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Printer and Photocopier Troubleshooting and Repair Collection : Print head stepper
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1994-2007, Samuel M. Goldwasser. All Rights Reserved. Reproduction of this document in whole or in part is permitted if both of the following conditions are satisfied: 1. This notice is included in its entirety at the beginning. 2. There is no charge except to cover the costs of copying.
I may be contacted via the Sci.Electronics.Repair FAQ (www.repairfaq.org) Email Links Page.
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Confirm that you simply don't have bad solder connections around the plug to
the motor. This is common in printers and will result in erratic or incorrect
motor movement.
(From: Ralph Wade Phillips (ralphp@gcstation.net).)
What's common in some older Okidata 32x's and 39x's is that the lithium
battery ABOVE the stepper driver will spring a leak, and drop the lithium
compound onto the legs of the stepper. I do not know for sure if it's
corrosive, conductive, or just plain nasty, but it kills the stepper
deader'n'snot.
I'd LOVE to find a replacement - I've got a service customer that has about
2,500(!!!) 320's and 321's in the field, and I am not looking forward to
having to exchange all those boards over the next several years.