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F-63TROUBLESHOOTING AND REPAIRF-63

DC BUS BOARD REMOVAL AND REPLACEMENT (continued)

FIGURE F.28 CASE FRONT SCREW REMOVAL

STATUSTHERMAL

Phillips Head

 

Phillips Head

 

Screws

Screws

_

+

 

 

 

 

 

5/16"

 

 

Mounting Screws

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9.Label and remove two thermostat leads and four leads from the bus rectifier.

10.Using a 3/8” open end wrench, remove the three DC Bus Board mounting nuts. See Figure F.29.

11.Replace the DC Bus Board.

12.Secure the new DC Bus Board in its proper loca- tion using the 3/8” mounting nuts.

13.Reconnect previously removed leads to their prop- er locations.

14.Replace the four phillips head screws mounting the two welder output terminals to the front of the machine.

15.Replace the two phillips head screws from above and below the input power switch.

FIGURE F.29 CASE FRONT SCREW REMOVAL

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3/8" Mounting

Nuts

J47

Bus

Rectifier

L11078-1

Thermostat

J46

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POWER WAVE 355M/405M

Page 109
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Lincoln Electric 355M, 405M service manual J46, 63TROUBLESHOOTING and REPAIRF-63