1021-7196

Service Manual

The information, illustrations, illustrations, tables, drawings, drawings, and specifications specifications in this document are subject subject to change without notice.

®

Ellex , Tango™, Solo™, Ultra Q™, Total Solution™, and the Ellex logo, are trademarks of Ellex Medical Pty Ltd. Teflon™ is a trademark trademark of E. I. du Pont de Nemours and Company, Company, Delaware US. US. All other trademarks and and copyrights are the property of their respective respective owners.

This manual describes describes how to service the Tango (LT5106-T), Solo (LT5106-S) and Ultra Q (LQP3106-U) (LQP3106-U) ophthalmic lasers. These devices are manufactured in Australia by Ellex Medical Pty Ltd.

Tango, Solo and Ultra Q Service Manual

Contents

Contents

2.1

Before first use.........................................................................................................15

2.2

Precautions during use.............................................................................................16

2.3

Warnings..................................................................................................................16

2.3.1

Electrical safety ................................................................... ............................... 16

2.3.2

Aiming laser ............................................................ ........................................... 16

2.3.3

Treatment laser ................................................................. ................................. 16

2.3.4

Eye safety .................................................................. ........................................ 17

2.3.5

Reflection...........................................................................................................17

2.3.6 2.3.7

Fire hazard ................................................................. ........................................ 17 Electromagnetic compatibility ....................................................................... ......17

2.3.8

Physical safety .................................................................... ............................... 17

2.3.9

Warning signs .................................................................... ................................ 17

2.4

Safety interlock ................................................................ ........................................ 18

2.5

Laser safety monitoring ....................................................................... .....................18

3.1

Functional overview..................................................................................................19

3.1.1

Laser technology................................................................................................19

3.1.2

Medical advantages ............................................................... ............................ 21

3.1.3

Photodisruption..................................................................................................21

3.1.4

Selective laser trabeculoplasty (SLT)...................................................................23

3.2

General device description ...................................................................... .................23

3.2.1 3.2.2

Electrical block diagram ................................................................... ..................23 Optical path block diagram.................................................................................24

3.2.3

Overview...................... ..................................................................... .................24


5.1

Overview..................................................................................................................57

5.2

Standard calibration procedure flowchart ................................................................. 58

5.3

Energy definitions.....................................................................................................59

5.4

Standard calibration procedure ........................................................... .....................6 0

5.4.1

Voltage window test............................ ............................................................... 60

5.4.2

YAG diode aiming module (YAG DAM) ............................................................... 61

5.4.3

YAG energy monitor.................................................. ......................................... 62

5.4.4

YAG energy prediction ....................................................................... ................63

5.4.5 5.4.6

SLT diode aiming module (SLT DAM) ................................................................. 64 SLT energy monitor............................................................................................65

5.4.7

SLT energy prediction ......................................................................... ...............66

5.5 5.5.1

6.1

Other calibration procedures ..................................................................... ...............67 KTP crystal energy ................................................................... .......................... 67

Service and Engineering modes ................................................................ ...............71

6.1.1

Service mode.....................................................................................................71

6.1.2

Engineering mode ................................................................. ............................. 72

6.1.3

Display .................................................................. ............................................. 73

6.1.4

Menu options.....................................................................................................75

6.2

Error codes .................................................................... .......................................... 78

6.3

Error messages........................................................................................................79

6.4 6.5

Energy warnings and errors......................................................................................80 Cavity performance ................................................................... ............................... 81

6.5.1

Check burn pattern

.....................81

Contents

7.16

Fixation lamp..........................................................................................................115

7.17

Folding mirror (YAG) ..................................................................... .......................... 116

7.18

Interlock board.......................................................................................................117

7.19

Joystick ................................................................ ................................................. 118

7.20

Keyswitch ............................................................. ................................................. 122

7.21

Laser power switch .......................................................... ...................................... 123

7.22

Objective lens.........................................................................................................124

7.23

Power indicator................................................................ ...................................... 125

7.24

Power supply (DC) ............................................................... .................................. 126

7.25

Power supply (YAG) ............................................................ ................................... 127

7.26

Prism tower............................................................................................................129

7.27

Safety filter ............................................................ ................................................. 130

7.28 7.29

SLT delivery carriage................................................................... ........................... 131 Trigger (see YAG laser cavity) ...................................................................... ...........131

7.30

YAG laser cavity............................ ..................................................................... ....132


1

Overview

Overview

1.2

Who should read this manual This manual assumes that you are a fully trained and qualified Ellex Service Technician, with access to the appropriate Ellex Service Toolkit(s).

1.3

How to provide feedback to Ellex Ellex welcomes your feedback on the accuracy and effectiveness of this document. Please send feedback to Ellex Global Service ([email protected]). Ensure that the document name and part number (see the footer of each page) are clearly identified, and refer to page number(s) where appropriate.

1.4

How this manual is updated Ellex Service Bulletins released since the publication date of this manual may provide corrections or updates to this issue of the service manual.

1.5

Device description Refer to the user documentation supplied with the device.

1.5.1

Laser aperture The location of the laser aperture is shown below. The laser aperture label is placed immediately below the aperture


1.5.2

Compliance label

Manufacturer

REF

Device model designation (Solo: LT5106-S, Tango: LT5106-T, Ultra Q: LQP3106-U)

SN

Serial number Date of manufacture Recycling symbol Reminds the user to use recycling methods when disposing of this product Type B equipment symbol The equipment provides protection against electric shock through the limiting of leakage current and the provision of a protective earth connection.

Overview

Ultra Q (LQP3106-U)

1.6

Specifications Refer to the user documentation supplied with the device.

1.7

Product history

1.7.1

Software Release numbering for the Tango and Ultra Q is separate from Solo software releases.

Tango and Ultra Q Version 5 Released

22 June 2009

Technical Bulletin No.

TB-09-01 (latest)

Upgrade Details

Optional for systems prior to S/N TG0989 (and UQ0641). An upgrade kit is available from


Improved half-wave plate positioning

The attenuator is moved to the zero position and then to the n ew position every time the energy is changed by the operator. This provides more consistent positioning of the half-wave plate and is noticeable when adjusting the YAG and SLT ZERO value.

Energy monitor calibration

Energy monitor set points are recalled during calibration.

DAM calibration

DAM set point is recalled at the start of DAM calibration, rather then resetting to 0.

E10-S

(Tango only) E10-S was displayed if the pulse detector sensed a fault in SLT mode. The fault is now corrected reported as E10-Y, as the fault is in the YAG attenuator.

Energy

Measured energy from the internal test fire is now used as a basis for any

measurement

energy change. Previously, the predicted (or set) value was used.

Version 6 Version 6 was not released (internal Ellex use only).

Version 7 Released

29 June 2010


TB-10-01 (latest)

Upgrade Details

Optional for systems prior to S/N TG1300 (and UQ0800). An upgrade kit is available from www.ellex.com.

User related changes

None

Service related changes

Energy prediction

Based

customer feedback,

prediction algorithm

used in V4

Overview

Solo Version 6 Released

22 June 2009


TB-09-02 (latest)

Upgrade Details

Optional for systems prior to S/N SL0400. An upgrade kit is available from www.ellex.com.

User related changes

As documented in User Guide Amendment No. 8.

Service related changes

Voltage window test

Now performed with the attenuator in the 100% open transmission position for consistency. Previous version based the single, double and triple pulse voltages on 50%, 60% and 60% (respectively) of the voltage window. To reduce the possibility of over pulsing, the voltage is now calculated using 40% for single, double and triple pulse voltages.

Automatic under and over-pulse

Previously, if an under or over-pulse was detected only an error was reported.

correction

The follow actions now take place if an und er or over-pulse is detected. Over-pulse Emits a warning and device reverts to STANDBY Voltage in use is reduced Test fire occurs at the new voltage to verify pulses If four over-pulses are detected after four repeated over-pulse correction attempts, an EO4 error displays Under-pulse Emits a warning and device reverts to STANDBY


1.8

Tools and equipment To service these SLT and YAG devices, you require the following items: 

Tango/Ultra Q/Solo/Super Q Service Toolkit.



A calibrated laser power/energy meter that must be traceable to the US National Institute of Standards and Technology (NIST), or other international standard. It must be able to measure the full laser power/energy range at the treatment and aiming beam wavelength(s) that these devices emit.

1.8.1

Burn paper Burn paper is used to check alignment and must be conditioned before use.

To condition burn paper 1

Tear off a strip of burn paper from the roll.

2

Expose the strip in normal office light conditions for 15 minutes before use (or under intense light or sunlight to hasten the process). The paper is ready when it changes from pink to grey.

1.8.2

Alignment jig The alignment jig includes a target plate. One side of the plate is covered in matt black insulating tape and the other side is bare.

Overview

Membrane holder

Rubber ring

Membrane

sm_tsu_0001

1.9

Routine maintenance

1.9.1

Frequency The Tango, Solo and Ultra Q should be routinely serviced every 12 months.


2

Safety

Safety

2.2

Precautions during use Follow these precautions when you use the device: 

Do not operate the laser unless it is correctly positioned on a level, stable surface.



Do not adjust or change settings when the laser is fired.



Remove the key from the console when the laser is not in use, to protect the device from unqualified use.



Do not operate the laser unless the eye safety filter is in place in the delivery device.



Carefully handle optical fibres and delivery systems, and regularly inspect them for damage.



Ensure that delivery devices and opt ical fibres are correctly connected before using the device.



2.3

Regularly inspect the safety filter.

Warnings Do not operate the device until you are familiar with all the precautions. Do not use the device if you experience an abnormal operating condition. Contact your Authorised Ellex Distributor.

2.3.1

Electrical safety To ensure adequate electrical safety, you must connect this device to a mains power outlet that has a


2.3.4

Eye safety Everyone attending the procedure (except the physician and patient) must wear safety glasses, goggles or masks designed to prevent transmission of the treatment beam. Safety glasses of optical density (OD) 5 (minimum) are required for the treatment wavelength. Appropriate safety glasses should be made available close to the door outside the treatment room. Safety glasses, or safety filters providing protection from other wavelengths, may not offer any protection from the treatment wavelength and should not be used. Ordinary spectacles offer no protection.

(Europe) Safety eyewear must have a protection class of L5 to meet the EN 207 specification. Cover any windows and viewing ports in the room while the device is in use.

2.3.5

Reflection Objects that reflect visible light will reflect treatment laser light. Avoid placing reflective materials such as glass, metal and polished plastic in the path of the laser beam.

All surfaces in the room should be matt finished to prevent possible reflection of the treatment laser. Avoid using reflective instruments.

2.3.6

Fire hazard Some materials (for example, cotton wool saturated with oxygen) may be ignited by the high temperatures produced by the treatment laser. Before using the device, allow the solutions of adhesives and

Safety

2.4

Safety interlock A safety interlock connection is provided for connection to a theatre or clinic door. When connected, if the door is opened: 

the treatment laser is immediately disabled, and the device is placed in STANDBY



a warning sounds



an interlock warning icon is displayed.

A separate fibre interlock detects the presence of an optical fibre connection. The treatment laser is disabled if an optical fibre is not connected.

2.5

Laser safety monitoring A hardware safety system monitors the power and safety functions of the device, and ensures that software failure does not affect the safety of the device.


3 Theory of operation

Theory of operation

Stimulated emission The laser beam is produced by the process of stimulated emission. During this process, atoms are excited above their ground state by an energy source (a flash lamp in the Tango, Solo and Ultra Q). When the excited atoms return to their ground state, they emit photons, which are reflected by mirrors back and forth through the laser medium within the laser cavity. When a photon hits an already excited atom in the laser medium, the atom emits another photon. This means that one photon enters and two leave, both in the same direction as that of the incoming photon, and both with exactly the same phase in relation to each other (coherent), and at the same wavelength.

Elements of a laser A laser has three major components: 

laser medium—a solid, liquid or gas, where the energy from the source is absorbed, and photons are emitted



energy source or pump—such as a flash lamp



resonant laser cavity—in which the photons are reflected back and forth, producing pulses of laser light.

Laser medium The laser (or lasing) medium is a solid-state crystal of neodymium-doped yttrium aluminium garnet (Nd:YAG).

Energy source (or pump)


The main discharge capacitor is a 64 µF (microfarad) 900 V pulsed type. The energy entering the flash lamp is proportional to the square of the capacitor voltage characteristic (as shown in the illustration below) which shows flash lamp voltage versus Nd:YAG energy output. It is important that when the laser is in operation, the voltage to the flash lamp must be set correctly to prevent the possibility of too few or too many pulses.

Flash Lamp Voltage vs Laser Energy Output General reference only 40

) 30 J m ( y r e g 20 n E r e s a L 10 Single Pulse 431

Triple Pulse

Double Pulse 493

544

Flash Lamp Voltage (V)

3.1.2

sm_tsu_0003

Medical advantages For medical use, the differences between laser light and other sources offer the following major advantages in their clinical applications: 

significantly higher power densities at the target tissue ability to match the wavelength to the absorption properties of the tissue of interest for a

Theory of operation

Photodisruptive effect The YAG laser is focussed to an 8 µm spot which produces a small ionisation site (plasma) at the focal point. The resulting plasma formation produces an acoustic wave that disrupts nearby tissue in a process known as the photodisruptive effect . The plasma absorbs and scatters further incident light, and this shields the underlying structures from damage. The beam divergence after the focal point also protects the retina from damage that could otherwise occur by the absorption of concentrated Nd:YAG treatment energy. As the treatment energy increases, the size of the plasma formed also increases, which causes a larger, stronger acoustic wave. To avoid the possibility of the plasma damaging the intraocular lens (IOL) by causing cracking, pitting or chipping, and to allow the accompanying shock wave to be most effective, the treatment beam may be offset further behind the membrane to be penetrated (posterior to the focal plane of the slit lamp, which is focused on the membrane). A posterior offset control allows selection of the amount of offset required. The energy of the laser pulse(s) is continuously adjustable and is normally set at the lowest possible effective level to minimise unwanted side effects.


3.1.4

Selective laser trabeculoplasty (SLT) The Tango and Solo have an SLT treatment beam (the Ultra Q has only the YAG treatment beam, but may be upgraded to include an SLT treatment beam). The SLT treatment beam is used to reduce intraocular pressure by selectively targeting the pigmented within the trabecular meshwork. A single visible red diode single spot laser is used to aim the treatment laser beam. The aiming beam is coaxial with the treatment beam and has a fixed focus. Laser pulses are accurately positioned using a coaxial aiming beam, and a gonioscopy contact lens, which is fitted to the patient’s eye. The 532 nm wavelength is absorbed more readily by the pigmented cells, causing them to be destroyed but leaving the trabecular support structure intact. The low power diode laser light is set to focus at the same plane as the slit lamp (parfocal with the slit lamp).

3.2

General device description The block diagrams below are provided to help you understand the main components of the device. They do not accurately indicate the exact layout.

3.2.1

Electrical block diagram This is an overview of the electrical connections between the major modules.

SLT DAM

YAG DAM

Theory of operation

3.2.2

Optical path block diagram The optical path includes the viewing, aiming beam and treatment beam paths. The aiming and treatment paths originate in, and exit from, the delivery head.

Binocular, magnification changer and eye safety filter

SLT folding mirror

YAG folding mirror

635 nm

635 nm

SLT DAM

YAG DAM

SLT attenuator (includes energy monitor, pulse detector and shutter)

Beam expanding telescope (posterior offset)

1064 nm

532 nm

KTP crystal

SLT Delivery Carriage

1064 nm

YAG attenuator (includes energy monitor, pulse detector and shutter)

1064 nm

Objective lens


3.2.5

Delivery head The laser system consists of a number of optical modules, which are mounted on a common set of precision machined and aligned rails mounted in the delivery head. This ensures accurate and repeatable positioning of the modules.

Common modules (Tango, Solo and Ultra Q) Trigger There are two low voltage inputs to the trigger module, both +5 V DC as well as the DC voltage from the YAG power supply (3 50-900 V DC). When one low voltage input is momentarily switch to ground, it drives the pulse transformer which converts the DC input ( 350-900 V DC) into a high voltage (12 kV) pulse. This high voltage pulse is delivered to the flash lamp anode and cathode connections via the thick wires connecting the trigger to the cavity.

YAG laser cavity The YAG laser body contains a flash lamp, to optically pump a solid-state crystal material made of neodymium, yttrium, aluminium and garnet (Nd:YAG). When the fire switch is pressed, the microprocessor sends a signal to the trigger module. This signal energises a pulse transformer inside the trigger module, which produces a 12 kV trigger pulse to the trigger connection of the flash lamp. This trigger pulse ionises gas inside the flash lamp, which causes the gas to electrically conduct (ionise). This ionised gas discharges the high voltage from the cathode to the anode, and the energy is released as a bright flash of light from the flash lamp.

Theory of operation

Fire control board The fire control board is mounted in the delivery head and: 

controls the shutter motor and monitors the shutter sensors



triggers the flash lamp



controls the energy delivered via each op tical pathway



controls the diode aiming beam intensity of each optical pathway



measures the energy of the treatment beam (energy detector is mounted on the attenuator)



measures the number of pulses delivered each shot (pulse detector is mounted on the attenuator)



stores all the calibration information and system specific parameters



monitors external interlocks



selects joystick or footswitch activated delivery of the treatment beam



allows entry into Engineering mode.

The fire control board communicates with the rest of the system via an RS485 communication bus.

YAG specific modules (Tango and Ultra Q) Beam expanding telescope (BET) The YAG beam expanding telescope is an optical module that comprises positive and negative lenses, and an optic wedge. It accepts the 3 mm diameter laser beam from the YAG cavity and expands it to approximately 27 mm in diameter.


Diode aiming module (DAM) The separate YAG diode aiming module consists of a diode laser, beam monitor, collimator lens and associated circuitry. The laser diode is powered by +8 V from the board on the attenuator module. The diode emits a 635 nm red laser beam, which is expanded to increase the diameter to 7 mm. The final focus of the aiming beams is accomplished by adjusting the position of the laser relative to the top lens of the YAG BET. Circuitry on the attenuator board regulates the current to the laser diode, monitors the output of the laser diode to control its output. The output intensity is controlled by the fire control board, which reads the value of the aiming beam intensity control potentiometer positioned on the slit lamp base, and pulse width modulates the output of the laser from approximately 10% to 100%, according to the control position.

Attenuator, shutter and energy monitor

r t e t i l s p a m B e

P o l a r

r t e t i l s p m e a B

Theory of operation

SLT specific modules (Tango and Solo) SLT DAM This is similar to the YAG DAM. The beam is expanded to a diameter of 3 mm.

SLT Attenuator to SLT folding mirror

Energy meter

B e a m s p l i t t e r

Shutter

B e a m s p l i t t e r

P o l a r i s e r Optic halfwave plate 532 nm from KTP crystal

SLT Attenuator sm_tsu_0083b

This is similar to the YAG attenuator. There is no beam switch and the treatment beam output is


If the YAG PSU control circuit detects a fault, the ‘LASER ON/OFF’ line goes high, shutting the YAG power supply down, and the ‘RESET I/P’ line goes high. This causes the storage capacitors C13 and C27 to be discharged through the dump/reset circuit. When the fire switch is pressed, the complex programmable logic device (CPLD) on the fire control board sends a signal to the trigger module, and the YAG laser is triggered to fire. This causes the main storage capacitor (C13 and C27) to discharge across the flash lamp and to immediately charge up again. The ‘FIRE DETECT’ section of the power supply detects when the capacitor is charged. When the storage capacitors are charged to the correct voltage, the ‘YAG PSU READY’ line goes low, indicating that the YAG power supply is ready to be fired again.

DC power supply The DC PSU is a medical grade switch-mode power supply that converts AC mains to the low DC voltages to operate the rest of the system. The switched mode power supply module provides 15 V DC to the system. This module accepts a mains input voltage in the range of 90 to 264 V AC.

3.2.7

Start up sequence When the key is turned to On and the Laser On/Off switch is pressed (On), the following self tests and initialisations occur: 1

The LCD is turned on and displays a welcome message and system version number for two seconds.

2

The system is set to single pulse mode (YAG treatment laser in Tango and Ultra Q, or

Theory of operation

If the operator changes any of these controls, the microprocessor detects the change and responds accordingly. The aiming laser detector signal is a status signal, which is not controlled by the operator. It is a safety feature to ensure the treatment laser cannot be fired if the aiming laser is not operational.

3.2.8

Firing sequence After the start up sequence is completed and all conditions are met, READY status must be selected to enable firing. The laser is fired by pressing the fire switch on the joystick or pressing the footswitch (if attached). Whenever an attempt is made to fire, the following processes occur: 1

The microprocessor reads READY status is selected.

2

The microprocessor reads the fire instruction.

3

The microprocessor sends a fire signal to the trigger module.

4

The shutter motor opens the shutter.

5

Two sensors inside the SLT or YAG attenuator module (as selected) detect the shutter position. If the shutter malfunctions, the microprocessor shuts down the power supply, disables the unit and displays an error.

6

The trigger pulse is generated once the safety shutter is detected to be in the open position.

7

The flash lamp converts the energy in the storage capacitor into a flash of light.

8

This flash in turn energises the laser rod.


4 Alignment

Alignment

4.2

Standard alignment procedure workflow

4.2.1

Main flowchart START ALIGNMENT

Task 4.3.1

Check

Focus the eyepieces

Choice Predefined process 4.3.1

Reference

4.3.2 Set centre of rotation (COR) (adjust slit position if required)

4.3.3 Background in focus?

Yes

Perform YAG alignment

Tango & Ultra Q

Solo

No

Set background focus


4.2.2

YAG alignment path flowchart START YAG ALIGNMENT

4.3.4 YAG burn aligned to slits?

No

Adjust YAG burn to slits

No

Focus the aiming beams

No

Adjust DAM polarisation (recheck focus)

No

Centre the aiming beams to the YAG burn

Yes

4.3.4 YAG aiming beams in focus?

Yes

4.3.5 Aiming beams the same intensity?

Yes

4.3.6 YAG aiming beams centred on the burn?

Yes

Alignment

4.2.3

SLT alignment path flowchart START SLT ALIGNMENT

Tango

Solo

4.3.8 SLT aiming beam centred on YAG burn?

4.3.8 No

SLT aiming beam centred on the slits?

Align aiming beam to the YAG burn

No

Yes Yes

4.3.9

Task Check Choice 4.3.8

SLT treatment beam centred on SLT aiming beam?

No

Align treatment beam

No

Focus aiming beam

Yes

Reference 4.3.10 SLT aiming beam the correct size?

Align aiming beam to both the horizontal and vertical slits


4.3

Standard alignment procedure

4.3.1

Focussing the eyepieces To focus the eyepieces 1

Ensure that both eyepieces are pushed all the way in.

2

Look into the right ocular with your left eye.

3

Adjust the ocular until the crosshairs are in focus. The crosshairs are also known as a reticule.

4

Adjust the left ocular to the right ocular setting.

5

Look into the right ocular with your right eye.

6

Adjust the ocular until the crosshairs are in focus.

7

When the crosshairs are in focus: o

4.3.2

Go to 4.3.2 Setting the centre of rotation (COR) on page 35.

Setting the centre of rotation (COR) To check the centre of rotation 1

Turn the device on.

Alignment

To centre slit movement 1

Loosen the two prism locking screws on t he illumination tower. Do not push the prism down: keep it level.

2

Rotate the prism until the slit position stays in the centre when you swing the tower. For example, if the slit swings to the right slightly turn the prism to the left.

3

Repeat this process until the slit swings equally from side to side.

4

Tighten the two prism locking screws.


To set background focus Avoid touching the surface of the objective lens. 1

Remove the inserts covering the two top objective lens screws.

sm_tsu_0013

2

Loosen the two top screws enough to allow the lens to rotate freely.

3

Rotate the lens to bring the target into focus.

4

Tighten the screws.

5

Check the focus at 28x and 10x magnifications. Replace the magnification changer if focus cannot be achieved within ±1 dioptre (i.e. one adjustment of the ocular either way). When the background is in focus:

Alignment

4.3.4

Aligning the YAG laser To check YAG burn and DAM alignment 1

Adjust the slit width to full circle illumination and low intensity.

2

Ensure that the illumination tower is swung to one side, so it does not obstruct the aiming beam.

3

(Tango) Select YAG mode.

4

Select READY.

5

Set energy to minimum.

6

Look through the binocular and fire the laser. If the aiming beams are not centred to the burn: o

Record this fact for later use (in procedure 4.3.6 Centring aiming beams to the burn (YAG DAM) on page 42 ).

If the burn is aligned to the slits (that is, the burn is within three aiming beam diameters of the slits), and the aiming beams are focussed: o

Go to 4.3.5 Adjusting YAG diode aiming module polarisation (YAG DAM) on page 41.

If the burn is not aligned to the slits: o

Adjust the burn to the slits (see below).

If the aiming beams are not focussed:


To adjust the burn to the slits Avoid touching the surface of the objective lens. Do not rotate the lens during this procedure. 1

Remove the inserts covering the three objective lens screws.

2

Adjust the objective lens by tightening or loosening the three set screws. The goal is to place the burn within three aiming beam diameters of the slits.

3

When the burn is aligned to t he slits: Focus the aiming beams if necessary (see below).

Alignment

9

Loosen the DAM clamping screw.

YAG DAM Diode sm_tsu_0016

10

While observing the aiming spots through the binocular, move the YAG DAM diode upwards.

11

While observing through the binocular gently move the DAM assembly down until the aiming spots are at their smallest.

12

Tighten the DAM clamping screw.


4.3.5

Adjusting YAG diode aiming module polarisation (YAG DAM) Adjust DAM polarisation if one of the aiming beams is considerably brighter than the other aiming beam.

To check DAM polarisation 1

Place a calibrated power meter (635 nm) in front of the objective lens (as for DAM calibration).

2

Set the aiming beam intensity to maximum.

3

Block one of the aiming beams just after the objective lens with opaque material, and record the energy of the single beam.

4

Repeat the process for the other aiming beam. If the difference in intensity between aiming beams is < 5 µW: o

Go to 4.3.6 Centring aiming beams to the burn (YAG DAM) on page 42.

If the difference in intensity between the aiming beams is > 5 µW: o

Adjust DAM polarisation (see below).

To adjust DAM polarisation 1

Attach the alignment jig to the delivery head.

2

Use the burn paper side of the target plate to see the aiming beams.

Alignment

4.3.6

Centring aiming beams to the burn (YAG DAM) If the aiming beams are centred to the burn (refer to your results from 4.3.4 Aligning the YAG laser on page 38 ): o

Go to 4.3.7 Adjusting posterior offset on page 43.

If the aiming beams are not centred: o

Centre the aiming beams (see below).

To centre the aiming beams 1

Access the delivery head (refer to 7.5.1 Delivery head modules on page 93 ).

2


3

Adjust the lower mirror arm (‘B’ in the illustration below) on the YAG folding mirror to centre the lower aiming beam on the laser burn.

C (Horizontal) D (Vertical) A (Vertical)

B (Horizontal)


4.3.7

Adjusting posterior offset The YAG treatment beam is focussed slightly posterior to the focal plane. Use a model eye, or the alignment jig, to check and adjust posterior offset.

Using the model eye In this approach, posterior offset is first checked and then adjusted.

To check the posterior offset 1

Remove the alignment jig.

2

Insert a new membrane in the model eye, and fill the model eye with water. A new model eye membrane must be used as membranes harden over time, after which they do not provide consistent results.

3

Attach the model eye to the chin rest. Ensure that the model eye is perpendicular to the optical path.

4

Turn the device on.

5

Select READY.

6

Set energy to 1.5 mJ (single pulse).

7

Set posterior offset to MIN.

8

Move the slit lamp to focus the aiming beams to one spot on the membrane of the

Alignment

To adjust the posterior offset 1

Set posterior offset to +150.

2

(Tango) Remove the top right fire control board screw, and swing the board out.

3

(Tango) Remove the two screws, and detach the KTP crystal cover. This provides access to the beam expanding telescope.

sm_tsu_0018

4

Loosen the posterior offset locking screw on the beam expanding telescope (BET).


Using the alignment jig Posterior offset is adjusted and not checked in this approach.

To adjust the posterior offset 1

Attach the alignment jig to the delivery head. Each division on the clear plastic dial represents 20 µm. A small metal pin is used as a reference point.

1 division = 20 µm

sm_tsu_0020a

Alignment

8

Set energy to minimum (single pulse).

9


10

(Tango) Remove the top right fire control board screw, and swing the board out.

11

(Tango) Remove the two screws, and detach the KTP crystal cover. This provides access to the beam expanding telescope. Refer to the illustration in the offset instructions for the model eye.

12

Locate the posterior offset locking screw on the beam expanding telescope (BET). Refer to the illustration in the offset instructions for the model eye.

13

Fire the laser.

14

Repeatedly move the target to a clear area, adjust and lock the starwheel, and fire the


4

Turn the dial five divisions clockwise. This moves the target 100 µm backwards (the MIN position).

1 0 0 µ m

µ m 6 0

2 0 µ m

Alignment

11

Set posterior offset to MIN.

12

Aim to the right of spot 1, and fire the laser (spot 4).

13


14

Aim below the previous spot, and fire the laser (spot 5).

15


16


17

Turn the dial five divisions clockwise. This moves the target another 100 µm backwards to 350 µm.


22


23


24

Your burn pattern should match that illustrated in the table below. If your pattern is different, you did not achieve the smallest burn spot size at the start, and you must start again.

Min







+150







+250







25

When the posterior offset is correct: o o

Ultra Q—Reassemble the device then go to 4.3.11 Aligning the slits on page 54. Tango—Go to 4.3.8 Aligning the SLT aiming beam (SLT DAM) on page 50.

Alignment

4.3.8

Aligning the SLT aiming beam (SLT DAM) Tango To check the aiming beam 1


2

Use the burn paper side of the target plate.

3

Set the target at the centre of rotation.

4

Turn the device on.

5

Select YAG mode.

6


7

Select READY.

8

Look through the binocular, and fire the laser at a clear part of the burn paper.

9

Select SLT mode.

10

Select READY.

11

Check the position of the aiming beam against the YAG burn mark. If the aiming beam is centred on the burn mark: o

Go to 4.3.9 Centring the SLT treatment beam on page 52.


Solo To check the aiming beam 1


2

Use the burn paper side of the target plate to see the aiming beam.

3

Set the target to the centre of rotation.

4

Turn the device on.

5


6

Select READY.

7

Look through the binocular, and fire the laser.

8

Check the position of the aiming beam against the slit (horizontal and vertical). If the aiming beam is centred on the slits: o

Go to 4.3.9 Centring the SLT treatment beam on page 52.

If the aiming beam is not centred on the slits: o

Align the aiming beam to the slits (see below).

To align the aiming beam to the slits 1


2

Adjust the three SLT DAM adjustment screws on the SLT folding mirror to align the aiming beam to the horizontal and vertical slits (see the illustration for the Tango

Alignment

4.3.9

Centring the SLT treatment beam To check the SLT treatment beam 1


2

Select READY.

3

Aim and fire the laser. If the treatment beam is on top of the aiming beam: o

Go to 4.3.10 Focussing the SLT aiming beam (SLT DAM) on page 53.

If the treatment beam is not on top of the aiming beam: o

Adjust the SLT treatment beam (see below).

To adjust the SLT treatment beam 1

Adjust the three folding mirror screws to align the beam to the aiming beam.


4.3.10 Focussing the SLT aiming beam (SLT DAM) Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information.

To check the focus of the SLT aiming beam 1


2

Select READY.

3

Fire the laser.

4

Look through the binocular, and compare the size of t he aiming beam to the burn. If the aiming beam is the same size as, or slightly larger than the burn mark: o

Go to 4.3.11 Aligning the slits on page 54.

If the aiming beam is too large or too small: o

Focus the SLT aiming beam (see below).

To focus the SLT aiming beam 1

Loosen the clamping screw.

Alignment

4.3.11 Aligning the slits This is the final alignment step for the Tango, Solo and Ultra Q. Note that you can only see one slit at a time.

To check the slits 1

Turn the device on.

2

Set the slit to horizontal.

3

Set the magnification to 16x.

4

Look through the binocular, and check the slit. It should match the illustration below.

5

Repeat this process with the vertical slit. It should match the illustration below.


To align the slits 1

Adjust the set screws on the front and rear faces of the magnification changer (four screws: two per face) and the set screws on the rear face of the binocular (two screws) until alignment is achieved. The two magnification changer set screws that face the delivery head make major changes to the alignment; the other four set screws (on t he other face of the magnification changer and the binocular) allow you to make minor changes. Magnification Changer

Binoculars

Delivery Head

Top

Side

A

B

A

B

Alignment

4.4

Other alignment procedures Follow these procedures only if directed by Ellex Global Service staff, or by an instruction elsewhere in this manual. These instructions are not part of the standard alignment procedure.

4.4.1

Aligning the SLT steering mirror (far field alignment) You must wear OD2 532 nm safety glasses during this process (to safely view the beam). Do not fire the laser more than once a second in SLT mode.

This procedure only applies to the Tango and Solo.

To check steering mirror alignment 1

Turn the device on.

2

Position the device approximately 1.5 m from a wall or screen.

3


4

Remove the top right screw of the fire control board, and swing the board out.

5

Select Engineering mode (refer to 6.1.2 Engineering mode on page 72 ).

6

Select SLT mode.

7



5

Calibration

Calibration

5.2

Standard calibration procedure flowchart START CALIBRATION

Task

5.4.1

Check

Voltage window test

Choice 5.4.1

Reference Tango & Ultra Q

YAG Path

Solo

5.4.2 Calibrate YAG DAM

Calibrate SLT DAM

5.4.3 Calibrate YAG energy monitor

No

YAG test fire within tolerance?

Yes

5.4.6 Calibrate SLT energy monitor

5.4.4 Adjust YAG energy prediction

SLT Path

5.4.5

5.4.7 SLT test fire within tolerance?

No

Adjust SLT energy prediction


5.3

Energy definitions Energy is defined as: 

predicted (or set)



internal



delivered.

Predicted (or Set)

The value that you set using the energy control on the delivery head. This value displays temporarily on the remote control. The product specifications detail the energy levels and increments available. When you change the energy, the device test fires the laser.

Internal

The energy of the test fire as measured by the device’s internal energy meter. This value replaces the predicted (set) value that displayed temporarily on the remote control.

Delivered

The energy delivered to the target, as measured with an external energy meter

Minor variations between energy levels are normal and expected.

Predicted/Set Energy

Internal Energy

Delivered Energy

TEST FIRE

TREATMENT FIRE

Calibration

5.4

Standard calibration procedure

5.4.1

Voltage window test The device fires the laser at various voltages to determine the optimal operating voltages of the laser cavity for single, double and triple pulse modes.

To perform the voltage window test 1

Turn the device on.

2


3

Enter Service or Engineering mode (refer to 6.1 Service and Engineering modes on page 71 ).

4

Use the energy control on the delivery head to highlight VOLTAGE WINDOW.

5

Press  to start the test.


5.4.2

YAG diode aiming module (YAG DAM) To calibrate the YAG DAM 1

Swing the illumination tower to one side.

2


3

Place a calibrated power meter (635 nm) in front of the objective lens. Ensure that the aiming beams focus to one spot on the detector head.

4

Set aiming beam intensity to maximum.

5

Ensure that the device is in Service or Engineering mode.

6

Use the energy control on the delivery head to highlight DAM CALIBRATION.

7

Press  to start the test. This test cannot be paused. To cancel the test, press the State button twice. The latest software displays the previously set DAC value instead of 0 as shown below.

sm_tsu_0084a

YAG DAM SETTING YAG DAC VALUE

0

Calibration

5.4.3

YAG energy monitor To calibrate the YAG energy monitor 1

Mount a calibrated energy meter (1064 nm) in front of the objective lens. Ensure that the face of the energy detector is anterior to the focal point (aiming beams should be 10 to 15 mm apart).

2

Set the external energy meter to average recordings over 10 shots in the range of 10 to 15 mJ.

3


4

Ensure that the device is in Engineering mode. If you attempt this task in Service mode, the remote will display FAILED 8205 CPLD.

5

Use the energy control on the delivery head to highlight ENERGY MONITOR.

6

Press  to start the test. Restart the device at any time to abandon the test.

YAG ENERGY MON YAG ENERGY

0

YAG

0

1

0.30

SBY

470

1

0.37


5.4.4

YAG energy prediction To check YAG energy prediction 1


2

Select single pulse.

3

Adjust the energy control on the delivery head to maximum, and record the predicted energy.

4

Record the internal energy delivered by the test fire.

5

Repeat this test for several energy settings from minimum to maximum. If the internal energy for each test fire is within ±30% of the predicted energy: o o

Ultra Q—You have completed the standard calibration procedure. Tango—Go to 5.4.5 SLT diode aiming module (SLT DAM) on page 64.

If the internal energy of the test fires is not within ±30% of the predicted energy: o

Adjust YAG energy prediction (see below).

To adjust YAG energy prediction 1

Adjust the energy control on the delivery head to 1 mJ.

2


3

Repeat this test several times to confirm the internal energy level at the predicted/set value of 1 mJ.

Calibration

5.4.5

SLT diode aiming module (SLT DAM) To calibrate the SLT DAM 1

Ensure the device is turned on.

2

(Tango) Select SLT mode.

3


4

Place a calibrated power meter (635 nm) in front of the objective lens.

5

Set aiming beam intensity to maximum.

6

Centre the aiming beam on the detector head aperture.

7

Enter Service or Engineering mode (refer to 6.1 Service and Engineering modes on page 71 ).

8

Use the energy control on the delivery head to highlight DAM CALIBRATION.

9

Press  to start the test. The latest software displays the previously set DAC value instead of 0 as shown below.

SLT DAM SETTING SLT DAC VALUE SLT

0

1

0 0.30


5.4.6

SLT energy monitor To calibrate the SLT energy monitor 1

Mount a calibrated energy meter (532 nm) that can measure from 0.3 mJ to 10.0 mJ, in front of the objective lens. Ensure that the SLT aiming beam is 8 to 10 mm in diameter in the detector.

2

Set the external energy meter to average recordings over 10 shots in the range of 10.0 mJ.

3

(Tango) Ensure that the device is in SLT mode.

4

Ensure that the device is in Engineering mode. If you attempt this task in Service mode, the remote will display FAILED 8205 CPLD.

5

Use the energy control on the delivery head to highlight ENERGY MONITOR.

6

Press  to start the test. Restart the device at any time to abandon the test.

SLT ENERGY MON SLT ENERGY

0

SLT

0

1

0.30

SBY

470

1

0.37

Calibration

5.4.7

SLT energy prediction To check SLT energy prediction 1


2

Select single pulse.

3

Adjust the energy control on the delivery head to maximum, and record the predicted energy.

4


5

Repeat this test for several energy settings from minimum to maximum. If the internal energy of the test fires is within ±30% of the predicted energy: o

You have completed the standard calibration procedure.

If the internal energy of the test fires is not within ±30% of the predicted energy: o

Adjust SLT energy prediction (see below).

To adjust SLT energy prediction 1

Adjust the energy control on the delivery head to 1 mJ.

2


3

Repeat this test at 1 mJ several times to confirm test fire energy level.

4

Enter Engineering mode (refer to 6.1.2 Engineering mode on page 72 ).

5

Use the energy control on the delivery head to highlight VIEW CONSTANTS.


5.5

Other calibration procedures Follow these procedures only if directed by Ellex Service personnel, or by an instruction elsewhere within this manual. These instructions are not part of the standard calibration procedure.

5.5.1

KTP crystal energy Align the KTP crystal if energy deviation warnings occur for more than 15% of shots. This procedure only applies to the Tango and Solo.

To check the KTP crystal 1

Turn the device off and turn mains power off.

2


3

(Tango) Remove the top right screw of the fire control board, and swing the board out.

4

Remove the two screws and detach the KTP cover plate.

Calibration

6

Clean the crystal if it is dirty. Moisten lint free optical tissue with pure or AR grade ethanol (or methanol), and gently wipe the tissue or swab across the optical surface in a linear stroke. Repeat with a new tissue until the surface is clean.

7

Reattach the crystal.

8

Turn mains power on and start the device.

9

Place an energy meter in front of the objective lens. Ensure that the aiming beam is 8 to 10 mm in diameter on the energy meter detector.

10


11

Enter Engineering mode (refer to 6.1.2 Engineering mode on page 72 ).

12

Use the arrow buttons (<<< and >>>) to jump to the information fields on the menu.

13

Use the arrow buttons to highlight SBY.


To adjust the KTP crystal 1

Remain in Engineering mode.

2

Slightly adjust the front KTP crystal screw (A) to maximise output, then adjust the other two screws (B and C).

Calibration


6 Troubleshooting

Troubleshooting

To exit Service mode

6.1.2

1

Press the State button for five seconds to display the Operator menu.

2

Press the State button once t o return to the Main display.

Engineering mode This mode overrides the device’s safety features.

To enter Engineering mode 1

Turn the device off

2


3

Reattach the safety filter, magnification changer and binocular, but leave the delivery head front cover off.

4

Turn the device on.

5

After the device has started up, press the SW ENG button on the fire control board.

T E S E R

RESET


6.1.3

Display

1

Menu options

2

Information fields

3

Navigation controls

Menu options Menus are the same in Service and Engineering modes however, the calibration options do not work in Service mode. DAM CALIBRATION

Calibrate the diode aiming module(s)

ENERGY CURVE

Determines the energy curve characteristics of the device.

ENERGY MONITOR

Calibrates the internal energy monitor

VOLTAGE WINDOW

Determine the laser operating voltages

Troubleshooting

Navigating menus Menus and fields are accessed using the remote control button, and the energy control on the delivery head. A flashing number indicates that the value may be changed. A black rectangle indicates the field or value may be selected. The energy control on the delivery head changes the contents of highlighted (flashing) fields, and also scrolls through menu options.

1

<<<

Left arrow. Move left. Move the cursor or highlight back to the previous field.


6.1.4

Menu options DAM calibration This determines the feedback level used to control the DAM current in order to provide sufficient brightness without damaging the laser diode.

YAG DAM SETTING YAG DAC VALUE

0

YAG

0

1

0.30

SBY

470

1

0.37

sm_tsu_0032b

Energy curve Do not use. Manually set YAG zero and SLT zero (refer to 5.4.4 YAG energy prediction on page 63 and 5.4.7 SLT energy prediction on page 66 respectively). This option automatically determines the minimum and maximum energy values for attenuator rotation (between 1% and 99%). H owever, this process takes 40+ minutes per mode to complete and is unreliable for unstable cavities.

Troubleshooting

Voltage window This determines the actual voltage required to generate single, double and triple pulse laser fires.

Serial number SERIAL NUMBER 0354-8972-8872-1124 VER C04 D01 M01 P03 YAG

0

1

0.30

SBY

470

1

0.37

sm_tsu_0032l


View constants VIEW CONSTANTS YAG DAM

320

SLT DAM

1022

YAG

0

1

0.30

SBY

470

1

0.37

sm_tsu_0032n

To change a constant 1

Use the energy control to highlight the constant.

2

Press  to display EDIT CONSTANTS. The value flashes.

3

Use the energy control to change the value. Press the State button to return to VIEW CONSTANTS without changing the original value.

sm_tsu_0084a

4

Press  to store the new value, and return to VIEW CONSTANTS.

YAG DAM

DAM operating point

SLT DAM

DAM operating point

Troubleshooting

6.2

Error codes You can enter Engineering mode when an error is displayed (refer to 6.1.2 Engineering mode on page 72 ).

0000

CRC checksum failure of EEPROM memory on start up

0400

YAG PSU controller error. Unable to establish communications with the YAG PSU controller on start up.

8107

Unable to find half wave plate minimum

8108

Voltage window determination error. Single pulse voltage exceeded 600 V.

8109

Voltage window determination error. Single pulse voltage exceeded 899 V.

8205

A calibration task was attempted while the device was in Service mode (use Engineering mode instead).

E04-Y or S

Over-pulse error. Energy calibration is out of tolerance.

E05-Y or S

Closed shutter detector error. The closed sensor indicates the shutter is not fully closed.

E06-Y or S

Open shutter detector error. The open sensor indicates that the shutter is not fully open.

E07-Y or S

Aiming laser malfunction

E10-Y or S

Pulse detector failure. Energy was detected without pulses.

E11-Y or S

Energy monitor failure. Pulses where detected without energy.

E12-Y or S

Excess energy monitor. The delivered energy is more than double the last test fire energy.

E13

Laser timeout error. The internal CPLD timed out waiting for the shutter to move.

E20

Unexpected pulse detected. Pulses were detected outside of the laser fire authorisation window.

E30-F or E30-J

Laser fire controller error (F = footswitch, J = joystick)


x900

6.3

9

SLT single pulse

A

SLT single pulse

B

SLT single pulse

C

SLT single pulse

0

Memory

1

SLT shutter

2

SLT single pulse

3

SLT single pulse

4

SLT single pulse

5

SLT single pulse

Over-pulse detection error on start up. The x prefix is as for the x800 code (see above).

Error messages This symbol means that you will also hear an audible warning.

START FAILED

Example start failed error

CODE: x800 UNDER PULSE

SYSTEM ERROR

Example system error

CODE: E04-x OVER PULSE

Checksum failure of EEPROM.

Troubleshooting

0.3 12

1

6.4

mJ

1

TOTAL 3.60 mJ

0 SLT sm_tsu_0081b

SLT Energy deviation (flashing down arrow), Energy less than 18% of internal en ergy. The audible alert only occurs when the weighted moving average (0.7 x current energy value + 0.3 x previous average value) of treatment laser fires deviates by more than ±18%.

Energy warnings and errors The conditions for which energy warnings and errors are raised are illustrated below.


6.5

Cavity performance Laser cavities slowly degrade over time. The following tasks help you to determine the overall health of the laser. Contact Ellex Global Service with your test results for a second opinion and further guidance if necessary. START CAVITY CHECK

Task 6.5.1

Choice 6.5.1

Check burn pattern

Reference Predefined process

6.5.2 Check energy stabilty

Tango & Ultra Q

6.5.3 Perform air Breakdown test

6.5.3

Solo

Troubleshooting

6.5.2

Energy stability checks To check the energy stability 1

Turn the device on.

2


3

Set energy to the first step (see table below).

4

Set single pulse.

5

Set duration to 1 s interval.

6

Select READY.

7

Fire 25 shots into the air.

8

Record the number of energy deviation warnings on the PAF.

9

Repeat this sequence for the other three steps, waiting 10 s between changing the energy setting before commencing firing.

10

(Tango) Select SLT mode and repeat the stability check for the SLT path.

11

Review the number of energy deviation warnings. If ≤ 15 energy deviation warnings were recorded: o

Laser cavity is within tolerance.

If > 15 energy deviation warnings were recorded:


6.5.3

Air breakdown test This test only applies to the Tango and Ultra Q. Perform this test in environments with between 30% and 85% relative humidity (non-condensing). A false (high) air breakdown energy value will result if you attempt this test where humidity is < 30%.

To perform an air breakdown test Wear safety glasses during this test.

1

Remove all objects from the path of the laser (for example, model eye, alignment jig).

2

Clean the objective lens if it is dirty.

3

Turn the device on.

4

Set energy to 3.0 mJ ±0.2 mJ.

5

Select single pulse mode.

6

Fire the laser into the air, at three to four second intervals, while increasing the energy until you see a visible spark and (usually) hear a distinctive audible ‘crack’ sound. The spark and sound indicates air breakdown.

7

Slightly increase or decrease energy until at least five out of 10 shots causes air breakdown.

8

Place a calibrated energy meter detector on the chinrest.

Troubleshooting


7

Replacement instructions


7.2

Electro-static safety procedures Where noted in this manual, use an electro-static discharge (ESD) wrist strap connected to an earth when working on these devices. Alternatively, earth yourself to the key inserted into the keyswitch. Where possible, keep the mains power cord connected (and mains power turned off) when working on the device. A connected power cord completes the earth circuit for t he earth point on the device (shown below) and key.

7.3

Device reassembly The phrase “reassemble the device” means that you should follow the reverse of the procedure that you followed to take the device apart.

7.4

Module identification This device comprises a number of major components (refer to the illustration below): 

‘Slit lamp’ (highlighted with black lines and indentified by ‘A’) includes the binocular,


7.4.1

Delivery head

Solo


Tango


1

Binocular

2

Magnification changer

3

Safety filter

4

Fire control board


Ultra Q

sm_tsu_0064


Modules that are shared between the three devices are indicated below.

7.4.2

Laser cavity







Trigger







DC power supply







YAG power supply







Beam expander (BET)

N/A





YAG diode aiming module (YAG DAM)

N/A





YAG folding mirror

N/A





SLT diode aiming module (SLT DAM)





N/A

SLT delivery carriage

Includes KTP crystal and SLT folding mirror

Includes KTP crystal and SLT folding mirror

N/A

Console The same console is used for the all three devices.


7.4.3

Other items


7.5

How to access modules

7.5.1

Delivery head modules To access delivery head modules 1


2

Use the thumbscrews to remove the binocular and magnification changer.

3

Remove the four screws, and detach the safety filter.

sm_tsu_0067

4

Turn the joystick clockwise to raise the delivery head to its highest position.

5

Detach the delivery head cover by removing the securing screw located on its bottom edge (using the special 2 mm Allen key in the toolkit) and pulling the cover off.


7.5.2

SLT delivery carriage This procedure only applies to the Solo and Tango.

To remove the SLT delivery carriage Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information.

1

Access the delivery head modules (refer to 7.5.1 Delivery head modules on page 93 ).

2

Remove the top right screw from the fire control board.

3

Remove the four screws, and gently remove the carriage and lay it down on the table. Take care not to stress cable X37 (trigger cable) (this is the shortest cable).


To disconnect the SLT delivery carriage 1

(Optional) Remove the SLT delivery carriage (see above).

2

Disconnect the following cables from the carriage: o

X1 (terminating at the YAG attenuator)

o

X3 (terminating at the delivery head)

o

X4 (terminating at the delivery head)

o

X7 (terminating at the energy control)

o

X37 (terminating at the trigger).

To install the SLT delivery carriage 1

Turn the set screw counter-clockwise so that it does not protrude from the rear of the carriage (refer to the previous illustration for screw locations).

2

Fit the carriage to the delivery head, and hold it in place with your hand. Push the safety arm of the YAG attenuator slightly to the left as you place the carriage (refer to the previous illustration).

3

Loosely tighten the 4 screws and washers to secure the carriage.

4

Gently push the carriage downwards to correctly seat the carriage in the delivery head.

5

Tighten three carriage screws in the order shown below (do not tighten the bottom left screw at this time).


7.5.3

Console modules To access the console 1

Remove the delivery head and slit lamp (refer to 7.6.1 Delivery head on page 97 ).

2

Ensure that mains power to the device has been t urned off.

3

Remove the drawer.

4

Remove the two rear console side screws, and lower the rear flap.

5

Remove two screws on the left and right sides of the console (right side only shown below).


7.6

How to remove the delivery head and slit lamp

7.6.1

Delivery head To remove the delivery head and slit lamp 1


2

Disconnect and remove the remote control, footswitch and chinrest.

3

Remove the table extensions (if present).

4

Remove the two rear console side screws, and lower the rear flap.

5

Disconnect X43 and X45.

6

Lock the delivery head and slit lamp clamping screws and cross-slide clamps.

7

Remove the gearwheel covers.

8

Remove the delivery head and slit lamp assembly from the t abletop, and place it on a table. Support the assembly to avoid crushing X43 and X45 cables.

To reassemble the delivery head and slit lamp assembly 

Follow the reverse of the delivery head and slit lamp removal instructions.


7.6.2

Slit lamp To remove the slit lamp illumination tower from the delivery head 1

If the delivery head and slit lamp are still attached to the console, turn the device off and turn mains power off.

2

Remove the three screws, and detach the illumination cover plate. Do not lose the t hree small spacers located between the cover plate and the housing (two only shown in red below). These spacers assist tower ventilation.

3

Disconnect the illumination cable inside the tower.


7.7 Attenuator (SLT) Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information. 

This procedure only applies to the Solo and Tango.

Procedure 1


2

Disconnect X16 from the SLT attenuator. Pull the locking flap down your finger, and pull the cable out.

3

Disconnect the X13 from the attenuator.

4

Connect a shorting plug to X13 to protect the SLT DAM.

5

Remove the three screws, and detach the SLT attenuator.


7.8 Attenuator (YAG) Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 86 for for more information. 

This procedure only applies applies to the Tango and Ultra Q.



The YAG energy monitor monitor is part of the attenuator.

Procedure 1

Access the delivery delivery head (refer to 7.5.1 Delivery head modules on page 93 ).

2

(Tango) Remove the SLT delivery carriage (refer to 7.5.2 SLT delivery carriage on page 94 ).

3

Disconnect X13 and X16 from the YAG attenuator.

4

Connect a shorting plug to X13 to protect the YAG DAM.

5

Remove the three screws and washers, and detach the attenuator.


8

(Tango) On the fire control board, push switch 1 of the 8-way DIP switch up (ON). This restricts calibration calibration tests to the YAG path only. only. The DIP switch is located near near the SW ENG button.

T E S E R

G N E W S

sm_tsu_0035b


7.9

Beam expanding telescope (BET) Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 86 for for more information. 

This procedure only applies applies to the Tango and Ultra Q.

Procedure 1

Access the delivery delivery head (refer to 7.5.1 Delivery head modules on page 93 ).

2


3

Disconnect the X13 DAM cable from the YAG attenuator using the connector extraction tool.

4

Remove the three screws, and remove the DAM from the delivery head (refer to the illustration in 7.11

5

Connect a shorting plug to X13 to protect the YAG DAM.

6

Remove the three screws, and detach the BET from the delivery head.


7.10 Delivery head cable Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 86 for for more information. 

As you remove the cables, observe how the wiring wiring is positioned within the delivery delivery head and slit lamp base. You will need to recreate this layout when you insert the replacement cable.



This complex procedure procedure is split into two parts: o

How to remove the delivery head cable.

o

How to install the delivery head cable.

Procedure to remove the delivery head cable 1

Remove the delivery head and slit lamp from the console (refer to 7.6.1 Delivery head on page 97 ).

2

Remove the slit lamp illumination tower from the delivery head (refer to 7.6.2 Slit lamp on page 98 ).

3

Rotate the joystick clockwise to raise the delivery head as high as possible.

4

Detach the aiming beam and slit lamp d immer controls. For older devices: o

removing the knob cap


13

Turn the assembly on its side, side, and remove the four four screws that secure the lower slit lamp base cover.

14

Turn the assembly upright, upright, and remove the lower lower slit lamp base cover.

15

Disconnect the following cables from the slit lamp base: o

X22 (two cables)

o

X47 (cut and remove the cable cable tie)

o

X56 (cut and remove the cable cable tie).

16

Place the delivery head on its side.

17

Remove the cable tie that secures X43 and X45 to the cable clamp on the slit lamp base.


X3

Fire control board

X4

Fire control board

X18

Interlock board

X22 (2)

Earth (slit lamp base)

X23

Earth (delivery head)

X32

Trigger

Black HV

Trigger

X46

Dimmer module

X56

Joystick

X43

Console (communications)

X45

Console (power)

1

With the assembly on its side, insert all cables except X43 and X45 through the hole in the slit lamp base. Insert the cable as far as possible.

2

Turn the assembly upright. Support the base to avoid crushing X43 and X45.

3

Connect the following cables to slit lamp b ase connections: o

X22 cable to the earth point on the base (two cables)

o

X47 to the dimmer module (and cable tie)


6

Adjust cable length as shown below.

X3

300

X4

250

X23, X32, X34

160

7

Temporarily tape the cables to the upper slit lamp base cover to prevent them from moving.

8

Place the lower slit lamp base cover into position.

9

Slide the delivery head onto the shaft, and secure it just above the upper slit lamp base cover and cables. Allow enough room to insert the cables.

10

Connect X18 to the interlock board.

11

Remove the tape that temporarily secured the cables to the upper slit lamp base cover.

12

Insert the rest of the cables through the delivery head, and secure them to the inside of the delivery head with two cable ties. Loop the cable ties around the two screws located inside the delivery head. The black high voltage cable should be secured to the right and all others secured to the left.

13

Lower the delivery head. Ensure the cables are not pinched, and that the delivery head can move left and right without restriction.


7.11 Diode aiming module (SLT DAM) Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information. 


Procedure 1


2

Disconnect X13 from the SLT attenuator.

3

Connect a shorting plug to X13 to protect the SLT DAM.

4

Remove the three screws and washers, and detach the SLT DAM. As you must tilt the SLT DAM to remove it, place your fingers over the three screw holes to prevent the screws and washers from falling out.


7.12 Diode aiming module (YAG DAM) Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information. 

This procedure only applies to the Tango and Ultra Q.

Procedure 1


2


3

Disconnect X13 DAM cable from the YAG attenuator using the connector extraction tool.

4

Remove the three screws, and remove the DAM from the delivery head.


6

(Tango) On the fire control board, push switch 1 of the 8-way DIP switch up (ON). This restricts calibration tests to the YAG path only.

sm_tsu_0035b

Alignment and calibration 1


2

Align the YAG burn and DAM (refer to 4.3.4 Aligning the YAG laser on page 38 )

3

Adjust DAM polarisation (refer 4.3.5 Adjusting YAG diode aiming module polarisation (YAG DAM) on page 41 )


7.13 Dimmer module Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information.

Procedure 1


2


3

Detach the aiming beam and slit lamp dimmer controls. For older devices: o


o

slackening the locking collet (use the collet knob tool)

o

sliding the knob from the shaft.

For newer devices:

4

o

loosen the grub screw in the side of the knob

o

slide the knob from the shaft.

Disconnect the delivery head from the console, and place it upright on a soft working surface (for example, bubble wrap). Support the delivery head from underneath to avoid crushing the cables.


11

Disconnect J1 and J2 connectors on the board.

12

Loose (do not remove) the two dimmer board screws. Use a ball-ended 2.5 mm Allen key and access the dimmer module screws through the holes in the lower slit lamp base cover (for the illumination intensity and aiming beam intensity controls).

13

Lift the end of the module closest to the joystick and then slide the module out.


7.14 Emergency stop switch Warnings and notes 

Not applicable.

Procedure 1

Access the console (refer to 7.5.3 Console modules on page 96 ).

2

Use a knife to remove the heatshrink from the emergency stop switch.

3

Desolder the four cables from the switch.

4

Depress the release tab on top of the switch, and pull off the rear rectangular section of the switch.

5

Remove the switch collar from the rear of the switch.

6

Remove the switch from the console.

7

Place 20 mm of heatshrink over each of the four cables that connect to the switch.

8

Remove the rear rectangular section of the switch and collar from the replacement switch.

9

Insert the switch into the console from the front, with the release tab facing up. Ensure that the red text on the button is horizontal.

10

Secure the collar (finger tight).


7.15 Fire control board Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information.

Procedure 1

Turn the device on.

2

Enter Service mode (refer to 6.1.1 Service mode on page 71 ).

3

Use the energy control on the delivery head to highlight VIEW CONSTANTS, and press  to

4

select this option.

Record the values for following constants: o

YAG DAM

o

SLT DAM

o

SP VOLTAGE

o

DP VOLTAGE

o

TP VOLTAGE

o

YAG ZERO

o

SLT ZERO.

Use the energy control scroll through the list of constants.


10

Remove the two hinge screws, and detach the board.

X2 X1


7.16 Fixation lamp Warnings and notes (LED) Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information. 

Procedures are provided for both bulb and LED fixation lamps.

Procedure for bulb 1

Remove the fixation bulb cap (the inner silver ring) by turning it counter-clockwise. Use surgical gloves to grip the cap.

2

Gently remove the bulb.

3

Install the replacement, and reassemble the device. Do not over tighten the cap.

Procedure for LED 1


2

Remove the cap from the fixation lamp. Observe how the slots in the screw thread hold the board in place in the correct orientation.

3

Remove the board, and unplug the connector.


7.17 Folding mirror (YAG) Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information. 

Do not touch the optics.



This procedure only applies to the Tango and Ultra Q.



This module contains the laser folding mirror (which is not adjustable) and the DAM alignment mirrors (which are adjustable).

Procedure 1


2


3

Remove the three folding mirror screws and washers.


7.18 Interlock board Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information. 

This procedure only applies to the Tango.

Procedure 1


2


3

Remove the slit lamp (refer to 7.6.2 Slit lamp on page 98 ).

4

Place the delivery head on its left side.

5

Push the delivery head along the shaft as far as the cables allow, and swing it up.

6

Disconnect X18 from the interlock board.

7

Use a ball-ended Allen key to remove the two screws, and remove the board.


7.19 Joystick Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information. 



The terminal block does not normally need to be replaced. Observe how the wiring is positioned within the delivery head. Recreate this layout when you insert the cable back into the delivery head.

Procedure 1


2

Remove the slit lamp illumination tower from the delivery head (refer to 7.6.2 Slit lamp on page 98 ).

3


4

Detach the aiming beam and slit lamp d immer controls. For older devices: o


o

slackening the locking collet (use the collet knob tool)

o

sliding the knob from the shaft.


13

Place the assembly on one side.

14

Remove the four screws that secure the lower slit lamp base cover to the base.

15

(Joysticks with retainer plate) Remove the Teflon joystick foot.

16

Place the assembly upright.

17

Remove the lower slit lamp base cover.

18

Loosen (do not remove) the two screws on the terminal block, and remove the two joystick wires.


20

Turn the joystick to align the cavity with one of the three screws, and remove the screw and washer. Repeat this to remove all three screws that secure the housing in place.

21

Remove the bell housing. The housing may be difficult to remove. Lever the bell housing up using flat ended screw driver(s) if necessary.


24

Screw the joystick to the base.

25

Screw the bell housing to the joystick. You must align the inner cut out in the housing ring with the joystick pin (refer to the previous illustration).

26

Carefully feed the joystick cable through the heatshrink that is glued to the base.

27

Twist the ends of each joystick cable (to prevent shorting).

28

Connect the cables to the terminal block. Connect the longer cable to the top terminal block connector. When connecting a cable to a connector: o o o

29

Place the cable underneath the screw. Tighten the screw; this will wind the cable around the screw. Gently pull the cable to test that it is secure.

(Joysticks that have a retainer plate) Turn the assembly over, attach t he Teflon joystick foot and turn the assembly upright.

30

Ensure joystick movement in all axes is smooth. If the movement is smooth: o

Reassemble the device.

o

Perform alignment and calibration tasks.

If the movement is not smooth: o

Remove the bell housing.


7.20 Keyswitch Warnings and notes 

This item is also called a switch lock.

Procedure 1


2

Cut the heatshrink from the pins on the keyswitch, and remove the solder from the wires.

3

Remove the nut and washer that secures the keyswitch to the console, and remove the keyswitch.

4

Insert the replacement, and orient the keyswitch so that externally, the flat side of the key faces up and internally, pin 5 is at the top.

5

Secure the switch with the star washer and nut. The rough side of the star washer must face the metal to ensure a firm grip.

6

Place approximately 20 mm of heatshrink over each wire then solder the four wires to the keyswitch, using the illustration below for reference.


7.21 Laser power switch Warnings and notes 

Not applicable.

Procedure 1


2

Pull off the six wires from the rear of the switch.

3

Depress the four corner restraining clips, and push the switch out through the console.

4

Partially insert the switch with pin B facing up.

5

Connect the six wires. k c a l B ) K B (

d e n g a d n r e a R O ) ) R ( O (

1

B

2

1

A

2

e g n a r O ) O (

B1 B B2 A1 A A2

(O) Orange (BK) Black (R) Red and (O) Orange (R) Red (O) Orange (R) Red


7.22 Objective lens Warnings and notes 

Do not touch the lens.

Procedure 1


2

Remove the inserts that cover the two top objective lens set screws.

3

Loosen, but do not remove, the set screws.


7.23 Power indicator Warnings and notes 

Not applicable.

Procedure 1


2

Pull off the two power indicator wires.

3

Depress the two tabs, and push the power indicator out through the front of the console. Rotate the indicator to access the lower tab if necessary.


7.24 Power supply (DC) Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information.

Procedure 1


2

Remove the two screws, and detach the DC PSU cover.

3

Disconnect J1, J3 and the earth (PE) from the DC PSU. J3


7.25 Power supply (YAG) Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information.

Procedure 1


2

Disconnect the capacitor wires (CAP+ and CAP-).

3

Disconnect X27, X28 and X43.

4

Remove the four screws, and detach the YAG PSU.

5

Install the replacement, and reassemble the device. Different versions of the YAG PSU exist; these are shown below. X43

+

CAP- CAP+

-


Alignment and calibration 1


2

Perform the voltage window test (refer to 5.4.1 Voltage window test on page 60 ).

3

(Tango and Ultra Q) Calibrate the YAG energy monitor (refer to 5.4.3 YAG energy monitor on page 62 ).

4

(Tango and Solo) Calibrate the SLT energy monitor (refer to 5.4.6 SLT energy monitor on page 65 ).

5

Complete the PAF.


7.26 Prism tower Warnings and notes 


Procedure 1


2

Remove the three illumination tower housing screws (two at the front, one at the rear).

Prism tower

Reference mark


7.27 Safety filter

Tango/Solo

Ultra Q sm_tsu_0054

Warnings and notes 

None applicable.

Procedure 1


2

Loosen the magnification changer locking clamp, and detach the magnification changer and binocular.

3

Remove the four screws that secure the safety filter, and remove the filter.


7.28 SLT delivery carriage Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information. 




The replacement SLT delivery carriage includes a KTP crystal and an SLT folding mirror.



The following items are reused from the old carriage: o

SLT DAM

o

fire control board

o

SLT attenuator.

Procedure 1


2

Remove the SLT delivery carriage from the delivery head (refer to 7.5.2 SLT delivery carriage on page 94 ).

3

From the old carriage remove each assembly listed below attach it to the new carriage : o

SLT DAM (refer to 7.11 Diode aiming module (SLT DAM) on page 107 )

o

Fire control board (refer to 7.15 Fire control board on page 113 ) SLT attenuator (refer to

Attenuator (SLT)

99 )


7.30 YAG laser cavity Warnings and notes Follow electro-static discharge (ESD) safety precautions. Refer to 7.2 Electro-static safety procedures on page 86 for more information. Handle the cavity with care. Knocking the mirror assemblies at either end of the module will cause the cavities to be misaligned, resulting in poor performance. 

Follow these instructions if you need to replace the trigger.

Procedure 1


2

(Tango) Remove the top right screw, and swing the fire control board out.

3

Remove the two screws, and detach the energy control.


7

Remove the three screws, and detach the trigger/cavity assembly.

sm_tsu_0056a

8

Disconnect the three cables and remove the two screws to detach the trigger from the cavity.



8

Schematics

1021-7196

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