4069-XXX
Main Drive Service Check
Service Tip: Excessive gear or main drive assembly noise is usually caused by a defective motor assembly or engine board.
Service Tip: If there are equally spaced horizontal lines across the page, go to “Print Quality - Evenly spaced horizontal lines or marks” on page
WARNING: Whenever the gearbox assembly is removed from the machine it must be handled very carefully. Do not allow any of the gears to come in contact with any metal or other hard surface to avoid gear damage. It is also very important not to let any dirt, paper, staples or other material come intact with the grease in the gearbox assembly.
| FRU | Action |
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1 | Main Drive Assembly | Remove the controller board and run |
| (Excessive noise or | a Diagnostic Print Test in the |
| vibration) | continuous mode. Check the main |
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| drive assembly for any excessive |
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| noise or vibration. Determine if the |
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| noise is in the main drive, toner |
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| cartridge, fuser or main drive |
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| gearbox. Look for any loose or worn |
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| parts in the developer drive |
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| assembly, main drive gearbox or |
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| fuser. Repair as necessary. |
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2 | Main Drive Motor Assembly | A service error code 936 - Transport |
| (Excessive noise, gears | Motor may be displayed. Check the |
| ratcheting and so on) | voltage at |
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| board. It measures approximately |
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| +5 V dc when the motor is not |
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| running and goes to 0 V dc when the |
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| motor is running. If incorrect, replace |
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| the engine board. If this does not fix |
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| the problem, replace the main drive |
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| motor. |
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3 | Main Drive Motor Cable | Check the continuity of the main |
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| drive motor cable. If incorrect, |
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| replace the cable. |
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