Lincoln Na5 Service Manual
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![Page 117
F-64TROUBLESHOOTING & REPAIRF-64
NA-5
METER CIRCUIT ACCURACY TEST
TEST DESCRIPTION
This test will help determine if the NA-5 meter circuit is functioning p\
roperly.
MATERIALS NEEDED
Digital volt/ohmmeter with at least 3-1/2 digits and +/- 0.5% accuracy
5/16 Nutdriver
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 or the machine operator and will invalidate your factory...](http://img.usermanuals.tech/thumb/2946/103900/w64_na5-service-manual-1515506101_d-116.png "Page 117
F-64TROUBLESHOOTING & REPAIRF-64
NA-5
METER CIRCUIT ACCURACY TEST
TEST DESCRIPTION
This test will help determine if the NA-5 meter circuit is functioning p\
roperly.
MATERIALS NEEDED
Digital volt/ohmmeter with at least 3-1/2 digits and +/- 0.5% accuracy
5/16 Nutdriver
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 or the machine operator and will invalidate your factory...")
![Page 124
F-71TROUBLESHOOTING & REPAIRF-71
NA-5
PC BOARD(S) REMOVAL AND REPLACEMENT
DESCRIPTION
The following procedure will aid the technician in removing and replacin\
g the printed circuit
boards for maintenance or replacement.
MATERIALS NEEDED
Phillips head screwdriver
5/16 Nutdriver
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 or the machine operator and will invalidate...](http://img.usermanuals.tech/thumb/2946/103900/w64_na5-service-manual-1515506101_d-123.png "Page 124
F-71TROUBLESHOOTING & REPAIRF-71
NA-5
PC BOARD(S) REMOVAL AND REPLACEMENT
DESCRIPTION
The following procedure will aid the technician in removing and replacin\
g the printed circuit
boards for maintenance or replacement.
MATERIALS NEEDED
Phillips head screwdriver
5/16 Nutdriver
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 or the machine operator and will invalidate...")
![Page 126
F-73TROUBLESHOOTING & REPAIRF-73
NA-5
DIGITAL METER AND METER PC BOARD REMOVAL AND REPLACEMENTDESCRIPTION
The following procedure will help the technician remove the digital mete\
rs and meter PC
boards for repair or replacement.
MATERIALS NEEDED
5/16 Nutdriver
Phillips head screwdriver
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 or the machine operator and will...](http://img.usermanuals.tech/thumb/2946/103900/w64_na5-service-manual-1515506101_d-125.png "Page 126
F-73TROUBLESHOOTING & REPAIRF-73
NA-5
DIGITAL METER AND METER PC BOARD REMOVAL AND REPLACEMENTDESCRIPTION
The following procedure will help the technician remove the digital mete\
rs and meter PC
boards for repair or replacement.
MATERIALS NEEDED
5/16 Nutdriver
Phillips head screwdriver
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 or the machine operator and will...")
F-68TROUBLESHOOTING & REPAIRF-68 9. Locate the speedmeter PC board.See Figure F.10 10. Apply input power to the NA-5. 11. Test for AC supply to the speed- meter PC board. • Check for 8 to 11VAC from lead #601 ot #602. See Figure F.10 Note: The coating will have to be removed from the test points to ensure accurate voltmeter readings. If the cor- rect AC voltage is not present check for loose or faulty connects with the associ- ated leads. See wiring diagram. 12. Test for DC volts on the speed- meter PC board. • Check for 4.75 to 5.25VDC from TP5 to lead #510P. See Figure F.10 Note: The coating will have to be removed from the test points to ensure accurate meter readings. • If the display is NOT lit and thecorrect DC voltage is present at TP5 to lead #510P, the digital meter may be faulty. Replace the meter. • If the AC voltage IS present at leads #601 to #602 and the DC voltage is missing, the speedme- ter PC board may be faulty. METER CIRCUIT ACCURACY TEST (Continued) NA-5 FIGURE F.10 SPEEDMETER PC BOARD AND TEST POINTS NA5 SPEED METER L6233 TP4 TP5 510 510P 601 602 Return to Section TOC Return to Section TOC Return to Section TOCReturn to Section TOCReturn to Master TOCReturn to Master TOC Return to Master TOCReturn to Master TOC
F-69TROUBLESHOOTING & REPAIRF-69 13. Test Speedmeter Digital Meter Accuracy • Use a test meter with at least 3- 1/2 digits and +/- 0.5% accuracy. • Connect the + probe to TP4 and the - probe to lead 510P. Do NOT disconnect plug. Note: The coating will have to be removed from the test points to ensure accurate meter readings. • With the NA-5 speedmeter read-ing SET values of STRIKE speed, adjust the strike wire speed con- trol until the test meter matches the settings in the table below. • If the NA-5 digital speedmeter does not match the readings, the digital meter may befaulty. METER CIRCUIT ACCURACY TEST (Continued) NA-5 *For Hi-Speed NA-5 speedmeter (IPM X 1000). NA-5 SET SPEED READING TEST VOLTMETER READING (IPM) 150 (1.50*) .150 +/- .004VDC 300 (3.00*) .300 +/- .004VDC Return to Section TOC Return to Section TOC Return to Section TOCReturn to Section TOCReturn to Master TOCReturn to Master TOC Return to Master TOCReturn to Master TOC
F-70TROUBLESHOOTING & REPAIRF-70 14. Test Speedmeter PC Board Accuracy • Use a test meter with at least 3- 1/2 digits and +/- 0.5% accuracy. • Connect the + probe to lead #519 (Jumper lead) and the - probe to lead #510P. Do not discon- nect plug. Note: The coating will have to be removed from the test points to ensure accurate meter readings. • With the NA-5 speedmeter read-ing SET values of STRIKE speed , adjust the strike wire speed con- trol until the NA-5 speedmeter matches the settings in the table below. • If the test meter does not match the readings, the speedmeter PC board may be faulty. 15. When the testing is complete close and secure the access door. METER CIRCUIT ACCURACY TEST (Continued) NA-5 SPEEDMETER NA-5 SET SPEED READING TEST VOLTMETER CALIBRATION PIN (IPM)READING 21* 2.07*6.00 +/- .06 57F 7786.00 +/- .06 57 7626.00 +/- .06 95 4286.00 +/- .06 95S 4566.00 +/- .06 142 2896.00 +/- .06 142T 3006.00 +/- .06 * For Hi-Speed NA-5 speedmeter (IPM X 1000) Return to Section TOC Return to Section TOC Return to Section TOCReturn to Section TOCReturn to Master TOCReturn to Master TOC Return to Master TOCReturn to Master TOC
F-71TROUBLESHOOTING & REPAIRF-71 NA-5 PC BOARD(S) REMOVAL AND REPLACEMENT DESCRIPTION The following procedure will aid the technician in removing and replacin\ g the printed circuit boards for maintenance or replacement. MATERIALS NEEDED Phillips head screwdriver 5/16 Nutdriver 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 or the machine operator and will invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety notes and precau- tions detailed throughout this manual. If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric service department for technical troubleshooting assistance before you proceed. Call (216) 383-2531 or (800) 833-9353 (WELD). _____________________________________________________________ WARNING This procedure takes approximately 17 minutes to perform. Return to Section TOC Return to Section TOC Return to Section TOCReturn to Section TOCReturn to Master TOCReturn to Master TOC Return to Master TOCReturn to Master TOC
F-72TROUBLESHOOTING & REPAIRF-72 PROCEDURE Before starting the following procedure, refer to the PC Board Troubleshooting Procedures at the beginning of this section. 1. Remove the input power to the NA- 5. 2. Using the 5/16 nutdriver open the control box PC board cover. 3. Carefully remove the molex type plugs (and leads) connected to the PC board that is to be removed. 4. Using the phillips head screwdriver, remove the PC board mounting screws. 5. Carefully remove the PC board. REPLACEMENT PROCEDURE 1. Using the phillips head screwdriver and mounting screws carefully posi- tion and install the new PC board. 2. Reconnect the molex type plugs (and leads) into the new PC board. 3. Close and secure the access door. PC BOARD(S) REMOVAL AND REPLACEMENT (Continued) NA-5Return to Section TOC Return to Section TOC Return to Section TOCReturn to Section TOCReturn to Master TOCReturn to Master TOC Return to Master TOCReturn to Master TOC
F-73TROUBLESHOOTING & REPAIRF-73 NA-5 DIGITAL METER AND METER PC BOARD REMOVAL AND REPLACEMENTDESCRIPTION The following procedure will help the technician remove the digital mete\ rs and meter PC boards for repair or replacement. MATERIALS NEEDED 5/16 Nutdriver Phillips head screwdriver 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 or the machine operator and will invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety notes and precau- tions detailed throughout this manual. If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric service department for technical troubleshooting assistance before you proceed. Call (216) 383-2531 or (800) 833-9353 (WELD). _____________________________________________________________ WARNING This meter PC Board portion of this procedure takes approximately 8 minu\ tes to perform. The total Meter PC Board and Meter Replacement procedure takes approxima\ tely 15 minutes to perform. Return to Section TOC Return to Section TOC Return to Section TOCReturn to Section TOCReturn to Master TOCReturn to Master TOC Return to Master TOCReturn to Master TOC
F-74TROUBLESHOOTING & REPAIRF-74 METER PC BOARD REMOVAL PROCEDURE 1. Remove input power to the NA-5. 2. Using the 5/16 nutdriver open thecontrol box PC board access door. 3. Locate and unplug the meter PC board that is to be removed. See Figure F.11 4. Using the 5/16 nutdriver remove the four PC board mounting nuts. See Figure F.11 5. Carefully remove the meter PC board. Note insulation placement for reassem- bly. Also make sure the plug on the back of the PC board plugs into the prongs on the meter when you reassemble. DIGITAL METER AND METER PC BOARD REMOVAL AND REPLACEMENT NA-5 FIGURE F.11 METER PC BOARD, MOUNTING NUTS AND PLUG MOUNTING NUTS PC BOARD PLUG PRONGS SPEED METER BOARD METER BOARD Return to Section TOC Return to Section TOC Return to Section TOCReturn to Section TOCReturn to Master TOCReturn to Master TOC Return to Master TOCReturn to Master TOC
F-75TROUBLESHOOTING & REPAIRF-75 DIGITAL METER REMOVAL PROCEDURE 1. Using the phillips head screwdriverremove the four screws from the meter bezel. See Figure F.12 2. Carefully remove the bezel assem- bly. 3. Carefully remove the meter shield assembly. 4. Using the 5/16 nutdriver, remove the two nuts, screws and lockwash- ers holding the digital meter to the cover assembly. 5. Carefully remove the digital meter. DIGITAL METER AND METER PC BOARD REMOVAL AND REPLACEMENT NA-5 FIGURE F.12 METER BEZEL AND SCREW LOCATIONS METER BEZEL METER SHIELD DIGITAL METER MOUNTING INSULATOR METER SHIELD ASSEMBLY Return to Section TOC Return to Section TOC Return to Section TOCReturn to Section TOCReturn to Master TOCReturn to Master TOC Return to Master TOCReturn to Master TOC
F-76TROUBLESHOOTING & REPAIRF-76 REPLACEMENT PROCEDURE 1. With the 5/16 nutdriver, fasten thedigital meter to the cover assembly with two screws, nuts and lockwash- ers. 2. Using the phillips head screwdriver, reattach the meter shield and bezel assembly. 3. Position the insulation and plug the PC meter board into the digital meter. 4. Mount the meter PC board using the four nuts previously removed. 5. Reattach the molex plug. 6. Close and secure the access door. DIGITAL METER AND METER PC BOARD REMOVAL AND REPLACEMENT NA-5Return to Section TOC Return to Section TOC Return to Section TOCReturn to Section TOCReturn to Master TOCReturn to Master TOC Return to Master TOCReturn to Master TOC
F-77TROUBLESHOOTING & REPAIRF-77 NA-5 TACH PC BOARD REMOVAL AND REPLACEMENT DESCRIPTION The following procedure will help the technician remove the Tach PC boar\ d and related com- ponents for repair or replacement. MATERIALS NEEDED 5/16 Nutdriver Slot head screwdriver Phillips head screwdriver 3/8 Wrench 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 or the machine operator and will invalidate your factory warranty. For your safety and to avoid electrical shock, please observe all safety notes and precau- tions detailed throughout this manual. If for any reason you do not understand the test procedures or are unable to perform the tests/repairs safely, contact the Lincoln Electric service department for technical troubleshooting assistance before you proceed. Call (216) 383-2531 or (800) 833-9353 (WELD). _____________________________________________________________ WARNING This procedure takes approximately 9 minutes to perform. Return to Section TOC Return to Section TOC Return to Section TOCReturn to Section TOCReturn to Master TOCReturn to Master TOC Return to Master TOCReturn to Master TOC