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TROUBLESHOOTING AND REPAIR | |||
| MAIN TRANSFORMER TEST (continued) |
| |
14. | Locate the following leads on plug J5 | d. If ALL the voltages tested are incor- | |
| on the Control PC board. See Figure | rect or missing, go to step 16. | |
| F.1. |
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| PLUG |
LEAD | LOCATION |
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206 | 3J5 |
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17.Test for correct nameplate input voltage between the H1 lead at the ON/OFF POWER SWITCH to H2 or H3 (H5 if connected for 575 VAC) at the reconnect panel. Voltage tested will vary depending on input voltage connection. See wiring diagram for test point locations.
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| PLUG |
LEAD | LOCATION |
2082J5
2091J5
15.
Turn the machine ON.
16.Make the following voltage tests at plug J5 on the Control PC board.
a.Turn the machine OFF between each test.
b.Carefully insert the meter probes into the back of each Molex plug pin cavity to perform the test.
c.If any of the voltages tested are incorrect, check for loose or broken leads between the test points and the main transformer.
a.If the voltage test is incorrect,
b.If the correct nameplate voltage is being applied to the main trans- former and one or more of the sec- ondary voltages are missing or are incorrect, the main transformer may be faulty. Replace.
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FROM | TO | EXPECTED |
LEAD | LEAD | VOLTAGE |
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208 | 209 | 56VAC |
(2J5) | (1J5) |
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208 | 206 | 28VAC |
(2J5) |
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209 | 206 | 28VAC |
(1J5) |
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