Lincoln Electric SVM153-A Power Module PC Board Removal, Figure F.30 Power Module PC Board

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

F-67	F-67
	TROUBLESHOOTING & REPAIR

POWER MODULE (CHOPPER) PC BOARD/DIODE

MODULE REMOVAL AND REPLACEMENT (CONTINUED)

FIGURE F.30 – POWER MODULE PC BOARD

TEMPERATURE

SWITCH

HEAT SINK

COPPER

SPACERS

DIODE MODULE

ALLEN HEAD

SCREWS (4)

POWER

MODULE

PC BOARD

PLUG J50

Return to Section TOC

Return to Section TOC

Return to Master TOC

Return to Master TOC

POWER MODULE PC BOARD REMOVAL

Refer to Figure F.30.

1.Turn the engine off.

2.Remove the front right or left case side, depending on which Power Module PC board you are removing.

3.Perform the Output Panel Removal proce- dure section of the Case Cover Removal procedure.

4.Perform the Power Module Capacitor Discharge procedure.

5.With the phillips screw driver, remove plug and lead assembly for P/J 50 (right side) or P/J51 (left side). Cut any necessary cable ties.

6.With the 7/16" wrench, remove the nuts, lock washers, and flat washers holding the two heavy leads and the small diode leads

to the Power Module PC board. (Right side: W7, W8, and D3. Left side: W9, W10 and D4.) See the Wiring Diagram.

7.With the 7/16" wrench, remove the nuts, lock washers, and flat washers holding the posi- tive capacitor straps to the Power Module PC board. Loosen the nuts at the capacitor terminals and swing the straps out of the way.

8.With the 3/8" allen wrench, remove the top and bottom cap screws from the Power Module PC board.

NOTE: Each top cap screw has a copper stand- off on the opposite side of the board. Be sure to place this standoff between the heat sink and the PC board at reassembly.

9. Remove the power module board.

COMMANDER 500