Miller Electric TM-353E manual

6-2. Troubleshooting Circuit Diagram For Welding Power Source

YDisable high frequency by placing High Frequency switch S2 in Off position before testing unit.

R1

R1

R1	V3
	V3
	V2

			V25
	V1
			V11
	V4
	V5
			R1
			V10
	V6	V9
	V6	V8
		V8
		V7
		Link 1	Link 2
	V13
		V12
		V14	V17
TD1 begins to time out
when CR5 deenergizes
TD3 begins to time out	V15	V16
when CR4 energizes			CR2 energizes when
			CR2 energizes when
See Figure 9-19			remote contactor
See Figure 9-19			switch closes
for PC3 circuit
CR3 energizes during spot time	CR4 energizes when remote contactor
when an arc is detected	switch closes		See Section 3-8

	See Section 6-6	for RC1
	for PC2 data
		information

TM-353 Page 26

Syncrowave 250

Image 30

Miller Electric TM-353E manual Troubleshooting Circuit Diagram For Welding Power Source

Contents

SyncrowaveR Table of Contents Declaration of Conformity For European Community CE Products Page Marks a special safety message Safety Precautions for ServicingSymbol Usage Servicing Hazards EMF Information About Pacemakers + + + Definitions ISO/IEC Rating Label For CE Products Symbols And Definitions Some symbols are found only on CE products Volt-Ampere Curves InstallationSpecifications 220 230 260 380 415 460 Duty Cycle And Overheating 60% Duty Cycle At 200 AmperesOverheating Dimensions And Weights Selecting a LocationMovement Location And Airflow Weld Output Terminals And Selecting Cable Sizes Be careful when placing or moving unit over uneven surfacesTipping ARC Welding can cause Electromagnetic Interference Volts AC Duplex Receptacle And Shielding Gas Connections Turn Off power before connecting to receptacleRemote 14 Receptacle Socket Electrical Service Guide All values calculated at 60% duty cycle Placing Jumper Links And Connecting Input Power Check label inside your unit- only one label is on unit Operation Controls Output Selector Switch Meters Crater Time Controls Spot Time ControlsApplication Setting Output Waveforms AC Balance ControlBalance Control AC Gtaw Amperage Adjustment Controls Output Contactor Control Switch Arc Controls Postflow Time ControlFor AC And DC Smaw Welding High Frequency Controls Preflow Time Control Optional Theory of Operation SCR HD1 Troubleshooting Troubleshooting Table Necessary parts Dition of contacts. Replace CR5 if necessary Contacts. Replace CR2 if necessary Troubleshooting Circuit Diagram For Welding Power Source V24 See -1 forHD1 location D, E Waveforms For Section Gnd AC Output, 100 Amperes, 24 Volts AC Re- sistive Load Control Board PC1 Testing Information Use With Section Control Board PC1 Test Point Values Reference for gate pulse to SCR4 RC54 Not used Receptacle Pin Value Remote Board PC2 Testing Information Use With Section RC3 Meter Calibration Input Voltage Labels And Connections Months MaintenanceRoutine Maintenance Circuit Breaker CB1 Adjusting Spark Gaps Turn Off power before adjusting spark gapsFuses F1 And F2 Welding Processes Using HF Sources Of HF Radiation From Incorrect InstallationHigh Frequency HF Correct Installation Electrical Diagrams Model Serial Or Style Number Circuit Diagram Wiring Diagram SC-114 SC-120 SC-121 SC-124 SC-124 785-B SC-132 697-A SC-137 SC-135 SC-142 SC-148 SC-154 649-C SC-178 SC-179 303-A SC-181 109-E SC-188 161-A Syncrowave TM-353 TM-353 SD-188 162-A TM-353 SD-187 644 1 TM-353 SD-187 644 2 SA-121 SA-044 725-C TM-353 Description Parts List Main Assembly PLG51 114 BASE, Prior to KE727074 170 Panel, Front w/Components Panel, Front w/ Components Rectifier, Si Diode -1 Item Panel, Mtg Components -1 Item Control Panel, Lower Front 126 Capacitor ASSEMBLY, Eff w/JK537589 thru JK690986 C14 124 COIL, HF coupling Eff w/JK572898 thru KF959378 174 Optional Equipment Page Miller