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917.00 service trasfer roller - Lexmark T640 Laser Printer

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That transfer roller is available at for $39.95

Posted on Sep 25, 2009


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the line could be caused by a scratched DRUM unit or a contaminated trasfer roller... And the shadow is probably a broken MICA ROLLER in the FUSER,

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What does this error message mean: "917.00 service transfer roll"

The transfer roller is missing, not touching the drum, poor contact to the transfer high voltage or transfer high voltage shorted.
The trasfer roller is below the drum. Its bearings are on springs to press the paper against the drum. The drum rotates it by gears at one end. One of the bearings have electrical contact with the spring and the spring is connected to the DC controller. The transfer roller receives high voltage that attracts the toner from the drum. It's current is measured and when it's not within specifications the error occures.

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By the write unit i guess you mean the LSU. If you've already ruled out the the image drum and transfer roller you're only left with a few possibilities. I'm also guessing this fault only happened after you replaced the LSU??

1 is there something obstructing the beam from the scanner to the image drum.
2 have you damaged one of the 2 harnesses going into the LSU (check the contiuity) also check the connections on the system board.
3 The high voltage power supply may be faulty.
4 The system board may be faulty.

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