing the function of the lamps ... 48
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Contents 15 TTechnical echnical Description ... 50 15.1 Data sheets ... 50 15.2 Circuit diagrams and set values ... 52 15.2.1 HELION M/M+; HELION L/L+; HELION XL+ .. 52 15.2.2 XENION M/M+; XENION L/L+ ... 53 15.2.3 XENION M / M+ ... 54 15.2.4 XENION L/L+ ... 55 15.2.5 HELION M+; HELION L+ with wall control panel ... 56 15.2.6 XENION M/M ; XENION L/L+ with wall control panel ... 57 15.2.7 24 V power supply AC/DC HELION M/M+; HELION L/L+ ; HELION XL+; XENION M/M+; XENION L/L+ ... 58 15.2.8 TruVidia combination with HELION M/M+; HELION L/L+; HELION XL+; XENION M/M+; XENION L/L+ lamps ... 59 15.2.9 7-pole plug -> cardanic suspension TruVidia 8-pole DIN socket ... 60 15.2.10 5-pole plug TFT LCD monitor with cardanic suspension; (optional DC/DC converter) ... 61 15.2.11 TFT LCD monitor ... 62 15.2.12 TFT LCD monitor with monitor power supply unit ... 63 15.2.13 Plug connector -> TruVidia spring arm ... 64 15.2.14 Plug connector -> spring arms 3-pole / 5-pole / 7-pole... 65 15.2.15 HELION M/L light head ... 66 15.2.16 HELION M/L light head with fixed focus camera ... 67 15.2.17 HELION M/L light head with TruVidia ... 68 15.2.18 HELION M+/L+ light head ... 69 15.2.19 HELION M+/L+ light head with wall control panel ... 70 15.2.20 HELION M+/L+ light head with fixed focus camera ... 71 15.2.21 HELION M+/L+ light head with TruVidia ... 72 15.2.22 HELION M+/L+ light head with fixed focus camera and wall control panel... 73
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7200791 Service Manual for the HELION ® XENION ® Surgical Lighting System GB
Contents 15.2.23 XENION M light head ... 74 15.2.24 XENION M light head with wall control panel ... 75 15.2.25 XENION M light head with fixed focus camera ... 76 15.2.26 XENION M light head with TruVidia ... 77 15.2.27 XENION L light head ... 78 15.2.28 XENION L light head with wall control panel ... 79 15.2.29 XENION L light head with TruVidia ... 80 15.2.30 XENION M+ light head ... 81 15.2.31 XENION M+ light head with wall control panel ... 82 15.2.32 XENION M+ light head with fixed focus camera ... 83 15.2.33 XENION M+ light head with TruVidia ... 84 15.2.34 XENION M+ light head with fixed focus camera and wall control panel... 85 15.2.35 XENION L+ light head ... 86 15.2.36 XENION L+ light head with wall control panel ... 87 15.2.37 XENION L+ light head with TruVidia ... 88 15.2.38 HELION/XENION transformer connector ... 89 15.3 Test report ... 90
16 TTechnical echnical Data ... 91
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1
Important Information for the Service Technician 1.1 Only for trained and authorised fitters Servicing in accordance with this service manual Use original parts only In case of problems
Defective parts Repairs outside the scope of the repair order No unauthorised or temporary repairs
Information for the service technician
This service manual is intended only for service technicians trained and authorised by TRUMPF KREUZER Medizin Systeme GmbH + Co. KG.
• Servicing must be carried out in steps according to this service manual. • The safety, reliability and performance of the equipment is only ensured where TRUMPF KREUZER original parts are used. • If, when dismantling, making repairs or settings, you encounter problems which are not covered by this service manual or not covered in sufficient detail, you should immediately contact your nearest TRUMPF KREUZER Customer Service Centre for your own safety and that of the hospital staff and patients. Only carry out repairs that you are familiar with from your training and which are included in this service manual. • Replace any defective parts with TRUMPF KREUZER original parts. If it should be necessary to replace parts outside the scope of the repair order, discuss this work with the customer first. • Unauthorised or temporary repairs are not permitted even if requested by the customer. Comply with all the requirements from the current laws, regulations and standards. • For information and to order spare parts please contact TRUMPF KREUZER Service (Telephone: +49 / (0) 180 / 225 4135).
1.2
Tools and equipment required
• Basic equipment: - fitter’s tool set, - cordless screwdriver • Measuring instruments: - luxmeter (for measuring light intensity), - voltmeter (for making electrical measurements). • For fitting/dismantling heavy components: - Lifting equipment with a permitted load of at least 200 kg. The lift must correspond at least to the height of the ceiling. - Ladder with necessary length. • Accessories: - cable ties
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7200791 Service Manual for the HELION ® XENION ® Surgical Lighting System GB
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Important Information for the Service Technician 1.3
Proper servicing
Observe the following rules when carrying out service work: Check the installation position of the cables Installing safety devices
Before the functional check
Check the PE connections Carry out functional check
• Put the cables back in their original installation position. Check the cables when positioning the lamp etc. to ensure they are not severed or squashed. • Install or renew all safety devices such as covers, cable ties, cable holders, cable shields, ground, equipotential bonding and earth connections. • Check cables that have been detached or been renewed against the circuit diagrams in this service manual to ensure they have been properly connected. • Check that the earth connections comply with the current standards in your country. • Carry out a functional check according to Chapter 14: “Functional Check, Hand-Over and Customer Instruction”.
1.4
Warranty and liability
TRUMPF KREUZER Medizin Systeme GmbH + Co. KG assumes no liability for the reliable and proper functioning of the surgical lighting system if:
• installation, modifications and repairs are not performed by TRUMPF KREUZER service technicians or persons authorised by TRUMPF KREUZER. • The electrical installation of the respective equipment does not comply with the regulations currently applicable. • The surgical lighting system is used other than for its intended purpose as stated in the operating instructions.
1.5
Disposal
• Please dispose of the packaging materials according to the applicable guidelines for disposal. • Observe that it is compulsory to recycle removed components, particularly electronic components and cables.
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2
Your Safety is Important to Us 2.1
Symbols used in this service manual
Important information is shown in this service manual and on the equipment using symbols and key words. Signal words such as DANGER, WARNING or CAUTION indicate the level of risk. This is visually emphasised by the different triangle symbols. The signs have the following meanings: DANGER
Failure to comply will certainly result in severe or even fatal injury.
WARNING
Failure to comply may result in severe or even fatal injury.
CAUTION
Failure to comply may result in minor or moderate injury or damage to property.
NOTE
Offers tips on usage and handy information.
Electric shock
Danger of an electric shock which may result in severe or even fatal injury.
Falling load
Danger of a falling load when in the installation area under a light system or following incorrect installation.
Sudden release of spring arm
Danger of sudden release of the spring arm when dismantling the lamps.
Biohazard
Danger of infection due to the lighting system not being cleaned and disinfected.
Laser radiation
Danger of eye damage due to the optional laser (Class 2) in the central hand grip.
Danger of tripping
Danger of tripping and falling over tools or components in the hospital staff’s path.
2.2
Symbols on the equipment
ATTENTION! Comply with operating instructions.
CE conformity marking with number 0123 of notified body. 10
7200791 Service Manual for the HELION ® XENION ® Surgical Lighting System GB
2 2.3
Your Safety is Important to Us
Overview of the most important safety information
Hazards from electric shock DANGER – power supply and emergency power supply:
During all servicing the building power supply and the emergency power supply must be de-energised all-pole disconnection and prevented from being switched back on again.
DANGER – Electric shock - High voltage 300 V:
The ballast in XENION lamps produces a starting voltage of 300 V: When carrying out measurements in the lamps and when the power is switched on: • cordon off the installation site, • avoid all contact with conductive parts.
Falling lighting system parts DANGER – Falling lighting system parts:
During servicing it is not permitted to stand under the lighting system.
Sudden release of spring arm WARNING - Sudden release of spring arm:
• The spring arm is under high tension. If the lamp is not removed in the uppermost spring arm position, the spring arm releases suddenly, springing upwards, and can cause serious injury. • Only dismantle the lamp when the spring arm is in the uppermost position.
Eye damage due to the optional laser WARNING – Laser radiation (LASER CLASS 2) Do not look directly at the beam from the central hand grip:
Laser radiation does not constitute a danger to persons who are not anaesthetised, due to the blink reflex. Nevertheless, to avoid damaging your eyes you should not look directly at the laser beam.
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2
Your Safety is Important to Us 2.3
Overview of the most important safety information (cont ’d) (cont’d)
Failure of the lamps during an operation WARNING – Failure of the spare lamp:
Always change both lamps. When replacing the lamp always replace the entire lamp unit. In the case of HELIUM models, the lamp base must also be replaced.
Damage to components of the lighting system CAUTION – Damage to lamps:
Handle and insert new lamps by the packaging film/using a soft cloth only.
Before initial operation of the lighting system WARNING – Malfunction:
Before the initial operation of the lighting system the electrical supply has to be checked and approved by qualified staff.
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Observe these Work Rules
WARNING – Risk of infection:
Ask a doctor about the possible risks (e.g. hepatitis B) of being a service technician. After consulting a doctor, get yourself vaccinated against hepatitis B. A booster is required every 10 years. Disinfection of the equipment must be organised in good time before servicing and must be carried out by the operator.
• Servicing must only be carried out on lighting systems which have been cleaned and disinfected, • Comply with hygiene guidelines concerning cleaning, disinfection and clothing, • Only work in the operating theatre with the permission of the user, • Observe the code of practice in force at the medical facility, particularly in the operating theatre, • If you have any symptoms, consult a doctor immediately. Inform your doctor that you have worked in hazardous areas – even after several months.
WARNING – Wear protective eyewear:
Wear protective eyewear in case of a possible risk to eyes, in particular when carrying out the following work:
• • • • •
hammering pins or similar components in/out, removing tensioned springs and fuses, when drilling, when soldering, when using solvents, cleaning agents or other chemicals.
CAUTION – Tripping and falling:
• Put dismantled components or tools somewhere that nobody can trip and fall over them. • Keep your work place clean and tidy during and after servicing.
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4
14
Table – Troubleshooting and Possible Remedies Fault LED lamp indicator lit up
Possible causes Lamp defective
Possible remedy Change lamp
Section 5
Luminous field too small/ luminous intensity too low
Maladjusted limit stops
Adjust luminous field
6
Noises in the light head
Loose parts in the light head/focus unit
Check light head/focus unit/ replace filter glass assembly or defective parts
7 ff.
HELION light head Inconsistent, off-centre luminous field with HELION M / M+/ L / L+ only
Possible causes Servomotor polarity incorrect/ servomotor defective
Possible remedy Check polarity of servomotor/replace focus unit
Section 8
No light
No input voltage
Check building power supply
9.1
Mains fuse of building power supply defective
Check mains fuse at automatic circuit breaker
9.2
Electrical connections for lamp, cardanic suspension, spring arm or extension arm interrupted
Check internal electrical supply lines of lamp, cardanic suspension, spring arm or extension arm
10
Defective sliding contact in extension arm
Replace sliding contact in extension arm/check slip ring on central column
10.1 10.2
Defective cable in light head/cardanic suspension
Check/replace internal electrical supply line in light head/ replace cardanic suspension
10.3 10.4
Defective cable in spring arm
Check/replace internal electrical supply line in spring arm
10.4 10.5
Defective cable in extension arm
Check/replace internal electrical supply line in extension arm
10.6 10.7
Defective slip ring on central column
Replace slip ring on central column
10.8 10.9
Contact areas burnt/damaged
HELION M / M+ / L / L+: Check operating voltage on focus unit/replace unit
11.1 12.1
Line contact on PCB in light head defective/ PCB defective/fuse on PCB defective/cables in light head defective
HELION M / M+ / L / L+: Check positioning of cables on PCB and control panel/ replace PCB/replace lamp supply lines
11.1 12.1
Line contact on PCB in light head defective/ PCB defective/fuse on PCB defective/cables in light head defective
HELION M / L: Check positioning of cables on PCB and control panel/ replace PCB/replace cables in light head
11.2
7200790 Service Manual for the HELION ® XENION ® Surgical Lighting System GB
4 Fault No light
No dimmer function
Table – Troubleshooting and Possible Remedies Possible cause Line contact on PCB in light head defective/ PCB defective/ fuse on PCB defective
Possible remedy Check positioning of cables on PCB and control panel/ replace PCB/replace fuse/ replace cables in light head
Section 12.2
Line contact on PCB in light head defective/ PCB defective/ fuse on PCB defective
Check positioning of cables on PCB and control panel/ replace PCB/replace fuse
13.1
Line contact on PCB/control panel in light head defective
Check positioning of cables on PCB and control panel
13.2
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4
Table – Troubleshooting and Possible Remedies XENION light head No light
16
No input voltage
Check building power supply
9.1
Mains fuse for building power supply defective
Check mains fuse at automatic circuit breaker
9.2
Electrical connection for lamp, cardanic suspension, spring arm or extension arm interrupted
Check internal electrical supply lines for lamp, cardanic suspension, spring arm or extension arm
10
Defective sliding contact in extension arm
Replace sliding contact in extension arm/check slip ring on central column
10.1 10.2
Defective cable in light head/cardanic suspension
Check/replace internal electrical supply line in light head/ replace cardanic suspension
10.3 10.4
Defective cable in spring arm
Check/replace internal electrical supply line in spring arm
10.4 10.5
Defective cable in extension arm
Check/replace internal electrical supply line in extension arm
10.6 10.7
Defective slip ring on central column
Replace slip ring on central column
10.8 10.9
Contact areas burnt/damaged
Check operating voltage at focus unit/replace unit
13.1
Line contact on PCB in light head defective/ PCB defective/fuse on PCB defective/cables in light head defective/ballast defective
Check positioning of cables on PCB and control panel/replace PCB/ replace fuse on PCB/ replace cables in light head
The halogen lamp does not light up when switched on
Halogen lamp defective/no power supply available
XENION L / L+ only: Replace lamp/check voltage of electronics
Only the halogen lamp lights up
Metal vapour lamp defective/power supply to electronics too low/high
XENION L / L+ only: Replace lamp/check LED indicator on the electronics/check voltage
No dimmer function
Line contact on PCB/potentiometer/ballast in light head defective
Check positioning of cables on PCB/potentiometer/control panel/replace potentiometer
Dimmer functioning incorrectly
Reversed potentiometer polarity
Change potentiometer polarity
13.1 5.4
13.2
7200790 Service Manual for the HELION ® XENION ® Surgical Lighting System GB
5 Figure 01
5.1
Changing the Lamp
Changing the lamp of the HELION S
The lamp does not light up. Removal:
1. Carefully turn the lamp holder 2 and remove it from the HELION S lamp 3. 2. Carefully remove the old lamp 1 from the lamp holder 2 and dispose of it in the appropriate manner. Installation:
3. Fit the new lamp 1 holding it by the packaging film/using a soft cloth and fit the components as described above, but in the reverse order.
Figure 02
5.2
Changing the lamp of the HELION M/ M+ / L/L+
The display 8 is lit up. The lamp is defective. Removal:
1. Unlock the central hand grip 2 by means of the unlocking device 1 and remove it. WARNING – Failure of the spare lamp:
• Always change both lamps. • When replacing the lamp always replace the lamp base too. 2. Undo the three screws 3 and remove the focus unit 4. 3. Unscrew the two cross-recessed head screws 5 and remove the old lamp 6 together with the base 7 by pulling it upwards and dispose of it in an appropriate manner. Installation:
4. Fit the new lamp 6 together with the base 7 holding it by the packaging film/using a soft cloth and fit the components as described above, but in the reverse order. 5. Insert the focus unit 4 into the lamp so that both the plug connectors 9 are aligned. 6. Tighten the three screws 3 by hand. 7. Attach the central hand grip 2.
7200790 Service Manual for the HELION ® XENION ® Surgical Lighting System GB
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5
Changing the Lamp
Figure 03
5.3
Changing the lamp of the XENION M/ M+
Removal:
1. Unlock the central hand grip 2 by means of the unlocking device 1 and remove it. 2. Undo the three screws 3 and remove the focus unit 5. 3. Remove the old metal vapour lamp 4 by pulling it upwards and dispose of it in an appropriate manner. Installation:
4. Fit the new metal vapour lamp 4 holding it by the packaging film/using a soft cloth and assemble the components as described above, but in the reverse order. 5. Insert the focus unit 5 into the lamp so that both the plug connectors 6 are aligned. 6. Tighten the three screws 3 by hand. 7. Attach the central hand grip 2.
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7200790 Service Manual for the HELION ® XENION ® Surgical Lighting System GB
5 Figure 04
5.4
Changing the Lamp
Changing the lamp of the XENION L/ L+
Removal:
1. Unlock the central hand grip 2 by means of the unlocking device 1 and remove it. 2. Undo the three screws 3 and remove the focus unit 9. 3. Turn the aperture attachment 5 45 degrees to the left (anti-clockwise) and remove by pulling upwards. WARNING – Failure of the spare lamp:
• Always change both lamps (supplied as a set). 4. Using a screwdriver, push out the old halogen lamp 4, remove it from the aperture attachment 5 and dispose of it in an appropriate manner. 5. Remove the old metal vapour lamp 6 by pulling it upwards and dispose of it in an appropriate manner. Installation:
6. Insert the halogen lamp 4 together with the accompanying plastic mount 8 into the aperture attachment 5. 7. Insert new metal vapour lamp 6 holding it by the packaging film/using a soft cloth. 8. Insert the aperture attachment 5 so that the surface 7 and the connector A are aligned. 9. Assemble the components as described above, but in the reverse order. 10.Insert the focus unit 9 so that both the plug connectors A are aligned. 11.Attach the central hand grip 2.
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6
Setting the Luminous Field
Figure 01
6.1
Setting the luminous field for the HELION M/M+ / L/L+
Setting is described using the HELION L as an example. Removal:
1. Unlock the central hand grip 2 by means of the unlocking device 1 and remove it. 2. Undo the three screws 3 and remove the focus unit 9. 3. Using an Allen key size 25 6: - unscrew the long cheese head screw 5 a short way, - screw the short cheese head screw 7 in a short way. Installation:
4. Fit the components as described above, but in the reverse order. WARNING – Electric Shock:
The following adjustments must be made with the power supply switched on. Cordon off installation site and proceed with great care. 5. Switch on the power supply and the lamp. 6. Mark the maximum and minimum luminous field diameters on the hand grip according to the lamp specification 8. Removal:
7. Switch on the power supply and the lamp. 8. Undo the three screws 3 and remove the focus unit 9. 9. With an Allen key size 2.5 6 adjust the long cheese head screw 5 and the short cheese head screw 7 according to the markings. Installation:
10.Fit the components as described above, but in reverse order. Functional test:
11. Carry out functional test. 12. Repeat procedure if necessary. 13. Fix the long cheese head screw 5 and the short cheese head screw 7 with screw-locking varnish.
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7200790 Service Manual for the HELION ® XENION ® Surgical Lighting System GB