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| TROUBLESHOOTING & REPAIR | |||||||||
| REMOTE RECEPTACLE RESISTANCE TEST (continued) |
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| FIGURE F.18 |
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| AMPHENOL 1 |
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| EF | D | CL | BK | A | J |
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TEST PROCEDURE | MG | NH |
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1. Turn the machine off. |
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| 7. | If the resistance values are found to be too | ||||||
2. Perform | the | Case Cover Removal | |||||||||
| Proced . |
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| low, due to contaminated electrical compo- | ||||
3. Make sure that there are no devices of any |
| nents in the Amphenol harness assembly. | |||||||||
| Try removing the contamination and drying | ||||||||||
| kind plugged into either Amphenol recepta- |
| the components completely. If the resistance | ||||||||
| cles. |
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| values are still too low, replace the Amphenol | |||
4. Remove Molex plug P1 from the control PC |
| harness assembly. |
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| board, see Control | 8. | If the values are incorrect for the last two | ||||||||
| Diagram. | Examine the Molex plug and the | |||||||||
| receptacle on the control PC board for dirt, |
| tests in the table, (Pin C to Pin D) check the | ||||||||
| corrosion, damaged or |
| welding terminal switch and the wiring con- | ||||||||
| Repair or replace any damaged components. |
| nected to that switch. See the wiring dia- | ||||||||
| Position the P1 plug so it can not make elec- |
| gram. | Repair any faulty connections | or | ||||||
| trical contact with any other conductor or | 9. | replace the switch if necessary. |
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| chassis ground. |
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| Plug P1 back into the Control Pc board. |
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5. Perform the following resistance tests shown | 10. | Perform the Case Cover Replacement | |||||||||
| in the following table. Be very careful not to |
| Procedure. |
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| damage or spread any of the connection pins |
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6. | in the Amphenol receptacle. | See Table F.4. |
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If the measured resistance | does | not meet |
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| values specified, check for damage, dirt or |
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| moisture contamination in the Amphenol |
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| receptacles and the P1 Molex plug. Check |
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| for damaged or grounded wiring. |
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