Most of the articles on this document have been compiled over the last few years from postings around the USENET newsgroup sci. electronics captive market. repair. I cannot vouch for any accuracy of all of the recommendations they contain nevertheless have edited out anything at all I felt was fully bogus. I apologize if your response isn't here - it has been that I missed the posting and definately will welcome contributions.
Note that a lot of the problems and solutions will be listed with respect that will specific models. Even though stepper motor your model and problem may not be included, there is a great chance your problem will be covered but with respect to a few other model printer or maybe copier. Therefore, search for a common description of the symptoms and you'll get lucky.
Since the operation of laser printers and photocopiers is quite similar, check both chapters to discover if your problem is covered when dealing with either type equipment.
There is a chapter on fax machine problems though it really is pretty sparse at this time.
Eventually, this document may perhaps be expanded brushless dc motor controller into a full "Notes within the Troubleshooting and Repair connected with Printers and Photocopiers". For the present time, be happy that it exists whatsoever!:-)
As always, feedback, suggestions, and corrections tend to be welcome.
Portions of the following document also appear with PrinterCartridgesInk. com under "Printer Advice". As much as I know, this was done with out my permission but since he included the correct attribution and copyright updates, I'm not complaining. The formatting could even be a bit improved.:)
See the insurance: Troubleshooting and Repair regarding Consumer Electronics Equipment pertaining to brushless dc motor general information on applications, test equipment, tips, movements, and much more.
SECURITY
Also see the record: Safety Guidelines for Substantial Voltage and/or Line Driven Equipment.
While printers are not really generally considered dangerous devices (compared to TV, displays, and microwave ovens, on least), some types - laser printers in particular - present a nice selection of hazards that should not be underestimated. In addition, photocopiers - particularly larger broadband machines - should be treated with great admiration while servicing.
There tend to be minimal dangers in servicing most printers. However, could possibly be exposed line nema stepper motor voltage close to the line cord and extended hair or neck-ties can be sucked in along using paper! Laser printers have their lasers but they're generally located such that accidental exposure into the beam is minimized. Your toner in copiers, simply paper faxes, and laser printers may perhaps be harmful if inhaled which is a potential fire/explosion danger if carelessly vacuumed. All these possible safety issues can be discussed below with additional specific information in the chapters for the gear to which it does apply. All in all, taking care of nema stepper motor printers is relatively small risk.
The first couple of items applies to just about all line operated printers:
The input power is 110 VAC (or 220 to 240 VAC subject to where you live). If it can be crucial to work inside with all the power on, identify the positioning of any exposed terminals plus cover them with naff electrical tape or block accidental access using some other way. This is a lot more dangerous than the high voltage specific to laser printers and photocopiers (see below).
• Some equipment of the type uses https://www.omc-stepperonline.com/cnc-kit/ switchmode electric power supplies. Their internal voltages may exceed 300 VDC, include large capacitors, and all the front-end is likely line-connected. Apart from staying away, if power problems are suspected, one must take intense care in troubleshooting a majority of these power supplies both intended for personal safety and because it is rather easy to destroy these folks (and possibly the powered equipment) thanks to a misplaced probe. When there is NO large power transformer close to the power input but more than one smaller transformers (possibly along with HV warning cnc router kit labels) amid-ships within the power board, you probably have got a switcher! See the insurance: Notes on the Troubleshooting as well as Repair of Small Switchmode Power Supplies to get more information.
• Moving segments can grab dangling neckties (yes, I'm sure, you haven't worn such an example in 17 years! ) and jewelry - remove any you could be wearing.
• There will be a variety of sharp sheet metal along with other parts to gouge flesh. Avoid sudden uncontrolled action.
• Dot matrix in addition to thermal print heads may perhaps be HOT - stay very clear.
