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TROUBLESHOOTING & REPAIR
DC BUS BOARD REMOVAL AND REPLACEMENT (Continued)
FIGURE F.28 CASE FRONT SCREW REMOVAL
STATUS | THERMAL |
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.
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FIGURE F.29 CASE FRONT SCREW REMOVAL
J47
Bus
Rectifier
3/8" Mounting | ||
Nuts | ||
Thermostat |
