TROUBLESHOOTING & REPAIR
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| CONTROL PC BOARD REMOVAL AND REPLACEMENT (continued) |
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| FIGURE F.22 - CONTROL PC BOARD |
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Return | Return | J8 | J9 | J10 | J11 | J12 | J13 | J14 |
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Return to Section TOC | Return to Master TOC |
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| SQUARE WAVE 355 CONTROL |
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TOC | TOC | TEST PROCEDURE |
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| CAUTION |
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Section | Master | Before starting the following procedure, refer |
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| to | the topic "PC Board Troubleshooting | Be sure to follow the recommended | ||||
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| Procedures" at the beginning of this section. | ||||||
to | to | methods for handling printed circuit boards. | ||||||
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| Failure to do so can result in permanent dam- | ||||||
Return | Return | 1. | Remove input power to the machine. | |||||
2. With the 5/16" nut driver, remove the sheet | age to the equipment. | |||||||
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| metal screws that hold the front control |
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| panel in place. Carefully lower the panel. | 6. Replace the old control PC board. Mount | ||||
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| 3. Carefully remove the molex type plugs con- |
| the board with the mounting screws and | ||||
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| nected to the control PC board. See Figure |
| phillips head screw driver. | |||
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| F.22. | 7. Carefully install the molex plugs that con- | ||||
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| 4. | With the phillips head screw driver, remove |
| nect to the control PC board. | |||
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| the mounting screws from the control PC | 8. Replace the front control panel and tighten | ||||
| board. | |||||||
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| the sheet metal screws with the 5/16" nut | ||||||
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SectiontoReturn | MastertoReturn | 5. | Carefully remove the control PC board. Be |
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| sure to observe static electricity cautions. |
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| SQUARE WAVE TIG 355 | |||||
