VersaPulse Select User manual

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VersaPulse®Select™
SERVICE MANUAL
0621-499-01
DEC. 95
This service manual is to be used in conjunction with the operator manual for the product. The
operator manual contains important information regarding instrument description, location of
controls, specifications, and normal operating procedures.
VISIBLE AND INVISIBLE LASER RADIATION.
AVOID EYE OR SKIN EXPOSURE TO
DIRECT OR SCATTERED RADIATION.
CLASS IV LASER PRODUCT
DANGER
HOLMIUM:YAG LASER: 2.1 MICROMETERS
MAX OUTPUT 5 JOULES 250 µs PULSE
Nd:YAG LASER: 1.06 MICROMETERS
MAX. OUTPUT 2 JOULE 350 µs PULSE
DIODE LASER: 650 NANOMETERS
MAX OUTPUT 5 MILLIWATTS
2400 Condensa Street
Santa Clara, CA 95051
[phone]
VISIBLE AND INVISIBLE LASER RADIATION.
AVOID EYE OR SKIN EXPOSURE TO
DIRECT OR SCATTERED RADIATION.
CLASS IV LASER PRODUCT
DANGER
HOLMIUM:YAG LASER: 2.1 MICROMETERS
MAX OUTPUT 5 JOULES 250 µs PULSE
DIODE LASER: 650 NANOMETERS
MAX OUTPUT 5 MILLIWATTS
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This manual is copyrighted with all rights reserved. Under the copyright laws, this manual cannot be copied
in whole or part without the express written permission of Coherent, Inc. Permitted copies must carry the
same proprietary and copyright notices as were affixed to the original.
Please note that while every effort has been made to ensure that the data given is accurate, the information,
figures, illustrations, tables, specifications, and schematics are subject to change without notice.
Coherent and the Coherent Logo are registered trademarks of Coherent, Inc.
Please direct all inquiries about this manual to:
Coherent, Inc.
Technical Support B-35
2400 Condensa Street
Santa Clara, CA 95051
[phone]
© Coherent, Inc 01/94, 07/94, 08/95, 10/95, 12/95
0621-499-01

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VersaPulse Select Service Manual Disclaimer 0621-499-01 12/95
DISCLAIMER
Coherent service manuals are written specifically for use by Coherent service engineers who have received
formal training in the servicing of Coherent equipment, and by customers who have taken and passed a
Coherent certification service training course for the equipment being serviced. Information on certification
service training courses offered to customers can be obtained by contacting the Technical Training Coordina-
tor at 800-367-7899.
Coherent does not accept responsibility for personal injury or property damage resulting from the servicing
of Coherent equipment by its customers or by third parties, except where such injury or property damage is a
direct result of Coherent's negligence. Customers, by accepting the service manual, agree to indemnify
Coherent against any claims alleging personal injury or property damage resulting from the servicing of
Coherent equipment by the customer or by third parties, except where such injury or property damage is a
direct result of Coherent's negligence. These limitations include situations where Coherent personnel are
advising customers on the repair of Coherent equipment over the telephone.
The servicing of Coherent equipment by persons who have not passed a current Coherent certification
service training course for that equipment will void Coherent's product warranty.

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VersaPulse Select Service Manual Revision Information 0621-499-01 12/95
REVISION INFORMATION
This is the DEC '95 release of the Versapulse Select Service Manual. Contact Coherent Medical Group Techni-
cal Support to determine if this is the most current release of this service manual.
Each page of this manual has a MM/YY date at the bottom. This indicates the release date for the individual
page. Note that when the manual is updated, not all of the pages are necessarily updated, so some pages
may have a MM/YY earlier than the release date for the manual (the release date for the manual is the MM/
YY that appears on the cover and in the first sentence of this revision information page). The following list
provides a complete list of the release date information, by section, for this release of the service manual.
Cover page, copyright page, disclaimer page, this page, table of contents page or pages are all dated with the
release date of the manual (12/95).
SECTION 1 Pages 1-1, 01/94
Pages 1-2, 12/95
SECTION 2 Pages 2-1,4,6 12/95. All other pages 03/94.
SECTION 3 Pages 3-1 thru 3-10 12/95. All other pages, 03/94.
SECTION 4 Pages 4-4 Thru 4-17, 4-22 Thru 4-30, 12/95.
All other pages, 01/94
SECTION 5 All pages, 12/95
SECTION 6 All pages, 12/95
SECTION 7 FSB's released for this service manual are listed in the Versapulse Select FSB
Index. Each time an FSB for this manual is released or updated the Index is
also updated and distributed with the FSB. The current Index is placed
behind the single sheet that makes up Section 7, and the FSB's are placed in
order behind the Index. Contact Coherent Medical Group Technical Support
for the date of the most current FSB Index.
SECTION 8 Page 8-1,12, 10/95
Pages 8-2 thru 8-11, 8-13 thru 8-18, 01/94
Pages 8-19 thru 8-30, 08/95
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Table Of Contents
DISCLAIMER .................................................................................................................................................. 3
REVISION INFORMATION ........................................................................................................................ 4
1.0 GENERAL INFORMATION ............................................................................................................... 1
1.1 USE OFTHIS MANUAL ....................................................................................................................... 1
1.2 CONVENTIONS USED IN THIS MANUAL....................................................................................... 1
1.3 SERIAL NUMBERS ............................................................................................................................... 2
2.0 INSTALLATION .................................................................................................................................... 1
2.1 INSTALLATION INSTRUCTIONS......................................................................................................1
3.0 CALIBRATION & ADJUSTMENT .................................................................................................... 1
3.1 OVERVIEW............................................................................................................................................1
3.1.1 Safety Precautions .................................................................................................................................. 1
3.2 System Check Out ..................................................................................................................................2
3.3 Energy Monitor andAutomatic Laser Calibration..............................................................................5
3.4.1 Making Test Burns .................................................................................................................................. 7
3.4.2 Adjusting the YAG Channel Optics .......................................................................................................7
3.4.3 YAG Channel Check Out and Adjustment Procedure.........................................................................8
3.5 AIMING BEAM ADJUSTMENT ........................................................................................................ 10
3.6 PERIODIC MAINTENANCE REQUIREMENTS............................................................................13
4.0 THEORY OF OPERATION.................................................................................................................. 1
4.1 INTRODUCTION ...................................................................................................................................1
4.1.1 Operational Overview .............................................................................................................................1
4.1.2 Functional Overview ...............................................................................................................................2
4.2 POWER SWITCHING, CONDITIONING, DISTRIBUTION .......................................................... 5
4.2.1 Input Power.............................................................................................................................................. 5
4.2.2 Circuit Breaker on, Keyswitch off .........................................................................................................5
4.2.3 Turn on .....................................................................................................................................................5
4.2.4 Shutdown..................................................................................................................................................6
4.2.5 Low Voltage Power Supplies...................................................................................................................6
4.3 COOLING................................................................................................................................................7
4.4 CONTROL ELECTRONICS ................................................................................................................. 9
4.4.1 Overview................................................................................................................................................... 9
4.4.2 Main Processor ......................................................................................................................................10
4.4.3 Shutter / Footswitch / Remote Interlock Circuits............................................................................... 11
4.4.4 Servo Motor Control Circuit ................................................................................................................13
4.4.5 HVPS & PFN Control Circuits ............................................................................................................14
4.4.6 Energy Monitor Circuits.......................................................................................................................17
4.4.7 Touch Screen & Remote Control Circuits...........................................................................................18
4.4.8 Aiming Diode Laser Circuit .................................................................................................................. 20
4.4.9 Fiber and Blast Shield Position Sense Circuits ...................................................................................21
4.4.10 Service Attenuator Circuit .................................................................................................................. 22
4.4.11 Coolant Temperature and Conductivity Monitoring Circuits.........................................................23
4.4.12 Low Energy Attenuator Circuit ......................................................................................................... 24
4.4.13 DC Power Supply Voltage Monitoring Circuits.................................................................................24
4.4.14 Safety Processor....................................................................................................................................25
4.5 FLASH LAMP POWER CIRCUITS..................................................................................................27
4.6 OPTICS .................................................................................................................................................27
4.7 SOFTWARE..........................................................................................................................................29

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5.0 TROUBLESHOOTING ........................................................................................................................ 1
5.1 OVERVIEW.............................................................................................................................................1
5.1.1 Service Philosophy..................................................................................................................................1
5.1.2 Safety Precautions .................................................................................................................................. 2
5.2 INTERIOR ACCESS & PARTLOCATIONS .....................................................................................3
5.3 SERVICE MODE ................................................................................................................................. 12
5.4 FAULTISOLATION ............................................................................................................................14
5.4.1 TURN-ONAND SHUTDOWN FAULTISOLATION ......................................................................15
5.4.2 "NO FAULTCODE REPORTED" FAULTISOLATION ...............................................................15
5.4.3 "FAULTCODE REPORTED" FAULTISOLATION .....................................................................15
6.0 SELECTED PARTS ................................................................................................................................ 1
8.0 SCHEMATICS AND DRAWINGS .................................................................................................... 1

VersaPulse Select Service Manual
0621-499-01 01/94 GENERAL INFORMATION
1-1
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1.0 GENERAL INFORMATION
1.1 USE OF THIS MANUAL
This manual contains service instructions for the Coherent VersaPulse Select series of Holmium:YAG surgical
lasers. The content of this manual is intended solely for use by Coherent Medical Group Field Service Engineers
and Coherent trained and certified customer technicians. Coherent, Inc. can not be responsible for service or
repairs attempted by uncertified persons, and the use of this manual by such persons is prohibited.
This manual is to be in conjunction with the Coherent Operator Manual for the VersaPulse Select. The operator
manual contains important information regarding instrument description, location of controls, specifications,
and normal operating procedures.
As necessary, Coherent Medical Group Service Technical Support releases Field Service Bulletins for the
Versapulse Select series. These bulletins supplement the information in this manual. As they are released, the
bulletins become a part of this manual (Section 7).
1.2 CONVENTIONS USED IN THIS MANUAL
Within the text, logic signals that are active low ("notted") will appear inside of slash marks, as illustrated below.
/BRHOK/
These signals are "active", or true, when the logic level is low. When the logic signal /BRHOK/ is low, the BRH
loop is "OK" (complete). When the logic signal /BRHOK/ is high, the BRH loop is not OK (open).
In most of the schematic diagrams such signals are indicated by the more usual solid line above the signal name,
as illustrated below.
The schematics in this manual do not include individual numbers for the logic elements or operational amplifiers
within a single component. For example, U1 below contains two operational amplifiers. The top op amp would
be referred to as U1-1 ( its output is pin 1), and the other would be referred to as U1-7.
BRHOK

GENERAL INFORMATION
1-2 VersaPulse Select Service Manual 0621-499-01 12/95
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U1
2
31
U1
6
57
1.3 SERIAL NUMBERS
Serial numbers for the Versapulse Select are in the format,
MYPHWVXXXX
where M is the month produced
(a is January, b is February, etc..)
Y is the last digit of the year produced
(4 is 1994., etc..)
P is a number indicating maximum system power
(6=60w, 4=45w, 3=30w)
H is the number of laser heads installed (1, 2, 3, or 4)
W is a number indicating the mix of rods installed
(See Below)
V is a number indicating power supply configuration
(1= 208VAC single phase)
XXXX is the number of the laser built
(0001, 0002, etc..)
W: 1= Holmium only
2= Erbium only
3= Nd:Yag only
5= Nd/Ho combo

INSTALLATION
2-1
VersaPulse Select Service Manual
0621-499-01 12/95
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2.0 INSTALLATION
2.1 INSTALLATION INSTRUCTIONS
These installation instructions are provided for use by Coherent Service Engineers who have completed
certification service training on the VersaPulse Select. Installation by untrained persons is a potential hazard
to the person or persons doing the installation, others present, and to the equipment itself. In addition,
improper installation is a potential hazard to the user, persons present during use, and patient.
Perform the following steps to install a VersaPulse Select system.
1. Check for proper site set up. This includes proper AC service and adequate space for the console.
AC power configuration: The VersaPulse Select requires 220 VAC ±10%, 50/60 Hz, 30 amp single
phase electrical service. The power cord is a 26 foot cable with 3 conductors. A terminal board
behind the right side cover allows for tapping of the isolation transformer to the setting closest to the
incoming electrical service. The system can be hard wired to electrical service or installed to electrical
service with a plug and receptacle. The plug and receptacle are shipped in the site preparation kit.
Console dimensions and weight: The console measures 39" l x 18" w x39" h. It weighs approximately
325 lbs. A minimum of 18" of air space is required around the unit to provide adequate cooling air
circulation.
The system requires approximately 2.5 gallons of deionized water for its closed loop cooling system.
The coolant must be added as described in this procedure.
Complete specifications for the VersaPulse Select are included in the VersaPulse Select Operator
Manual. Contact Technical Support in Palo Alto, CA, if there are any questions concerning site
preparation.
2.) Check the crate/carton for any shipping damage.

INSTALLATION
2-2 VersaPulse Select Service Manual 0621-499-01 12/95
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LIFTING BAR (2)
Rear lifting bolts
(2, 5/8ths)
Front lifting bolts
(2, 3/4ths)
As the bolts turn, the lifting bar is raised or lowered. The system
ships with the lifting bar up. The bar must be lowered and removed,
then the system is rolled down the wooden ramps to remve it from
the crate base.
Removable
wooden ramp (2)
FIGURE 2.1 SHIPPING CRATE
Accessories
CARDBOARD SIDE COVER
CARDBOARD TOP COVER
STRAP
STRAP
WOODEN
BASE
FOAM
WOODEN RAMPS
03/94