Lincoln Electric IDEALARC SP-250 Service Manual Download Page 74

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F-27

TROUBLESHOOTING & REPAIR

F-27

IDEALARC SP-250

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TEST POINTS

KEY PRESSED

MAXIMUM ALLOWABLE

RESISTANCE

(TYPICAL RESISTANCE)

FROM PIN

TO PIN

1J2

6J2

CENTER UP ARROW

100 OHMS (30 TYPICAL)

1J2

8J2

CENTER DOWN ARROW

100 OHMS (30 TYPICAL)

1J2

2J2

MEMORY 3

100 OHMS (30 TYPICAL)

1J2

4J2

SWITCH SET DISPLAY

100 OHMS (30 TYPICAL)

2J2

9J2

MEMORY 5

100 OHMS (30 TYPICAL)

2J2

7J2

MEMORY 4

100 OHMS (30 TYPICAL)

2J2

3J2

MEMORY 2

100 OHMS (30 TYPICAL)

2J2

5J2

MEMORY 1

100 OHMS (30 TYPICAL)

3J2

6J2

LEFT UP ARROW

100 OHMS (30 TYPICAL)

3J2

8J2

LEFT DOWN ARROW

100 OHMS (30 TYPICAL)

3J2

4J2

SPOT

100 OHMS (30 TYPICAL)

4J2

9J2

TOGGLE

100 OHMS (30 TYPICAL)

4J2

7J2

IMP VOLTS

100 OHMS (30 TYPICAL)

4J2

5J2

TIMERS OFF

100 OHMS (30 TYPICAL)

5J2

6J2

AUTO

100 OHMS (30 TYPICAL)

5J2

8J2

PROCESS WIRE/GAS

100 OHMS (30 TYPICAL)

6J2

9J2

MANUAL

100 OHMS (30 TYPICAL)

6J2

7J2

RIGHT UP ARROW

100 OHMS (30 TYPICAL)

7J2

8J2

RIGHT DOWN ARROW

100 OHMS (30 TYPICAL)

8J2

9J2

SAVE

100 OHMS (30 TYPICAL)

SP-250 KEYPAD RESISTANCE TEST

TABLE F.1 - SP-250 KEYPAD RESISTANCE TESTS

NOTE: THERE SHOULD NOT BE CONTINUITY BETWEEN PINS UNTIL A KEY IS PRESSED ON THE KEYPAD.

Summary of Contents for IDEALARC SP-250

Page 1: ...built with safety in mind However your overall safety can be increased by proper installation and thoughtful operation on your part DO NOT INSTALL OPERATE OR REPAIR THIS EQUIPMENT WITHOUT READ ING THI...

Page 2: ...ol 1 c In semiautomatic or automatic wire welding the electrode electrode reel welding head nozzle or semiautomatic welding gun are also electrically hot 1 d Always be sure the work cable makes a good...

Page 3: ...ing area If this is not possible cover them to prevent the welding sparks from starting a fire Remember that welding sparks and hot materials from welding can easily go through small cracks and openin...

Page 4: ...ell ventilated areas or vent the engine exhaust fumes outdoors ____________________________________________________ 7 c Do not add the fuel near an open flame welding arc or when the engine is run nin...

Page 5: ...availlant proximit au soudage l aide d crans appropri s et non inflammables 4 Des gouttes de laitier en fusion sont mises de l arc de soudage Se prot ger avec des v tements de protection libres de l h...

Page 6: ...Controls and Settings B 5 B 9 Operating Steps B 10 B 14 Accessories Section C Options Accessories C 1 Maintenance Section D Safety Precautions D 1 Routine and Periodic Maintenance D 1 Component Locat...

Page 7: ...re Sizes A 3 Input Power Connections and Ground Connections A 3 Connect Shielding Gas A 4 Reconnect Procedure A 5 Connect Output Components A 7 A 9 Install the Work Clamp A 7 Output Polarity Connectio...

Page 8: ...Copper conduit AWG Ground Wire in Conduit IEC Sizes Runs to Runs over 100ft 30m 100ft 30m 208 60 60 8 10mm2 6 16mm2 10 6mm2 230 60 60 10 6mm2 8 10mm2 10 6mm2 460 60 30 14 2 5mm2 12 4mm2 10 6mm2 575 60...

Page 9: ...UT CONNECTIONS All input power must be electrically disconnected before proceeding ____________________________________ A 2 INSTALLATION IDEALARC SP 250 A 2 1 Before starting the installation check wi...

Page 10: ...ct Panel Access Door 2 Use a single phase line or one phase of a three phase line For the 208V 230V 60 HZ model SP 250 shipped with a 10 ft input cord and plug connected to the welder mount the matchi...

Page 11: ...the cylinder valves for damaged threads dirt dust oil or grease a Remove dust and dirt with a clean cloth NOTE DO NOT ATTACH THE REGULATOR IF OIL GREASE OR DAMAGE IS PRESENT Inform your gas supplier o...

Page 12: ...voltage listed on the machine s rating plate Before installing the machine check that the Reconnect Panel in the Input Box Assembly is con nected for the proper voltage Failure to follow these instruc...

Page 13: ...AL WHERE THE TRANSFORMER INPUT LEAD IS CONNECTED 2 SHIFT THE TRANSFORMER INPUT LEAD TO THE TERMINAL THAT THE UNIT IS TO OPERATE ON AND FASTEN SECURELY WITH THE HEX NUT REMOVED IN STEP1 MAKE CERTAIN TH...

Page 14: ...l GUN LINER CONTACT TIP INSTALLATION The Magnum 250 SP gun and cable provided with the SP 250 is factory installed with a liner for a 035 or 045 0 9 or 1 2mm diameter electrode and an 035 0 9mm contac...

Page 15: ...umb switch functions available on the Magnum 250 SP gun will only be operable from the front panel keypad The gun trigger switch must be capable of switching 5 milliamps at 15 volts DC resis tive FIGU...

Page 16: ...pability B 4 Limitations B 4 B 9 Controls and Settings B 5 B 9 Power Switch B 5 Set Up Arrow Keys B 5 Process Wire Gas Key B 5 Auto Key B 7 Manual Key B 7 Save Key B 7 Memory Keys B 8 Spot Key B 8 Sti...

Page 17: ...ch key entry system with audible feed back along with a two line 32 character alphanumer ic display provide user friendly control of the system The system provides full range control from the keypad o...

Page 18: ...non glare cover for easy viewing under bright or dark conditions Multi lan guage display capability permits the SP 250 to com municate in English German French Spanish or Japanese Katakana Auto Mode S...

Page 19: ...ty rever sal Work Cable 10 ft 3 0m long with work clamp WIRE FEEDER FEATURES Drop in Wire Loading Wire spindle snaps into Readi Reel Adapter included with SP 250 or most any 2 51mm I D wire spool The...

Page 20: ...nto the gun handle for use with SP 250 remote control features MACHINE CAPABILITY The IDEALARC SP 250 is rated at the following duty cycles based upon 10 minute time period i e for 60 duty cycle it is...

Page 21: ...g on PROCESS KEY being used For function of arrow keys refer to each process or procedure See Table B 1 for summary of arrow key operation 3 PROCESS WIRE GAS KEY Press key to display the Wire Type Wir...

Page 22: ...rogrammed into the SP 250 Wire Type Wire Diameter Welding Gas Solid Steel 025 0 6mm CO2 Solid Steel 025 0 6mm ArCO2 Solid Steel 030 0 8mm CO2 Solid Steel 030 0 8mm ArCO2 Solid Steel 035 0 9mm CO2 Soli...

Page 23: ...ed on Metal Thickness selected ARROW KEY OPERATION WHEN USED WITH AUTO KEY See Table B 1 Left Arrow Keys Press to change the metal thickness displayed Press the UP arrow key to increase metal thicknes...

Page 24: ...r arrow keys Press UP arrow key to increase Stitch time ON from 0 20 seconds to 2 50 seconds Press the DOWN arrow key to decrease Stitch ON time from 2 50 seconds to 0 20 seconds Right arrow keys Pres...

Page 25: ...ed on the screen 4 or 5 Press the SAVE key Press other MEMORY Number key that was displayed after the toggle 5 or 4 When power is returned the machine will not be in the toggle mode However the weld s...

Page 26: ...ue with weld process b If run in mode displayed is not the required mode repeat Step 1 By repeating Step 1 the run in mode changes Pressing the TIMERS OFF key and the PROCESS key allows you to switch...

Page 27: ...s about 3 8 inch 3 4 for Outershield 18 To stop welding release the gun trigger and then pull the gun away from the work after the arc goes out 19 When no more welding is to be done close valve on gas...

Page 28: ...move gun just beyond edge of molten metal during OFF time For smoothest welds on thinner metal point gun slightly towards the direc tion of travel USING THE GUN TRIGGER SWITCH The Gun Trigger Switch...

Page 29: ...ips V brackets so wire dereels from top of coil toward wire drive NOTE The retaining spring side of the adapter should be facing the center inner panel of the SP 250 9 To remove the Readi Reel from Ad...

Page 30: ...s set for the wire type diameter and gas per instructions on name plate SETTING IDLE ROLL PRESSURE The idle roll pressure wing screw is set at the factory backed out 2fi turns from full pressure This...

Page 31: ...e Assemblies C 1 Spool Gun Adapter Kit Installation Spool Gun Module Board Installation C 1 Spool Gun Connection Box Installation C 3 Spool Gun Connection C 4 Spool Gun Installation to Old K531 C 5 TA...

Page 32: ...ocesses The kit includes a spool gun module board a connection box assembly with connecting plug and lead harness es mounting hardware and installation and operation instructions SPOOL GUN ADAPTER KIT...

Page 33: ...cle CAUTION Collect metal filings with a rag to protect against possible metal contamination of the control board or other internal electrical components ____________________________________ 9 Fasten...

Page 34: ...ckwise to engage and level the box then tighten the screws 5 Route the control cable of the connection box up through the opening in the front louver provided for the work lead then up behind the wire...

Page 35: ...K469 spool gun with 4 pin plug use the K518 adapter 2 Insert the Twist Mate plug into the mating recepta cle on the front of the connection box and twist to lock the connection 3 Attach the spool gun...

Page 36: ...e drive unit 8 With the SP 250 connected electrode positive remove the positive electrode lead from the termi nal on the wire drive 9 Position the spool gun electrode lead on the termi nal 10 Place th...

Page 37: ...TENANCE SECTION Section D Safety Precautions D 1 Routine and Periodic Maintenance D 1 Component Locations D 2 TABLE OF CONTENTS MAINTENANCE SECTION Return to Master TOC Return to Master TOC Return to...

Page 38: ...as necessary by blowing with low pres sure compressed air Do not use solvents for cleaning the idle roll because it may wash the lubricant out of the bearing All drive rolls are stamped with the wire...

Page 39: ...TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC D 2 MAINTENANCE D 2 Figure D 1 Component Locations IDEALARC SP 250 2 1 3 4 5 5 4 3 1 2 Co...

Page 40: ...oltage Output E 3 Wire Drive Motor and Feedback E 4 Thermal Protection E 5 SCR Operation E 6 TABLE OF CONTENTS THEORY OF OPERATION SECTION LINE SWITCH MAIN TRANSFORMER RECONNECT FAN MOTORS SCR RECTIFI...

Page 41: ...ary winding that sup plies power to the Control Board for SCR gate drive and gas solenoid operation The weld power windings connect to the Control Board as well as to the main SCR Rectifier Figure E 2...

Page 42: ...ling the output of the machine See SCR Operation The control board also powers and commands the keypad the LCD Display the piezo alarm the gas solenoid and the wire drive motor Figure E 3 Output Recti...

Page 43: ...LY OPERATION CONTINUED LINE SWITCH MAIN TRANSFORMER RECONNECT FAN MOTORS SCR RECTIFIER C A P A C I T O R S SHUNT CHOKE WIRE DRIVE MOTOR TACH POSITIVE TERMINAL NEGATIVE TERMINAL GAS SOLENOID PIEZO ALAR...

Page 44: ...egulates the electrode wire feed speed through the gun Figure E 5 Wire Drive Motor and Feedback POWER SUPPLY OPERATION CONTINUED LINE SWITCH MAIN TRANSFORMER RECONNECT FAN MOTORS SCR RECTIFIER C A P A...

Page 45: ...put choke energizes the cooling fan motors when required The other choke thermostat opens the trig ger circuit preventing machine weld output and wire feed if excessive operating temperatures are dete...

Page 46: ...he AC cycle time in the off state and the remainder of the time in the on state The amount of time spent in the ON state is con trolled by the gate An SCR is fired by a short burst of current into the...

Page 47: ...pad Resistance Test F 25 F 27 Wire Drive Motor and Tach Feedback Test F 28 F 31 Oscilloscope Waveforms F 32 F 36 Replacement Procedures Control Board Remove Replace F 37 F 38 Keypad Remove Replace F 3...

Page 48: ...t com ponent is either good or bad If there are a number of possible components check the components in the order listed to eliminate one possibility at a time until you locate the cause of your probl...

Page 49: ...o not touch electrically hot parts Remove the P C Board from the static shielding bag and place it directly into the equipment Don t set the P C Board on or near paper plastic or cloth which could hav...

Page 50: ...gun trigger is pulled Display lights properly 1 Contact The Lincoln Electric Service Dept 216 383 2531 or 1 800 833 9353 WELD 1 Check input power switch S1 It may be faulty 2 Check for loose or broken...

Page 51: ...pacitors Also check for leaky capacitors Replace if necessary WARN ING The liquid electrolyte in these capacitors is toxic Avoid contact with any portion of your body 3 Perform the SCR Rectifier Assem...

Page 52: ...Wiring Diagram 2 The Keypad may be faulty Perform the Keypad Test 3 The control board may be faulty Replace 1 Perform the Keypad Test 2 Perform the Main Transformer Test 3 The control board may be fau...

Page 53: ...essed then the control board may be defective Replace 1 Perform the Keypad Test 2 The control board may be faulty Replace 3 The LCD Display may be faulty Replace 1 Check the gas solenoid by dis connec...

Page 54: ...iring Diagram 2 If the 12VDC is not present at pins 1J1 to 2J1 then perform the Main Transformer Test 3 The control board may be faulty Replace 1 Check the motor armature cur rent Normal armature curr...

Page 55: ...Motor and Tach Feedback test 2 The control board may be faulty Replace 1 Perform the Wire Drive Motor and Tach Feedback Test 2 The control board may be faulty Replace 1 The thumb switch circuit in the...

Page 56: ...ct with any portion of your body 4 The control board may be faulty Replace 1 The output capacitor bank may be faulty Check for loose con nections at the capacitors Also check for leaky capacitors Repl...

Page 57: ...S RECOMMENDED COURSE OF ACTION The contact tip seizes in the gas dif fuser 1 The tip is being over heated due to excessive high current and or high duty cycle welding 2 A light application of high tem...

Page 58: ...by using the manual mode Unit is only programmed for 045 1 1mm diameter in Outershield elec trode wire Other wire diameters within the SP 250 rating can be accom modated by using the Manual mode Inner...

Page 59: ...d due to excessive electrical interference All of these error types turn off the arc voltage wire feed speed and sole noid Press the Process key per second message and check all settings before contin...

Page 60: ...se or decrease in that setting Indicates to operator that too much current is being drawn from the machine and the output has been reduced to prevent the current from exceeding safe levels This will t...

Page 61: ...IN TRANSFORMER TEST Service and repair should be performed only by Lincoln Electric factory trained per sonnel Unauthorized repairs performed on this equipment could result in danger to the technician...

Page 62: ...portionably with the primary input volt age 1 Disconnect the main input power supply to the machine 2 Remove the Case Top and Side Panels with a 5 16 nut driver 3 Locate Plug J3 and Plug J6 on the G22...

Page 63: ...following voltage tests at Plug J3 MAIN TRANSFORMER TEST FIGURE F 1B G1992 Code 9402 Only Control PC Board Main Transformer Test Points Note Plugs J5 and J6 are on inboard non component side of Contr...

Page 64: ...rect nameplate input volt age between the H1 lead at the ON OFF POWER SWITCH to H2 or H3 at the reconnect panel Voltage tested will vary depending on Input Voltage Connection See wiring dia gram for t...

Page 65: ...to Master TOC Return to Master TOC Return to Master TOC F 18 TROUBLESHOOTING REPAIR F 18 IDEALARC SP 250 MAIN TRANSFORMER TEST b If the correct nameplate voltage is being applied to the main transfor...

Page 66: ...5 16 Nut Driver fi open end or socket wrench STATIC SCR RECTIFIER ASSEMBLY TEST Service and repair should be performed only by Lincoln Electric factory trained per sonnel Unauthorized repairs performe...

Page 67: ...See Figures F 2A and F 2B FIGURE F 2A Remove Plugs J3 and J6 to Perform Static SCR Rectifier Assembly Test 3 Test with an Analog Volt Ohm meter that capacitors have completely dis charged 4 Disconnec...

Page 68: ...g ohmmeter Multimeter FIGURE F 4 SCR 1 Test Points 7 Test for high or infinite resistance from the cathode to the anode of SCR 1 by reversing the meter leads See Figure F 4 a If a high or infinite res...

Page 69: ...at Sink Assembly Drawings ACTIVE SCR RECTIFIER ASSEMBLY TEST Service and repair should be performed only by Lincoln Electric factory trained per sonnel Unauthorized repairs performed on this equipment...

Page 70: ...leads X2 and X3 from the negative capacitor bank buss bar Be sure there is no electrical con tact See Figure F6 NOTE DO NOT DISASSEMBLE THE SCR RECTIFIER HEAT SINK ASSEM BLY 6 Construct the circuit s...

Page 71: ...closed the SCR is defective NOTE Be sure battery is functioning properly A low battery can affect the results of the test Repeat Battery Test Procedure in Step 6 if needed 12 Open switch SW 1 13 Recon...

Page 72: ...be performed only by Lincoln Electric factory trained per sonnel Unauthorized repairs performed on this equipment could result in danger to the technician or the machine operator and will invalidate y...

Page 73: ...esistance of each key at Plug J2 using an analog volt ohm meter as described in Table F 1 a The resistance measurements are taken from the pin locations on Plug J2 See Figure F 9 for each pin location...

Page 74: ...2 MEMORY 4 100 OHMS 30 TYPICAL 2J2 3J2 MEMORY 2 100 OHMS 30 TYPICAL 2J2 5J2 MEMORY 1 100 OHMS 30 TYPICAL 3J2 6J2 LEFT UP ARROW 100 OHMS 30 TYPICAL 3J2 8J2 LEFT DOWN ARROW 100 OHMS 30 TYPICAL 3J2 4J2 S...

Page 75: ...rvice and repair should be performed only by Lincoln Electric factory trained per sonnel Unauthorized repairs performed on this equipment could result in danger to the technician or the machine operat...

Page 76: ...J5 on the G2252 Control Board or Plug J6 on the G1992 Control Board Code 9402 only See Figures F 10A and F 10B FIGURE F 10A Plug J5 Location on G2252 PC Control Board WIRE DRIVE MOTOR AND TACHOMETER...

Page 77: ...armature is zero check the wires between Plug J5 J6 on Code 9402 and the wire drive motor b If the wires are okay and voltage to the drive motor armature is zero the Control Board may be faulty Repla...

Page 78: ...tive and lead 206B negative See Figure F 10 for pin locations a Insert probes into Molex pin cavities 2 Pull gun trigger 3 Read meter for 1 5 3 5 VDC a If the 1 5 3 5 VDC is present the tach circuit i...

Page 79: ...on represents 2 milliseconds in time Note Scope probes connected at machine output terminals probe to electrode probe to work Volts Div 20 V Div Horizontal Sweep 2 ms Div Coupling DC Trigger Internal...

Page 80: ...was loaded with a resistance grid bank Note Scope probes connected at machine output terminals probe to electrode probe to work Volts Div 20 V Div Horizontal Sweep 5 ms Div Coupling DC Trigger Interna...

Page 81: ...liseconds in time The machine was loaded with a resistance grid bank Note Scope probes connected at machine output terminals probe to electrode probe to work Volts Div 20 V Div Horizontal Sweep 5 ms...

Page 82: ...nd each horizontal division represents 5 milliseconds in time Note Scope probes connected at machine output terminals probe to electrode probe to work Volts Div 20 V Div Horizontal Sweep 5 ms Div Coup...

Page 83: ...al division represents 5 milliseconds in time Note Scope probes connected at Plug J3 on the control board The probe to lead G2 and the probe to lead 204 Volts Div 2 V Div Horizontal Sweep 5 ms Div Cou...

Page 84: ...ng Strap 1 Disconnect main input power the machine 2 Remove the Case Top and Side Panels using 5 16 nut driver 3 Disconnect all wiring harness plugs and Molex Plugs connect ed to the Control Board See...

Page 85: ...may vary with different Code Machines 5 Lift the Control Board straight up and out from the machine 6 Replace all mounting screws and wiring connections when installing the Control Board CONTROL PC BO...

Page 86: ...ry trained per sonnel Unauthorized repairs performed on this equipment could result in danger to the technician or the machine operator and will invalidate your factory warranty For your safety and to...

Page 87: ...right hand corner of the Keyboard and peel it off the front panel a The back of the Keypad is an adhesive material that bonds the Keypad to the Front Panel 6 Install a new Keypad a Remove the paper ba...

Page 88: ...y by Lincoln Electric factory trained per sonnel Unauthorized repairs performed on this equipment could result in danger to the technician or the machine operator and will invalidate your factory warr...

Page 89: ...al 4 Using a small slot head screw driver loosen the set screw holding the out going guide tube into the drive roll assembly Carefully slide out the wire drive assembly 5 Disconnect the six pin plug f...

Page 90: ...r should be performed only by Lincoln Electric factory trained per sonnel Unauthorized repairs performed on this equipment could result in danger to the technician or the machine operator and will inv...

Page 91: ...ing dia gram using wire cutters a The easiest access to these leads is from the right side of the machine b Cut any necessary cable ties 5 Remove the four screws holding the SCR Assembly to the floor...

Page 92: ...APACITOR BANK REMOVAL AND REPLACEMENT Service and repair should be performed only by Lincoln Electric factory trained per sonnel Unauthorized repairs performed on this equipment could result in danger...

Page 93: ...he negative capac itor bank buss bar using a slot head screwdriver and 3 8 open end wrench 6 Remove the 204 lead from the pos itive buss bar 7 Remove the shunt from the negative capacitor bank buss ba...

Page 94: ...ld be performed only by Lincoln Electric factory trained per sonnel Unauthorized repairs performed on this equipment could result in danger to the technician or the machine operator and will invalidat...

Page 95: ...alternative to cutting these leads is to remove them from Molex Plug J3 and pull them free of any wire bundles 10 Remove all cable ties wire mounts and any harness tape that could get in the way durin...

Page 96: ...nly by Lincoln Electric factory trained per sonnel Unauthorized repairs performed on this equipment could result in danger to the technician or the machine operator and will invalidate your factory wa...

Page 97: ...ove the screws holding the Case Back to the floor of the machine using a 1 2 socket wrench with extension 5 Loosen the two screws holding the reconnect panel in place and a slide the reconnect panel f...

Page 98: ...rew driver b When the motor is free from the mounting bracket place it care fully on the bottom of the machine c Cut any necessary wire wraps bundling the motor leads d Remove the leads from the fan m...

Page 99: ...to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC INPUT IDLE AMPS AND WATTS WIRE SPEED RANGE OPEN CIRCUIT VOLTAGE RETEST AFTER REPAIR Maximum Idle Wat...

Page 100: ...PC BOARD LAYOUT G 1 G2252 CONTROL PC BOARD LAYOUT G 5 WIRING DIAGRAM Code 9402 G 9 WIRING DIAGRAM Code 9546 10002 G 10 WIRING DIAGRAM Code 9723 10001 G 11 G1992 CONTROL PC BOARD SCHEMATIC G 12 G2252...

Page 101: ...48 D47 C26 D70 D71 C27 R57 D49 D50 D38 C47 R52 D46 C24 D53 D54 C28 R16 C6 C8 C7 D32 D34 C17 D57 R70 R6 C10 C5 C4 D69 R1 R5 D45 D20 C32 C33 C34 C36 C37 C52 R3 C35 J8 SP 250 CONTROL R123 C77 C78 Y1 C81...

Page 102: ...13 R114 R115 R120 R37 R122 RESISTOR MF 1 2W 750 2 R52 R57 RESISTOR MF 1 2W 1 8K 2 R118 RESISTOR MF 1 2W 68 2 R89 R90 RESISTOR MF 1 2W 270 2 R31 RESISTOR MF 1 2W 1 5K 2 R62 RESISTOR MF 1 2W 10K 2 R1 RE...

Page 103: ...OS MCU NO ROM DIP 68HC11A1P X9 IC CMOS UNDERVOLT SENSING RESET MCU X12 IC CMOS SWITCH ANALOG QUAD 4066 X1 IC OP AMP QUAD GEN PURPOSE 224N Y1 CRYSTAL QUARTZ 4 000MHZ X3 IC CMOS GATE NAND 2 INPUT QUAD H...

Page 104: ...4 NOTES G 4 IDEALARC SP 250 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC...

Page 105: ...sponsibility for liablilities resulting from board level troubleshoot ing PC Board repairs will invalidate your factory warranty Individual Printed Circuit Board Components are not available from Linc...

Page 106: ...ER C81 CAPACITOR ALEL 50 25V 75 10 X10 IC CMOS INVERTER SCHMITT HEX 4584 X16 VOLTAGE REGULATOR R48 TRIMMER MT 1 2W 10K 10 LINEAR C30 C31 CAPACITOR CEMO 22P 100V 5 C10 C11 C12 CAPACITOR CEMO 100P 100V...

Page 107: ...71 R81 R90 R91 RESISTOR MF 1 4W 4 75K 1 R136 R190 R116 RESISTOR MF 1 4W 47 5K 1 R125 R127 RESISTOR MF 1 4W 511 1 R126 R131 RESISTOR MF 1 4W 51 1K 1 R167 R168 R173 R174 RESISTOR MF 1 4W 562 1 R10 R68 R...

Page 108: ...8 NOTES G 8 IDEALARC SP 250 Return to Section TOC Return to Section TOC Return to Section TOC Return to Section TOC Return to Master TOC Return to Master TOC Return to Master TOC Return to Master TOC...

Page 109: ...IMMEDIATE AND FUTURE APPLICATIONS N B THIS DIAGRAM SHOWS THE ELECTRODE POLARITY N C CONNECTOR SHOWN GEARBOX SIDE VIEW N D CONNECTORS MOUNTED ON NON COMPONENT SIDE OF BOARD COMPONENT SIDE OF P C BOARD...

Page 110: ...ATRIX SHOWN FRONT VIEW R RED U BLUE 2 5K 10W G X3 X4 X5 X6 X7 N H RESISTOR R2 MOUNTED ON FAN SENSOR BRACKET N J CONNECTOR SHOWN PIN SIDE VIEW N H N G 15 OHMS 100 W R1 PROCESS WIRE GAS AUTO MEMORY 1 TI...

Page 111: ...LOSEST TO POWER TRANSFORMER N F KEYPAD MATRIX SHOWN FRONT VIEW R RED U BLUE 2 5K 10W G B W X3 X4 X5 X6 X7 N G THERMOSTAT S4 MOUNTED ON FAN SENSOR BRACKET N H RESISTOR R2 MOUNTED ON FAN SENSOR BRACKET...

Page 112: ...35 36 40 2 42 38 14 24 47 21 33 28 11 12 18 6 26 5 16 1 31 10 32 34 BUZZER J7 2 15 V P7 5 V 5 V PIEZO P7 PIEZO BUZZER CIRCUITRY 1 2W 27K R121 J7 1 B A B 15 V X11 2 4 5 5 6K R25 X11 1 7 6 3 3K R117 1 2...

Page 113: ...2 67K R114 15 0K R115 D54 100 R94 C41 X19 4 2 5 100V 22 C42 X11 13 10 11 40V 600mA Q22 40V 600mA Q23 10K R93 1 00K R7 74HC245 B4 OUT EN DIR B8 A7 B6 B5 A4 A3 A2 A1 A6 B7 A5 B2 B1 B3 A8 X21 19 1 9 2 7...

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Lincoln Electric IDEALARC SP-250, Service Manual

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