4090-001
| FRU | Action |
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2 | Paper Feed Motor | A noisy or chattering motor or a motor that fails to |
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| turn, can be caused by: |
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| • An open or short in the motor |
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| • An open or short in the motor driver on the |
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| system board |
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| • A bind in the paper feed mechanism |
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| With the paper feed motor cable disconnected |
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| from the system board, check for 5 to 10 ohms |
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| between pin 1 and 4 on the motor cable. |
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| If the reading is incorrect, replace the motor. |
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| Check for motor pins shorted to the motor housing. |
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| If you find a shorted pin, replace the motor. If the |
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| failure remains, replace the system board. |
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| Although the paper feeds in a forward direction |
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| only, the paper feed motor turns in two directions. |
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| If the paper feed motor turns in one direction only, |
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| replace the system board. |
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| Binds in the paper feed motor or gear train can |
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| cause intermittent false paper jam errors. Remove |
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| the paper feed motor and check the shaft for binds. |
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| Also check for loose or worn motor gear. |
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3 | Gears | Check for binds in the gear train and paper feed |
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| mechanism by rotating the large feed roll by hand. |
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| If you notice a bind, isolate it by removing one of |
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| the small idler gears on the inside of the left side |
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| frame. Replace any worn or binding gears or |
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| rollers. |
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4 | Feed Arm | At the beginning of the paper feed operation, the |
| Assembly | paper feed motor reverses momentarily to allow |
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| the feed arm pawl to drop off the home position |
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| notch in the left side frame. If the pawl fails to drop |
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| off the notch, check the feed arm assembly for |
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| binds, and worn or broken parts. |
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5 | Paper Path | Perform the ’Paper Path Service Check’ on page |
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