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TROUBLESHOOTING & REPAIR |
OVERCURRENT PROTECTION CURRENT TRIGGER TEST (cont.)
FIGURE F.14 - CONTROL BOARD TEST POINTS
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| 2J3 (White) |
J5 | G2527 | CONTROL | J1 | J2 | J4 | J3 |
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6. Turn main power OFF. |
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| 1J3 (Black) |
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7. Perform Input Filter Capacitor Discharge | NOTE: On earlier codes the terminals on the shunt | |||||
Procedure detailed in this section. |
| leads were crimped but not soldered. Corrosion may | ||||
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| cause inaccurate current readings. Cleaning and sol- | |||
Test resistance of the Black and White leads from | dering the terminals to the leads may eliminate that | |||||
1J3 and 2J3 to the shunt. See Figure F.14. | problem. |
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a. If zero ohms resistance (continuity) is shown, | If tests for steps 5, 7, are OK and the machine contin- | |||||
test is OK. |
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| ues to experience the problem, the Control Board | |||
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| should be replaced. |
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b.If resistance of any value is shown, check wire and connections.
FIGURE F.15 - OVERCURRENT PROTECTION CURRENT TRIGGER CIRCUIT.
302275D
6J1 1J1
CONTROL
BOARD
1J3 | 2J3 |
BLACK | WHITE |
L3 |
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| 400 AMP | |
CHOKE | SHUNT | TERMINAL |