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| 8. ELECTRIC MECHANISM |
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| Error status | #1 | The power indicator does not light when the power is turned on. |
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| Probable causes |
| Check/ repair/ adjust |
| Parts to be replaced |
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| 5. Power supply circuit board | • Separate P4 (ACIN) connectors on the |
| Power supply circuit |
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| defective |
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| power supply circuit board, and then |
| board |
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| measure the resistance between the |
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| following pairs of pins, pins 1 and 4 and |
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| pins 2 and 4, in the connector on the |
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| cable. |
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| If the resistance is ∞ Ω in both cases, the |
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| power supply circuit board is not defective. |
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| • Measure the resistance between pins 1 |
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| and 2. |
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| If there is no short, the power supply |
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| circuit board is not defective. |
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| • Rejoin P4 (ACIN) connectors on the |
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| power supply circuit board. |
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| Separate P9 (POWER) connectors on the |
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| main circuit board, turn on the power, and |
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| measure the voltage across pins 1 and 3 |
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| in the connector on the cable. |
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| If it is + 5V, the power circuit board is not |
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| defective. |
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| After measurement, turn off the power, |
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| wait at least 5 minutes, and then rejoin P9 |
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| 3634Q |
| connectors. |
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| 6. Main circuit board defective | • | With P9 (POWER) connectors plugged in |
| Main circuit board |
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| on the main circuit board, turn on the |
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| power, and measure the voltage across |
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| pins 1 and 3 in the connector on the cable. |
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| If it is + 5V, the power circuit board is not |
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| defective. |
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| After measurement, turn off the power. |
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| 3635Q |
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| 7. Panel circuit board defective | • | Check that P8 (PANEL) connectors of the |
| Panel circuit board |
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| main circuit board and P1 (PANEL) |
| Panel cord |
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| connectors of the panel circuit board are |
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| plugged in. |
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| Panel circuit board |
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| • | Check that P20 (RSPORT) connectors of |
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| the main circuit board and P5 (DRV) |
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| connectors of the panel circuit board are |
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| plugged in. |
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| Error status | #2 | Error code appears on the display window when the power is turned on. |
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| Probable causes |
| Check/ repair/ adjust |
| Parts to be replaced |
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| 1. Cooling fan defective when | a. Check threads are not tangled in the |
| DC fan motor assembly |
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| the error code |
| cooling fan. |
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| on the display window. | b. Check P10 (FAN) connectors are |
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| ([E.c1] |
| securely plugged in on the main circuit |
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| board. |
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178 |