Air Plasma Cutting
Power Supply
A-02464
Service Manual
August 23, 1999
Manual No. 0-2747
WARNING
Read and understand this entire manual and your employer’s
safety practices before installing, operating, or
servicing the equipment.
WARNING
While the information contained in this manual represents our
best judgement, Thermal Dynamics Corporation assumes no
liability for its use.
Pak Master® 75XL PLUS Air Plasma Cutting Power Supply
Service Manual Number 0-2747
Published by:
Thermal Dynamics Corporation
Industrial Park No. 2
West Lebanon, New Hampshire, USA 03784
(603) 298-5711
Copyright 1999 by
Thermal Dynamics Corporation
All rights reserved.
Reproduction of this work, in whole or in part, without written
permission of the publisher is prohibited.
The publisher does not assume and hereby disclaims any liability
to any party for any loss or damage caused by any error or
omission in the Pak Master® 75XL PLUS Air Plasma Cutting
Power Supply Service Manual, whether such error results from
negligence, accident, or any other cause.
Printed in the United States of America
August 1999
Record Serial Numbers For Warranty Purposes
Purchase Date
Power Supply
Torch
TABLE OF CONTENTS
SECTION 1:
GENERAL INFORMATION .................................................................................................. 1
1.01
1.02
1.03
1.04
1.05
1.06
1.07
1.08
Notes, Cautions and Warnings ...................................................................... 1
Important Safety Precautions ........................................................................ 1
Publications ................................................................................................... 2
Note, Attention et Avertissement ................................................................... 3
Precautions De Securite Importantes ............................................................ 3
Documents De Reference ............................................................................. 5
Declaration of Conformity .............................................................................. 7
Statement of Warranty ................................................................................... 8
SECTION 2:
INTRODUCTION ................................................................................................................. 9
2.01 Scope Of Manual ........................................................................................... 9
2.02 General Service Philosophy .......................................................................... 9
2.03 Service Responsibilities ................................................................................. 9
SECTION 3:
DESCRIPTION .................................................................................................................. 11
3.01
3.02
3.03
3.04
Scope .......................................................................................................... 11
General Description of System .................................................................... 11
Specifications/Design Features ................................................................... 11
Power Supply Options and Accessories ...................................................... 12
SECTION 4:
SERVICE TROUBLESHOOTING DIAGNOSTICS ............................................................. 13
4.01
4.02
4.03
4.04
4.05
4.06
4.07
4.08
4.09
Introduction .................................................................................................. 13
Periodic Inspection & Procedures ................................................................ 13
Common Operating Problems ..................................................................... 13
Troubleshooting Guide - General Information ............................................... 14
Circuit Fault Isolation ................................................................................... 15
Main Input and Internal Power Problems ..................................................... 16
Pilot Arc Problems ....................................................................................... 18
Main Arc Problems ...................................................................................... 20
Test Procedures ........................................................................................... 20
SECTION 5:
REPAIRS & REPLACEMENT PROCEDURES ................................................................... 29
5.01
5.02
5.03
5.04
5.05
5.06
5.07
5.08
5.09
Introduction .................................................................................................. 29
Anti-Static Handling Procedures .................................................................. 29
Parts Replacement - General Information .................................................... 29
Major External Parts Replacement .............................................................. 30
Access Panel Parts Replacement ................................................................ 30
Front Panel Parts Replacement ................................................................... 31
Left Side Internal Component Parts Replacement ....................................... 32
Rear Panel Parts Replacement ................................................................... 34
Right Side Internal Component Parts Replacement ..................................... 34
TABLE OF CONTENTS (continued)
SECTION 6:
PARTS LISTS ..................................................................................................................... 37
6.01
6.02
6.03
6.04
6.05
6.06
6.07
6.08
6.09
Introduction .................................................................................................. 37
Ordering Information .................................................................................... 37
Major External Replacement Parts List ........................................................ 38
Access Panel Replacement Parts List ......................................................... 40
Front Panel Replacement Parts List ............................................................. 42
Left Side Internal Component Replacement Parts List ................................ 44
Rear Panel Replacement Parts List ............................................................. 46
Right Side Internal Component Replacement Parts List .............................. 48
Options and Accessories ............................................................................. 50
APPENDIX I: INPUT WIRING REQUIREMENTS ...................................................................... 51
APPENDIX II: SEQUENCE OF OPERATION (BLOCK DIAGRAM) ........................................... 52
APPENDIX III: POT/LED PC BOARD LAYOUT .......................................................................... 53
APPENDIX IV: LOGIC/GATE PC BOARD LAYOUT ................................................................... 54
APPENDIX V: PILOT OUTPUT PC BOARD LAYOUT ................................................................ 56
APPENDIX VI: CD PC BOARD LAYOUT ................................................................................... 58
APPENDIX VII: INPUT PC BOARD LAYOUT ............................................................................. 59
APPENDIX VIII: FET PC BOARD LAYOUT ................................................................................ 60
APPENDIX IX: CAPACITOR PC BOARD LAYOUT .................................................................... 62
APPENDIX X: 36VAC CIRCUIT DIAGRAM ............................................................................... 63
APPENDIX XI: SYSTEM SCHEMATIC ...................................................................................... 64
SECTION 1:
GENERAL INFORMATION
GASES AND FUMES
Gases and fumes produced during the plasma cutting
process can be dangerous and hazardous to your health.
1.01 Notes, Cautions and Warnings
• Keep all fumes and gases from the breathing area.
Keep your head out of the welding fume plume.
Throughout this manual, notes, cautions, and warnings
are used to highlight important information. These highlights are categorized as follows:
• Use an air-supplied respirator if ventilation is not
adequate to remove all fumes and gases.
NOTE
• The kinds of fumes and gases from the plasma arc
depend on the kind of metal being used, coatings
on the metal, and the different processes. You must
be very careful when cutting or welding any metals which may contain one or more of the following:
An operation, procedure, or background information which requires additional emphasis or is helpful in efficient operation of the system.
CAUTION
Antimony
Arsenic
Barium
Beryllium
Cadmium
A procedure which, if not properly followed, may
cause damage to the equipment.
Chromium
Cobalt
Copper
Lead
Manganese
Mercury
Nickel
Selenium
Silver
Vanadium
• Always read the Material Safety Data Sheets (MSDS)
that should be supplied with the material you are
using. These MSDSs will give you the information
regarding the kind and amount of fumes and gases
that may be dangerous to your health.
WARNING
A procedure which, if not properly followed, may
cause injury to the operator or others in the operating area.
• For information on how to test for fumes and gases
in your workplace, refer to item 1 in Subsection
1.03, Publications in this manual.
1.02 Important Safety Precautions
• Use special equipment, such as water or down draft
cutting tables, to capture fumes and gases.
WARNINGS
• Do not use the plasma torch in an area where combustible or explosive gases or materials are located.
• Phosgene, a toxic gas, is generated from the vapors
of chlorinated solvents and cleansers. Remove all
sources of these vapors.
OPERATION AND MAINTENANCE OF
PLASMA ARC EQUIPMENT CAN BE DANGEROUS AND HAZARDOUS TO YOUR
HEALTH.
ELECTRIC SHOCK
Plasma arc cutting produces intense electric and
magnetic emissions that may interfere with the
proper function of cardiac pacemakers, hearing
aids, or other electronic health equipment. Persons who work near plasma arc cutting applications should consult their medical health professional and the manufacturer of the health
equipment to determine whether a hazard exists.
Electric Shock can injure or kill. The plasma arc process
uses and produces high voltage electrical energy. This
electric energy can cause severe or fatal shock to the operator or others in the workplace.
To prevent possible injury, read, understand and
follow all warnings, safety precautions and instructions before using the equipment. Call 1-603298-5711 or your local distributor if you have any
questions.
• Wear dry gloves and clothing. Insulate yourself from
the work piece or other parts of the welding circuit.
• Never touch any parts that are electrically “live” or
“hot.”
• Repair or replace all worn or damaged parts.
• Extra care must be taken when the workplace is
moist or damp.
Date: 6/22/99
1
GENERAL INFORMATION
• Install and maintain equipment according to NEC
code, refer to item 9 in Subsection 1.03, Publications.
• To protect your eyes, always wear a welding helmet or shield. Also always wear safety glasses with
side shields, goggles or other protective eye wear.
• Disconnect power source before performing any service or repairs.
• Wear welding gloves and suitable clothing to protect your skin from the arc rays and sparks.
• Read and follow all the instructions in the Operating Manual.
• Keep helmet and safety glasses in good condition.
Replace lenses when cracked, chipped or dirty.
• Protect others in the work area from the arc rays.
Use protective booths, screens or shields.
FIRE AND EXPLOSION
• Use the shade of lens as suggested in the following
per ANSI/ASC Z49.1:
Fire and explosion can be caused by hot slag, sparks, or
the plasma arc.
• Be sure there is no combustible or flammable material in the workplace. Any material that cannot be
removed must be protected.
• Ventilate all flammable or explosive vapors from
the workplace.
Arc Current
Minimum Protective
Shade No.
Suggested
Shade No.
Less Than 300*
8
9
300 - 400*
9
12
400 - 800*
10
14
* These values apply where the actual arc is clearly
seen. Experience has shown that lighter filters
may be used when the arc is hidden by the workpiece.
• Do not cut or weld on containers that may have held
combustibles.
• Provide a fire watch when working in an area where
fire hazards may exist.
1.03 Publications
• Hydrogen gas may be formed and trapped under
aluminum workpieces when they are cut underwater or while using a water table. DO NOT cut
aluminum alloys underwater or on a water table
unless the hydrogen gas can be eliminated or dissipated. Trapped hydrogen gas that is ignited will
cause an explosion.
Refer to the following standards or their latest revisions
for more information:
1. OSHA, SAFETY AND HEALTH STANDARDS,
29CFR 1910, obtainable from the Superintendent of
Documents, U.S. Government Printing Office, Washington, D.C. 20402
2. ANSI Standard Z49.1, SAFETY IN WELDING AND
CUTTING, obtainable from the American Welding
Society, 550 N.W. LeJeune Rd, Miami, FL 33126
NOISE
Noise can cause permanent hearing loss. Plasma arc processes can cause noise levels to exceed safe limits. You
must protect your ears from loud noise to prevent permanent loss of hearing.
3. NIOSH, SAFETY AND HEALTH IN ARC WELDING AND GAS WELDING AND CUTTING, obtainable from the Superintendent of Documents, U.S.
Government Printing Office, Washington, D.C. 20402
• To protect your hearing from loud noise, wear protective ear plugs and/or ear muffs. Protect others
in the workplace.
4. ANSI Standard Z87.1, SAFE PRACTICES FOR OCCUPATION AND EDUCATIONAL EYE AND FACE
PROTECTION, obtainable from American National
Standards Institute, 1430 Broadway, New York, NY
10018
• Noise levels should be measured to be sure the decibels (sound) do not exceed safe levels.
5. ANSI Standard Z41.1, STANDARD FOR MEN’S
SAFETY-TOE FOOTWEAR, obtainable from the
American National Standards Institute, 1430 Broadway, New York, NY 10018
• For information on how to test for noise, see item 1
in Subsection 1.03, Publications, in this manual.
6. ANSI Standard Z49.2, FIRE PREVENTION IN THE
USE OF CUTTING AND WELDING PROCESSES,
obtainable from American National Standards Institute, 1430 Broadway, New York, NY 10018
PLASMA ARC RAYS
Plasma Arc Rays can injure your eyes and burn your skin.
The plasma arc process produces very bright ultra violet
and infra red light. These arc rays will damage your
eyes and burn your skin if you are not properly protected.
GENERAL INFORMATION
7. AWS Standard A6.0, WELDING AND CUTTING
CONTAINERS WHICH HAVE HELD COMBUSTIBLES, obtainable from American Welding Society,
550 N.W. LeJeune Rd, Miami, FL 33126
2
Date 6/22/99
8. NFPA Standard 51, OXYGEN-FUEL GAS SYSTEMS
FOR WELDING, CUTTING AND ALLIED PROCESSES, obtainable from the National Fire Protection
Association, Batterymarch Park, Quincy, MA 02269
AVERTISSEMENT
9. NFPA Standard 70, NATIONAL ELECTRICAL CODE,
obtainable from the National Fire Protection Association, Batterymarch Park, Quincy, MA 02269
Toute procédure pouvant provoquer des blessures
de l’opérateur ou des autres personnes se trouvant
dans la zone de travail en cas de non-respect de la
procédure en question.
10. NFPA Standard 51B, CUTTING AND WELDING
PROCESSES, obtainable from the National Fire Protection Association, Batterymarch Park, Quincy, MA
02269
1.05 Precautions De Securite
Importantes
11. CGA Pamphlet P-1, SAFE HANDLING OF COMPRESSED GASES IN CYLINDERS, obtainable from
the Compressed Gas Association, 1235 Jefferson
Davis Highway, Suite 501, Arlington, VA 22202
AVERTISSEMENTS
12. CSA Standard W117.2, CODE FOR SAFETY IN
WELDING AND CUTTING, obtainable from the Canadian Standards Association, Standards Sales, 178
Rexdale Boulevard, Rexdale, Ontario, Canada M9W
1R3
L’OPÉRATION ET LA MAINTENANCE DU
MATÉRIEL DE SOUDAGE À L’ARC AU JET
DE PLASMA PEUVENT PRÉSENTER DES
RISQUES ET DES DANGERS DE SANTÉ.
13. NWSA booklet, WELDING SAFETY BIBLIOGRAPHY obtainable from the National Welding Supply
Association, 1900 Arch Street, Philadelphia, PA 19103
Coupant à l’arc au jet de plasma produit de l’énergie
électrique haute tension et des émissions
magnétique qui peuvent interférer la fonction
propre d’un “pacemaker” cardiaque, les appareils
auditif, ou autre matériel de santé electronique.
Ceux qui travail près d’une application à l’arc au
jet de plasma devrait consulter leur membre
professionel de médication et le manufacturier de
matériel de santé pour déterminer s’il existe des
risques de santé.
14. American Welding Society Standard AWSF4.1, RECOMMENDED SAFE PRACTICES FOR THE PREPARATION FOR WELDING AND CUTTING OF CONTAINERS AND PIPING THAT HAVE HELD
HAZARDOUS SUBSTANCES, obtainable from the
American Welding Society, 550 N.W. LeJeune Rd,
Miami, FL 33126
15. ANSI Standard Z88.2, PRACTICE FOR RESPIRATORY PROTECTION, obtainable from American
National Standards Institute, 1430 Broadway, New
York, NY 10018
Il faut communiquer aux opérateurs et au personnel TOUS les dangers possibles. Afin d’éviter les
blessures possibles, lisez, comprenez et suivez tous
les avertissements, toutes les précautions de sécurité
et toutes les consignes avant d’utiliser le matériel.
Composez le + 603-298-5711 ou votre distributeur
local si vous avez des questions.
1.04 Note, Attention et
Avertissement
Dans ce manuel, les mots “note,” “attention,” et
“avertissement” sont utilisés pour mettre en relief des
informations à caractère important. Ces mises en relief
sont classifiées comme suit :
FUMÉE et GAZ
NOTE
La fumée et les gaz produits par le procédé de jet de
plasma peuvent présenter des risques et des dangers de
santé.
Toute opération, procédure ou renseignement
général sur lequel il importe d’insister davantage
ou qui contribue à l’efficacité de fonctionnement
du système.
• Eloignez toute fumée et gaz de votre zone de respiration. Gardez votre tête hors de la plume de fumée
provenant du chalumeau.
ATTENTION
• Utilisez un appareil respiratoire à alimentation en
air si l’aération fournie ne permet pas d’éliminer la
fumée et les gaz.
Toute procédure pouvant résulter
l’endommagement du matériel en cas de nonrespect de la procédure en question.
Date: 6/22/99
3
GENERAL INFORMATION
• Les sortes de gaz et de fumée provenant de l’arc de
plasma dépendent du genre de métal utilisé, des
revêtements se trouvant sur le métal et des différents
procédés. Vous devez prendre soin lorsque vous
coupez ou soudez tout métal pouvant contenir un
ou plusieurs des éléments suivants:
antimoine
cadmium
mercure
argent
chrome
nickel
arsenic
cobalt
plomb
baryum
cuivre
sélénium
béryllium
manganèse
vanadium
INCENDIE ET EXPLOSION
Les incendies et les explosions peuvent résulter des scories
chaudes, des étincelles ou de l’arc de plasma. Le procédé
à l’arc de plasma produit du métal, des étincelles, des
scories chaudes pouvant mettre le feu aux matières combustibles ou provoquer l’explosion de fumées
inflammables.
• Soyez certain qu’aucune matière combustible ou inflammable ne se trouve sur le lieu de travail.
Protégez toute telle matière qu’il est impossible de
retirer de la zone de travail.
• Lisez toujours les fiches de données sur la sécurité
des matières (sigle américain “MSDS”); celles-ci
devraient être fournies avec le matériel que vous
utilisez. Les MSDS contiennent des renseignements
quant à la quantité et la nature de la fumée et des
gaz pouvant poser des dangers de santé.
• Procurez une bonne aération de toutes les fumées
inflammables ou explosives.
• Ne coupez pas et ne soudez pas les conteneurs ayant
pu renfermer des matières combustibles.
• Pour des informations sur la manière de tester la
fumée et les gaz de votre lieu de travail, consultez
l’article 1 et les documents cités à la page 5.
• Prévoyez une veille d’incendie lors de tout travail
dans une zone présentant des dangers d’incendie.
• Utilisez un équipement spécial tel que des tables de
coupe à débit d’eau ou à courant descendant pour
capter la fumée et les gaz.
• Le gas hydrogène peut se former ou s’accumuler
sous les pièces de travail en aluminium lorsqu’elles
sont coupées sous l’eau ou sur une table d’eau. NE
PAS couper les alliages en aluminium sous l’eau ou
sur une table d’eau à moins que le gas hydrogène
peut s’échapper ou se dissiper. Le gas hydrogène
accumulé explosera si enflammé.
• N’utilisez pas le chalumeau au jet de plasma dans
une zone où se trouvent des matières ou des gaz
combustibles ou explosifs.
• Le phosgène, un gaz toxique, est généré par la fumée
provenant des solvants et des produits de nettoyage
chlorés. Eliminez toute source de telle fumée.
RAYONS D’ARC DE PLASMA
CHOC ELECTRIQUE
Les rayons provenant de l’arc de plasma peuvent blesser
vos yeux et brûler votre peau. Le procédé à l’arc de plasma
produit une lumière infra-rouge et des rayons ultra-violets très forts. Ces rayons d’arc nuiront à vos yeux et
brûleront votre peau si vous ne vous protégez pas
correctement.
Les chocs électriques peuvent blesser ou même tuer. Le
procédé au jet de plasma requiert et produit de l’énergie
électrique haute tension. Cette énergie électrique peut
produire des chocs graves, voire mortels, pour l’opérateur
et les autres personnes sur le lieu de travail.
• Pour protéger vos yeux, portez toujours un casque
ou un écran de soudeur. Portez toujours des lunettes
de sécurité munies de parois latérales ou des lunettes de protection ou une autre sorte de protection oculaire.
• Ne touchez jamais une pièce “sous tension” ou
“vive”; portez des gants et des vêtements secs.
Isolez-vous de la pièce de travail ou des autres parties du circuit de soudage.
• Portez des gants de soudeur et un vêtement
protecteur approprié pour protéger votre peau
contre les étincelles et les rayons de l’arc.
• Réparez ou remplacez toute pièce usée ou
endommagée.
• Prenez des soins particuliers lorsque la zone de travail est humide ou moite.
• Maintenez votre casque et vos lunettes de protection en bon état. Remplacez toute lentille sale ou
comportant fissure ou rognure.
• Montez et maintenez le matériel conformément au
Code électrique national des Etats-Unis. (Voir la
page 5, article 9.)
• Protégez les autres personnes se trouvant sur la zone
de travail contre les rayons de l’arc en fournissant
des cabines ou des écrans de protection.
• Débranchez l’alimentation électrique avant tout travail d’entretien ou de réparation.
• Lisez et respectez toutes les consignes du Manuel
de consignes.
GENERAL INFORMATION
4
Date 6/22/99
• Utilisez la nuance de lentille qui est suggèrée dans
le recommendation qui suivent ANSI/ASC Z49.1:
Courant Arc
Nuance Minimum
Protective Numéro
Nuance Suggerée
Numéro
Moins de 300*
8
9
300 - 400*
9
12
400 - 800*
10
14
4. Norme ANSI Z87.1, PRATIQUES SURES POUR LA
PROTECTION DES YEUX ET DU VISAGE AU
TRAVAIL ET DANS LES ECOLES, disponible de
l’Institut Américain des Normes Nationales (American National Standards Institute), 1430 Broadway,
New York, NY 10018
* Ces valeurs s’appliquent ou l’arc actuel est observé
clairement. L’experience a démontrer que les filtres
moins foncés peuvent être utilisés quand l’arc est
caché par moiceau de travail.
BRUIT
5.
Norme ANSI Z41.1, NORMES POUR LES
CHAUSSURES PROTECTRICES, disponible auprès
de l’American National Standards Institute, 1430
Broadway, New York, NY 10018
6.
Norme ANSI Z49.2, PRÉVENTION DES
INCENDIES LORS DE L’EMPLOI DE PROCÉDÉS
DE COUPE ET DE SOUDAGE, disponible auprès
de l’American National Standards Institute, 1430
Broadway, New York, NY 10018
7. Norme A6.0 de l’Association Américaine du
Soudage (AWS), LE SOUDAGE ET LA COUPE DE
CONTENEURS AYANT RENFERMÉ DES
PRODUITS COMBUSTIBLES, disponible auprès de
la American Welding Society, 550 N.W. LeJeune Rd.,
Miami, FL 33126
Le bruit peut provoquer une perte permanente de l’ouïe.
Les procédés de soudage à l’arc de plasma peuvent
provoquer des niveaux sonores supérieurs aux limites
normalement acceptables. Vous dú4ez vous protéger les
oreilles contre les bruits forts afin d’éviter une perte
permanente de l’ouïe.
8. Norme 51 de l’Association Américaine pour la Protection contre les Incendies (NFPA), LES SYSTEMES
À GAZ AVEC ALIMENTATION EN OXYGENE
POUR LE SOUDAGE, LA COUPE ET LES
PROCÉDÉS ASSOCIÉS, disponible auprès de la
National Fire Protection Association, Batterymarch
Park, Quincy, MA 02269
• Pour protéger votre ouïe contre les bruits forts, portez
des tampons protecteurs et/ou des protections
auriculaires. Protégez également les autres
personnes se trouvant sur le lieu de travail.
• Il faut mesurer les niveaux sonores afin d’assurer
que les décibels (le bruit) ne dépassent pas les
niveaux sûrs.
9. Norme 70 de la NFPA, CODE ELECTRIQUE NATIONAL, disponible auprès de la National Fire Protection Association, Batterymarch Park, Quincy, MA
02269
• Pour des renseignements sur la manière de tester le
bruit, consultez l’article 1, page 5.
1.06 Documents De Reference
10. Norme 51B de la NFPA, LES PROCÉDÉS DE
COUPE ET DE SOUDAGE, disponible auprès de
la National Fire Protection Association,
Batterymarch Park, Quincy, MA 02269
Consultez les normes suivantes ou les révisions les plus
récentes ayant été faites à celles-ci pour de plus amples
renseignements :
1. OSHA, NORMES DE SÉCURITÉ DU TRAVAIL ET
DE PROTECTION DE LA SANTÉ, 29CFR 1910,
disponible auprès du Superintendent of Documents, U.S. Government Printing Office, Washington, D.C. 20402
11. Brochure GCA P-1, LA MANIPULATION SANS
RISQUE DES GAZ COMPRIMÉS EN CYLINDRES,
disponible auprès de l’Association des Gaz
Comprimés (Compressed Gas Association), 1235
Jefferson Davis Highway, Suite 501, Arlington, VA
22202
2. Norme ANSI Z49.1, LA SÉCURITÉ DES
OPÉRATIONS DE COUPE ET DE SOUDAGE,
disponible auprès de la Société Américaine de
Soudage (American Welding Society), 550 N.W.
LeJeune Rd., Miami, FL 33126
12. Norme CSA W117.2, CODE DE SÉCURITÉ POUR
LE SOUDAGE ET LA COUPE, disponible auprès
de l’Association des Normes Canadiennes, Standards Sales, 178 Rexdale Boulevard, Rexdale,
Ontario, Canada, M9W 1R3
3. NIOSH, LA SÉCURITÉ ET LA SANTÉ LORS DES
OPÉRATIONS DE COUPE ET DE SOUDAGE À
L’ARC ET AU GAZ, disponible auprès du Superintendent of Documents, U.S. Government Printing
Office, Washington, D.C. 20402
13. ivret NWSA, BIBLIOGRAPHIE SUR LA SÉCURITÉ
DU SOUDAGE, disponible auprès de l’Association
Nationale de Fournitures de Soudage (National
Welding Supply Association), 1900 Arch Street,
Philadelphia, PA 19103
Date: 6/22/99
5
GENERAL INFORMATION
14. Norme AWSF4.1 de l’Association Américaine de
Soudage, RECOMMANDATIONS DE PRATIQUES SURES POUR LA PRÉPARATION À LA
COUPE ET AU SOUDAGE DE CONTENEURS
ET TUYAUX AYANT RENFERMÉ DES
PRODUITS DANGEREUX , disponible auprès de
la American Welding Society, 550 N.W. LeJeune
Rd., Miami, FL 33126
15. Norme ANSI Z88.2, PRATIQUES DE PROTECTION RESPIRATOIRE, disponible auprès de
l’American National Standards Institute, 1430
Broadway, New York, NY 10018
GENERAL INFORMATION
6
Date 6/22/99
1.07 Declaration of Conformity
Manufacturer: Thermal Dynamics Corporation
Address:
Industrial Park #2
West Lebanon, New Hampshire 03784
USA
The equipment described in this manual conforms to all applicable aspects and regulations of the ‘Low Voltage Directive’ (European Council Directive 73/23/EEC as amended by Council Directive 93/68/EEC) and to the National
legislation for the enforcement of this Directive.
Serial numbers are unique with each individual piece of equipment and details description, parts used to manufacture
a unit and date of manufacture.
National Standard and Technical Specifications
The product is designed and manufactured to a number of standards and technical requirements among them are:
* CSA (Canadian Standards Association) standard C22.2 number 60 for Arc welding equipment.
* UL (Underwriters Laboratory) rating 94VO flammability testing for all printed-circuit boards used.
* ISO/IEC 60974-1 (BS 638-PT10) (EN 60 974-1) (EN50192) (EN50078) applicable to plasma cutting equipment and associated accessories.
* Extensive product design verification is conducted at the manufacturing facility as part of the routine design and
manufacturing process. This is to ensure the product is safe, when used according to instructions in this manual and
related industry standards, and performs as specified. Rigorous testing is incorporated into the manufacturing
process to ensure the manufactured product meets or exceeds all design specifications.
Thermal Dynamics has been manufacturing products for more than 30 years, and will continue to achieve excellence in our
area of manufacture.
Manufacturers responsible representative:
Date: 6/22/99
Steve Ward
Director of Operations
Thermadyne UK
Chorley England
7
GENERAL INFORMATION
1.08 Statement of Warranty
LIMITED WARRANTY: Thermal Dynamics® Corporation (hereinafter “Thermal”) warrants that its products will be free of defects in
workmanship or material. Should any failure to conform to this warranty appear within the time period applicable to the Thermal
products as stated below, Thermal shall, upon notification thereof and substantiation that the product has been stored, installed, operated,
and maintained in accordance with Thermal’s specifications, instructions, recommendations and recognized standard industry practice,
and not subject to misuse, repair, neglect, alteration, or accident, correct such defects by suitable repair or replacement, at Thermal’s sole
option, of any components or parts of the product determined by Thermal to be defective.
THIS WARRANTY IS EXCLUSIVE AND IS IN LIEU OF ANY WARRANTY OF MERCHANTABILITY OR FITNESS FOR A
PARTICULAR PURPOSE.
LIMITATION OF LIABILITY: Thermal shall not under any circumstances be liable for special or consequential damages, such as, but
not limited to, damage or loss of purchased or replacement goods, or claims of customers of distributor (hereinafter “Purchaser”) for
service interruption. The remedies of the Purchaser set forth herein are exclusive and the liability of Thermal with respect to any
contract, or anything done in connection therewith such as the performance or breach thereof, or from the manufacture, sale, delivery,
resale, or use of any goods covered by or furnished by Thermal whether arising out of contract, negligence, strict tort, or under any
warranty, or otherwise, shall not, except as expressly provided herein, exceed the price of the goods upon which such liability is based.
THIS WARRANTY BECOMES INVALID IF REPLACEMENT PARTS OR ACCESSORIES ARE USED WHICH MAY IMPAIR THE
SAFETY OR PERFORMANCE OF ANY THERMAL PRODUCT.
THIS WARRANTY IS INVALID IF THE PRODUCT IS SOLD BY NON-AUTHORIZED PERSONS.
The limited warranty periods for Thermal products shall be as follows (with the exception of XL Plus Series, CutMaster 80XL , Cougar
and DRAG-GUN): A maximum of three (3) years from date of sale to an authorized distributor and a maximum of two (2) years from
date of sale by such distributor to the Purchaser, and with the further limitations on such two (2) year period (see chart below).
The limited warranty period for XL Plus Series and CutMaster 80XL shall be as follows: A maximum of four (4) years from date
of sale to an authorized distributor and a maximum of three (3) years from date of sale by such distributor to the Purchaser, and
with the further limitations on such three (3) year period (see chart below).
The limited warranty period for Cougar and DRAG-GUN shall be as follows: A maximum of two (2) years from date of sale to an
authorized distributor and a maximum of one (1) year from date of sale by such distributor to the Purchaser, and with the further
limitations on such two (2) year period (see chart below).
Parts
PAK Units, Power Supplies
XL Plus Series &
CutMaster 80XL
Parts
Cougar/Drag-Gun
Parts
All Others
Labor
Main Power Magnetics
3 Years
1 Year
2 Years
1 Year
Original Main Power Rectifier
3 Years
1 Year
2 Years
1 Year
Control PC Board
3 Years
1 Year
2 Years
1 Year
All Other Circuits And Components Including,
But Not Limited To, Starting Circuit,
Contactors, Relays, Solenoids, Pumps,
Power Switching Semi-Conductors
1 Year
1 Year
1 Year
1 Year
1 Year
1 Year
1 Year
1 Year
Consoles, Control Equipment, Heat
Exchanges, And Accessory Equipment
1 Year
Torch And Leads
Maximizer 300 Torch
All Other Torches
Repair/Replacement Parts
180 Days
180 Days
180 Days
180 Days
90 Days
90 Days
90 Days
None
Warranty repairs or replacement claims under this limited warranty must be submitted by an authorized Thermal Dynamics® repair
facility within thirty (30) days of the repair. No transportation costs of any kind will be paid under this warranty. Transportation
charges to send products to an authorized warranty repair facility shall be the responsibility of the customer. All returned goods shall
be at the customer’s risk and expense. This warranty supersedes all previous Thermal warranties.
Effective May 6, 1999
GENERAL INFORMATION
8
Date 6/22/99
SECTION 2:
INTRODUCTION
2.01 Scope Of Manual
This Manual provides Service Instructions for Thermal
Dynamics PAK Master® 75XL PLUS Air Plasma Power
Supply.
Refer to Operating Manual 0-2746 for individual operating procedures. Information in this edition is therefore
particularly applicable to the Troubleshooting and Repair
of the equipment, and is intended for use by properlytrained Service Technicians familiar with this equipment.
2.03 Service Responsibilities
The service technician should be familiar with the equipment and its capabilities. The technician should be prepared to recommend arrangements of components which
will provide the most efficient layout, utilizing the equipment to its best possible advantage.
Maintenance work should be accomplished in a timely
manner. If problems are encountered, or the equipment
does not function as specified, contact the Technical Services Department at West Lebanon for assistance.
Read this Manual and the Operating Manual 0-2746, thoroughly. A complete understanding of the capabilities and
functions of the equipment will assure obtaining the performance for which it was designed.
2.02 General Service Philosophy
Several key points are essential to properly support the
application and operation of this equipment.
A. Application
The equipment should satisfy the customer’s requirements as supplied and as described in Section 3 of this
manual. Be sure to confirm that the equipment is capable
of the application desired.
B. Modifications
No physical or electrical modifications other than selection of standard options and accessories are to be made
to this equipment.
C. Customer/Operator Responsibilities
It is the customer/operator's responsibility to maintain
the equipment and peripheral Accessories provided by
Thermal Dynamics in good operating order in accordance
with the procedures outlined in the Operating Manual,
and to protect the equipment from accidental or malicious damage.
D. Repair Restrictions
The electronics consists of Printed Circuit Board Assemblies which must be carefully handled, and must be replaced as units. No replacement of printed circuit solder-mounted components is allowed except as noted in
this manual.
If to be returned, the replaced Printed Circuit Board Assemblies must be properly packaged in protective material and returned intact per normal procedures.
Manual 0-2747
9
SECTION 1: INTRODUCTION
SECTION 1: INTRODUCTION
10
Manual 0-2747
SECTION 3:
DESCRIPTION
3.03 Specifications/Design Features
A. Power Supply Technical Specifications
The following specifications apply to the Power Supply
only:
3.01 Scope
The purpose of the information in this section is:
1. Front Panel Controls
ON/OFF Switch, RUN/SET/LATCH Switch and
Output Current Control
• To familiarize the service technician with the capabilities and limitations of the equipment
• To provide an overall understanding which will allow the technician, in turn, to properly train
customer's operating personnel.
3.02 General Description of System
The 75XL PLUS System includes a power supply and
PCH/M-60 torch & leads. The power supply provides
60 amp maximum output and includes all control circuitry, electrical and gas inputs and outputs, pilot circuitry, torch leads receptacle and a work cable with clamp.
208/230V single-phase units include 50 amp input cable
and plug.
2. Front Panel LED Indicators
AC, TEMP, GAS, DC
3. Rear Panel
Input Power Cable Strain Relief*, Gas Connection, Gas
Regulator/Filter Assembly
*208/230V single-phase units also include 50 amp input
cable and plug.
4. Input Power
Can be configured for the following input power:
208/230/240 VAC (±10%), 50/60 Hz, Single or ThreePhase
NOTE
The power supply can be ordered in various configurations with various options factory installed.
380/415 VAC (±10%), 50/60 Hz, Three-Phase
460 VAC (±10%), 50/60 Hz, Single or Three-Phase
5. Output Power
XL PLUS Power Supply
Continuously variable from 15 to 60 Amps maximum
6. Duty Cycle
65% Duty Cycle @ an output of 104VDC/60 Amps
100% Duty Cycle @ an output of 104VDC/ 50 Amps
7. Cut Capacity (Mild Steel)
3/4 inch (19.1 mm); 1 inch (25.4 mm) severance
A-02462
Torch and Leads
8. Pilot Circuitry
Work Cable and Clamp
Capacitive Discharge (CD), Pulsed DC
The PCH/M-60 torch provides a maximum 3/4 inch (19.1
mm) cut capacity. The hand torch is available in 70° and
90° head configurations and a machine torch in a 180°
head configuration. Torch leads are available in 25 ft (7.6
m), or 50 ft (15.2 m) lengths with fittings for simple installation. Spare Parts Kits are available which provide
an assortment of replacement torch parts.
9. Weight
64 lbs (29 kg) w/work lead
71 lbs (32 kg) w/work lead and 25' Torch & Lead
10. Overall Dimensions
19" (482 mm) High x 13" (330 mm) Wide x 24.8" (63
m) Long
NOTE
Refer to Section 3.04 for list of power supply options and accessories.
Manual 0-2747
11
SECTION 3: DESCRIPTION
Overall dimensions are with Handle, Lead Wrap
Bracket, and Gas Regulator/Filter Assembly installed.
D. Smart Cart
Steel cart on easy rolling 10" pneumatic tires to provide maximum mobility for the power supply. Handle
is 3/4" tubing with hooks for storage of torch leads.
A tie down strap is also included.
B. Gas Regulator/Filter Assembly
Specifications
The following specifications apply to the Gas Regulator/
Filter Assembly only:
E. 575V Transformer
1. Gas regulator maximum gauge pressure
This step-down transformer allows the power supply to operate with 575 VAC three-phase input power.
160 psi (11 bar)
2. Maximum input gas pressure
F. Computer Control Cable (CNC)
NOTE
125 psi (8.6 bar)
This accessory is for use with PCM-60 Torches.
3. Filter
This interface cable is available in two lengths, 25 ft
(7.6 m) and 50 ft (15.2 m). The cable is used to interface the power supply with an auxiliary control device to provide OK-To-Move and ON/OFF signals.
Coalescent type filter
3.04 Power Supply Options and
Accessories
NOTE
Refer to Section 6, Parts Lists, for part numbers
and ordering information.
The following are accessories that are available for this
power supply:
G. Cutting Guide Kit
Easy add-on attachments to allow for straight line, circle,
or bevel cutting.
H. Standoff Cutting Guide
Simple, push-on guide attachment to allow for torch dragging without risk of touching tip.
A. Dry Air Filter Kit
An optional in-line filter for use on compressed air
shop systems. Filters moisture and particulate matter from the air stream to at least .85 microns.
B. Two Stage Air Line Filter
An optional two stage air line filter is available. The
filter will remove moisture and contaminants from the
air stream when using compressed air. The filter is
capable of filtering to at least 5.0 microns. The filter
assembly is pre-assembled at the factory and need
only be attached to the power supply.
C. High Pressure Regulators
High pressure regulators are available for air and nitrogen. The regulators are used to set the proper pressure for the type gas being used.
SECTION 3: DESCRIPTION
12
Manual 0-2747
SECTION 4:
SERVICE
TROUBLESHOOTING
DIAGNOSTICS
CAUTION
Sparks from the cutting process can cause damage
to coated, painted, and other surfaces such as glass,
plastic and metal.
NOTE
Handle torch leads with care and protect them from
damage.
4.01 Introduction
This section provides service diagnostics for the Pak
Master 75XL PLUS Power Supply, allowing the Technician to isolate any faulty Subassemblies. Refer to Section
5, Repairs & Replacement Procedures, for parts replacement instructions.
Under no circumstances are field repairs to be attempted
on Printed Circuit Boards or other Subassemblies of this
unit. Evidence of unauthorized repairs will void the factory warranty.
A. Piloting
Piloting is harder on parts life than actual cutting because the pilot arc is directed from the electrode to
the tip rather than to a workpiece. Whenever possible,
avoid excessive pilot arc time to improve parts life.
B. Torch Standoff
Improper standoff (the distance between the torch tip
and workpiece) can adversely affect tip life as well as
shield cup life. Standoff may also significantly affect
the bevel angle. Reducing standoff generally results
in a more square cut.
NOTE
The troubleshooting contained in this manual is
for the Power Supply only. Troubleshooting other
parts of the system is covered in the separate manuals for that product.
C. Edge Starting
For edge starts, hold the torch perpendicular to the
workpiece with the front of the torch tip at the edge
of the workpiece, not touching, at the point where the
cut is to start. When starting at the edge of the plate,
do not pause at the edge and force the arc to “reach”
for the edge of the metal. Establish the cutting arc as
quickly as possible.
4.02 Periodic Inspection &
Procedures
This subsection describes inspection procedures which
should be performed at periodic intervals as required.
A. Physical Inspection
D. Direction of Cut
Check that all cable connections are secure.
The plasma gas stream swirls as it leaves the torch.
The purpose of the swirl is to maintain a smooth column of gas. The swirl effect results in one side of a
cut being more square than the other. Viewed along
the direction of travel, the right side of the cut is more
square than the left.
B. Cleaning
Unit should be cleaned as described in Operating
Manual 0-2746.
4.03 Common Operating Problems
E. Dross
When dross is present on carbon steel, it is commonly
referred to as either “high speed, slow speed, or top
dross”. Dross present on top of the plate is normally
caused by too great a torch to plate distance. "Top
dross" is normally very easy to remove and can often
be wiped off with a welding glove. "Slow speed dross"
is normally present on the bottom edge of the plate.
It can vary from a light to heavy bead, but does not
adhere tightly to the cut edge, and can be easily
scraped off. "High speed dross" usually forms a narrow bead along the bottom of the cut edge and is very
difficult to remove. When cutting a troublesome steel,
WARNINGS
Disconnect primary power at the source before disassembling the power supply, torch, or torch leads.
Frequently review the Important Safety Precautions (page 1). Be sure the operator is equipped
with proper gloves, clothing, eye and ear protection. Make sure no part of the operator’s body comes
into contact with the workpiece while the torch is
activated.
Manual 0-2747
13
SECTION 4: SERVICE TROUBLESHOOTING
it is sometimes useful to reduce the cutting speed to
produce "slow speed dross". Any resultant cleanup
can be accomplished by scraping, not grinding.
4.04 Troubleshooting Guide General Information
F. Common Cutting Faults
WARNING
1. Insufficient Penetration
a. Cutting speed too fast
There are extremely dangerous voltage and power
levels present inside this unit. Do not attempt to
diagnose or repair unless you have had training in
power electronics measurement and troubleshooting techniques.
b. Torch tilted too much
c. Metal too thick
d. Worn torch parts
e. Cutting current too low
2. Main Arc Extinguishes
A. Troubleshooting and Repair
b. Torch standoff too high from workpiece
Troubleshooting and repair of this unit is a process which
should be undertaken only by those familiar with high
voltage high power electronic equipment.
c. Cutting current too high
B. Advanced Troubleshooting
a. Cutting speed too slow
d. Work cable disconnected
NOTE
e. Worn torch parts
3. Excessive Dross Formation
For basic troubleshooting and parts replacement
procedures refer to Pak Master 75XL PLUS Operating Manual 0-2746.
a. Cutting speed too slow
b. Torch standoff too high from workpiece
c. Worn torch parts
d. Improper cutting current
4. Short Torch Parts Life
a. Moisture in air source
b. Exceeding system capability (material too thick)
c. Excessive pilot arc time
The advanced troubleshooting covered in this Service
Manual requires Power Supply disassembly and live measurements. It is helpful for solving many of the common
problems that can arise with the Pak Master 75XL PLUS
Power Supply.
If major complex subassemblies are faulty, the faulty subassembly must be returned for repair.
NOTE
d. Air flow too low (incorrect pressure)
Follow all instructions as listed and complete each
in the order presented.
e. Improperly assembled torch
f. Incorrect torch parts for the operation
g. Non-Genuine Thermal Dynamics parts used
Subsection 4.09 includes specific test procedures and LED
status identification tables. The subsection is referenced
by the troubleshooting guide for the specific test to be
performed.
The troubleshooting guide has six sub-sections as follows:
Section 4.05 - Circuit Fault Isolation
Section 4.06 - Main Input and Internal Power Problems
Section 4.07 - Pilot Arc Problems
Section 4.08 - Main Arc Problems
Section 4.09 - Test Procedures
SECTION 4: SERVICE TROUBLESHOOTING
14
Manual 0-2747
C. How to use the Troubleshooting Guide
3. Set the Power Supply controls as follows:
The following information is a guide to help the Service
Technician determine the most likely causes for various
symptoms. This guide is set up in the following manner:
ON/OFF switch to OFF
1. Perform operational check(s) on the equipment to isolate problem to possible circuit(s) per Section 4.05,
Circuit Fault Isolation.
CURRENT control potentiometer to maximum
2. Determine symptom and isolate to defective assembly
using the following format:
X. Symptom (Bold Type)
RUN/SET/LATCH switch to SET
B. Main Input and Internal Power Tests
1. Connect main AC power to the unit.
2. Set the Power Supply ON/OFF switch to ON and note
the following:
• AC indicator blinks for six seconds, then steady
ON
Any Special Instructions (Text Type)
1. Cause (Italic Type)
• Relay K10 on Input PC Board energizes (clicks)
before AC indicator stops blinking
a. Check/Remedy (Text Type)
• Relay K11 energizes pulling in MC1 after AC light
stays blinking
3. Locate your symptom in the appropriate Subsection.
4. Check the causes (easiest listed first) for the symptom.
• TEMP indicator OFF
5. Check the remedies listed for each cause.
• GAS indicator ON
6. Repair as needed being sure to verify that unit is fully
operational after any repairs.
• Gas flows
• Fans will operate
NOTES
Many signals are transferred between Printed Circuit Board Assemblies on Ribbon Cables. If these
cables become faulty they can then cause various
problems. Do not forget about these cables when
troubleshooting.
While troubleshooting visually inspect the internal components for signs of over heating, fractures
and damage.
4.05 Circuit Fault Isolation
NOTE
Follow all instructions as listed and complete each
in the order presented.
This section is to help isolate the defective circuit before
troubleshooting, identify symptoms, and test the unit for
proper operation. Follow the instructions as given to identify the possible symptom(s) and the defective circuit.
After repairs are complete then run the following tests
again to verify that the unit is fully operational.
• DC lndicator is OFF
3. Set the Power Supply RUN/SET/LATCH switch to
the RUN position and note the following:
• Gas indicator goes OFF
• Gas flow stops
This completes the Main Input and Internal Power Tests.
If the above are all correct then proceed to paragraph 'C'.
If the above does not function as noted then note the
symptom and proceed to Section 4.06, Main Input and
Internal Power Problems.
C. Pilot Arc Test
1. Press the torch switch to establish a pilot arc and note
the following:
• Gas flows
• GAS indicator turns ON
• After preflow delay DC indicator turns ON
• Pilot arc established
A. Initial Setup Conditions
1. Connect gas supply to rear of Power Supply
2. Turn on gas supply and adjust Power Supply Gas Regulator to 60 psi (4.1 bar).
Manual 0-2747
This completes the Pilot Arc Test. If the above are all correct then proceed to paragraph 'D'.
If the above does not function as noted then note the
symptom and proceed to Section 4.07, Pilot Arc Problems.
15
SECTION 4: SERVICE TROUBLESHOOTING
a. Close main power disconnect
D. Main Arc Test
3. Main power line fuses blown
Press the Torch Switch to establish a pilot arc.
a. Replace main power line Fuses
Bring the torch to within 1/8"-3/8" (3.2 - 9.5 mm) of the
workpiece to establish the main cutting arc, and note the
following:
4. Defective input power cable
a. Replace input power cable
• Main cutting arc initiates
5. Improper input power line connections inside Power
Supply
• Pilot Relay opens
This completes the Main Arc Test. If the above are all
correct then the equipment should be operating properly.
If problems still persist then contact Technical Services.
a. Refer to Operating Manual 0-2746, Section 3.07
and correct if needed
6. Fuse blown inside Power Supply
If the above does not function as noted then note the
symptom and proceed to Section 4.08, Main Arc Problems.
a. Replace internal Fuse (1 FU)
7. Line voltage above 10% tolerance (overvoltage protection)
4.06 Main Input and Internal Power
Problems
a. Reduce line supply.
8. Faulty Auxiliary Transformer (refer to Appendix XI,
36 VAC Circuit Diagram)
Locate your symptom below:
A. Main power line fuses blow as soon as main
disconnect is closed
Measure for 36 VAC on Logic/Gate PC Board from
J1-1 to J1-5.
1. Input power cable installed incorrectly
a. If voltage is not present, replace the Auxiliary
Transformer
a. Refer to Operating Manual 0-2746, Section 3.07
and connect input cable
9. Faulty Logic/Gate PC Board (refer to Appendix XI, 36
VAC Circuit Diagram)
B. Main Power line fuses blow when unit is powered
on
Measure for 36 VAC on Logic/Gate PC Board from
J3-1 to J3-3.
1. Input voltage selection incorrect for the main input voltage
a. If voltage is not present, replace the Logic/Gate
PC Board
a. Refer to Operating Manual 0-2746, Section 3.06
and select proper input voltage
10. Faulty ON/OFF switch (refer to Appendix X, 36 VAC
Circuit Diagram)
2. Single phase jumper wire installed incorrectly
Measure for 36vac on the Logic/Gate PC Board
between J3-2 to J3-4.
a. Refer to Operating Manual 0-2746, Section 3.07
and check jumper wire installation
a. If voltage is not present replace the ON/OFF
switch
3. Faulty Input Bridge
a. Test Input Bridge per Section 4.09-D; repair as
necessary
11. Faulty ribbon cable
Refer to Appendix X, 36 VAC Circuit Diagram and
check for continuity on the pins.
4. FET/Heatsink Assembly faulty
a. Check per Section 4.09-I; repair as necessary
a. If any line between pins is open, replace the
ribbon cable
C. AC indicator on front panel of power supply is
OFF, fan does not operate
1. Front Panel ON/OFF switch in OFF position
a. Place switch to ON position
b. If voltage is present, replace Logic/Gate PCB.
C. AC indicator ON, TEMP indicator ON, System
will not pilot
2. Main power disconnect not closed
SECTION 4: SERVICE TROUBLESHOOTING
1. Air flow through unit is restricted
16
Manual 0-2747
a. Provide adequate air flow (Refer to Operating
Manual 0-2746, Section 3.02)
a. If 12vdc and pressure is above 50 PSI, replace
gas pressure switch.
2. Exceeded duty cycle of Power Supply
Rear Panel
a. Wait for fans to cool unit and refer to Operating
Manual 0-2746, Section 2.03, for proper Duty
Cycle
3. Faulty Fan or Logic/Gate PC Board
Gas Solenoid
Measure for 115 VAC on the Logic/Gate PC Board
from J2-2 to J2-8 and J2-3 to J2-9.
• If voltage is correct, replace Fan Assembly
Gas Pressure Switch
• If voltage is incorrect, replace Logic/Gate PC
Board
Wire #51
4. Faulty temperature circuit
a. Check temperature circuit per Section 4.09-F;
repair as necessary
Wire #50
D. AC indicator ON; TEMP indicator OFF; No gas
flow; GAS and DC indicators OFF
A-01184
5. Faulty Wiring or Logic/Gate PC Board
1. RUN/SET/LATCH switch in RUN (or LATCH) position
Check for DC voltage from Logic/Gate PC Board
J2-13 to TP1 (GND)
a. Switch to SET position
• If less than a volt, replace Logic/Gate PC Board
2. Gas supply not connected to unit
a. Connect to gas supply
TP1 (GND)
3. Gas supply not turned on
a. Turn gas supply on
4. Faulty RUN/SET/LATCH switch
a. Check continuity
5. Faulty gas solenoid circuit
a. Test gas solenoid circuit per Section 4.09-G; repair as necessary
E. AC indicator ON; GAS indicator OFF; Gas flows;
DC indicator OFF
1. Gas pressure too low
a. See torch manual for operating pressures
Logic/Gate PC Board
G. AC indicator ON; Gas flows; GAS and DC
indicators ON; Arc in torch without pressing
torch switch
2. Faulty pressure switch
1. Faulty torch switch
Measure for DC voltage from wire #51 to wire #50
at the gas pressure switch at the rear of the Rear
Panel Assembly.
Manual 0-2747
A-02546
J2
a. Refer to appropriate Torch Instruction Manual
and check continuity
17
SECTION 4: SERVICE TROUBLESHOOTING
2. Faulty torch leads
J5
a. Refer to appropriate Torch Instruction Manual
and check continuity
3. Faulty Pilot PC Board
Remove power from power supply. Disconnect
J12 and J13 from the Pilot PC Board.
Check for an open between J12 pin 1 to J12 pin 3
on the Pilot Output PC Board.
a. Replace Pilot Output PC Board if continuity is
present
Logic/Gate PC Board
A-02547
J2
Pilot Output PC Board
4.07 Pilot Arc Problems
Top
Locate your symptom below:
A. AC indicator ON; TEMP indicator off; No gas
flow; GAS and DC indicators OFF (Torch Switch
must be pressed)
J12
A-01399
1. Faulty RUN/SET/LATCH switch
a. Check switch and replace if necessary
2. Faulty hand torch parts or Logic/Gate PC Board
Check start indicator D1 on thevLogic/Gate PC
Board
Pin 3
a. If start indicator D1 is ON, replace Logic/Gate
PCB.
Pin 1
b. If start indicator D1 on Logic/Gate PC Board is
OFF check the following:
Check Pilot/Output PC Board for 12VDC between
J12 pin 1 and pin 3 with torch switch pressed.
4. Faulty Logic/Gate or Pilot PC Board
Check for DC voltage from Logic/Gate PC Board
J5 pin 8 to J5 pin 9.
• If voltage is correct, check Torch Switch and
PIP as needed per appropriate torch manual.
a. Replace Logic/Gate PC Board if voltage is approximately 12 VDC.
• If voltage is incorrect, replace Logic/Gate
PC Board
D1
D2
J5
A-02548
Logic/Gate PC Board
J2
SECTION 4: SERVICE TROUBLESHOOTING
18
Manual 0-2747
B. AC indicator ON; TEMP indicator off; Gas flows;
GAS indicator ON; DC indicator blinks; Small
arc may be visible in torch
1. Faulty Pilot Output PC Board or Shorted Torch
D. AC indicator ON; TEMP indicator off; Gas flows;
GAS and DC indicators ON; Spark at gap on CD
PC Board and CD enable indicator (D2) on Logic/
Gate PC Board ON; No arc or intermittent arc in
torch
a. Test per Section 4.09-H; repair as necessary
1. Gas pressure(s) set incorrectly (too high)
2. Faulty FET/Heatsink Assembly
a. Refer to appropriate Torch Manual
a. Check per Section 4.09-I; repair as necessary
2. Oil/moisture in air lines
3. Faulty torch
a. Purge system. If problem corrected add filters
in line with air source
a. Check torch per appropriate Torch Instruction
Manual
3. Incorrect torch parts
C. AC indicator ON; TEMP indicator off; Gas flows;
GAS and DC indicators ON; No arc in torch; No
arc at spark gap on CD PC Board; CD enable
indicator (D2) ON
a. Refer to appropriate Torch Instruction Manual
4. Faulty leads
a. Check continuity per appropriate Torch Instruction Manual
1. Faulty CD PC Board
a. Test for 36VAC at J11-1 to J11-3.
5. Faulty torch
• If voltage is present, proceed to step 6.
a. Check continuity per appropriate Torch Instruction Manual
• If voltage is not present, test for voltage at J5-1
to J5-3.
6. Faulty connection of wire #16 or #17 to Pilot Output
PC Board
If no voltage is present, replace Logic/Gate
PCB.
a. Check wiring connection
b. Measure DC voltage between J11-4 to J11-5 on
CD PC Board
Pilot Output PC Board
• If voltage is less than 2 VDC replace CD PC
Board
Top
• If voltage is approximately 12VDC, replace Logic
PCB.
CD PC Board
A-01400
Pin 4
E24
Wire #16
Pin 5
A-01188
E23
Wire #17
J11
Manual 0-2747
19
SECTION 4: SERVICE TROUBLESHOOTING
7. Faulty Logic/Gate PC Board
Check D39 & D20 on the Logic/Gate Board
D20 D36
D39
A-02549
a. If D39 and D20 are not on, replace Logic/Gate
PCB.
Measure for 12 VDC on Logic/Gate PC Board from
J5-6 to J5-7.
J17
a. If voltage is greater than 2VDC, replace Logic/
Gate PC Board.
Measure for 15 VDC on Logic PC Board from J5-6
to J5-7.
Logic/Gate PC Board
Pin 1
Pin 2
4.08 Main Arc Problems
Locate your symptom below:
A. Main cutting arc will not initiate
B. When operating at amperages over 35 amps the
amperage drops off after main cutting arc initiates
Check the following indicator inside the Power Supply:
1. Work cable not connected.
a. Connect work cable.
• Drag indicator (D36) on the Logic/Gate PC
Board is ON when the torch tip comes in contact with the workpiece.
2. Faulty current sensor
Check the following indicators inside the Power
Supply:
1. Cutting tip in contact with the workpiece.
a. Maintain standoff distance 1/8"-3/8" between
cutting tip and workpiece. (See SW-1 Drag Disable)
• Pilot indicator (D39) on the Logic/Gate PC
Board is ON during pilot then OFF during main
arc transfer
2. Faulty PCR Relay
• CSR indicator (D20) on the Logic/Gate PC
Board is OFF during pilot then ON during main
arc transfer
a. With power off, measure for continuity between
wires #12 and #14. If continuity is found, replace PCR.
While trying to transfer, measure voltage at J17-1
to J17-2 on the Logic/Gate PC Board.
3. Faulty Logic/Gate PC Board
If voltage is approximately 12VDC replace the
Current Sensor
If voltage is less than 2VDC replace the Logic/
Gate PC Board.
If torch tip is off the workpiece and the drag indicator, D36, on the Logic/Gate PC Board is still ON,
then replace the Logic/Gate PC Board.
4.09 Test Procedures
The test procedures in this subsection are referenced in
the troubleshooting section.
A. Safety Precautions
1. Significant DC Voltage exists after removal of input
power. Allow 2 minutes for discharge time. Voltage
measured on input capacitors must be zero before
performing service on the power supply.
2. Do Not touch electrical components with any part of
the human body when power is applied.
3. Keep away from any moving parts.
SECTION 4: SERVICE TROUBLESHOOTING
20
Manual 0-2747
4. Hot surfaces can cause severe burns. Allow equipment to cool before servicing.
3. Remove the nut securing the ground wire to the side
panel.
5. Electrostatic discharge can damage printed circuit
board assemblies. Transport printed circuit boards in
proper anti-static shielded packages. Use proper
grounding techniques with wrist strap before handling
printed circuit boards.
4. Close the enclosure by reversing the above steps.
6. Misaligned plugs can cause printed circuit board damage. Be sure plugs are properly aligned and completely seated.
C. Diode Testing Basics
Testing of diode modules requires a digital volt/ohmmeter that has a diode test scale. Remember that even if the
diode module checks good, it may still be bad. If in doubt,
replace the diode module.
1. Locate the diode module to be tested.
7. Excessive pressure can damage printed circuit board.
Use only minimal pressure and gentle movement
when disconnecting or connecting printed circuit
board plugs.
2. Remove cables from mounting studs on diodes to isolate the module.
B. Opening Power Supply Enclosure
4. Using the Figures for each test, check each diode in the
module. Each diode must be checked in forward bias
(plus to negative) and reverse bias (negative to plus)
direction.
The left side panel of the Power Supply must be removed
to gain access to the input power connections and the
input voltage selection.
WARNING
Disconnect primary power at the source before assembling or disassembling the Power Supply, torch
parts, or torch and leads assemblies.
3. Set digital volt/ohmmeter to diode test scale.
5. Connect the volt/ohmmeter positive lead to the anode (+) of the diode and the negative lead to the cathode (-) of the diode for forward bias testing (refer to
following figure). A properly functioning diode will
conduct in the forward bias direction and indicate between 0.3 to 0.9 volts.
A-00307
1. Using a phillips head screw driver remove the five
screws which secure the left side panel (viewed from
front of unit) to the frame assembly.
0.75
Forward Bias
Diode Conducting
Left Side
Panel
Diode Test Symbol
Anode
VR COM
_
+
A
A-02564
Ground Wire
Cathode
Testing Diode Forward Bias
Screws (5 places)
2. Carefully pull the left side panel from the Power Supply a short distance (see note).
NOTE
There is a ground wire attached to the side panel.
Manual 0-2747
21
SECTION 4: SERVICE TROUBLESHOOTING
6. Reverse the meter leads across the diode for reverse
bias testing (refer to following figure). A properly
functioning diode will block in the reverse bias direction and depending on the meter function will indicate an open or “OL”.
Remove AC power and with an ohmmeter set on the diode range make the following checks:
M e t e r (+ )
M e t e r (-)
I n d ica t io n
AC 1
(-)
O pen
AC 2
(-)
O pen
AC 3
(-)
O pen
(-)
AC 1
D io d e D ro p
(-)
AC 2
D io d e D ro p
(-)
AC 3
D io d e D ro p
(+ )
AC 1
O pen
(+ )
AC 2
O pen
(+ )
AC 3
O pen
AC 1
(+ )
D io d e D ro p
AC 2
(+ )
D io d e D ro p
AC 3
(+ )
D io d e D ro p
A-00306
OL
Reverse Bias
Diode Not Conducting
VR COM
_
+
Cathode
A
Anode
Testing Diode Reverse Bias
7. If a diode checks bad, replace the diode module.
The meter should indicate a diode drop in one direction
and an open in the other direction for each check.
If Input Bridge Diode is shorted, make the following
checks with an ohmmeter at the Main Contactor:
8. Reconnect all cables to proper terminals.
M e t e r (+ )
M e t e r (-)
I n d ica t io n
D. Input PC Board Test
L1
T1
O pen
Check Input PC Board for shorted input diode.
L2
T2
O pen
L3
T3
O pen
Solder Side of PC Board
If any test has resistance, then replace the Main Contactor also.
E. Main Contactor (MC1) Test
Reconnect power and observe proper start-up procedure.
With the ON/OFF Front Panel switch in the ON position, the AC LED should be blinking. If AC LED is not
blinking, there is either no power tot he unit or an overvoltage condition exists.
• Single Phase Units check at L1 and L2
• Three Phase Units check L1, L2, and L3
Input PC Board
A-02563
SECTION 4: SERVICE TROUBLESHOOTING
22
Manual 0-2747
Main Contactor
(MC1)
5. Place the front panel ON/OFF switch to the OFF
position.
L3
6. Disconnect ribbon cable from the Lower FET/
Heatsink Assembly at J6.
L2
L1
Coil
Wire #55
7. Place the front panel ON/OFF switch to ON.
8. Check status of the TEMP indicator. If indicator
has gone OFF, then remove power and replace the
Lower FET/Heatsink Assembly.
9. Place the front panel ON/OFF switch to the OFF
position.
10. Remove power from unit.
Coil
Wire #59
A-02671
11. Disconnect connector from J2.
12. Check for short on Connector (harness end) between J2-15 & 16.
Note: Not all MC1 wire
connections are shown
If shorted, replace TS1.
Measure voltage on coil of contactor, approximately 117
VAC between wires #70 and #75.
If no short is found, replace Logic/Gate PC Board.
• If voltage is correct, replace Main Contactor.
TP1 (GND)
• If voltage is incorrect, replace Logic PC Board.
F. Temperature Circuit Test
Test the temperature circuit per the following:
1. Place the front panel ON/OFF switch to the OFF
position.
2. Disconnect ribbon cable from the Upper FET/
Heatsink Assembly at J6.
A-02546
Logic/Gate PC Board
J2
A-01213
FET/Heatsink and
Capacitor PC Board
Assembly
G. Gas Solenoid Circuit Test
Make the following voltage checks per the circuit diagram and replace the faulty part as required.
Wire #56
4
Gas
Solenoid
Wire #52
J6
Logic PC
Board
10
A-01198
3. Place the front panel ON/OFF switch to ON.
4. Check status of the TEMP indicator. If indicator
has gone OFF, then remove power and replace the
Upper FET/Heatsink Assembly.
Manual 0-2747
J2
1. Check for 115 VAC from Wire #56 to wire #52 at the
gas solenoid.
If approximately 115 VAC replace solenoid.
23
SECTION 4: SERVICE TROUBLESHOOTING
If no voltage is present proceed to Step 2.
2. Measure for 115 VAC from J2-4 to J2-10 at the Logic/
Gate PC Board.
D1
D2
D45
D20
D36
D39
If voltage is not correct replace Logic/Gate PC
Board.
H. Pilot Arc Circuit
Check across E23 to E24 at the Pilot Output PC Board.
There should be a diode drop across E23 to E24 in one
direction and an open in the other.
If shorted remove the wires at E23 and E24 at the Pilot Output PC Board and check again.
Replace Pilot Output PC Board if shorted from E23 to
E24 (with wires #17 and #16 removed).
Logic/Gate PC Board
1. No DC Output
An open circuit voltage of approximately 280 to 325
VDC (depending on input power selected) is produced when switching transistors in the FET/
Heatsink Assemblies are turned ON by a PWM Enable signal from the Logic/Gate PC Board. A circuit
on the Logic/Gate PC Board monitors the output voltage. When the output voltage drops below 60 VDC,
indicating a problem exists, the Logic/Gate PC Board
sends a signal which turns OFF the PWM Enable signal to the Logic/Gate PC Board. Because this happens in less than 50 milliseconds, it is not easy to take
voltage readings to find the source of the problem.
If Pilot Output PCB is not shorted, check for shorted
torch. Check for short between E8 and E22. If shorted,
replace Pilot/Output PCB.
I. FET/Heatsink Circuit Tests
The FET/Heatsink circuit tests require various checks to
isolate the possible fault to the FET/Heatsink Assembly.
There are several internal indicators (LED's) on the
Logic/Gate PC Board to help in troubleshooting.
The indicators on the Logic/Gate PC Board as follows:
I n d ica t o r
M e a n in g
D12
S t a rt - w h e n O N in d ic a t e s t o rc h
s w it c h is p re ss e d
D20
C D E n a b le - I n it ia t e s s p a rk g a p
o n C D P C B o a rd . I n d ica t o r
s h o u ld co m e O N t h e n g o O F F
a f t e r a p ilo t a rc h a s b e e n
e st a b lis h e d .
D20
When the unit is at “idle” the AC OK indicator on
Front Access Panel should be ON. The Start indicator, D1, turns ON when the torch switch is pressed.
At this point the gas begins to flow. When the preflow
time is over the PWM Enable signal is given PWM
turns on, and the DC indicator at the front panel turns
ON. When the PCR Drive/Pilot On indicator D39
turns ON.
If the PWM Enable indicator, D45, does not come ON
then replace the Logic/Gate PCB.
If the PWM Enable indicator, D45, turns ON then OFF
immediately, the following test should be performed:
C S R - I n d ic a t e s m a in c u t t in g a rc
is e s t a b lish e d .
D39
P ilo t O N - I n d ic a t e s P C R R e la y
D rive is a c t iv e .
D45
P W M - I n d ic a t e s t h e p u ls e w id t h
m o d u la t io n I C c h ip is ru n n in g
D36
D ra g O n - W h e n O N in d ic a t e s
t h a t t h e t o rc h t ip is m a kin g
c o n t a ct w it h t h e w o rk p ie ce .
SECTION 4: SERVICE TROUBLESHOOTING
A-02550
a. Disconnect J11 from the CD PC Board to disable the CD signal.
24
Manual 0-2747
e. If voltage is okay, check torch & leads. If voltage is low, disconnect wire from E24 on Pilot
Output Board and recheck steps c-d. If voltage is still low, disconnect wires 11-12 (from
FET PCB to Pilot Output PCB).
CD PC Board
Make sure wires #11 & #12 which connect the
FET Assemblies to each other remain connected. Check for output voltage between E17
& E18. If voltage is OV- then replace both FET
Assemblies.
J11
A-01202
Pilot Output PC Board
A-01401
b. Connect a jumper between TP1 and TP8 of the
Logic/Gate PC Board.
NOTE
D1
TP1
Top
Before pressing the trigger, make sure no faults were
found on the Pilot Board and in the torch.
TP8
E7
Logic/Gate PC Board
E29
A-02552
2. FET/Heatsink Output Diode Checks
This will cause the gas to flow continuously and
the DC indicator on the front panel to turn ON.
Remove input power from the unit.
Isolate each FET/Heatsink Assembly by removing the
red wire #12 at E18 and the black wire #11 at E17 on
each FET/Heatsink Assembly. With an ohmmeter set
on the diode range, check between the two output
studs, E17 (- output) to E18 (+ output). This should
indicate a diode drop in one direction and open in the
other.
WARNING
Connector J11 on the CD PC Board must be disconnected to prevent electrical damage to measuring equipment when testing the open circuit voltage (OCV).
c. Press and hold the hand torch switch (Logic/
Gate PC Board Start indicator, D1 turns ON).
After 2 seconds D45 (Logic/Gate PCB) turns
on. If D45 does not turn on, replace Logic/
Gate PCB.
If the checks indicate open or shorted in both directions then the faulty FET/Heatsink Assembly should
be replaced.
3. MOSFET Resistance Checks
The Power Supply contains two identical FET/
Heatsink Assemblies. On each assembly there are two
MOSFET devices that must be checked. Use an ohmmeter to check for the proper resistance of the
MOSFET's per the following procedure:
d. Measure open circuit voltage between E29 (+)
to E7 (-) at the Pilot Output PC Board.
a. Locate Q1 and Q6 on the FET/Heatsink Assembly.
Manual 0-2747
25
SECTION 4: SERVICE TROUBLESHOOTING
Q6
a. Place the meter (+) lead on E14 and the meter (-)
lead on E25 of the FET/Heatsink Assembly Capacitor PC Board to check the reset diode. The
meter should indicate between 0.4 to 0.6 volts using the diode function.
Q1
FET/Heatsink and
Capacitor PC Board
Assembly
b. Reverse the meter leads and the indication should
be a capacitor charging.
c. Place the meter (-) lead on E14 and the meter (+)
lead on E26 of the FET/Heatsink Assembly Capacitor PC Board to check the reset diode. The
meter should indicate between 0.4 to 0.6 volts using the diode function.
d. Reverse the meter leads and the indication should
be a capacitor charging.
A-01214
If the indication is a short, then replace the FET/
Heatsink Assembly.
5. FET Output Rectifier Check
b. Place the meter (+) lead on gate lead of Q1 and
meter (-) lead on source lead of Q1. The meter
should indicate approximately 2.5K ohms.
Spring
Clip
Use a digital meter, diode or ohms function, to check
the forward and reverse bias of the output rectifiers
on the FET/Heatsink Assemblies per the following
procedure:
a. Remove the wire from E16 and E18 on the Upper
and Lower FET/Heatsink Assemblies.
MOSFET
Gate
A-01215
Source
Drain
A-00553
c. Place the meter (+) lead on drain lead of Q1 and
meter (-) lead on source lead of Q1. The meter
should indicate >100K ohms.
E14
E15
E19
NOTES
Make measurements near the body of each
MOSFET.
Be sure that the meter lead probes penetrate the
protective coating on the MOSFET.
d. Place the meter (+) lead on drain lead of Q1 and
meter (-) lead to the heatsink. The meter should
indicate >1 meg ohms.
E17
e. Place the meter (+) lead on gate lead of Q6 and
meter (-) lead on source lead of Q6. The meter
should indicate approximately 2.5K ohms.
E18
b. Place the meter (+) lead on E16 and the meter (-)
lead on E18 of the FET/Heatsink Assembly to
check the output rectifier forward bias. The meter
should indicate between 0.3 to 0.6 volts using the
diode function or 100K ohms using the ohms function.
f. Place the meter (+) lead on drain lead of Q6and
meter (-) lead on source lead of Q6. The meter
should indicate >100K ohms.
4. FET Reset Diode Check
Use an ohmmeter set to the diode function and check
the reset diode per the following procedure:
SECTION 4: SERVICE TROUBLESHOOTING
E16
26
Manual 0-2747
c. Place the meter (+) lead on E18 and the meter (-)
lead on E16 of the FET/Heatsink Assembly to
check the output rectifier reverse bias. The meter
should indicate 'OL' using the diode function or
100K ohms using the ohms function.
d. Place the meter (+) lead on E17 and the meter (-)
lead on E19 of the FET/Heatsink Assembly to
check the output rectifier forward bias. The meter
should indicate between 0.3 to 0.6 volts using the
diode function or 100K ohms using the ohms function.
e. Place the meter (+) lead on E19 and the meter (-)
lead on E17 of the FET/Heatsink Assembly to
check the output rectifier reverse bias. The meter
should indicate 'OL' using the diode function or
100K ohms using the ohms function.
f. Place the meter (+) lead on E18 and the meter (-)
lead on the heatsink of the FET/Heatsink Assembly to check the output rectifier resistance to
ground. The meter should indicate >1 meg ohms.
Replace the FET/Heatsink Assembly if any of the
above tests are open or shorted.
6. FET Output Clamp Diodes Check
Use an ohmmeter to check the resistance of the output clamp diodes, (+ out) E17 and (- out) E18, per the
following procedure:
NOTE
The wires on E16 and E18 should still be disconnected from both FET/Heatsink Assemblies.
a. Place the meter (+) lead on E17 and the meter (-)
lead on E18 of the FET/Heatsink Assembly to
check the output clamp diode resistance. The
meter should indicate >1 meg ohms.
b. Place the meter (+) lead on E18 and the meter (-)
lead on E17 of the FET/Heatsink Assembly to
check the output clamp diode resistance. The
meter should indicate >1 meg ohms.
Replace the FET/Heatsink Assembly if any of the
above tests are open or shorted.
Manual 0-2747
27
SECTION 4: SERVICE TROUBLESHOOTING
SECTION 4: SERVICE TROUBLESHOOTING
28
Manual 0-2747
2. Unroll the rest of the band and peel the liner from
the copper foil at the opposite end.
SECTION 5:
REPAIRS & REPLACEMENT
PROCEDURES
3. Attach the copper foil to a convenient and exposed
electrical ground.
4. Connect the equipment primary cable ground to
the same electrical ground as the wrist strap.
5.01 Introduction
5. Open the equipment enclosure (see instruction
manual for the appropriate equipment) and remove the failed PC Board.
This Section describes parts replacement procedures and
all cable repairs which may be performed on the Pak
Master 75XL PLUS Power Supply.
6. Carefully open the ESD protective bag and remove
the replacement PC Board.
Under no circumstances are field repairs to be attempted
on Printed Circuits or other subassemblies of this unit.
Evidence of unauthorized repairs may void the factory
warranty.
7. Install the replacement PC Board in the equipment
and make all necessary connections.
8. Place the failed PC Board in the ESD protective
bag and seal for return shipping.
5.02 Anti-Static Handling
Procedures
9. Reassemble the equipment enclosure (see instruction manual for the appropriate equipment).
A. General
10. Remove the grounding wrist strap from your wrist
and from the electrical ground connection before
reconnecting primary power to the equipment.
CAUTION
PC Boards can be irreparably damaged by improper
handling due to electrostatic discharge (ESD).
Replacement PC Boards are shipped in a protective enclosure to prevent damage from electrostatic discharge
(ESD) during shipping. Included with each replacement
board is a ground strap to prevent static damage during
installation.
5.03 Parts Replacement - General
Information
The parts replacement procedures described in this
manual, except for filter replacement, require that the
Power Supply be disassembled. The part to be replaced
will determine to what extent the Power Supply must be
disassembled.
NOTES
WARNINGS
Before removing any connection mark each wire
with the connection designation. When reassembling make sure the wires go to the proper terminals.
Read and understand these instructions and the
instructions on the grounding wrist strap package
before opening the equipment enclosure or removing the replacement PC Board from its protective
enclosure.
Disconnect primary power to the system before disassembling the torch, torch leads, or power supply
enclosure.
Note the routing of wires and make sure the wires
are put back in the same place when reassembling
the unit.
Each Subsection is referenced to Section 6 for parts lists
and overall detailed drawing.
Do not operate the equipment or test equipment
under power while wearing the grounding wrist
strap.
WARNING
Disconnect primary power from the source before
opening or disassembling the power supply. Make
sure AC Indicator on the Power Supply front panel
is OFF.
B. Procedure
1. Open the wrist strap and unwrap the first two folds
of the band. Wrap the adhesive side firmly around
your wrist.
Manual 0-2747
29
SECTION 5: REPLACEMENT PROCEDURES
Before disassembling any part of the Power Supply first
read the procedure for the part to be replaced, then proceed with the disassembly.
5.04 Major External Parts
Replacement
• Leads Wrap must be installed on the replacement Left Side Panel before panel is installed.
• Place the Left Side Panel onto the bottom three
screws of the frame and slide the top edge under the lip on the top of the Right Side Panel.
C. Right Side Panel Replacement
NOTE
1. Remove the Lifting Handle per paragraph 'A'
above.
Refer to Section 6.03 for parts list and overall detail drawing.
2. Unlock the latch for the Access Panel.
A. Lifting Handle Replacement
3. Using a phillips head screwdriver remove the two
screws and loosen the three bottom screws which
secure the Right Side Panel to the Frame Assembly.
1. Remove the two allen screws securing the ends of
the handle to the top of the unit.
2. Remove the Lifting Handle from the two end
mounting blocks.
4. Carefully pull the Right Side Panel up and away
from the unit far enough to gain access to the wire
connections on the inside of the Access Panel.
3. Place the replacement Lifting Handle into the
mounting blocks.
5. Disconnect the LED/POT PC Board wiring connector from J3 at the Logic/Gate PC Board.
4. Secure the Lifting Handle to the top of the unit
with the two allen screws.
6. Remove the two nuts securing the Access Panel to
the Right Side Panel.
B. Left Side Panel Replacement
1. Using a phillips head screwdriver remove the two
side screws and loosen the three bottom screws
securing the Left Side Panel to the Frame Assembly.
4. Install the replacement Right Side Panel by reversing the above procedure noting the following:
a. Install the Access Panel onto the replacement
Right Side Panel.
b. Place the Right Side Panel onto the frame and
slide the lip on the top edge over the edge on
the top of the Left Side Panel.
Left Side
Panel
D. Leads Wrap Panel Replacement
1. Remove the Left Side Panel per Section 5.04-B.
2. Remove the four screws securing the Leads Wrap
Panel to the Left Side Panel.
A-02564
3. Install the replacement Leads Wrap Body by reversing the above procedure.
Ground Wire
Screws (5 places)
5.05 Access Panel Parts
Replacement
2. Carefully pull the Left Side Panel up and away
from the unit far enough to gain access to the
ground wire connection on the inside of the panel.
NOTE
Refer to Section 6.04 for parts list and overall detail drawing.
3. Remove the nut from the ground stud on the side
panel and remove the ground wire.
4. Remove the four screws securing the Leads Wrap
to the old Left Side Panel.
5. Install the replacement Left Side Panel by reversing the above procedure noting the following:
SECTION 5: REPLACEMENT PROCEDURES
30
Manual 0-2747
7. Install the replacement Pot/LED PC Board by reversing the above procedure.
A. CURRENT Knob Replacement
1. Turn the CURRENT adjustment fully counter clockwise and note the location of the pointer on the
knob.
E. Access Panel Replacement
1. Remove the Right Side Panel per Section 5.04-C.
2. Loosen the screw securing the Current Knob to the
potentiometer shaft.
2. Remove the following components from the Access Panel:
3. Remove the old knob.
• Current Knob per paragraph 'A' above.
4. Place the replacement Current Knob on to the potentiometer shaft with the location of the pointer
the same as noted in step 1.
• ON/OFF Switch per paragraph 'B' above.
• RUN/SET /LATCHSwitch per paragraph 'C'
above.
5. Tighten the screw to secure the knob to the potentiometer shaft.
• Pot/LED PC Board per paragraph 'D' above.
B. ON/OFF Switch Replacement
3. Remove the two nuts and washers securing the
Access Panel to the Right Side Panel.
1. Unlatch the Access Panel to gain access to the rear
of the ON/OFF Switch.
4. Install the replacement Access Panel by reversing
the above procedure.
2. Disconnect all the wiring to the ON/OFF Switch.
3. Squeeze the top and bottom of the switch while
pulling it out of the Access Panel
5.06 Front Panel Parts Replacement
NOTE
4. Install the replacement ON/OFF Switch by reversing the above procedure.
Refer to Section 6.05 for parts list and overall detail drawing.
C. RUN/SET/LATCH Switch Replacement
1. Unlatch the Access Panel to gain access to the rear
of the RUN/SET/LATCH Switch.
A. Work Cable Replacement
1. Remove the Left Side Panel per Section 5.04-B.
2. Remove the Right Side Panel per Section 5.04-C.
2. Disconnect all the wiring to the RUN/SET/LATCH
Switch.
3. Loosen the Work Cable end at the terminal on the
Output PC Board.
3. Squeeze the top and bottom of the switch while
pulling it out of the Access Panel
4. Remove the Work Cable connection fromt he lower
FET/Heatsink Assembly at E18 (OUTPUT) terminal.
4. Install the replacement RUN/SET/LATCH Switch
by reversing the above procedure.
5. Remove the work cable strain relief from the Front
Panel.
D. Pot/LED PC Board Assembly Replacement
1. Turn the CURRENT adjustment fully counter clockwise and note the location of the pointer on the
knob.
2. Loosen the screw securing the Current Knob to the
potentiometer shaft.
6. Pull the Work Cable from the unit.
7. Install the replacement Work Cable by reversing
the above procedure.
B. Main Contactor Replacement
3. Remove the Current Knob.
1. Remove the Left Side Panel per Section 5.04-B.
4. Unlatch the Access Panel to gain access to the Pot/
LED PC Board.
2. Note the orientation of all the wires and then disconnect the input and output wiring from the Main
Contactor Assembly.
5. Remove the Pot/LED PC Board from the four standoffs.
3. Remove the two nuts and washers securing the
Main Contactor to the bottom of the unit.
6. Disconnect the connector at J14 of the Pot/LED PC
Board.
Manual 0-2747
31
SECTION 5: REPLACEMENT PROCEDURES
4. Remove the two small screws securing the Fuse
Holder to the chassis.
4. Install the replacement Main Contactor Assembly
by reversing the above procedure.
5. Install the replacement Fuse Holder by reversing
the above procedure.
C. Unit Base/Front Replacement
1. Remove the Left Side Panel per Section 5.04-B.
2. Remove the Right Side Panel per Section 5.04-C.
C. Input PC Board Assembly Replacement
1. Remove the Left Side Panel per Section 5.04-B.
3. Remove the Work Cable per paragraph "A' above.
2. Remove the five screws securing the wiring to the
Input PC Board.
4. Remove the Torch from the unit.
5. Remove the following hardware:
a. Two mounting nuts from Main Contactor Assembly.
b. Nut and wires from ground stud.
c. Bottom two screws securing Rear Panel to Base/
Front Assembly.
d. On the right side remove the two screws securing the Pilot Panel to the Base/Front Panel
Assembly.
Connection
Qty
(-)
(+)
AC1
AC2
AC3
2
2
3
2
2
Description
of Cable
Cable 7
Cable 10
Cable 1
Cable 2
Cable 3
3. Remove the clear Input PC Board Insulator sheet.
4. Carefully pull the Input PC Board from the unit far
enough to disconnect the wiring connections to the
component side of the PC Board.
e. On the right side remove the three nuts and
washers securing the internal chassis to the bottom of the unit.
5. Install the replacement Input PC Board by reversing the above procedure noting the following:
6. At the front panel remove the two screws securing
the Base/Front Panel to the internal chassis.
NOTE
7. Carefully slide the internal components up, back,
and out of the Base/Front Assembly.
Failure to properly tighten the seven screws securing the Input PC Board to the Diode Bridge will
cause damage to the unit.
8. Install the replacement Base/Front Assembly by
reversing the above procedure.
• The five screws securing the wiring and Input
PC Board to the Diode Bridge must be tight
enough to prevent the wires from moving.
5.07 Left Side Internal Component
Parts Replacement
D. Input Diode Bridge Assembly Replacement
NOTE
1. Remove the Left Side Panel per Section 5.04-B.
Refer to Section 6.06 for parts list and overall detail drawing.
2. Remove the Right Side Panel per Section 5.04-C.
3. Remove the Input PC Board per paragraph 'C'
above.
A. Fuse Replacement
1. Remove the Left Side Panel per Section 5.04-B.
4. Remove the two nuts securing the Input Diode
Bridge to the Center Chassis.
2. Remove the Fuse from the fuse holder.
5. Remove the Input Diode Bridge Assembly from
the unit.
3. Replace the Fuse with 0.8A 600V fuse.
4. Reinstall the Left Side Panel.
6. Remove the Thermal Pad from the Center Chassis.
B. Fuse Holder Replacement
1. Remove the Left Side Panel per Section 5.04-B.
7. Remove the Input Heatsink on the right side of the
unit.
2. Remove the Fuse from the holder.
8. Remove the Thermal Pad from the Input Heatsink.
3. Disconnect the two wires connected to the Fuse
Holder.
SECTION 5: REPLACEMENT PROCEDURES
32
Manual 0-2747
9. Install the replacement Input Diode Bridge Assembly and new Thermal Pad by reversing the above
procedure (see Note).
Connection
NOTE
The two nuts removed in Step 3 must be torqued
to 35 in-lbs when reinstalled.
E. Logic/Gate PC Board Replacement
Description
E14
Main Transformer (Primary)
E15
E16
E17
E18
E19
Main Transformer (Primary)
Main Transformer (Secondary)
(-) Output
(+) Output
Main Transformer (Secondary)
1. Remove the Left Side Panel per Section 5.04-B.
6. Remove the two screws securing the Heatsink
Mounting Bracket to the chassis.
2. Carefully remove all cable connections from the
Logic/Gate PC Board noting the location of each
per the following chart:
Connection
J1
J2
J5
J17
J10
J8
J7
7. Lift up on the middle where the two FET/Heatsink
Assemblies come together and remove the Mounting Bracket.
Description
Cable from Auxillary
Transformer
16-pin Cable
16-pin Cable
Cable from Current Sensor
Cable from Input PC Board
Ribbon Cable from Top
FET/Heatsink Assembly
Ribbon Cable from Bottom
FET/Heatsink Assembly
8. Slide the FET/Heatsink Assembly out and up to
remove the FET/Heatsink Assembly from the unit.
9. Install the replacement FET/Heatsink Assembly
by reversing the above procedure, keeping in mind
the following:
• Cables marked with 'A' connect to the upper
FET/Heatsink Assembly, cables marked 'B'
connect to the lower FET/Heatsink Assembly.
3. Remove the four screws securing the Logic/Gate
PC Board to the standoffs.
• Connect cables with similarly named terminals
(for example, connect cable 16A to terminal 16).
4. Install the replacement Logic/Gate PC Board by
reversing procedure.
NOTE
Be sure that the top groove in the FET/Heatsink
Assembly is properly seated over the cutout in the
chassis.
F. FET/Heatsink Assembly Replacement
NOTE
The two FET/Heatsink Assemblies are identical and
are removed in the same manner.
1. Remove the Left Side Panel per Section 5.04-B.
2. Place the unit on its right side.
3. Remove the Ribbon Cable plug at J6 on the FET/
Heatsink Assembly. To remove the cable, push
down on the locking tab and pull the cable plug
out of the connector.
4. Disconnect all the wire lug connections to the FET/
Heatsink Assembly.
5. Disconnect the wiring from wire lug connections
on the Capacitor PC Board at '+' and '-' terminals.
Manual 0-2747
33
SECTION 5: REPLACEMENT PROCEDURES
2. Remove the Right Side Panel per Section 5.04-C.
5.08 Rear Panel Parts Replacement
3. Disconnect the gas tube connected to the bottom of
the T-fitting at the Solenoid Valve Assembly.
NOTE
Refer to Section 6.07 for parts list and overall detail drawing.
4. Remove the Air Line Regulator Bracket per paragraph 'C' above.
A. Pressure Switch Replacement
5. Pull the Air Line Regulator away from the Rear
Panel far enough to disconnect the plumbing joint
between the reducer and elbow fitting..
1. Remove the Right Side Panel per Section 5.04-C.
2. Disconnect the two wires connected to the Pressure Switch Assembly.
6. Remove the elbow fitting from the old assembly.
7. Install the replacement Air Line Regulator Assembly by reversing the above procedure and noting
the following:
3. Remove the assembly from the T-fitting.
4. Install the replacement Pressure Switch Assembly
by reversing the above procedure and noting the
following:
• Apply pipe thread sealant to the fitting before
reassembling.
B. Solenoid Valve Replacement
• Apply pipe thread sealant to the fitting before
reassembling.
5.09 Right Side Internal Component
Parts Replacement
1. Remove the Right Side Panel per Section 5.04-C.
NOTE
2. Disconnect the two wires connected to the Pressure Switch Assembly.
3. Disconnect the two wires connected to the Solenoid Valve Assembly.
Refer to Section 6.08 for parts list and overall detail drawing.
A. Pilot/Output PC Board Assembly
Replacement
4. Disconnect the gas tube connected to the bottom of
the T-fitting.
1. Remove the Right Side Panel per Section 5.04-C.
NOTES
5. Remove the T-fitting and gas fitting from the Solenoid Valve Assembly.
Before removing any connection mark each wire
with the connection designation. When reassembling this makes sure the wires go to the proper
terminals.
6. Remove the Solenoid Valve Assembly from the
straight brass fitting.
7. Install the replacement Solenoid Valve Assembly
by reversing the above procedure.
Note the routing of wires and make sure the wires
are put back in the same place when reassembling
the unit.
C. Air Line Regulator Bracket Replacement
1. Disconnect the gas input hose from the input of the
Air Line Regulator Assembly.
2. Disconnect all the wiring connections to the Pilot/
Output PC Board Assembly.
2. Remove the nut securing the Air Line Regulator to
the mounting bracket.
3. Remove the four screws and washers securing the
PC Board to the standoffs.
3. Remove the four screws securing the Air Line Regulator Bracket to the Rear Panel.
4. Install the replacement Pilot/Output PC Board Assembly by reversing the above procedure.
4. Pull the bracket from the unit.
B. CD PC Board Assembly Replacement
1. Remove the Right Side Panel per Section 5.04-C.
5. Install the replacement Air Line Regulator Bracket
by reversing the above procedure.
NOTES
D. Air Line Regulator Replacement
Before removing any connection mark each wire
with the connection designation. When reassembling this makes sure the wires go to the proper
terminals.
1. Disconnect the gas input hose from the input of the
Air Line Regulator Assembly.
SECTION 5: REPLACEMENT PROCEDURES
34
Manual 0-2747
Note the routing of wires and make sure the wires
are put back in the same place when reassembling
the unit.
6. Install the replacement Main Transformer Assembly by reversing the above procedure (see Note).
NOTE
2. Disconnect all the wiring connections to the CD
PC Board Assembly.
3. Remove the four screws and washers securing the
PC Board to the standoffs.
The four screws securing the mounting plate to
the chassis should have a maximum of 2 to 5 threads
protruding through the left side of the chassis.
E. Output Inductor Assembly Replacement
4. Install the replacement CD PC Board Assembly by
reversing the above procedure.
1. Remove the Left Side Panel per Section 5.04-B.
2. Remove the Right Side Panel per Section 5.04-C.
C. Relay Replacement
3. Disconnect the lead wire on terminal E7 of the Pilot Output PC Board.
1. Remove the Right Side Panel per Section 5.04-C.
NOTES
4. Disconnect the lead wire on terminal E17 of the top
FET/Heatsink Assembly.
Before removing any connection mark each wire
with the connection designation. When reassembling this makes sure the wires go to the proper
terminals.
5. Remove the four mounting screws securing the Output Inductor Assembly to the chassis.
6. Remove the Output Inductor Assembly from the
unit.
Note the routing of wires and make sure the wires
are put back in the same place when reassembling
the unit.
7. Install the replacement Output Inductor Assembly
by reversing the above procedure (see NOTE).
2. Disconnect all the wiring connections to the Relay
Assembly.
NOTE
3. Remove the two screws securing the Relay Assembly to the Pilot Panel.
4. Install the replacement Relay Assembly by reversing the above procedure.
D. Main Transformer Assembly Replacement
The four screws securing the mounting plate to
the chassis should have a maximum of 2 to 5 threads
protruding through the left side of the chassis.
F. Auxiliary Transformer Assembly
Replacement
1. Remove the Left Side Panel per Section 5.04-B.
1. Remove the Left Side Panel per Section 5.04-B.
2. Remove the Right Side Panel per Section 5.04-C.
2. Remove the Right Side Panel per Section 5.04-C.
3. Remove the following terminal connections from
the two FET/Heatsink Assemblies noting the location of each wire:
3. Disconnect the white wire single pin connector
coming from the Auxiliary Transformer Assembly.
C o n n e c t io n
D e sc rip t io n
E14
M AIN XF M R PR I
E15
XF M R PR I
E16
M AIN XF M R SEC
E19
XF M R SEC
4. Unplug J1 from the Logic/Gate PC Board and slide
through plastic bushing in chassis.
5. Unplug the voltage selector (blue wire) located on
lef side of center chassis.
6. Remove connectors J19 (black wire), J20 (orange
wire), and J21 (brown wire) from the center chassis using a socket removal tool.
7. Remove the four mounting screws securing the
Auxiliary Transformer Assembly to the chassis.
4. Remove the four screws which hold the mounting
plate to the bottom chassis.
8. Remove the Auxiliary Transformer Assembly from
the unit.
5. Carefully remove the mounting plate with the Main
Transformer Assembly from the unit.
Manual 0-2747
9. Install the replacement Auxiliary Transformer Assembly by reversing the above procedure noting
the following:
35
SECTION 5: REPLACEMENT PROCEDURES
• Brown wire to 460V selector connector (J21) on
center chassis.
5. Remove the first nut from the Bulkhead Adapter.
6. Carefully remove the wire from the Bulkhead
Adapter that comes from the CD Transformer Coil.
• Orange wire to 380V selector connector (J20) on
the voltage selection panel.
7. Remove the second nut securing the Bulkhead
Adapter to the bulkhead.
• Black wire to 220V selector connector (J19) on
the voltage selection panel.
8. Install the replacement Bulkhead Adapter by reversing the above procedure.
H. Fan Replacement
A-02561
460V
1. Remove the Left Side Panel per Section 5.04-B.
(brown wire)
NOTE
The Top and Bottom Fan Assemblies are replaced
in the same manner.
2. Remove the center chassis by following the procedure in Section 5.06-C.
3. Locate the wiring to the Fans and note the orientation of the Fan Assembly wiring push on connectors.
220V
(black wire)
4. Carefully pull the wiring connectors from the lugs
on the Fan Assembly.
380-415V
5. Locate and remove the four phillips head screws
securing the Fan Assembly to the internal chassis.
(orange wire)
View of Voltage Selector Connectors
from the Left Side of
Center Chassis
6. Carefully pull the Fan Assembly from the internal
chassis.
7. Install the replacement Fan Assembly by reversing
the above procedure.
G. Bulkhead Adapter Replacement
NOTE
Refer to Section 6.08 for parts list and overall detail drawing.
1. Remove the Right Side Panel per Section 5.04-C.
2. Remove Torch connection at the Bulkhead Adapter.
A-02562
Fitting
Gas
Tube
Nut
Bracket
Nut
Bulkhead
Adapter
3. Disconnect the gas tube from the fitting at the end
of the Bulkhead Adapter.
4. Remove the fitting.
SECTION 5: REPLACEMENT PROCEDURES
36
Manual 0-2747
SECTION 6:
PARTS LISTS
6.01 Introduction
A. Parts List Breakdown
The parts lists provide a breakdown of all replaceable
components. The parts lists are arranged as follows:
Section 6.03 Major External Replacement Parts
List
Section 6.04 Access Panel Replacement Parts List
Section 6.05 Front Panel Replacement Parts List
Section 6.06 Left Side Internal Component Replacement Parts List
Section 6.07 Rear Panel Replacement Parts List
Section 6.08 Right Side Internal Component
Replacement Parts List
Section 6.09 Options and Accessories
NOTE
Parts listed without item numbers are not shown,
but may be ordered by the catalog number shown.
B. Returns
If a Thermal Dynamics product must be returned for service, contact your Thermal Dynamics distributor. Materials returned to Thermal Dynamics without proper authorization will not be accepted.
6.02 Ordering Information
Order replacement parts by catalog number and complete
description of the part or assembly, as listed in the parts
list for each type item. Also include the model and serial
number of the torch. Address all inquiries to your authorized Thermal Dynamics distributor.
Manual 0-2747
37
SECTION 6: PARTS LISTS
6.03 Major External Replacement Parts List
Item #Qty
Description
1
2
3
1
2
1
4
1
5
1
TUBE, LIFTING HANDLE,1.125 OD,11.85 LG
MOUNT, LIFTING HANDLE
COVER, LEFT SIDE Includes:
COVER LEFT SIDE
LABEL, WARNING, ENGLISH
COVER, RIGHT SIDE Includes:
COVER RIGHT SIDE
OVERLAY, RH SIDE PANEL
LABELS
LABEL, WARNING, FRENCH
LEADS WRAP Includes:
PANEL, LEADS WRAP
OVERLAY LH SIDE PANEL
SECTION 6: PARTS LISTS
Reference #
38
Catalog #
9-7505
9-7506
9-8001
9-8016
9-8017
Manual 0-2747
D
1
2
4
D
2
3
C
5
23x4496
A
A-02568
NOTE: Illustration may vary
slightly from actual unit
Manual 0-2747
39
A
B
C
D
HARDWARE
#10-32 Regular Nylon Lock Nut
#10-32 x 2" PPH HDMS
#10-32 x 0.5" PPH Sw ageform Stl Zn Screw
1/4-20 x 3" Screw , Soc HD
E
F
G
H
I
J
#6-32 x 3 1/2" THD Screw
#10-32 x 3/4" PPH Sw ag Screw
#6-32x3/8 PPH STL ZN Screw
Rubber Feet
#6-32x3 3/4 LG PH Screw
#10-32 Keput w /Star Washer
SECTION 6: PARTS LISTS
6.04 Access Panel Replacement Parts List
Item #
1
2
3
4
5
Qty
1
1
1
1
1
Description
Reference#
ASSEMBLY, POT/LED PCB
KNOB,INNER CONCENTRIC
SWITCH, ROCKER, SPST
ON/OFF ROCKER SWITCH, DPST
PANEL, ACCESS Includes:
OVERLAY, ACCESS PANEL
LABEL, ACCESS PANEL
SECTION 6: PARTS LISTS
40
Catalog #
9-8004
9-8007
8-3259
8-3258
9-8018
Manual 0-2747
4
3
2
A-02532
c
5
1
Manual 0-2747
41
A
B
C
D
HARDWARE
#10-32 Regular Nylon Lock Nut
#10-32 x 2" PPH HDMS
#10-32 x 0.5" PPH Sw ageform Stl Zn Screw
1/4-20 x 3" Screw , Soc HD
E
F
G
H
I
J
#6-32 x 3 1/2" THD Screw
#10-32 x 3/4" PPH Sw ag Screw
#6-32x3/8 PPH STL ZN Screw
Rubber Feet
#6-32x3 3/4 LG PH Screw
#10-32 Keput w /Star Washer
SECTION 6: PARTS LISTS
6.05 Front Panel Replacement Parts List
Item #
Qty
1
1
2
3
4
5
1
1
1
1
Description
Refence#
PANEL, BASE/FRONT Includes:
BASE/FRONT, UNIT
USA LABEL
GROUND TAG
OVERLAY, FRONT PANEL
CONTACTOR, MAIN, 4P, 40 FLA, 600V, 120VAC
STRAIN RELIEF, .325-.60
WORK CABLE, #6 AWG W/CLAMP – 20ft
CLAMP
SECTION 6: PARTS LISTS
42
Catalog #
9-8019
MC1
9-7507
8-5537
9-8008
9-8120
Manual 0-2747
1
J
4
2
A-02565
3
5
NOTE: Illustration may vary
slightly from actual unit.
Manual 0-2747
43
A
B
C
D
HARDWARE
#10-32 Regular Nylon Lock Nut
#10-32 x 2" PPH HDMS
#10-32 x 0.5" PPH Sw ageform Stl Zn Screw
1/4-20 x 3" Screw , Soc HD
E
F
G
H
I
J
#6-32 x 3 1/2" THD Screw
#10-32 x 3/4" PPH Sw ag Screw
#6-32x3/8 PPH STL ZN Screw
Rubber Feet
#6-32x3 3/4 LG PH Screw
#10-32 Keput w /Star Washer
SECTION 6: PARTS LISTS
6.06 Left Side Internal Component Replacement Parts List
Item #
Qty
1
2
3
4
1
1
1
2
5
6
7
8
9
1
1
1
4
1
10
11
12
13
14
15
16
1
1
1
1
1
1
Description
Reference#
INSULATOR, INPUT PCB
CABLE ASS'Y, 10 CIR RIBBON, 15" LG
GATE / LOGIC PCB ASSEMBLY
ASS’Y, FET HEATSINK
ASSEMBLY, FET HEATSINK
DUST COVER, FET ASS’Y
FUSE BLOCK
FUSE,0.8A 600V, 13/32" DIA
BUSHING, PLASTIC SNAP, 1 3/8 ID
STANDOFF, #10-32 X 3/8 HEX X 2"LG, AL
DIODE BRIDGE ASSY
DIODE BRIDGE, 3 PHASE W/SCR, 40A, 1600V
THERMAL PAD, Q3, INPUT MODULE
ASSEMBLY, INPUT PCB
BRKT, HEATSINK MOUNTING
HARNESS, INRUSH CONTROL
HARNESS, CAP BD/VOLTAGE SELECT
HARNESS, VOLTAGE SELECT
VOLTAGE SELECTION LABEL
Catalog #
See Note 1
9-5922
9-8020
9-8021
9-5562
9-7526
See Note 1
See Note 1
9-8011
See Note 1
9-8012
See Note 1
See Note 1
See Note 1
See Note 1
See Note 1
NOTE 1: Item shown for illustration purposes only.
SECTION 6: PARTS LISTS
44
Manual 0-2747
15
14
10
7
9
C
5
11
16
6
1
13
4
C
12
3
8
2
C
A-02566
NOTE: Illustration may vary
slightly from actual unit
Manual 0-2747
45
A
B
C
D
HARDWARE
#10-32 Regular Nylon Lock Nut
#10-32 x 2" PPH HDMS
#10-32 x 0.5" PPH Sw ageform Stl Zn Screw
1/4-20 x 3" Screw , Soc HD
E
F
G
H
I
J
#6-32 x 3 1/2" THD Screw
#10-32 x 3/4" PPH Sw ag Screw
#6-32x3/8 PPH STL ZN Screw
Rubber Feet
#6-32x3 3/4 LG PH Screw
#10-32 Keput w /Star Washer
SECTION 6: PARTS LISTS
6.07 Rear Panel Replacement Parts List
Item #
Qty
1
2
3
4
5
6
7
8
9
10
11
1
1
1
1
1
1
1
1
1
1
1
12
13
14
15
16
17
18
19
1
2
1
1
1
1
1
1
20
21
N/S
1
1
1
Description
Reference#
PRESSURE SWITCH-35 PSI
PS1
VALVE, SOLENOID 1/8 NPT
SOL
REGULATOR, AIR LINE
STRAIN RELIEF
1/4 NPT STREET ELBOW
1/8 NPT STR.TEE
1/4-1/8 NPT REDUCER
FITTING, 1/8 NPT X 2" LONG NIPPLE, BRASS
FITTING, 1/8 NPT X 1/4 TUBE 90°
PRESSURE GAUGE
PANEL, REAR, Includes:
PANEL, REAR
LABEL, GAS SUPPLY
LABEL INPUT POWER CONNECTIONS
HOLDER, REGULATOR MOUNTING
10-32X.5 PPH SWAGEFORM STL ZN. PARKER KALON
FILTER KIT “DRY AIR”(INCLUDES FILTER AND HOSE) - OPTIONAL
REPLACEMENT FILTER ELEMENT “DRY AIR”
REPLACEMENT FILTER HOSE “DRY AIR”
REPLACEMENT FILTER BODY “DRY AIR”
BRACKET, LAMAN FILTER MOUNTING - OPTIONAL
TWO STAGE LAMANAIR LINE FILTER KIT - OPTIONAL
DUAL STAGE AIR FILTER ASSEMBLY
REPLACEMENT FIRST STAGE FILTER
REPLACEMENT SECOND STAGE FILTER
ASSEMBLY, HOSE, FILTER TO REGULATOR
PANEL MOUNTING NUT
220V SINGLE PHASE INPUT POWER CABLE (6 ft./1.8 m)
Catalog #
9-1044
8-3370
9-7514
8-6307
9-2184
8-0352
9-2023
9-7524
9-7525
9-1045
9-8022
9-7589
9-7590
7-7507
9-7741
9-7742
9-7740
9-7535
7-7500
9-7527
9-1021
9-1022
9-7513
9-5804
9-7512
NS=Not Shown
SECTION 6: PARTS LISTS
46
Manual 0-2747
5
20
18
1
11
13
6
19
2
16
21
17
9
14
12
Part of #4
15
8
N
4
7
A-02535
5
3
10
NOTE: Illustration may vary
slightly from actual unit
Manual 0-2747
47
SECTION 6: PARTS LISTS
6.08 Right Side Internal Component Replacement Parts List
Item #
Qty
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
1
2
1
1
1
1
1
1
1
1
1
2
1
1
1
1
1
1
Description
BULKHEAD ADAPTER, O2B - 1/8 NPT
9/16-18 JAM NUT, BRASS
HEATSINK, INPUT BRIDGE (SHOWN WITH PAD)
CHASSIS, CENTER
PANEL, PILOT ASS’Y MOUNTING
BRKT, BULKHEAD MOUNTING
INSULATOR, BULKHEAD
PCR RELAY, DPST-NO, 25A @ 250V, 12VDC COIL
TRANSFORMER, AUX., IEC BOBBIN
ASS’Y, MAIN TRANSFORMER,
ASS’Y, OUTPUT INDUCTOR,
FITTING, 1/8 NPT X 1/4 TUBE STR
COIL, PILOT INDUCTOR,
COIL, CD XFMR,SECONDARY
ASS’Y, CD PCB
ASS’Y, PILOT/OUTPUT PCB
FAN, 115V, 50/60HZ, 95/115CFM W/.187 TABS
DUST COVER, PCR RELAY
Reference#
Catalog #
PCR
T2
T1
L1
9-4045
8-2149
See Note 1
See Note 1
See Note 1
See Note 1
See Note 1
8-3163
9-7541
9-7520
9-7521
8-3360
9-7596
9-7618
9-7517
9-7518
8-3209
8-3164
L2
T3
NOTE: Item shown for illustration purposes only.
SECTION 6: PARTS LISTS
48
Manual 0-2747
H
9
11
4
A
H
15
F
C
10
C
C
C
3
5
G
6
16
14
18
12
17
A-02567
2
1
7
13
NOTE: Illustration may vary slightly
from actual unit
Manual 0-2747
49
8
A
B
C
D
HARDWARE
#10-32 Regular Nylon Lock Nut
#10-32 x 2" PPH HDMS
#10-32 x 0.5" PPH Sw ageform Stl Zn Screw
1/4-20 x 3" Screw , Soc HD
E
F
G
H
I
J
#6-32 x 3 1/2" THD Screw
#10-32 x 3/4" PPH Sw ag Screw
#6-32x3/8 PPH STL ZN Screw
Rubber Feet
#6-32x3 3/4 LG PH Screw
#10-32 Keput w /Star Washer
SECTION 6: PARTS LISTS
6.09 Options and Accessories
Qty
Description
1
1
1
1
1
1
1
1
1
1
1
1
SMART CART
575V TRANSFORMER
CUTTING GUIDE KIT
FILTER KIT “DRY AIR” – INCLUDES FILTER AND HOSE - OPTIONAL
REPLACEMENT FILTER BODY “DRY AIR”
REPLACEMENT FILTER ELEMENT “DRY AIR”
REPLACEMENT FILTER HOSE “DRY AIR”
BRACKET, LAMAN FILTER MOUNTING - OPTIONAL
TWO STAGE AIR LINE FILTER KIT - OPTIONAL
DUAL STAGE AIR FILTER ASSEMBLY
REPLACEMENT FIRST STAGE FILTER
REPLACEMENT SECOND STAGE FILTER
COMPUTER CONTROL CABLE (CNC)
25 FOOT (7.6 m)
50 FOOT (15.2 m)
HAND PENDANT CONTROL WITH 25 ft. (15.2 m) CABLE
HAND PENDANT EXTENSION CABLE - 25 FT. (15.2 m)
METAL MOUNTING TUBE WITH PINION ASSEMBLY
1
1
1
1
Catalog #
7-7777
9-7500
7-8910
7-7507
9-7740
9-7741
9-7742
9-7535
7-7500
9-7527
9-1021
9-1022
8-5557
8-5558
7-3114
7-7744
7-7745
Housing
Filter
Element
Spring
Assembled Filter
Cover
Barbed
Fitting
A-02476
Dry Air Filter Assembly
SECTION 6: PARTS LISTS
50
Manual 0-2747
APPENDIX I: INPUT WIRING REQUIREMENTS
Input
P ower Input
V oltage
Freq.
1-Ph
3-Ph
(V olts)
208
230
240
380
415
460
(Hz)
50/60
50/60
50/60
50/60
50/60
50/60
(kVA)
12.5
12.5
12.6
13.9
13.9
13.9
(kVA)
11.2
11.3
11.4
12.4
12.6
12.7
575
Current
1-Ph
S uggested S izes (See Notes)
3-Ph
(Amps) (Amps)
60
31.1
54.1
28.3
52.3
27.5
36.5
18.9
33.4
17.5
30.1
16
Fuse (Amps)
1-Ph
70
70
60
45
40
35
3-Ph
40
35
35
25
25
25
W ire (AW G)
1-Ph
4
4
6
8
8
8
3-Ph
8
8
8
10
12
12
W ire (Canada)
1-Ph
4
4
6
8
8
8
3-Ph
8
8
8
10
12
12
Requires Transform er M odule
Line V oltages with Suggested Circuit P rotection and W ire S izes
B ased on National Electric Code and Canadian Electrical Code
NOTES
Refer to Local and National Codes or local authority having jurisdiction for proper wiring requirements.
Cable size is de-rated based on the Duty Cycle of the equipment.
The suggested sizes are based on flexible power cable with power plug installations. For hard-wired installations
refer to local or national codes.
Cable conductor temperature used is 167° F (75° C).
An energy limiting fuse UL Class RK-1 (examples: BUSS LPS/LPN-RK or Gould-Shawmut AZK-A6K) should be
used to minimize damage to Plasma Cutting, Welding or power distribution equipment.
NEVER use replaceable element fuses like UL Class H, or "one-time" fuses like UL Class K5.
Flexible cable must have an outside diameter of 0.69 inches (17.5 mm) or greater.
Manual 0-2747
51
APPENDIX
APPENDIX II: SEQUENCE OF OPERATION
(BLOCK DIAGRAM)
LATCH
ACTION
ACTION
ACTION
ACTION
Close external
disconnect switch.
ON/OFF switch
to ON.
RUN/SET/LATCH switch
to SET.
RUN/SET/LATCH
switch to RUN.
RESULT
RESULT
RESULT
RESULT
Power to system.
AC indicator blinks for 8
seconds then steady on.
Fans on.
Power circuit ready.
Gas solenoid open,
gas flows to set pressure.
GAS indicator on.
Gas flow stops.
GAS indicator off.
ACTION
ACTION
Protect eyes and
activate torch
Torch moved away
from work (while
still activated).
RESULT
RESULT
Gas flows (2 seconds).
Main arc stops.
Pilot arc automatically
restarts.
PILOT ARC
After gas pre-flow:
DC indicator on.
Pilot relay closes.
Pilot arc established
ACTION
Torch moved within
transfer distance of workpiece.
RESULT
ACTION
Main arc transfer.
Pilot arc off.
Torch deactivated (by torch switch
release or by remote device).
RESULT
Main arc stops.
(Power supply enable signal removed.)
Gas flows (15 seconds)
NOTE - If torch is activated during
post-flow, pilot arc will immediately restart.
If torch is within transfer distance (3/8 in) of
workpiece, main arc will transfer.
After post-flow:
Gas solenoid closes, gas flow stops.
GAS indicator off.
APPENDIX
ACTION
ON/OFF switch
to OFF
RESULT
All indicators off.
Power supply fans off.
52
ACTION
Torch Switch
can be released.
RESULT
Transfer will continue
until torch is removed
from workpiece.
ACTION
Open external
disconnect.
RESULT
No power to system.
A-02461
Manual 0-2747
APPENDIX III: POT/LED PC BOARD LAYOUT
J14
D4
D5
D7
D6
A-01206
Pot/LED PC Board Signals
J14-1
J14-2
J14-3
J14-4
J14-5
J14-6
J14-7
J14-8
+10 vdc from Logic/Gate/Gate PC Board (J3-7)
Current Control to Logic/Gate PC Board (J3-8)
Return for Current Control from Logic/Gate PC Board (J3-9)
18VDC Unregulated from Logic/Gate PC Board (J3-10)
Active Low Signal for AC OK Indicator to Logic/Gate PC Board (J3-11)
Active Low Signal for GAS Indicator to Logic/Gate PC Board (J3-12)
Active Low Signal for TEMP Indicator to Logic/Gate PC Board (J3-13)
Active Low Signal for DC Indicator to Logic/Gate PC Board (J3-14)
D4
D5
D6
D7
Front Panel AC Indicator
Front Panel TEMP Indicator
Front Panel DC Indicator
Front Panel GAS Indicator
Manual 0-2747
53
APPENDIX
APPENDIX IV: LOGIC/GATE PC BOARD LAYOUT
TP24
TP25
TP21
TP18
TP2
TP5
TP1
TP8
TP7
A-02528
Logic/Gate PC Board
TP22
TP20
Logic/Gate PC Board Signals
J3-5
J1-1
J1-2
J1-3
J1-4
J1-5
J1-6
36 VAC from Auxiliary Transformer
115 VAC from Auxiliary Transformer
Center Tap from Auxiliary Transformer (36VAC)
Not Used
36 VAC from Auxiliary Transformer
115 VAC Return from Auxiliary Transformer
J2-1
J2-2
J2-3
J2-4
J2-5
J2-6
J2-7
J2-8
J2-9
J2-10
J2-11
J2-12
J2-13
J2-14
J2-15
J2-16
J3-6
J3-7
J3-8
J3-9
J3-10
J3-11
J3-12
J3-13
J3-14
J3-15
J3-16
115 VAC Return to K10 Relay/Contactor MC1
115 VAC Return to Fan #1
115 VAC Return to Fan #2
115 VAC Return to Solenoid
Not Used
Not Used
115 VAC to K10 Relay/MC1 Contactor
115 VAC to Fan #1
115 VAC to Fan #2
115 VAC to Solenoid
Not Used
Not Used
Logic Low -Pressure Switch Signal
Return from Pressure Switch
Logic Low -Over Temperature Switch on Input Bridge
Over Temperature Switch Return
J3-1
J3-2
J3-3
J3-4
36 VAC to ON/OFF Switch
36 VAC from ON/OFF Switch to Logic/Gate PC Board
36 VAC to ON/OFF Switch
36 VAC from ON/OFF Switch to Logic/Gate PC Board
APPENDIX
TP23
54
TP26
Logic LowFrom RUN/SET/LATCH Switch
on Front Panel (RUN)
PCB Common
+10 vdc to Front Panel Current Control Pot J14-1
From Front Panel Current Control Pot Wiper J14-2
To Current Control Pot J14-3 (Return)
Unregulated +18 VDC to Front Panel J14-4
Logic Low for AC Indicator on Front Panel (J14-5)
Logic Low for GAS Indicator on Front Panel (J14-6)
Logic Low for TEMP Indicator on Front Panel (J14-7)
Logic Low for DC Indicator on Front Panel (J14-8)
Not Used
Logic Low - From RUN/SET/LATCH Switch on
Front Panel (LATCH)
Manual 0-2747
J5-1
J5-2
J5-3
J5-4
J5-5
J5-6
J5-7
J5-8
J5-9
J5-10
J5-11
J5-12
J5-13
J5-14
J5-15
J5-16
36 VAC to CD PC Board (J11-1)
36 VAC Centertap CD PC Board (J11-2)
36 VAC to CD PC Board (J11-3)
Logic Low - CD Enable Signal to CD PC Board (J11-4)
CD Enable Return to CD PC Board (J11-5)
Unregulated +18 vdc to PCR Relay
Logic Low - PCR Signal to PCR Relay
Logic Low - Torch Switch Input from Pilot/Output PCB (J13-1)
Torch Switch Return to Pilot/Output PC Board (J13-2)
Logic Low - OK-To-Move Signal to Pilot/Output PC Board (J13-3)
Unregulated +18 VDC for OK-To-Move (CSR) Relay on Pilot/Output PC Board (J13-4)
PS (+) from Pilot/Output PCB to Sense Positive Output Voltage
Not Used
PS From Pilot/Output PC Board to Sense Drag Cutting (Tip)
Not Used
PS(-) from Pilot/Output PC Board to Sense Negative DC Output Voltage
J10-1
J10-2
Logic Low - MC1 Contactor to Input PC Board (J16-1)
Unregulated +18 VDC to Input PC Board for K11 Relay on Input PCB
J7
J7
J7
J7
J7
J7
J7
J7
J7
LED Description
D1
D2
D20
D36
D39
D45
J8
J8
J8
J8
J8
J8
J8
J8
J17-1
J17-2
J17-3
Logic Low - CSR Signal from Current Sensor
Return for CSR Signal
+12 VDC to Current Sensor
TP1
TP2
TP3
TP4
TP5
TP6
TP7
TP8
Logic Ground
Unregulated +18 VDC
Unregulated +18 VDC
Not Used
+12VDC
+12VDC
Drag Circuit Disable jumper to TP1)
Negative Voltage Sensuing -jumper to TP1
to override)
TP20
Primary OverCurrent Shutdown - logic low
(momentary)
Logic Low - CSR Input
Current Demand Signal
Gate Drive Signal A
Gate Drive Signal B
TP26
TP22
TP25
TP24
Manual 0-2747
55
Torch Start
CD Enable
CSR
Drag On Indicator
Pilot
PWM enabled
APPENDIX
APPENDIX V: PILOT OUTPUT PC BOARD LAYOUT
J13
CGND
Top
E27
E24
J12
E23
E7
A-01389
E9
E8
E10
E29
E30
E20
E22
Pilot Output PC Board Signals
J12-1
J12-2
J12-3
J12-4
J12-5
J12-6
J12-7
J12-8
J12-9
J12-10
Torch Switch Filter in from J22-3 Torch Control
Not Used
Torch Switch Filter Return from J22-4 Torch Control
Not Used
Pilot Return Shield to J22-1 Torch Control
Torch Switch Shield to J22-2 Torch Control
Not Used
OK to Move TO J22-12
Not Used
OK to Move RTN TO J22-14 Torch Control
J13-1
J13-2
J13-3
J13-4
J13-5
J13-6
J13-7
J13-8
J13-9
J13-10
Torch Switch Filter out to J5-8 Logic Board Torch Sw
Torch Switch Filter gnd out to J5-9 Logic Board Torch Sw gnd
OK to Move Relay Coil to Logic PCB J5-10 OK to Move
OK to Move Relay Coil to Logic PCB J5-11 +25V
PS(+) to Logic Board J5-12 Output Sense Gnd
Not Used
Tip Voltage Sense to Logic Board J5-14 Drag Sense
Not Used
PS(-) Sense to Logic Board J5-16 PS(-) Sense (DC and Off the Plate)
Not Used
APPENDIX
56
Manual 0-2747
CGND
E7
E8
E9
E10
E20
E22
E23
E24
E27
E29
E30
Chassis Gnd
PS(-) (Stud) from Output Inductor L1 to CD Xfmr
PS(-) C4 Rtn for Pilot Voltage Twisted with Pilot RTN to E23
PS(+) to E18 Upper Fet Module
PS(+) to E18 Upper Fet Module
From E22 to PCR Pin 2
From Pilot Choke to E20
C4 Rtn for Pilot Voltage Twisted with Pilot RTN from E8
Pilot RTN from Standoff on bulk head and Torch Cable
Pilot RTN to Pilot Choke
PS(+) (Stud) from Work lead Through Current Sense To E18 Fet Modules
PS(+) to CSR 8
Manual 0-2747
57
APPENDIX
APPENDIX VI: CD PC BOARD LAYOUT
TP2
TP1
J11
TP3
A-01208
E2
E1
CD PC Board Signals
J11-1
J11-2
J11-3
J11-4
J11-5
J11-6
J11-7
J11-8
36 VAC from Logic PC Board (J5-1)
Return from Logic PC Board (J5-2)
36 VAC from Logic PC Board (J5-3)
CD Enable Signal from Logic PC Board (J5-4)
Return for CD Enable Signal from Logic PC Board (J5-5)
Not Used
Not Used
Not Used
TP1
TP2
TP3
Logic Ground or Return
+12 VDC
Not Used
E1
E2
CD output
CD Output
APPENDIX
58
Manual 0-2747
APPENDIX VII: INPUT PC BOARD LAYOUT
J16
2-position connector
Solder Side of PC Board
Component Side of PC Board
Input PC Board
A-02551
AC1
AC2
AC3
CGND
Input PC Board Signals
J16-1
J16-2
J16-3
J16-4
J16-5
Gate Drive Relay Rtn from Logic Board J10-1
Gate Drive Relay Pos from Logic Board J10-2
Not used
Not used
Not used
CGND
R2
G
(+)
(-)
AC1
AC2
AC3
E31
Chassis Ground to Chassis Ground
Rectifier (+) to Rectifier (+)
SCR Gate to SCR Gate
SCR Cathode Module (+) Output to the Inrush Choke Assembly
Rectifier (-) Module (-) Output to the Cap Board (-) E26
AC Input Phase 1 from the contactor T1 and T4
AC Input Phase 2 from the contactor T2
AC Input Phase 3 from the contactor T3
Output of Inrush Choke Assembly to the Cap Board (+) E25
Manual 0-2747
59
APPENDIX
APPENDIX VIII: FET PC BOARD LAYOUT
E19
E1
E17
E15
E18
Component side of PC Board
E15
E14
E14
E16
E12B
E19
E17
E13C
E18
A-02630
E16
APPENDIX
Solder Side of PC Board
60
Manual 0-2747
FET PC Board Signals (Upper and Lower Assemblies)
J6-1
J6-2
J6-3
J6-4
J6-5
J6-6
J6-7
J6-8
J6-9
J6-10
+12V from the Gate Drive Board upper J7-1 Lower J8-1
+12V RTN from the Gate Drive Board upper J7-2 Lower J8-2
Pwm Output from the Gate Drive Board upper J7-3 Lower J8-3
Pwn Output RTN J6-2 from the Gate Drive Board upper J7-4 Lower J8-4
PRI CURRENT SENSE to the Gate Drive Board upper J7-5 Lower J8-5
PRI CURRENT SENSE RTN to the Gate Drive Board upper J7-6 Lower J8-6
SEC CURRENT SENSE to the Gate Drive Board upper J7-7 Lower J8-7
SEC CURRENT SENSE RTN to the Gate Drive Board upper J7-8 Lower J8-8
OVER TEMP RTN to the Gate Drive Board upper J7-9 Lower J8-9
OVER TEMP to the Gate Drive Board upper J7-10 Lower J8-10
E1
E14
E15
E16
E17
E18
E19
E12B
E13C
HEATSINK GND To HEAT SINK
MAIN XFMR PRI to MAIN XFMR PRI E14
MAIN XFMR PRI to MAIN XFMR PRI E15
MAIN XFMR SEC from MAIN XFMR SEC E16
OUTPUT (-) to OUTPUT INDUCTOR L1
OUTPUT (+) to Current Sense Transformer, E9 on Output Board, and pin 8 PCR
MAIN XFMR SEC from MAIN XFMR SEC E19
MAIN CAPACITOR PLUS
MAIN CAPACITOR MINUS
Manual 0-2747
61
APPENDIX
APPENDIX IX: CAPACITOR PC BOARD LAYOUT
E13B
E13
E12B
E12A
A-02633
E13
E14
E13C
E12C
Capacitor PC Board Signals
E12
E12A
E12B
E12C
E13
E13A
E13B
E13C
E25
E26
Positve Rail to FET Board
Positve Rail to FET Board
Positve Rail to FET Board
Positve Rail to FET Board
Negative Rail to FET Board
Negative Rail to FET Board
Negative Rail to FET Board
Negative Rail to FET Board
Positive Input from Input Board (+) SCR Cathode
Negative Input from Input Board (-) Rectifier (-)
APPENDIX
62
Manual 0-2747
APPENDIX X: 36VAC CIRCUIT DIAGRAM
CD PC Board
J11 2 3 1
J5 2
3
1
Logic/Gate
Drive PC
Board
12 VDC
Circuit
J1
3
Auxiliary
Transformer
Outputs
36 VAC
115 VAC
1
5
2
6
J3 1
3
4
2
A-02527
ON/OFF
Switch
Manual 0-2747
63
APPENDIX
APPENDIX XI: SYSTEM SCHEMATIC
INRUSH
GAS
GAS
SOL
13
16
INRUSH
9
J21
J20
J19
A-02503
APPENDIX
64
Manual 0-2747
OK TO
MOVE
OK
8/11/99
A-02503
Manual 0-2747
65
APPENDIX
APPENDIX
66
Manual 0-2747
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