Lincoln Electric SVM156-A service manual Rectifier Assembly Removal Procedure

Models: SVM156-A

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F-71

F-71

 

 

TROUBLESHOOTING & REPAIR

OUTPUT RECTIFIER, STT CHOPPER BOARD AND RECTIFIER MODULE

REMOVAL AND REPLACEMENT (CONTINUED)

FIGURE F.27 – OUTPUT RECTIFIER, STT CHOPPER BOARD AND RECTIFIER MODULE

REMOVAL AND REPLACEMENT

 

RECTIFIER

 

THERMOSTAT

LEAD 287

(LEADS 291 & 292)

 

(SNUBBER

LEAD 289B

DIODE)

(STT SNUBBER

PLUG J10

CAPACITOR)

TRANSFORMER

 

STT LEAD

LEADS

 

 

RECTIFIER

 

MODULE

 

HEATSINK

POSITIVE

MOUNT

BOLTS (4X)

OUTPUT

 

LEAD

 

HEATSINK

 

RECTIFIER ASSEMBLY

REMOVAL PROCEDURE

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1.Remove input power to the Power Wave 455/R.

2.Using the 3/8” nut driver, remove the case top and sides.

3.Perform the Capacitor Discharge proce- dure.

4.Using the 9/16” wrench, remove the Power Wave positive output lead from the rectifier heat sink. Note fastener hardware for reassembly. Refer to Figure F.27.

5.Using the 7/16” wrench, remove the STT output lead from the rectifier heat sink. Note fastener hardware for reassembly. Refer to Figure F.27.

6.Using the 7/16” wrench, remove the eight transformer leads from the rectifier modules. Label the leads and take note of lead place- ment for reassembly. Note that each screw has two flat washers and one lock washer.

POWER WAVE 455/R

Page 117
Image 117
Lincoln Electric SVM156-A service manual Rectifier Assembly Removal Procedure