8. ELECTRIC MECHANISM
Error status | #11 The TEST indicator does not light when the TEST switch is pressed. |
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| Probable causes |
| Check/ repair/ adjust | Parts to be replaced | ||
1. TEST switch and its cord are | • | Separate P8 (PANEL) connectors on the | Panel PCB or | panel | ||
defective. |
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| main circuit board, and measure the | cable assembly |
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| resistance between pins 2 and 20 in the |
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434*, 435*, 484C, |
| connector on the cord with the polarity |
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| shown in the left figure. |
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| (Use of a digital meter is prohibited.) |
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| If the resistance is normally ∞ Ω, or the |
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| needle oscillates at its maximum limits |
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| when the TEST switch is pressed, the |
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| TEST indicator and its cord are not |
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| defective. |
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| Black | Red |
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| 3644Q |
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2. TEST indicator and its cord | • | Measure the resistance between pins 1 | Panel PCB or | panel | ||
are defective. |
| and 12 with the same method as above. | cable assembly |
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| If the needle oscillates at its maximum |
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434*, 435*, 484C, |
| limits, the TEST indicator and its cord are |
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| not defective. |
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Black | Red |
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| 3645Q |
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3. Main circuit board defective |
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| Main circuit board |
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4. Panel PCB defective | • | Check that P20 (RSPORT) connectors of | Panel circuit board | |||
| 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 | #12 The feed mechanism does not slowly move stitch by stitch during test sewing. |
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| Probable causes |
| Check/ repair/ adjust | Parts to be replaced | ||
1. Foot switch and cord defec- | • | See #7. |
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tive |
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2. Incorrect | memory switch | • | Set |
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setting |
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| setting is ON.) |
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| • | Set |
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Error status | #13 Quick feeding cannot be performed during test sewing. |
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| Probable causes |
| Check/ repair/ adjust | Parts to be replaced | ||
1. Foot switch and cord defec- | • | See #7. |
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tive |
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185 |