BOC Smootharc TIG 185 DC User manual

TIG 185 DC
Service manual

Ver.1 Rev.1 . 0314
•
Important Notice
ThisdocumenthasbeenpreparedbyBOCLimitedABN95000029729(‘BOC’),
asgeneralinformationanddoesnotcontainandisnottobetakenascontaining
anyspecicrecommendation.Thedocumenthasbeenpreparedingoodfaith
andisprofessionalopiniononly.Informationinthisdocumenthasbeenderived
fromthirdparties,andthoughBOCbelievesittobereliableasatthetimeof
printing,BOCmakesnorepresentationorwarrantyastotheaccuracy,reliability
orcompletenessofinformationinthisdocumentanddoesnotassumeany
responsibilityforupdatinganyinformationorcorrectinganyerrororomission
whichmaybecomeapparentafterthedocumenthasbeenissued.NeitherBOC
noranyofitsagentshasindependentlyveriedtheaccuracyoftheinformation
containedinthisdocument.Theinformationinthisdocumentiscommercial
incondenceandisnottobereproduced.Therecipientacknowledgesand
agreesthatitmustmakeitsownindependentinvestigationandshould
considerseekingappropriateprofessionalrecommendationinreviewingand
evaluatingtheinformation.Thisdocumentdoesnottakeintoaccountthe
particularcircumstancesoftherecipientandtherecipientshouldnotrelyon
thisdocumentinmakinganydecisions,includingbutnotlimitedtobusiness,
safetyorotheroperationsdecisions.Exceptinsofarasliabilityunderanystatute
cannotbeexcluded,BOCanditsafliates,directors,employees,contractors
andconsultantsdonotacceptanyliability(whetherarisingincontract,tortor
otherwise)foranyerrororomissioninthisdocumentorforanyresultingloss
ordamage(whetherdirect,indirect,consequentialorotherwise)sufferedby
therecipientofthisdocumentoranyotherpersonrelyingontheinformation
containedherein.TherecipientagreesthatitshallnotseektosueorholdBOC
ortheirrespectiveagentsliableinanysuchrespectfortheprovisionofthis
documentoranyotherinformation.
Warranty Information
Terms of Warranty
BOCprovidesawarrantyfortheSmootharcTIG185
DCmachinesoldagainstdefectsinmanufacture
andmaterials.
•Validfor18monthsfromdateofpurchase.
•AnauthorisedBOCServiceAgentmustcarryout
warrantyrepairs.
•Freight,packagingandinsurancecostsaretobepaidfor
bytheclaimant.
•Noadditionalexpresswarrantyisgivenunlessinwriting
signedbyanauthorisedmanagerofBOC.
•Thiswarrantyisinadditiontoanyotherlegalrightsyou
mayhave.
Limitations on warranty
Thefollowingconditionsarenotcovered:
•Noncompliancewithoperatingandmaintenance
instructionssuchasconnectiontoincorrectfaulty
voltagesupplyincludingvoltagesurgesoutside
equipmentspecs,andincorrectoverloading.
•Naturalwearandtear,andaccidentaldamage.
•Transportorstoragedamage.
TheWarrantyisvoidif:
•Changesaremadetotheproductwithouttheapproval
ofthemanufacturer.
•Repairsarecarriedoutusingnon-approvedspareparts.
•Anon-authorisedagentcarriesoutrepairs.
Warranty repairs
BOCortheirAuthorisedServiceAgentmustbeinformed
ofthewarrantydefects,andtheproductreturnedwithin
thewarrantyperiod.
•Beforeanywarrantyworkisundertaken,thecustomer
mustprovideproofofpurchaseandserialnumberofthe
equipmentinordertovalidatethewarranty.
Thepartsreplacedunderthetermsofthewarranty
remainthepropertyofBOC.
Modification of the 15A primary input plug or fitment
of a lower rated primary input plug will render the
warranty null and void.
Recommended Safety Precautions
Electrical Shock
•Nevertouch‘live’electricalparts.
•Alwaysrepairorreplacewornordamagedparts.
•Disconnectpowersourcebeforeperformingany
maintenanceorservice.
•Earthallworkmaterials.
•Neverworkinmoistordampareas.
Avoid electric shock by:
•Wearingdryinsulatedboots.
•Wearingdryleathergloves.
•Workingonadryinsulatedoorwherepossible.
Ver.1 Rev.1 . 10132BOC Smootharc TIG185 DC Service manual

Ver.1 Rev.1 . 0314
Contents.
1.0 Fundamental schematic and circuit diagrams 4
1.1 General wiring diagram 4
1.2 First rectifier board schematic 5
1.3 First rectifier board circuit diagram 6
1.4 Aux. module board schematic 7
1.5 Aux. module board circuit diagram 7
1.6 U10 drive module board schematic 8
1.7 U10 drive module board circuit diagram 8
1.8 U9 control module board schematic 9
1.9 U9 control module board circuit diagram 10
1.10 U8 pulse control module schematic 11
1.11 U8 pulse control module board circuit diagram 12
1.12 Second rectifier board schematic 13
1.13 Second rectifier board circuit diagram 13
1.14 Filtering, high frequency board circuit diagram 14
2.0 Troubleshooting and maintenance 16
3.0 Exploded view and component parts list 17
3.1 Exploded view 17
3.2 Component parts list for Smootharc TIG 185 DC 18
Ver.1 Rev.1 . 1013 3BOC Smootharc TIG185 DC Service manual

Ver.1 Rev.1 . 03144BOC Smootharc TIG185 DC Service manual
1.1 General wiring diagram
1.0 Fundamentalschematicandcircuitdiagrams

Ver.1 Rev.1 . 0314
1.2 First rectifier board schematic
Ser. No. Pin Description
CON1 1 Undergasdelay,theoutputis24VwhenTIG
works
2 Controlworksthesignal,outputthehigh
frequencywhenTIG
3GND
4 DC24V
CON2 1 Pin1andPin2isshortfrequencywhenTIG
workscircuit,outputhigh
2
CON3 1 2T°XHighfrequency12V°A4T---Lowfrequency0V
2 DC12V
CON4 1 ConnecttogroundbyPTC-12
2 NC
3Highfrequency
CON5 1 Pin1andPin3connecttotheTIGtorch,Pin2
andPin3connecttotheMMAtorch
2
3
4 NC
CON6 1 GND
2 Theratedvoltageisadjustable
3Providepowersupplytothepotentiometer
CON7 1 GND
2 Currentfeedback
3Voltagefeedback
CON8 1 Connecttotheattenuationpotentiometer
2
3WhenconnecttoPin4,Itislowvoltage
4 GND
5 WhenconnecttoPin4,itismiddlevoltage
CON9 1 Connecttothethermalswitch,connecttothe
groundwhenover-heatworks
2 GND
Ser. No. Pin Description
CON10 1 DC24V
2 Thisportconnecttotheover-heatindicator
CON11 1 GND
2 Connecttothepowerindicator,thispinishigh
voltage
CON12 1 GND
2 GND
3DC5V
4 Thesignalterminalofthedigitalmeter
CON13 NC
CON14 1 GND
2 GND
3GND
4 NC
5 DC340V
6 DC340V
7 DC340V
CON15 1 Pin1andPin3outputACwave(+340Vand
-340V)
2 NC
3Pin1andPin3outputACwave(+340Vand
-340V)
CON16 1 InverterACoutput
2 InverterACoutput
3InverterACoutput
4 NC
5 InverterACoutput
6 InverterACoutput
7 InverterACoutput
CON17 1 Lowvoltage
2 Thesignalterminalofthedigitalmeter
3Thepowerterminalofthedigitalmeter
5BOC Smootharc TIG185 DC Service manual

Ver.1 Rev.1 . 0314
1.3 First rectifier board circuit diagram
6BOC Smootharc TIG185 DC Service manual

Ver.1 Rev.1 . 0314
Pin Description
1 ConnecttotheMOS“S”
3 DC24Vturnon/off
5 DC24VStart
7 GND
9 DC24VandShutoff
12 GND
14 OutputDC24V
1.4 Aux. module board schematic
1.5 Aux. module board circuit diagram
7BOC Smootharc TIG185 DC Service manual

Ver.1 Rev.1 . 0314
Pin Description
1 MOSoutput
2
1.6 U10 drive module board schematic
1.7 U10 drive module board circuit diagram
8BOC Smootharc TIG185 DC Service manual

Ver.1 Rev.1 . 0314
1.8 U9 control module board schematic
9BOC Smootharc TIG185 DC Service manual
Pin Description
1 DC+12V
2 GND
3 Notused
4 VoltageFeedback
5 2T/4TPresetControl
6 GivenControl
7 Notused
8 Notused
9 GND
10 GND
11 Over-currentProtectionMonitoring
12 GND
13 Over-heatProtectionMonitoring
14 GND
15 DC+24V
16 Notused
17 GND
18 SG3525ShutdownControl
19 GND
20 GND
21 DC+24V
22 GND
23 SPWMOutput
24 GND
25 SPWMOutput
26 Notused
27 SPWMOutput
28 GND
29 SPWMOutput
30 DC+24V
31 GND

Ver.1 Rev.1 . 0314
1.9 U9 control module board circuit diagram
10 BOC Smootharc TIG185 DC Service manual