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| 8. ELECTRIC MECHANISM |
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| Error status | #8 Error code appears on the display window when the foot switch is depressed. |
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| Probable causes |
| Check/ repair/ adjust |
| Parts to be replaced |
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| 2. Power supply circuit board is | a. Measure the resistance between the fuse |
| Power supply circuit |
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| defective |
| when | the | feed | No.1 terminal which is close to the center |
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| mechanism | does | not | move | of the power supply circuit board and pin |
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| and error code | 2 of P5 (DC300) connector. |
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| on the display window. |
| If the resistance is ∞ Ω, the power supply |
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| ([E.A1] | circuit board is not defective. |
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| b. 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 the following |
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| pairs of pins, pins 4 and 6 and pins 5 and |
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| 7, in the connector on the cord. |
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| If the voltage is +55V in each case, the |
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| power supply 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 rejoin P9 |
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| connectors. |
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| c. 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 2 and 3 |
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| on the cord. |
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| If it is + 24V, the power supply circuit |
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| board is not defective. |
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| After measurement, turn off the power, |
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| wait at least 5 minutes, and rejoin P9 |
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| 3638Q | connectors. |
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| 3. Home position sensor is defec- | a. Turn the poewr switch off and then on |
| Home position sensor |
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| tive when the work clamp | again, and move the work clamp to near |
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| moves | in | an | unexpected | the home position by hand. |
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| direction and error code | If the home position sensor LED is lit, the |
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| appears on the display window. | home position sensor is not defective. |
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| ([E.A1] | b. Check that P1 (ORG) connector on the |
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| main circuit board and the home position |
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| sensor are plugged in. |
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| c. See |
| Main circuit board |
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| DIP switch input” to make sure that the |
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| home position sensor is connected. |
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| If item a causes no problem and item b |
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| results in defective sensor input, either |
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| the cord connection is poor or the main |
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| circuit board is defective. |
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| 4. Pulse motor and cord are | a. Separate P6 (YPM) and P7 (XPM) |
| X- or |
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| defective | when | the | work | connectors on the main circuit board. |
| assembly |
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| clamp operates | abnormally | Measure the resistance between the |
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| and error code | following pairs of pins, pins 4 and 6 and |
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| on the display window. |
| pins 5 and 7, in the connector on the |
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| ([E.A1] | cord. |
| Main circuit board |
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| If the resistance is |
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| defective. |
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| After measurement, rejoin P6 and P7 |
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| connectors. |
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| b. If item a causes no problem, the main |
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| circuit board is defective. |
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| 3639Q |
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182 |