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F-50 TROUBLESHOOTING & REPAIRF-50
CONTROL BOARD REMOVAL AND REPLACEMENT (continued)
Figure F.12 - Case Front Screw Location
CASEFRONT SCREWS
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| ELECTRIC 7 |
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| MPANY | CLEVELAND, |
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| OHIO |
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| USA |
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Section TOC Master TOC
REMOVAL PROCEDURE
1. Remove input power to the TIG 275 machine.
2. Using a 3/8” nut driver, remove the two screws from the top of the case front. See Figure F.12.
3. The top front control box cover can now be tilted forward to gain access to the control board and its plugs.
4. From left to right, label and disconnect plugs J4, J5, J6, J8, J9, J10, J11, J12. See Figure
F.13.
5. Cut any necessary cable ties.
6. Using a phillips head screwdriver, remove the eight P.C. Board mounting screws. See
Figure F.13.
7. Carefully maneuver the control board out of the front of the machine.
REPLACEMENT PROCEDURE 1. Replace the control board.
2. Mount the new control board in its proper position using the eight phillips head mount- ing screws.
3. Replace any necessary cable ties.
4. Reconnect plugs previously removed from the control board.
5. Secure the control box assembly using the two 3/8” mounting screws previously removed.